Re: First semi-annual groundwater monitoring event of the 2017 monitoring period for Las Cruces Foothills Landfill

Transcription

1 September 27, 2017 Mr. James Dyer NMED/SWB, Permitting Section P.O. Box Santa Fe, New Mexico Re: First semi-annual groundwater monitoring event of the 2017 monitoring period for Las Cruces Foothills Landfill Dear Mr. Dyer: On behalf of Las Cruces Utilities (LCU), John Shomaker & Associates, Inc. (JSAI) has prepared this first semi-annual groundwater monitoring report for the 2017 monitoring period at Las Cruces Foothills Landfill. This report was prepared according to the requirements listed in N NMAC, and includes the following items: Table 1 summarizing parameters detected above the AML in monitor wells sampled, presented below ( N NMAC requirements (12), (20)) Figure 1 groundwater elevation contour map, attached to this letter report ( N NMAC requirements (6), (18)) tables with summary of water-level elevation measurements (App. A) tables with baseline and background monitoring data for monitor wells sampled, attached to this letter report ( N NMAC requirements (3), (12), (19)) (App. B) laboratory reports, attached to this letter report ( N NMAC requirements (1), (2), (4), (5), (7) through (15), (17)) (App. C) Review of the groundwater monitoring results did not reveal any anomalies in the datasets ( N NMAC requirement (16). LCU Staff performed the first semi-annual monitoring event of 2017 at Las Cruces Foothills Landfill on June 27 and 28, Monitor wells MW-1, MW-2, MW-4, MW-5, MW-6, MW-7, and MW-9 were sampled in June Pumps at MW-3 and MW-8 were found to have malfunctioned in December 2016, and the replacement pumps were not yet installed for the June 2017 sampling event; NMED/SWB indicated that it would be best to go ahead with the June 2017 sampling of the other monitoring wells instead of delaying sampling of wells until pumps are installed at MW-3 and MW-8 (May 23, 2017 correspondence between Mr. Josh Rosenblatt at LCU and George Schuman at NMED/SWB). It should be noted, however, that the new variable speed pumps have now been installed at MW-3 and MW-8; these pumps will allow for low-flow sampling methodology. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

2 Mr. James Dyer September 27, 2017 Due to low yield and slow rate of recovery, monitor wells were purged about 1 week prior to sampling. Additional purging of these wells was performed on the day of sampling to the extent possible based on drawdown. Review of the laboratory results for Las Cruces Foothills Landfill monitor wells MW-1, MW-2, MW-4, MW-5, MW-6, MW-7, and MW-9 did not reveal any anomalies in the dataset. Water levels were measured at MW-1, MW-2, MW-4, MW-5, MW-6, MW-7, and MW-9 on June 21 and 22, 2017, prior to purging. Water levels at MW-3 and MW-8 were measured on August 2, Based on the depth-to-water measurements collected in June and August 2017, the direction of groundwater flow beneath the landfill remains west-southwest (Fig. 1). Table 1 presents monitor wells and parameters for which the Assessment Monitoring Level (AML) was exceeded in the first semi-annual monitoring event of Figures 2 through 5 present graphs of historical data for these parameters. The AML of milligrams per liter (mg/l) for tetrachloroethene (PCE) was exceeded by less than mg/l in monitor wells MW-1, MW-4, MW-5, MW-6, and MW-7. Historical PCE trends that show fluctuations and overall decreasing concentrations at MW-2 and MW-6 suggest that PCE is naturally attenuating at these locations (Fig. 2). PCE concentrations at MW-7 have increased over the last three sampling events, but the concentrations are still within historical fluctuations; these fluctuations may also be an indication of natural attenuation. Table 1. Summary of parameters that were detected above the AML in monitor wells at Las Cruces Foothills Landfill, New Mexico monitor well sampling event parameter units GWPS CAL AML result 1 MW-1 MW-4 6/27/17 tetrachloroethene (PCE) 1 mg/l /27/17 trichloroethene (TCE) 1 mg/l /28/17 tetrachloroethene (PCE) 1 mg/l /28/17 trichloroethene (TCE) 1 mg/l /28/17 methylene chloride 1 mg/l MW-5 6/27/17 tetrachloroethene (PCE) 1 mg/l MW-6 6/27/17 tetrachloroethene (PCE) 1 mg/l MW-7 6/27/17 tetrachloroethene (PCE) 1 mg/l /27/17 trichloroethene (TCE) 1 mg/l /27/17 trichlorofluoromethane 1 mg/l na na b Identified as hazardous in NMAC b 95-percent increase over practical quantitation limit (PQL) bold text indicates concentrations that exceed the AML GWPS - groundwater protection standard CAL - corrective action level, 75 percent of the GWPS AML - assessment monitoring level mg/l - milligrams per liter na - no GWPS for this parameter WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

3 Mr. James Dyer September 27, 2017 The AML of mg/l for trichloroethene (TCE) was exceeded by less than mg/l in MW-1, MW-4, and MW-7, the AML of mg/l for methylene chloride was exceeded by mg/l in MW-4, and the AML of mg/l for trichlorofluoromethane was exceeded by mg/l in MW-7. These are the same constituents of concern observed in the same monitor wells as in previous monitoring events at Las Cruces Foothills Landfill (see Figs. 2 through 5). These constituents of concern have been below detection limits in MW-9, which is located down-gradient of the landfill. The second semi-annual groundwater monitoring report for the 2017 monitoring period will include the results of this first semi-annual monitoring event and the second semi-annual event, as well as analysis and interpretation of 2017 results, historical trends, and a discussion of the nature and extent of groundwater contaminants and contaminant transport mechanisms, as have been included in the second semi-annual reports in 2013 through Please let me know if you have any questions or comments. Sincerely, AMM:am Annie McCoy Senior Hydrogeologist Enc: Figures 1 through 5 Appendix A. Summary of water-level measurements Appendix B. Baseline and background monitoring data Appendix C. Copy of laboratory reports for the June 27 and 28, 2017 sampling event cc + enc: Carl Clark, Las Cruces Utilities (two complete bound copies) Josh Rosenblatt, Las Cruces Utilities (one complete bound copy) WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

4 Mr. James Dyer September 27, 2017 ILLUSTRATIONS Figure 1. Aerial photograph showing locations of Las Cruces Foothills Landfill monitor wells, groundwater-elevation contours, and direction of groundwater flow in June Figure 2. Graph showing tetrachloroethene (PCE) concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico. Figure 3. Graph showing trichloroethene (TCE) concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico. Figure 4. Graph showing methylene chloride concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico. Figure 5. Graph showing trichlorofluoromethane concentrations versus time for monitor wells MW-2, MW-4 and MW-7, Las Cruces Foothills Landfill, New Mexico. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

5 !! 4000 R02E ³ MW-9 East $ Lohman Ave MW MW !!!!!!!!!!!!!!!!!!! 3840! MW MW ! !!!! 3800 MW-7 LAFILL < MW !!!! !! 3960!!!!!! 3980!!!!!! 4000!!!!!! !!!!!!! MW T23S Explanation MW-8 landfill well C:\ACAD\Las_Cruces\Landfill\Landfill monitoring.mxd < $ arroyo flow direction water-level elevation contour, ft amsl unlined stormwater containment pond top of bedrock contour, ft amsl (USGS WRIR ) area where top of bedrock high is above the water table 3900 city limits ,000 2,000 Feet Figure 1. Aerial photograph showing locations of Las Cruces Foothills Landfill monitor wells, groundwaterelevation contours, and direction of groundwater flow in June 2017.

6 MW-1 Graph values of mg/l represent sample results below the lab detection limits MW-2 GWPS is mg/l. AML is 50 percent of GWPS Dec-98 Dec-99 Dec-00 Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 PCE concentration, mg/l Dec-08 Dec-09 Dec-10 Dec-11 Dec-12 Dec-13 Dec-14 Dec-15 Dec-16 Dec-17 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 GWPS AML Figure 2. Graph showing tetrachloroethene (PCE) concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico.

7 MW-1 MW-2 Graph values of mg/l represent sample results below the lab detection limits. GWPS is mg/l. AML is 50 percent of GWPS Dec-98 Dec-99 Dec-00 Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 Dec-08 Dec-09 Dec-10 Dec-11 Dec-12 Dec-13 Dec-14 Dec-15 Dec-16 Dec-17 TCE concentration, mg/l MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 AML GWPS Figure 3. Graph showing trichloroethene (TCE) concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico.

8 MW-1 MW-2 MW-3 MW-4 MW-5 Graph values of mg/l represent sample results below the lab detection limits. GWPS is mg/l. AML is 50 percent of GWPS Dec-98 Dec-99 Dec-00 Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 Dec-08 Dec-09 Dec-10 Dec-11 Dec-12 Dec-13 Dec-14 Dec-15 Dec-16 Dec-17 methylene chloride concentration, mg/l MW-6 MW-7 MW-8 MW-9 AML GWPS Figure 4. Graph showing methylene chloride concentrations versus time for monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, New Mexico.

9 MW-2 MW-4 Graph values of mg/l represent sample results below the lab detection limits. AML is (PQL + (0.95*PQL)) = mg/l. trichlorofluoromethane concentration, mg/l MW Dec-98 Dec-99 Dec-00 Dec-01 Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 Dec-08 Dec-09 Dec-10 Dec-11 Dec-12 Dec-13 Dec-14 Dec-15 Dec-16 Dec-17 AML Figure 5. Graph showing trichlorofluoromethane concentrations versus time for monitor wells MW-2, MW-4 and MW-7, Las Cruces Foothills Landfill, New Mexico.

10 Mr. James Dyer September 27, 2017 Appendix A. Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

11 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-1 01/11/99 4, , MW-1 04/01/99 4, , MW-1 05/06/99 4, , MW-1 07/07/99 4, , MW-1 09/15/99 4, , MW-1 11/03/99 4, , MW-1 05/18/00 4, , MW-1 06/13/01 4, , MW-1 10/29/01 4, , MW-1 11/06/01 4, , MW-1 03/25/02 4, , MW-1 04/03/02 4, , MW-1 07/12/02 4, , MW-1 09/25/02 4, , MW-1 12/18/02 4, , MW-1 07/15/03 4, , MW-1 12/29/03 4, , MW-1 12/02/04 4, , MW-1 12/14/05 4, , MW-1 12/12/06 4, , MW-1 01/11/08 4, , MW-1 12/23/08 4, , MW-1 12/29/09 4, , MW-1 12/29/10 4, , MW-1 12/27/11 4, , MW-1 12/12/12 4, , MW-1 06/18/13 4, , MW-1 12/12/13 4, , MW-1 06/19/14 4, , MW-1 12/11/14 4, , MW-1 06/18/15 4, , MW-1 12/17/15 4, , MW-1 06/09/16 4, , MW-1 12/20/16 4, , MW-1 06/21/17 4, , MW-2 01/11/99 4, , MW-2 04/01/99 4, , MW-2 05/06/99 4, , measurement made from ground level ft amsl - feet above mean sea level ft bmp - feet below measuring point WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

12 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (continued) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-2 07/07/99 4, , MW-2 09/15/99 4, , MW-2 11/03/99 4, , MW-2 05/18/00 4, , MW-2 11/09/00 4, , MW-2 06/13/01 4, , MW-2 10/29/01 4, , MW-2 11/02/01 4, , MW-2 11/06/01 4, , MW-2 03/25/02 4, , MW-2 04/03/02 4, , MW-2 07/12/02 4, , MW-2 09/25/02 4, , MW-2 12/18/02 4, , MW-2 07/15/03 4, , MW-2 12/29/03 4, , MW-2 12/02/04 4, , MW-2 12/14/05 4, , MW-2 12/12/06 4, , MW-2 01/11/08 4, , MW-2 12/23/08 4, , MW-2 12/29/09 4, , MW-2 12/29/10 4, , MW-2 12/27/11 4, , MW-2 12/12/12 4, , MW-2 06/19/13 4, , MW-2 12/12/13 4, , MW-2 06/19/14 4, , MW-2 12/11/14 4, , MW-2 06/18/15 4, , MW-2 12/17/15 4, , MW-2 06/09/16 4, , MW-2 12/20/16 4, , MW-2 06/21/17 4, , MW-3 01/11/99 4, , MW-3 04/01/99 4, , MW-3 05/06/99 4, , MW-3 07/07/99 4, , MW-3 09/15/99 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

13 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (continued) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-3 11/03/99 4, , MW-3 05/18/00 4, , MW-3 11/09/00 4, , MW-3 06/13/01 4, , MW-3 10/29/01 4, , MW-3 11/02/01 4, , MW-3 11/06/01 4, , MW-3 03/25/02 4, , MW-3 04/03/02 4, , MW-3 07/12/02 4, , MW-3 09/25/02 4, , MW-3 12/18/02 4, , MW-3 07/15/03 4, , MW-3 12/29/03 4, , MW-3 12/02/04 4, , MW-3 12/14/05 4, , MW-3 12/12/06 4, , MW-3 01/11/08 4, , MW-3 12/23/08 4, , MW-3 12/29/09 4, , MW-3 12/29/10 4, , MW-3 05/12/11 4, , MW-3 12/20/11 4, , MW-3 06/12/12 4, , MW-3 12/12/12 4, , MW-3 06/18/13 4, , MW-3 12/12/13 4, , MW-3 06/19/14 4, , MW-3 12/04/14 4, , MW-3 06/18/15 4, , MW-3 12/17/15 4, , MW-3 06/09/16 4, , MW-3 12/20/16 4, , MW-3 08/02/17 4, , MW-4 01/11/99 4, , MW-4 04/01/99 4, , MW-4 05/06/99 4, , MW-4 07/07/99 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

14 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (continued) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-4 09/15/99 4, , MW-4 11/03/99 4, , MW-4 05/18/00 4, , MW-4 11/09/00 4, , MW-4 06/13/01 4, , MW-4 10/29/01 4, , MW-4 11/06/01 4, , MW-4 03/25/02 4, , MW-4 04/03/02 4, , MW-4 07/12/02 4, , MW-4 09/25/02 4, , MW-4 12/18/02 4, , MW-4 07/15/03 4, , MW-4 12/29/03 4, , MW-4 12/02/04 4, , MW-4 12/14/05 4, , MW-4 12/12/06 4, , MW-4 01/11/08 4, , MW-4 12/23/08 4, , MW-4 12/29/09 4, , MW-4 12/29/10 4, , MW-4 12/27/11 4, , MW-4 06/12/12 4, , MW-4 12/12/12 4, , MW-4 06/19/13 4, , MW-4 12/12/13 4, , MW-4 06/19/14 4, , MW-4 12/04/14 4, , MW-4 06/18/15 4, , MW-4 12/17/15 4, , MW-4 06/09/16 4, , MW-4 12/20/16 4, , MW-4 06/22/17 4, , MW-5 07/15/03 4, , MW-5 08/27/03 4, , MW-5 09/29/03 4, , MW-5 10/27/03 4, , MW-5 11/25/03 4, , MW-5 12/29/03 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

15 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (continued) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-5 12/02/04 4, , MW-5 12/14/05 4, , MW-5 12/12/06 4, , MW-5 01/11/08 4, ,835.0 MW-5 12/23/08 4, , MW-5 12/29/09 4, , MW-5 12/29/10 4, , MW-5 12/28/11 4, , MW-5 06/12/12 4, , MW-5 12/13/12 4, , MW-5 06/19/13 4, , MW-5 08/06/14 4, , MW-5 12/11/14 4, , MW-5 07/23/15 4, , MW-5 02/12/16 4, , MW-5 06/09/16 4, , MW-5 12/20/16 4, , MW-5 06/21/17 4, , MW-6 07/15/03 4, , MW-6 08/27/03 4, , MW-6 09/29/03 4, , MW-6 10/27/03 4, , MW-6 11/25/03 4, , MW-6 12/29/03 4, , MW-6 12/02/04 4, , MW-6 12/14/05 4, , MW-6 12/12/06 4, , MW-6 01/11/08 4, , MW-6 12/23/08 4, , MW-6 12/29/09 4, , MW-6 12/29/10 4, , MW-6 12/28/11 4, , MW-6 06/12/12 4, , MW-6 12/13/12 4, , MW-6 06/18/13 4, , MW-6 08/06/14 4, , MW-6 12/11/14 4, , MW-6 07/23/15 4, , MW-6 02/12/16 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

16 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (continued) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-6 06/09/16 4, , MW-6 12/21/16 4, , MW-6 06/21/17 4, , MW-7 07/15/03 4, , MW-7 08/27/03 4, , MW-7 09/29/03 4, , MW-7 10/27/03 4, , MW-7 11/25/03 4, , MW-7 12/29/03 4, , MW-7 12/02/04 4, , MW-7 12/14/05 4, , MW-7 12/12/06 4, , MW-7 01/11/08 4, ,910.7 MW-7 12/23/08 4, , MW-7 12/29/09 4, , MW-7 12/29/10 4, , MW-7 12/28/11 4, , MW-7 06/12/12 4, , MW-7 12/13/12 4, , MW-7 06/19/13 4, , MW-7 12/12/13 4, , MW-7 06/19/14 4, , MW-7 12/11/14 4, , MW-7 06/18/15 4, , MW-7 12/11/15 4, , MW-7 06/09/16 4, , MW-7 12/21/16 4, , MW-7 06/21/17 4, , MW-8 12/29/10 4, , MW-8 05/18/11 4, , MW-8 08/23/11 4, , MW-8 11/28/11 4, , MW-8 12/29/11 4, , MW-8 12/13/12 4, , MW-8 06/18/13 4, , MW-8 08/06/14 4, , MW-8 12/11/14 4, , MW-8 07/23/15 4, , MW-8 02/12/16 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

17 Mr. James Dyer September 27, 2017 Summary of water-level measurements from monitor wells MW-1 through MW-9, Las Cruces Foothills Landfill, Las Cruces, New Mexico (concluded) well date top of casing elevation (ft amsl) depth to water (ft bmp) water-level elevation (ft amsl) MW-8 06/09/16 4, , MW-8 12/21/16 4, , MW-8 08/02/17 4, , MW-9 12/29/10 4, , MW-9 05/18/11 4, , MW-9 08/23/11 4, , MW-9 11/28/11 4, , MW-9 12/29/11 4, , MW-9 12/20/12 4, , MW-9 06/26/13 4, , MW-9 08/06/14 4, , MW-9 12/11/14 4, , MW-9 07/23/15 4, , MW-9 02/12/16 4, , MW-9 06/09/16 4, , MW-9 12/21/16 4, , MW-9 06/22/17 4, , ft bmp - feet below measuring point ft amsl - feet above mean sea level WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

18 Mr. James Dyer September 27, 2017 Appendix B. Baseline and background monitoring data for monitor wells MW-1 through MW-9 Las Cruces Foothills Landfill, Las Cruces, New Mexico WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

19 Mr. James Dyer September 27, 2017 MW-1 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

20 Las Cruces Foothills Landfill monitoring well MW-1 APPEIX B Las Cruces Foothills Landfill MW-1 constituent CAS Number unit GWPS RESULTS FOR MW-1 date 3/1/90 5/19/92 7/20/92 12/7/93 6/7/96 5/11/99 7/7/99 9/15/99 11/3/99 5/18/00 11/9/00 6/13/01 Page 1 of 9 Field Parameters water level elevation - ft amsl - x x x x x x conductivity - µs/cm x 300 x ph - ph units x temperature - deg F Major Ions calcium mg/l x 24.7 x chloride mg/l x 16.1 x fluoride mg/l x 0.62 x magnesium mg/l x 5.7 x potassium mg/l x 1.6 x sodium mg/l x 31.9 x sulfate mg/l x 34.6 x alkalinity - mg/l x 96.5 x bicarbonate alkalinity mg/l x x carbonate alkalinity mg/l - <1.0 <1.0 x <1.0 x <1.0 <1.0 <1.0 <1.0 < total dissolved solids - mg/l 1, x 213 x Nitrogen Species ammonia as N mg/l - x 1.08 x 0.27 x <0.01 Kjeldahl nitrogen mg/l - x 1.1 x 0.8 x nitrate as N mg/l 10 x 1.21 x 3.22 x nitrite mg/l - < x 3.22 x <0.05 < <0.05 <0.05 total nitrogen - mg/l - Metals aluminum mg/l 5.0 x 0.28 x x <0.05 <0.05 < <0.05 antimony mg/l x x x x x < < < < < < arsenic mg/l x x barium mg/l x 0.09 x beryllium mg/l x x x x x < < < < < < < boron mg/l 0.75 x 0.1 x 0.05 x < cadmium mg/l <0.005 <0.005 x <0.005 x < < < < chromium mg/l x x < < < cobalt mg/l 0.05 x <0.01 x <0.01 x < <0.01 <0.01 <0.01 <0.01 <0.01 copper mg/l 1.0 x 0.03 x x <0.01 < iron mg/l x 4.86 x < lead mg/l x x < manganese mg/l x 0.05 x <0.005 mercury mg/l < < x < x < < < < < molybdenum mg/l 1.0 x <0.05 x <0.05 x <0.05 <0.05 <0.05 < nickel mg/l 0.2 x <0.05 x <0.05 x selenium mg/l 0.05 < x x < < silver mg/l 0.05 <0.02 <0.02 x <0.02 x <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 thallium mg/l x x x x x < < < < tin mg/l - uranium mg/l 0.03 x x x x < vanadium mg/l - x x x x x < <0.05 <0.05 x <0.05 <0.05 zinc mg/l 10.0 x 0.86 x 0.14 x x 0.21 <0.01 total organic carbon - mg/l - x x x 0.5 x phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 x x <0.02 <0.02 x <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 perchlorate mg/l - total phenolics 1 - mg/l x x 0.03 x x 0.02 <0.02 <0.003 <0.003 <0.003 < Polychlorinated Biphenyls (PCBs) mg/l x x < < x < < < < < < < Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - x x <0.001 x x <0.001 < < < < < < ,1,1-Trichloroethane mg/l 0.06 x x <0.001 x x <0.001 < < < < < < ,1,2,2-Tetrachloroethane mg/l 0.01 x x <0.001 x x <0.001 < < < < < < ,1,2-Trichloroethane mg/l x x <0.001 x x <0.001 < < < < < < ,1-Dichloroethane mg/l x x <0.001 x x <0.001 < < < < < < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l x x <0.001 x x <0.001 < < < < < < ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l x x x x x < < < < < < < ,2,3-Trichlorobenzene mg/l - x x <0.001 x x <0.001 < < < < < < ,2,3-Trichloropropane mg/l - x x <0.001 x x <0.001 < < < < < < ,2,4-Trichlorobenzene mg/l - x x <0.001 x x <0.001 < < < < < < ,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l x x <0.001 x x <0.001 < < < < < < ,2-Dichloropropane mg/l x x <0.001 x x <0.001 < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - x x <0.001 x x <0.001 < < < < < < ,3-Dichloropropane mg/l - x x <0.001 x x <0.001 < < < < < < ,4-Dichlorobenzene (p-dichlorobenzene) mg/l x x <0.001 x x <0.001 < < < < < < ,2-Dichloropropane mg/l - x x <0.001 x x <0.001 < < < < < < Butanone (Methyl Ethyl Ketone) (MEK) mg/l - x x <0.005 x x <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 < Chlorotoluene mg/l - x x <0.001 x x <0.001 < < < < < < Hexanone (Butyl Ketone) mg/l - x x <0.002 x x x <0.002 <0.002 <0.002 <0.002 <0.002 < Chlorotoluene mg/l - x x <0.001 x x <0.001 < < < < < < Methyl-2-pentanone mg/l - x x x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Acetone mg/l - x x <0.005 x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Acrolein mg/l - Acrylonitrile mg/l - x x x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Benzene mg/l x x <0.001 x x <0.001 < < < < < < Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - x x <0.001 x x <0.001 < < < < < < Bromomethane (methyl bromide) mg/l - <0.001 <0.001 < < < < < < < <0.002 < < Carbon Disulfide mg/l - x x x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Carbon Tetrachloride mg/l x x <0.001 x x <0.001 < < < < < < Chlorobenzene mg/l 0.1 x x <0.001 x x <0.001 < < < < < < Chloroethane mg/l - x x <0.001 x x <0.001 < < < < < < Chloromethane (methyl chloride) mg/l - x x <0.001 x x <0.001 < < < < < < Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 x x x x x <0.001 < < < < < < cis-1,3-dichloropropene mg/l - x x <0.001 x x <0.001 < < < < < < Dibromomethane (methylene bromide) mg/l - x x <0.001 x x <0.001 < < < < < < Dichlorodifluoromethane mg/l - x x <0.001 x x < Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 x x <0.001 x x <0.001 < < < < < < Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 x x x < x < < < < < < < Hexachlorobutadiene mg/l - x x <0.001 x x <0.001 < < < < < < Isobutyl alcohol mg/l - Isopropylbenzene mg/l - x x <0.001 x x <0.001 < < < < < < WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

21 Las Cruces Foothills Landfill monitoring well MW-1 APPEIX B Las Cruces Foothills Landfill MW-1 constituent CAS Number unit GWPS RESULTS FOR MW-1 date 3/1/90 5/19/92 7/20/92 12/7/93 6/7/96 5/11/99 7/7/99 9/15/99 11/3/99 5/18/00 11/9/00 6/13/01 Page 2 of 9 Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - x x x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Methyl methacrylate mg/l - Methylene Chloride mg/l x x <0.005 x x <0.002 < < < < < < n-butylbenzene mg/l - x x <0.001 x x <0.001 < < < < < < Propionitrile mg/l - Propylbenzene mg/l - x x <0.001 x x <0.001 < < < < < < sec-butylbenzene mg/l - x x <0.001 x x <0.001 < < < < < < Styrene mg/l 0.1 x x <0.001 x x <0.001 < < < < < < tert-butyl methyl ether (MTBE) (a) mg/l 0.1 x x <0.005 x x <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 tert-butylbenzene mg/l - x x <0.001 x x <0.001 < < < < < < Tetrachloroethene (PCE) mg/l x x x x Tetrahydrofuran (THF) mg/l - x x <0.005 x x <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Toluene mg/l 0.75 x x <0.001 x x <0.001 < < < < < < Total Xylenes (m&p and o) 1 - mg/l 0.62 x x <0.001 x x < < < < < < trans-1,2-dichloroethene mg/l 0.1 x x <0.001 x x <0.001 < < < < < < trans-1,3-dichloropropene mg/l - x x <0.001 x x <0.001 < < < < < < trans-1,4-dichloro-2-butene mg/l - x x <0.002 x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Trichloroethene (TCE) mg/l x x <0.001 x x <0.001 < < < < < Trichlorofluoromethane mg/l - x x <0.001 x x <0.001 < < < < < < Vinyl acetate mg/l - x x <0.001 x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Vinyl Chloride mg/l x x x x x <0.001 < < < < < < Trihalomethanes (THM) Bromodichloromethane mg/l - x x <0.001 x x <0.001 < < < < < < Bromoform mg/l - x x <0.001 x x <0.001 < < < < < < Chloroform mg/l 0.1 x x <0.001 x x <0.001 < < < < < < Dibromochloromethane mg/l - x x <0.001 x x <0.001 < < < < < < Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene - mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l x x x <0.001 x <0.001 < < < < < < Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 x x <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 < < Nitrobenzene mg/l - WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

22 Las Cruces Foothills Landfill monitoring well MW-1 APPEIX B Las Cruces Foothills Landfill MW-1 constituent CAS Number unit GWPS RESULTS FOR MW-1 date 3/1/90 5/19/92 7/20/92 12/7/93 6/7/96 5/11/99 7/7/99 9/15/99 11/3/99 5/18/00 11/9/00 6/13/01 Page 3 of 9 n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - x x <0.01 <0.01 x <0.001 < < < < < < p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - x x <0.01 <0.01 x < < < < < < < Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics x 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - 5-Nitro-o-toluidine mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and pci/l Ra-226, total pci/l - x x Ra-228 1, total pci/l - x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentrations. (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of antimony in the ground water sampled. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

23 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-1 Page 4 of 9 RESULTS FOR MW-1 11/6/01 4/3/02 7/12/02 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 Field Parameters water level elevation - ft amsl , , , , , , , conductivity - µs/cm ph - ph units temperature - deg F Major Ions calcium mg/l x chloride mg/l x fluoride mg/l x x x x x 0.54 magnesium mg/l x potassium mg/l x sodium mg/l - 23 x sulfate mg/l x alkalinity - mg/l x bicarbonate alkalinity mg/l x carbonate alkalinity mg/l x <1.0 <2.0 <2.0 <2.0 <2.0 <4.0 <2.0 <2.0 <2.0 <2.0 total dissolved solids - mg/l 1, x Nitrogen Species ammonia as N mg/l - <0.01 x x < < <0.50 Kjeldahl nitrogen mg/l x <1.0 x x 1.1 x <1.0 nitrate as N mg/l 10 <0.05 x < <1.0 < nitrite mg/l - <0.05 x < <0.10 <0.1 <1.0 x x x x x total nitrogen - mg/l - x x x x x x x x x x x <1.0 Metals aluminum mg/l x <0.10 <0.03 <0.03 <0.03 <3.0 <3.0 x x x <0.02 antimony mg/l < <0.05 < (") <0.004 < <0.003 x x x x <0.001 arsenic mg/l <0.005 < < < <0.01 x x x x <0.006 barium mg/l x x x x beryllium mg/l < <0.003 < <0.001 <0.001 < <0.002 x x x x <0.003 boron mg/l 0.75 <0.01 x < <0.1 <0.5 x x x x <0.04 cadmium mg/l <0.005 < <0.001 <0.001 < <0.002 x x x x <0.002 chromium mg/l <0.005 < <0.002 < <0.01 x x x x <0.006 cobalt mg/l 0.05 <0.01 <0.01 <0.010 <0.001 < <0.03 x x x x <0.006 copper mg/l <0.01 < < <0.06 x x x x <0.006 iron mg/l x lead mg/l <0.005 < <0.002 < <0.01 x x x x <0.005 manganese mg/l 0.2 <0.005 x <0.03 <0.03 <0.03 <0.03 < mercury mg/l < < <0.07 <0.20 < <0.001 x x x x < molybdenum mg/l x < <0.010 <0.75 x x x x <0.008 nickel mg/l <0.005 < < <0.05 x x x x <0.01 selenium mg/l <0.01 < < <0.005 x x x x silver mg/l 0.05 <0.02 <0.005 < <0.002 <0.002 <0.010 <0.01 x x x x <0.005 thallium mg/l <0.01 <0.010 <0.003 < <0.001 x x x x <0.001 tin mg/l - x <0.01 x x x x x x x x x <0.1 uranium mg/l x < <0.002 <2.5 x x x x <0.001 vanadium mg/l - <0.05 <0.01 < <0.050 <0.08 x x x x <0.05 zinc mg/l <0.02 <0.020 <0.008 <0.008 <0.020 <0.05 x x x x <0.02 total organic carbon - mg/l x <1.0 <1.0 <1.0 phosphate mg/l - x x x x x x x x x x x <0.50 sulfide mg/l - x <1.0 x x x x x x x x x <1 cyanide mg/l 0.2 < < < <0.005 <0.01 <0.1 x x x x <0.005 perchlorate mg/l - x x x x x x x x x x x <0.001 total phenolics 1 - mg/l (^) < <0.005 <0.003 <0.003 <0.003 <0.003 < < Polychlorinated Biphenyls (PCBs) mg/l < (^^) (^^) (^^) (^^) (^^) (^^) x x x x (^^) Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,1-Trichloroethane mg/l 0.06 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2,2-Tetrachloroethane mg/l 0.01 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2-Trichloroethane mg/l < <0.001 <0.001 <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 < ,1-Dichloroethane mg/l < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l < <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 < ,1-Dichloropropene mg/l - x <0.001 <0.001 <0.001 x < x x x x x < ,2 Dibromo-3-chloropropane (DBCP) mg/l < < <0.001 < < < < < < < < < ,2,3-Trichlorobenzene mg/l - < x <0.001 x <0.001 < x x x x x x 1,2,3-Trichloropropane mg/l - < <0.001 <0.001 <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2,4-Trichlorobenzene mg/l - < <0.02 <0.001 x <0.001 < x x x x x < ,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 x <0.001 <0.001 <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2-Dichloroethane (EDC) mg/l < <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 < ,2-Dichloropropane mg/l < < <0.001 < <0.001 < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - < <0.001 <0.001 <0.001 <0.001 < x x x x x <0.01 1,3-Dichloropropane mg/l - < <0.001 <0.001 <0.001 <0.001 < x x x x x <0.01 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l < <0.001 <0.001 <0.001 <0.001 < <0.015 <0.015 <0.015 <0.015 <0.015 < ,2-Dichloropropane mg/l - < <0.001 <0.001 <0.001 <0.001 < x x x x x < Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.002 <0.01 <0.01 <0.01 <0.01 <0.025 <0.01 <0.01 <0.01 <0.01 <0.01 < Chlorotoluene mg/l - < x <0.001 x <0.001 < x x x x x x 2-Hexanone (Butyl Ketone) mg/l - <0.002 <0.01 <0.01 <0.01 <0.001 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 < Chlorotoluene mg/l - < x <0.001 x <0.001 < x x x x x x 4-Methyl-2-pentanone mg/l - <0.002 <0.01 <0.01 <0.01 <0.001 <0.025 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 Acetone mg/l <0.01 <0.01 <0.01 <0.01 <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Acrolein mg/l - x <0.005 <0.005 <0.005 x <0.025 x x x x x <0.1 Acrylonitrile mg/l - <0.002 <0.005 <0.005 <0.005 <0.005 <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 Benzene mg/l < <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x x x x x (#) Bromochloromethane mg/l - < <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.001 < <0.001 <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Carbon Disulfide mg/l - <0.002 <0.001 <0.001 <0.001 <0.001 <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Carbon Tetrachloride mg/l < <0.001 <0.001 <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Chlorobenzene mg/l 0.1 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Chloroethane mg/l - < <0.002 <0.001 < <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Chloromethane (methyl chloride) mg/l - < <0.001 <0.001 < <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x x x x x x x <0.001 cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 cis-1,3-dichloropropene mg/l - < <0.001 <0.001 <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dibromomethane (methylene bromide) mg/l - < <0.001 <0.001 <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dichlorodifluoromethane mg/l x x x x < Ethyl methacrylate mg/l - x x x x x x x x x x x <0.01 Ethylbenzene mg/l 0.7 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < <0.01 < < < < < < < < < Hexachlorobutadiene mg/l - < <0.001 <0.001 <0.001 <0.001 < x x x x x <0.001 Isobutyl alcohol mg/l - x x x x x x x x x x x <0.05 Isopropylbenzene mg/l - < x <0.001 x <0.001 < x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

24 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-1 Page 5 of 9 RESULTS FOR MW-1 11/6/01 4/3/02 7/12/02 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 - mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene - mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - x x x x x x x x x x x <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 x x x x x x x x x x x < <0.001 <0.001 < <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.001 x <0.001 < x x x x x x x x x x x x x x x x x <0.06 < x <0.001 < x <0.001 x <0.001 < x x x x x x < <0.001 <0.001 <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x <0.001 x <0.001 <0.005 x x x x x <0.001 < x <0.001 x <0.001 < x x x x x x <0.002 x x x x <0.010 x x x x x x < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < <0.001 <0.001 <0.002 <0.002 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.001 <0.001 <0.001 <0.001 <0.010 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < <0.001 <0.001 <0.001 < <0.001 <0.001 < <0.001 <0.001 < <0.001 <0.001 < <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.001 <0.001 <0.001 <0.001 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < < <0.001 < <0.001 < < < < < < < < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x < < <0.005 <0.01 x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x < < <0.010 <0.01 x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x <0.001 x <0.02 < < < <0.005 x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x < x <0.02 < < < <0.005 x x x x x < x <0.02 < < < <0.005 x x x x x <0.001 x <0.02 < < < <0.005 x x x x x < < x < < < <0.005 < x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x < x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.02 < < < <0.005 x x x x x <0.001 x <0.02 < < < <0.005 x x x x x <0.001 x x x x x x x x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x < x <0.02 < < < <0.005 x x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x < x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 < <0.02 < < < < <0.01 x x x x <0.001 x x x x x x x x x x x <0.001 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

25 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-1 Page 6 of 9 RESULTS FOR MW-1 11/6/01 4/3/02 7/12/02 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 n-nitrosodiethylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosodimethylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosodi-n-butylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosodinpropylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosodiphenylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosomethylethylamine mg/l - x x x x x x x x x x x <0.001 n-nitrosopiperidine mg/l - x x x x x x x x x x x <0.001 n-nitrosopyrrolidine mg/l - x x x x x x x x x x x <0.001 o-toluidine mg/l - x x x x x x x x x x x <0.001 p-(dimethylamino) azobenzene mg/l - x x x x x x x x x x x <0.001 Pentachlorobenzene mg/l - x x x x x x x x x x x <0.001 Pentachloronitrobenzene mg/l - x x x x x x x x x x x <0.001 Phenacetin mg/l - x x x x x x x x x x x <0.001 Phenanthrene mg/l - < <0.02 < < < <0.005 x x x x x <0.001 p-phenylenediamine mg/l - x x x x x x x x x x x <0.001 Pronamide mg/l - x x x x x x x x x x x <0.001 Pyrene mg/l - < <0.02 < < < <0.005 x x x x x <0.001 Pyridine mg/l - x x x x x x x x x x x <0.001 RDX mg/l - x x x x x x x x x x x < Safrole mg/l - x x x x x x x x x x x <0.001 sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x x x x < Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - x <0.02 x x x x x x x x x < ,4,5-Trichlorophenol mg/l - x <0.1 x x x x x x x x x < ,4,6-Trichlorophenol mg/l - x <0.02 x x x x x x x x x < ,4-Dichlorophenol mg/l - x <0.02 x x x x x x x x x < ,4-Dimethylphenol mg/l - x <0.02 x x x x x x x x x < ,4-Dinitrophenol mg/l - x <0.1 x x x x x x x x x < ,6-Dichlorophenol mg/l - x <0.02 x x x x x x x x x < Chlorophenol mg/l - x <0.02 x x x x x x x x x < Methylphenol (o-cresol) mg/l - x <0.02 x x x x x x x x x < Nitrophenol (o-nitrophenol) mg/l - x <0.02 x x x x x x x x x < Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x <0.02 x x x x x x x x x < ,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x <0.1 x x x x x x x x x <0.001 p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - x <0.02 x x x x x x x x x < Nitrophenol (p-nitrophenol) mg/l - x <0.1 x x x x x x x x x < Nitro-o-toluidine mg/l - x x x x x x x x x x x <0.001 Pentachlorophenol mg/l - x <0.1 x x x x x x x x x <0.001 Phenol 1 (a) mg/l x < x x x x x x x x x <0.001 Radium 226 and pci/l < Ra-226, total pci/l x <2.5 x x x x Ra-228 1, total pci/l x <2.5 x x x x -0.4 Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x < < x x x x x x x x < ,4'-DDE (p,p'-dde) mg/l - x < < x x x x x x x x < ,4'DDT (p,p'-ddt) mg/l - x < < x x x x x x x x < aldrin mg/l - x < < x x x x x x x x < alpha-bhc mg/l - x < < x x x x x x x x < alpha-chlordane mg/l - x < < x x x x x x x x x beta-bhc mg/l - x < < x x x x x x x x < Chlordane mg/l x x x x x x x x x x x < delta-bhc mg/l - x < < x x x x x x x x < Dieldrin mg/l - x < < x x x x x x x x < Endosulfan I (alpha-endosulfan) mg/l - x < < x x x x x x x x < Endosulfan II (beta-endosulfan) mg/l - x < < x x x x x x x x < Endosulfan sulfate mg/l - x < < x x x x x x x x < Endrin aldehyde mg/l - x < < x x x x x x x x < Endrin ketone mg/l - x < < x x x x x x x x x Endrin mg/l - x < < x x x x x x x x < gamma-bhc mg/l - x < < x x x x x x x x < gamma-chlordane mg/l - x < < x x x x x x x x x Heptachlor epoxide mg/l - x < < x x x x x x x x < Heptachlor mg/l - x < < x x x x x x x x < Isodrin mg/l - x x x x x x x x x x x <0.001 Kepone mg/l - x x x x x x x x x x x <0.001 Methoxychlor mg/l - x < < x x x x x x x x < Toxaphene mg/l - x <0.003 < x x x x x x x x <0.001 Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Arochlor mg/l - x < < < < < < x x x x < Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x x x x < ,4,5-T mg/l - x <0.002 x x x x x x x x x < ,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x <0.002 x x x x x x x x x < Dimethoate mg/l - x <0.002 x x x x x x x x x <0.001 Dinoseb mg/l - x <0.002 x x x x x x x x x < Disulfoton mg/l - x <0.002 x x x x x x x x x <0.001 Famphur mg/l - x <0.002 x x x x x x x x x <0.001 Methyl parathion mg/l - x <0.002 x x x x x x x x x <0.001 o,o,o-triethyl phosphorothioate mg/l - x <0.003 x x x x x x x x x <0.001 Parathion (Ethyl) mg/l - x <0.002 x x x x x x x x x <0.001 Phorate mg/l - x <0.002 x x x x x x x x x <0.001 Silvex mg/l - x <0.002 x x x x x x x x x < o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x x x x x x x x x x x < hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concen (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of an (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

26 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-1 Page 7 of 9 baseline standard RESULTS FOR MW-1 average deviation 12/29/09 12/29/10 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 5/11/99 to 5/11/99 to 5/18/00 5/18/00 Field Parameters water level elevation - ft amsl - 3, , , , , , , , , , , , conductivity - µs/cm ph - ph units temperature - deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l 1.6 x 0.52 x x x x x 0.45 x x x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity - mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <1.0 x total dissolved solids - mg/l 1, Nitrogen Species ammonia as N mg/l - <1.0 < <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < Kjeldahl nitrogen mg/l - x x x x x x x <1.0 x x x x nitrate as N mg/l 10 <0.1 < < <0.1 <0.1 < nitrite mg/l total nitrogen - mg/l - x x x x x x x <1.0 x x x x x x Metals aluminum mg/l 5.0 x <0.02 x x x x x <0.02 x x x x antimony mg/l <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x arsenic mg/l 0.01 <0.002 <0.001 < < <0.001 < <0.001 <0.005 <0.005 < barium mg/l beryllium mg/l x < <0.002 <0.002 <0.002 <0.003 <0.002 <0.003 <0.002 <0.002 <0.002 < x boron mg/l 0.75 x <0.04 x x x x x <0.04 x x x x cadmium mg/l <0.002 <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < chromium mg/l 0.05 <0.006 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < cobalt mg/l 0.05 <0.006 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < x copper mg/l 1.0 <0.006 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < iron mg/l lead mg/l 0.05 <0.005 < <0.001 <0.001 <0.005 <0.001 <0.005 < < < manganese mg/l mercury mg/l x < x x x x x < x x x x molybdenum mg/l 1.0 x x x x x x x <0.008 x x x x 0.00 x nickel mg/l 0.2 <0.01 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < selenium mg/l 0.05 <0.001 <0.001 < < <0.01 <0.005 <0.005 < silver mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.02 x thallium mg/l <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 < < < < tin mg/l - uranium mg/l 0.03 x x x x vanadium mg/l - <0.05 < <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < x zinc mg/l 10.0 <0.02 < <0.01 <0.01 <0.01 <0.02 <0.01 <0.02 <0.01 <0.01 < total organic carbon - mg/l < <1.0 <1.0 <1.0 < phosphate mg/l - x <0.5 x x x x x <0.50 x x x x x x sulfide mg/l - cyanide mg/l 0.2 x x x x x x x <0.01 x x x x x x perchlorate mg/l - total phenolics 1 - mg/l < < < < < < < < < < < x Polychlorinated Biphenyls (PCBs) mg/l x x x x x x x (^^) x x x x < x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1,2-Trichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1-Dichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < < < < < < x 1,2,3-Trichlorobenzene mg/l - < x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,2,4-Trichlorobenzene mg/l - < x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x 1,2-Dichloroethane (EDC) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,2-Dichloropropane mg/l < < < < < < < < < < < < < x 1,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 x x x x x x x x x x x < x 1,3-Dichloropropane mg/l - < x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 2,2-Dichloropropane mg/l - < x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x 2-Chlorotoluene mg/l - < x 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x 4-Chlorotoluene mg/l - < x 4-Methyl-2-pentanone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acrolein mg/l - Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Benzene mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 < < x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Dichlorodifluoromethane mg/l x Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < < < < < < < < < < < < x Hexachlorobutadiene mg/l - < x Isobutyl alcohol mg/l - Isopropylbenzene mg/l - < x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

27 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 - mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene - mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - APPEIX B Las Cruces Foothills Landfill MW-1 Page 8 of 9 baseline standard RESULTS FOR MW-1 average deviation 12/29/09 12/29/10 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 5/11/99 to 5/11/99 to 5/18/00 5/18/00 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x <0.001 <0.001 < <0.001 <0.001 <0.001 < < < < < < x < x < x < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.002 x < x <0.002 x <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x < < x <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x < < < < < < < < < < < < < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x x x x x x x x <0.002 x x x x x x x x x x x x x <0.002 x x x x x x x x x x x x x < x x x x < x x x x x x x x <0.002 x x x x < x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

28 Las Cruces Foothills Landfill monitoring well MW-1 constituent CAS Number unit GWPS date n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - 5-Nitro-o-toluidine mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and pci/l 5 Ra-226, total pci/l - Ra-228 1, total pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concen (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of an (#) Scanned for and not detected, breaks down almost immediately in water. APPEIX B Las Cruces Foothills Landfill MW-1 Page 9 of 9 baseline standard RESULTS FOR MW-1 average deviation 12/29/09 12/29/10 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 5/11/99 to 5/11/99 to 5/18/00 5/18/00 < x < x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x x x x x x x x < x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

29 Mr. James Dyer September 27, 2017 MW-2 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

30 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS RESULTS FOR MW-2 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 Page 1 of 9 Field Parameters water level elevation NA ft amsl conductivity NA µs/cm ph NA ph units temperature NA deg F Major Ions calcium mg/l x chloride mg/l x fluoride mg/l x magnesium mg/l x potassium mg/l x sodium mg/l x sulfate mg/l x alkalinity NA mg/l x bicarbonate alkalinity mg/l x carbonate alkalinity mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 x x x x x total dissolved solids NA mg/l 1, x Nitrogen Species ammonia as N mg/l <0.01 < <0.01 < <0.01 x Kjeldahl nitrogen mg/l < <0.01 x nitrate as N mg/l x nitrite mg/l <0.05 <0.05 <0.05 <0.05 < <0.05 x total nitrogen - mg/l - x x x x x x x x x x Metals aluminum mg/l <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x antimony mg/l < < < < < < < < <0.05 arsenic mg/l <0.005 barium mg/l beryllium mg/l < < < < < < < < <0.003 boron mg/l 0.75 < <0.01 x cadmium mg/l < < < < < < < <0.005 chromium mg/l 0.05 < < < <0.005 cobalt mg/l 0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 copper mg/l < <0.01 iron mg/l < < <0.01 x lead mg/l < <0.005 manganese mg/l < < <0.005 <0.005 x mercury mg/l < < < < < < < molybdenum mg/l 1.0 <0.05 <0.05 <0.05 <0.05 < x nickel mg/l <0.005 selenium mg/l <0.01 silver mg/l 0.05 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 < <0.02 <0.005 thallium mg/l < < < < <0.01 tin mg/l - x x x x x x x x x <0.01 uranium mg/l x vanadium mg/l - <0.05 < <0.05 < <0.05 <0.05 <0.05 <0.01 zinc mg/l < <0.01 < total organic carbon - mg/l <0.5 <0.5 < x phosphate mg/l - x x x x x x x x x x sulfide mg/l - x x x x x x x x x <1.0 cyanide mg/l 0.2 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.005 perchlorate mg/l - x x x x x x x x x x total phenolics 1 - mg/l <0.005 < < < (^) Polychlorinated Biphenyls (PCBs) mg/l < < < < < < < < (^^) Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 < < < < < < < < ,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 < < < < < < < < ,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 < < < < < < < < ,1,2-Trichloroethane mg/l <0.001 <0.001 < < < < < < < < ,1-Dichloroethane mg/l <0.001 <0.001 < < < < < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 < < < < < < < < ,1-Dichloropropene mg/l - x x x x x x x x x < ,2 Dibromo-3-chloropropane (DBCP) mg/l <0.01 <0.01 < < < < < < < < ,2,3-Trichlorobenzene mg/l - <0.001 <0.001 < < < < < < < x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 < < < < < < < < ,2,4-Trichlorobenzene mg/l - <0.001 <0.001 < < < < < < < <0.02 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 x x x x x x x x x < ,2-Dichloroethane (EDC) mg/l <0.001 <0.001 < < < < < < < < ,2-Dichloropropane mg/l <0.001 <0.001 < < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 <0.001 < < < < < < < < ,3-Dichloropropane mg/l - <0.001 <0.001 < < < < < < < < ,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 < < < < < < < < ,2-Dichloropropane mg/l - <0.001 <0.001 < < < < < < < < Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < Chlorotoluene mg/l - <0.001 <0.001 < < < < < < < x 2-Hexanone (Butyl Ketone) mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < Chlorotoluene mg/l - <0.001 <0.001 < < < < < < < x 4-Methyl-2-pentanone mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 Acetone mg/l - x x <0.01 <0.01 <0.01 <0.01 <0.01 < <0.01 Acrolein mg/l - x x x x x x x x x <0.005 Acrylonitrile mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 Benzene mg/l <0.001 <0.001 < < < < < < < <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x x x x Bromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 Bromomethane (methyl bromide) mg/l - <0.001 <0.001 < < < < < < < <0.002 Carbon Disulfide mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 Carbon Tetrachloride mg/l <0.001 <0.001 < < < < < < < <0.001 Chlorobenzene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 Chloroethane mg/l - <0.001 <0.001 < < < < < < < <0.002 Chloromethane (methyl chloride) mg/l - <0.001 <0.001 < < < < < < < <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x x x x x x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 < < < < <0.001 cis-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 < < < < < < < <0.001 Dichlorodifluoromethane mg/l Ethyl methacrylate mg/l - x x x x x x x x x x Ethylbenzene mg/l 0.7 <0.001 <0.001 < < < < < < < <0.001 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l <0.001 <0.001 < < < < < < < < Hexachlorobutadiene mg/l - <0.001 <0.001 < < < < < < < <0.001 Isobutyl alcohol mg/l - x x x x x x x x x x Isopropylbenzene mg/l - <0.001 <0.001 < < < < < < < x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

31 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS RESULTS FOR MW-2 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 Page 2 of 9 Methacrylonitrile mg/l - x x x x x x x x x x Methyl Iodide (Iodomethane) mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 Methyl methacrylate mg/l - x x x x x x x x x x Methylene Chloride mg/l <0.002 <0.002 < < < <0.001 n-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x Propionitrile mg/l - x x x x x x x x x x Propylbenzene mg/l - <0.001 <0.001 < < < < < < < x sec-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x Styrene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 < x tert-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Toluene mg/l 0.75 <0.001 < < < < < < < <0.001 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 < < < < < < < <0.002 trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 trans-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 trans-1,4-dichloro-2-butene mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 Trichloroethene (TCE) mg/l < < < <0.001 Trichlorofluoromethane mg/l - <0.001 <0.001 < < < <0.001 Vinyl acetate mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 Vinyl Chloride mg/l <0.001 <0.001 < < < < < < < < Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 Bromoform mg/l - <0.001 <0.001 < < < < < < < <0.001 Chloroform mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 Dibromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - x x x x x x x x x x 1,2-Diphenylhydrazine mg/l - x x x x x x x x x x 1,4-Naphthoquinone mg/l - x x x x x x x x x x 1-Chloronaphthalene NA mg/l - x x x x x x x x x x 1-Methylnaphthalene mg/l - x x x x x x x x x x 1-Naphthylamine mg/l - x x x x x x x x x x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - x x x x x x x x x x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - x x x x x x x x x x 2-Chloronaphthalene mg/l - x x x x x x x x x x 2-Methylnaphthalene mg/l - x x x x x x x x x x 2-Naphthylamine mg/l - x x x x x x x x x x 2-Nitroaniline (o-nitroaniline) mg/l - x x x x x x x x x x 2-Picoline mg/l - x x x x x x x x x x 3,3'-Dichlorobenzidine mg/l - x x x x x x x x x x 3,3'-Dimethylbenzidine mg/l - x x x x x x x x x x 3-Methylcholanthrene mg/l - x x x x x x x x x x 3-Nitroaniline (m-nitroaniline) mg/l - x x x x x x x x x x 4-Aminobiphenyl mg/l - x x x x x x x x x x 4-Bromophenylphenyl ether mg/l - x x x x x x x x x x 4-Chloroaniline (p-chloroanaline) mg/l - x x x x x x x x x x 4-Chlorophenylphenyl ether mg/l - x x x x x x x x x x 4-Nitroaniline (p-nitroaniline) mg/l - x x x x x x x x x x 7,12-Dimethylbenz (a) anthracene mg/l - x x x x x x x x x x Acenaphthene mg/l - x x x x x x x x x <0.02 Acenaphthylene mg/l - x x x x x x x x x <0.02 Acetophenone mg/l - x x x x x x x x x x alpha,alpha-dimethylphenethylamine mg/l - x x x x x x x x x x Aniline mg/l - x x x x x x x x x x Anthracene mg/l - x x x x x x x x x <0.02 Benzidine mg/l - x x x x x x x x x x Benzo (a) anthracene mg/l - x x x x x x x x x <0.02 Benzo (b) fluoranthene mg/l <0.1 <0.001 < < < < < < < <0.02 Benzo (g,h,i) perylene mg/l - x x x x x x x x x <0.02 Benzo (k) fluoranthene mg/l - x x x x x x x x x <0.02 Benzo[a]pyrene mg/l - x x x x x x x x x <0.02 Benzoic acid mg/l x x x x x <0.1 Benzyl alcohol mg/l - x x x x x x x x x x bis (2-Chloroethoxy) methane mg/l - x x x x x x x x x x bis (2-Chloroethyl) ether mg/l - x x x x x x x x x x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - x x x x x x x x x x bis (2-Ethylhexyl) phthalate mg/l - x x x x x x x x x x Butylbenzylphthalate mg/l - x x x x x x x x x x Carbazole mg/l - x x x x x x x x x x Chlorobenzilate mg/l - x x x x x x x x x x Chrysene mg/l - x x x x x x x x x <0.02 Diallate mg/l - x x x x x x x x x x Dibenz(a,j)acridine mg/l - x x x x x x x x x x Dibenzo (a,h) anthracene mg/l - x x x x x x x x x <0.02 Dibenzofuran mg/l - x x x x x x x x x x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x x Diethylphthalate mg/l - x x x x x x x x x x Dimethylphthalate mg/l - x x x x x x x x x x Di-n-butylphthalate mg/l - x x x x x x x x x x Di-n-octylphthalate mg/l - x x x x x x x x x x Diphenylamine mg/l - x x x x x x x x x x Ethyl methanesulfonate mg/l - x x x x x x x x x x Fluoranthene mg/l - x x x x x x x x x <0.02 Fluorene mg/l - x x x x x x x x x <0.02 Hexachlorobenzene mg/l - x x x x x x x x x x Hexachlorocyclopentadiene mg/l - x x x x x x x x x x Hexachloroethane mg/l - x x x x x x x x x x Hexachloropropene mg/l - x x x x x x x x x x HMX mg/l - x x x x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - x x x x x x x x x <0.02 Isophorone mg/l - x x x x x x x x x x Isosafrole mg/l - x x x x x x x x x x m-dinitrobenzene (1,3-DNB) mg/l - x x x x x x x x x x Methapyrilene mg/l - x x x x x x x x x x Methyl methanesulfonate mg/l - x x x x x x x x x x Naphthalene mg/l 0.03 <1.0 <0.001 <0.001 <0.001 <0.001 < < < < <0.02 Nitrobenzene mg/l - x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

32 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS RESULTS FOR MW-2 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 Page 3 of 9 n-nitrosodiethylamine mg/l - x x x x x x x x x x n-nitrosodimethylamine mg/l - x x x x x x x x x x n-nitrosodi-n-butylamine mg/l - x x x x x x x x x x n-nitrosodinpropylamine mg/l - x x x x x x x x x x n-nitrosodiphenylamine mg/l - x x x x x x x x x x n-nitrosomethylethylamine mg/l - x x x x x x x x x x n-nitrosopiperidine mg/l - x x x x x x x x x x n-nitrosopyrrolidine mg/l - x x x x x x x x x x o-toluidine mg/l - x x x x x x x x x x p-(dimethylamino) azobenzene mg/l - x x x x x x x x x x Pentachlorobenzene mg/l - x x x x x x x x x x Pentachloronitrobenzene mg/l - x x x x x x x x x x Phenacetin mg/l - x x x x x x x x x x Phenanthrene mg/l - <0.1 <0.001 < < < < < < < <0.02 p-phenylenediamine mg/l - x x x x x x x x x x Pronamide mg/l - x x x x x x x x x x Pyrene mg/l - <0.25 <0.001 < < < < < < < <0.02 Pyridine mg/l - x x x x x x x x x x RDX mg/l - x x x x x x x x x x Safrole mg/l - x x x x x x x x x x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x x x Semi Volatile Organic Compounds - Phenolics x 2,3,4,6-Tetrachlorophenol mg/l - x x x x x x x x x <0.02 2,4,5-Trichlorophenol mg/l - x x x x x x x x x <0.1 2,4,6-Trichlorophenol mg/l - x x x x x x x x x <0.02 2,4-Dichlorophenol mg/l - x x x x x x x x x <0.02 2,4-Dimethylphenol mg/l - x x x x x x x x x <0.02 2,4-Dinitrophenol mg/l - x x x x x x x x x <0.1 2,6-Dichlorophenol mg/l - x x x x x x x x x < Chlorophenol mg/l - x x x x x x x x x < Methylphenol (o-cresol) mg/l - x x x x x x x x x < Nitrophenol (o-nitrophenol) mg/l - x x x x x x x x x < Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x x x x x x x x x <0.02 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x x x x x x x x x <0.1 p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - x x x x x x x x x < Nitrophenol (p-nitrophenol) mg/l - x x x x x x x x x <0.1 5-Nitro-o-toluidine mg/l - x x x x x x x x x x Pentachlorophenol mg/l - x x x x x x x x x <0.1 Phenol 1 (a) mg/l x x x x x x x x x < Radium 226 and 228 NA pci/l Ra-226, total NA pci/l x Ra-228 1, total NA pci/l x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x x x x x x x x x < ,4'-DDE (p,p'-dde) mg/l - x x x x x x x x x < ,4'DDT (p,p'-ddt) mg/l - x x x x x x x x x < aldrin mg/l - x x x x x x x x x < alpha-bhc mg/l - x x x x x x x x x < alpha-chlordane mg/l - x x x x x x x x x < beta-bhc mg/l - x x x x x x x x x < Chlordane mg/l x x x x x x x x x x delta-bhc mg/l - x x x x x x x x x < Dieldrin mg/l - x x x x x x x x x < Endosulfan I (alpha-endosulfan) mg/l - x x x x x x x x x < Endosulfan II (beta-endosulfan) mg/l - x x x x x x x x x < Endosulfan sulfate mg/l - x x x x x x x x x < Endrin aldehyde mg/l - x x x x x x x x x < Endrin ketone mg/l - x x x x x x x x x < Endrin mg/l - x x x x x x x x x < gamma-bhc mg/l - x x x x x x x x x < gamma-chlordane mg/l - x x x x x x x x x < Heptachlor epoxide mg/l - x x x x x x x x x < Heptachlor mg/l - x x x x x x x x x < Isodrin mg/l - x x x x x x x x x x Kepone mg/l - x x x x x x x x x x Methoxychlor mg/l - x x x x x x x x x < Toxaphene mg/l - x x x x x x x x x <0.003 Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Arochlor mg/l - x x x x x x x x x < Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x x x 2,4,5-T mg/l - x x x x x x x x x < ,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x x <0.002 Dimethoate mg/l - x x x x x x x x x <0.002 Dinoseb mg/l - x x x x x x x x x <0.002 Disulfoton mg/l - x x x x x x x x x <0.002 Famphur mg/l - x x x x x x x x x <0.002 Methyl parathion mg/l - x x x x x x x x x <0.002 o,o,o-triethyl phosphorothioate mg/l - x x x x x x x x x <0.003 Parathion (Ethyl) mg/l - x x x x x x x x x <0.002 Phorate mg/l - x x x x x x x x x <0.002 Silvex mg/l - x x x x x x x x x <0.002 o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x x x x x x x x x x 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentrations. (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of antimony in the ground water sampled. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

33 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS date *no sampling of MW-2 on 7/15/03 because pump was not working 7/12/02 9/25/02 12/18/02 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 4 of 9 Field Parameters water level elevation NA ft amsl - conductivity NA µs/cm - ph NA ph units 6-9 temperature NA deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l - Acetone mg/l - Acrolein mg/l - Acrylonitrile mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l , x x x x 0.57 x <1.0 <2.0 <2.0 <2.0 <4.0 <2.0 <2.0 <2.0 <2.0 <2.0 < x <0.05 <0.05 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <1.0 < < <1.0 x x x x <1.0 x x < < <0.10 <0.1 <0.10 <1.0 x x x x x x x x x x x x x x x 1.7 x x <0.10 < <3.0 <3.0 x x x <0.02 x <0.02 < (") <0.004 <0.003 x x x x <0.001 <0.001 <0.001 < <0.004 <0.004 <0.01 x x x x x x x x < <0.001 <0.001 <0.002 x x x x <0.003 x <0.001 < <0.5 x x x x <0.04 x <0.04 < <0.001 <0.001 <0.002 x x x x <0.002 <0.002 <0.002 < < <0.01 x x x x <0.006 <0.006 <0.006 <0.010 <0.001 <0.001 <0.03 x x x x <0.006 <0.006 <0.006 <0.010 < <0.06 x x x x <0.006 <0.006 <0.006 < <0.10 <0.05 <0.05 <0.05 < < <0.01 x x x x <0.005 <0.005 <0.005 <0.010 < <0.03 <0.03 <0.03 <0.03 <0.03 <0.002 <0.002 <0.002 < <0.07 <0.20 <0.001 x x x x < x < < <0.75 x x x x <0.008 x <0.008 < < <0.05 x x x x <0.01 <0.01 <0.01 < <0.003 <0.005 x x x x <0.001 <0.001 < <0.002 <0.002 <0.01 x x x x <0.005 <0.005 <0.005 <0.010 <0.003 <0.003 <0.001 x x x x <0.001 <0.001 <0.001 x x x x x x x x <0.1 x x < <2.5 x x x x x x < <0.08 x x x x <0.05 <0.05 <0.05 <0.020 < <0.05 x x x x <0.02 <0.02 < < < <1.0 <1.0 <1.0 x x x x x x x x <0.50 x <0.50 x x x x x x x x 3 x x < <0.005 <0.005 <0.1 x x x x <0.005 x x < <0.003 <0.003 <0.003 <0.003 <0.003 < < < < (^^) (^^) (^^) (^^) x x x x (^^) x x <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x <0.005 x x <0.001 x < < < < < < < < < <0.001 x <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 x <0.001 x x x x x <0.001 x x <0.001 <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < < <0.001 <0.001 <0.001 x x x x x <0.01 <0.001 x <0.001 <0.001 <0.001 x x x x x <0.01 x x <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x <0.015 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 x <0.01 <0.01 <0.01 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.001 x <0.01 <0.01 <0.01 <0.04 <0.015 <0.015 <0.015 <0.015 <0.04 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.05 <0.005 x x x x x x <0.1 x x <0.05 <0.005 <0.005 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x (#) x x <0.001 <0.001 <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.001 <0.001 <0.001 <0.002 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 < x x x x < <0.001 x x x x x x x x <0.01 x x <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 x < < < < < < < < < <0.001 <0.001 <0.001 x x x x x <0.001 x x x x x x x x x x <0.05 x x <0.001 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

34 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS date *no sampling of MW-2 on 7/15/03 because pump was not working 7/12/02 9/25/02 12/18/02 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 5 of 9 Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l - Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz(a,j)acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - x x x x x x x x <0.005 x x <0.001 <0.005 <0.005 <0.001 <0.04 <0.04 <0.04 <0.04 <0.001 <0.01 <0.01 x x x x x x x x <0.03 x x <0.001 < <0.001 <0.015 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 x x x x x x x x x <0.06 x x <0.001 x <0.001 x <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 x <0.001 x x x x x <0.001 x x <0.001 x < x x x x x x x x x x x <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.002 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.002 <0.002 <0.001 <0.001 <0.001 <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.001 < < < < < < < < < < <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 x x x x x x x x x x x x < < <0.01 x x x x <0.001 x x x x x x x x x x < x x x < < <0.01 x x x x <0.001 x x < < < < x x x x < x x < < < x x x x x <0.001 x x < < < x x x x x <0.001 x x < < < x x x x x <0.001 x x < < < x x x x x <0.001 x x < < < x x x x x < x x < < < x x x x x < x x < < < x x x x x < x x x x x x x x x x x x x < < < x x x x x < x x x x x x x x x x x x x < < < x x x x x < x x x x x x x x x x x x x < < < x x x x x <0.001 x x < < < x x x x x <0.001 x x x x x x x x x x < x x x x x x x x x x < x x < < < x x x x x < x x x x x x x x x x < x x < < < <0.01 x x x x <0.001 x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

35 APPEIX B Las Cruces Foothills Landfill MW-2 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS date *no sampling of MW-2 on 7/15/03 because pump was not working 7/12/02 9/25/02 12/18/02 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 6 of 9 n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - < < < x x x x x <0.001 x x p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - < < < x x x x x <0.001 x x Pyridine mg/l - RDX mg/l - x x x x x x x x < x x Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x < x x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - 5-Nitro-o-toluidine mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l < Ra-226, total NA pci/l <2.5 x x x x 0.2 x x Ra-228 1, total NA pci/l <2.5 x x x x 0.04 x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - < x x x x x x x < x x 4,4'-DDE (p,p'-dde) mg/l - < x x x x x x x < x x 4,4'DDT (p,p'-ddt) mg/l - < x x x x x x x < x x aldrin mg/l - < x x x x x x x < x x alpha-bhc mg/l - < x x x x x x x < x x alpha-chlordane mg/l - < x x x x x x x x x x beta-bhc mg/l - < x x x x x x x < x x Chlordane mg/l x x x x x x x x < x x delta-bhc mg/l - < x x x x x x x < x x Dieldrin mg/l - < x x x x x x x < x x Endosulfan I (alpha-endosulfan) mg/l - < x x x x x x x < x x Endosulfan II (beta-endosulfan) mg/l - < x x x x x x x < x x Endosulfan sulfate mg/l - < x x x x x x x < x x Endrin aldehyde mg/l - < x x x x x x x < x x Endrin ketone mg/l - < x x x x x x x x x x Endrin mg/l - < x x x x x x x < x x gamma-bhc mg/l - < x x x x x x x < x x gamma-chlordane mg/l - < x x x x x x x x x x Heptachlor epoxide mg/l - < x x x x x x x < x x Heptachlor mg/l - < x x x x x x x < x x Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - < x x x x x x x < x x Toxaphene mg/l - < x x x x x x x <0.001 x x Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x < x x 2,4,5-T mg/l - x x x x x x x x < x x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x < x x Dimethoate mg/l - Dinoseb mg/l - x x x x x x x x < x x Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex mg/l - x x x x x x x x < x x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentr (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of ant (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

36 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS date Field Parameters water level elevation NA ft amsl - conductivity NA µs/cm - ph NA ph units 6-9 temperature NA deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l - Acetone mg/l - Acrolein mg/l - Acrylonitrile mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l - APPEIX B Las Cruces Foothills Landfill MW-2 Page 7 of 9 baseline standard RESULTS FOR MW-2 average deviation 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 1/12/99 to 1/12/99 to 5/18/00 5/18/ x x x x x 0.51 x x x x <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <1.0 x < <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < x x x x x <1.0 x x x x x x x x x x x x x x x x x x x 1.8 x x x x x x x x x x x x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.002 <0.002 <0.002 <0.003 <0.002 <0.003 <0.002 <0.002 < x x x x x x <0.04 x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.01 x <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < <0.02 < <0.02 <0.05 <0.02 <0.05 <0.02 < < <0.001 <0.001 <0.005 <0.001 <0.005 < < < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x x x x x < x x x x x x x x x <0.008 x x x x <0.05 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.02 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < x x x x x x x x x <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < x <0.01 <0.01 <0.02 <0.01 <0.02 <0.01 <0.01 < <1.0 < <1.0 <1.0 <1.0 <1.0 <1.0 < x x x x x <0.50 x x x x x x x x x x x <0.01 x x x x <0.02 x < < < < < < < < < < x x x x x (^^) x x x x < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x < < < < < < < < < < <0.01 x x x x x x x x x x x <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x < < < < < < < < < < <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x x x <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x x x x <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x < < <0.001 <0.001 < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x < < < < < < < < < < <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

37 Las Cruces Foothills Landfill monitoring well MW-2 constituent CAS Number unit GWPS date Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l - Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz(a,j)acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - APPEIX B Las Cruces Foothills Landfill MW-2 Page 8 of 9 baseline standard RESULTS FOR MW-2 average deviation 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 1/12/99 to 1/12/99 to 5/18/00 5/18/00 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < <0.002 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x <0.01 x x x x x x x x x x x <0.001 x x x x x x x x x x x <0.01 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x < <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x < < < < < < < < < < <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x <0.002 x x x x x x x x x x x <0.002 x x x x x x x x x x x x x x x x <0.1 x x x x x x < x x x x x x x x x x x x x x x x x x x x x <0.002 x x x x <1.0 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

38 (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of ant (#) Scanned for and not detected, breaks down almost immediately in water. APPEIX B Las Cruces Foothills Landfill MW-2 Page 9 of 9 Las Cruces Foothills Landfill monitoring well MW-2 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-2 average deviation date 12/27/11 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 12/27/16 6/27/17 1/12/99 to 1/12/99 to 5/18/00 5/18/00 n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - x x x x x x x x x x <0.1 x p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - x x x x x x x x x x <0.25 x Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - 5-Nitro-o-toluidine mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l Ra-226, total NA pci/l - x x x x x x x x x Ra-228 1, total NA pci/l - x x x x x x x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Arochlor mg/l - x x x x x < x x x x x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentr WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

39 Mr. James Dyer September 27, 2017 MW-3 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

40 APPEIX B Las Cruces Foothills Landfill MW-3 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS RESULTS FOR MW-3 date 1/12/99 5/15/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 1 of 9 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l x 27 chloride mg/l x 6.7 fluoride mg/l x 0.82 magnesium mg/l x 3.9 potassium mg/l x 1.8 sodium mg/l x 35 sulfate mg/l x 38 alkalinity NA mg/l x 110 bicarbonate alkalinity mg/l x 110 carbonate alkalinity mg/l - <1.0 <1.0 <1.0 < x 1 total dissolved solids NA mg/l 1, x 200 Nitrogen Species ammonia as N mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x Kjeldahl nitrogen mg/l < <0.1 < x <0.050 nitrate as N mg/l x 1.1 nitrite mg/l - x 0.33 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x <0.10 total nitrogen - mg/l - x x x x x x x x x x x Metals aluminum mg/l < < < x 0.27 antimony mg/l < < < < < <0.05 <0.050 arsenic mg/l <0.005 < barium mg/l beryllium mg/l < < < < < < < < <0.003 < boron mg/l < <0.01 x <0.10 cadmium mg/l < < < < < <0.005 < chromium mg/l cobalt mg/l 0.05 <0.01 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.010 copper mg/l < iron mg/l < < x 0.28 lead mg/l < < < manganese mg/l < < <0.005 <0.005 x <0.010 mercury mg/l < < < < < < < molybdenum mg/l 1.0 <0.05 <0.05 <0.05 <0.05 < x <0.010 nickel mg/l selenium mg/l <0.01 <0.01 silver mg/l 0.05 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 < <0.02 <0.005 < thallium mg/l < < < < < <0.01 <0.010 tin mg/l - x x x x x x x x x <0.01 x uranium mg/l x <0.02 vanadium mg/l - <0.05 < <0.05 < <0.05 <0.05 <0.05 <0.01 <0.010 zinc mg/l < total organic carbon - mg/l x 1 phosphate mg/l - x x x x x x x x x x x sulfide mg/l - x x x x x x x x x <1.0 x cyanide mg/l 0.2 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.005 < perchlorate mg/l - x x x x x x x x x x x total phenolics 1 - mg/l <0.005 <0.02 <0.003 <0.003 < (^) Polychlorinated Biphenyls (PCBs) mg/l < < < < < < < < < (^^) (^^) Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.005 <0.01 <0.01 1,1,1-Trichloroethane mg/l 0.02 <0.001 <0.001 < < < < < < < <0.001 < ,1,2,2-Tetrachloroethane mg/l 0.06 <0.001 <0.001 < < < < < < < <0.001 < ,1,2-Trichloroethane mg/l 0.01 <0.001 <0.001 < < < < < < < <0.001 < ,1-Dichloroethane mg/l <0.001 <0.001 < < < < < < < <0.001 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 < < < < < < < <0.001 < ,1-Dichloropropene mg/l <0.001 <0.001 < < < < < < < <0.001 < ,2 Dibromo-3-chloropropane (DBCP) mg/l - x x x x x x x x x <0.001 < ,2,3-Trichlorobenzene mg/l <0.01 <0.01 < < < < < < < < < ,2,3-Trichloropropane mg/l - <0.001 <0.001 < < < < < < < x < ,2,4-Trichlorobenzene mg/l 0.01 <0.001 <0.001 < < < < < < < <0.001 < ,2-Dichlorobenzene (o-dichlorobenzene) mg/l - <0.001 <0.001 < < < < < < < <0.02 < ,2-Dichloroethane (EDC) mg/l 0.6 x x x x x x x x x <0.001 < ,2-Dichloropropane mg/l <0.001 <0.001 < < < < < < < <0.001 < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l <0.001 <0.001 < < < < < < < < < ,3-Dichloropropane mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,4-Dichlorobenzene (p-dichlorobenzene) mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,2-Dichloropropane mg/l <0.001 <0.001 < < < < < < < <0.001 < Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.001 <0.001 < < < < < < < <0.001 < Chlorotoluene mg/l - <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 < Hexanone (Butyl Ketone) mg/l - <0.001 <0.001 < < < < < < < x < Chlorotoluene mg/l 0.02 x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 < Methyl-2-pentanone mg/l - <0.001 <0.001 < < < < < < < x <0.001 Acetone mg/l - x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.005 <0.01 <0.01 Acrolein mg/l - x x x x x x x x x <0.005 <0.005 Acrylonitrile mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 <0.005 Benzene mg/l <0.001 <0.001 < < < < < < < <0.001 <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x x x x x Bromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Bromomethane (methyl bromide) mg/l - <0.001 <0.001 < < < < < < < <0.002 <0.001 Carbon Disulfide mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Carbon Tetrachloride mg/l <0.001 <0.001 < < < < < < < <0.001 <0.001 Chlorobenzene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroethane mg/l - <0.001 <0.001 < < < < < < < <0.002 <0.001 Chloromethane (methyl chloride) mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x x x x x x x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 < < < < < < < <0.001 <0.001 cis-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Dichlorodifluoromethane mg/l <0.001 < < < < < < < <0.001 <0.001 Ethyl methacrylate mg/l - x x x x x x x x x x x Ethylbenzene mg/l 0.7 <0.001 <0.001 < < < < < < < <0.001 <0.001 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 <0.001 <0.001 < < < < < < < < <0.001 Hexachlorobutadiene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Isobutyl alcohol mg/l - x x x x x x x x x x x Isopropylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

41 APPEIX B Las Cruces Foothills Landfill MW-3 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS RESULTS FOR MW-3 date 1/12/99 5/15/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 2 of 9 Methacrylonitrile mg/l - x x x x x x x x x x x Methyl Iodide (Iodomethane) mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 <0.005 Methyl methacrylate mg/l - x x x x x x x x x x x Methylene Chloride mg/l <0.002 <0.002 < < < < < < < <0.001 <0.001 n-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Propionitrile mg/l - x x x x x x x x x x x Propylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 sec-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Styrene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x <0.001 tert-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Tetrachloroethene (PCE) mg/l <0.001 < < < < < < < < <0.001 Tetrahydrofuran (THF) mg/l - <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x x Toluene mg/l 0.75 <0.001 <0.001 < < < < < < < <0.001 <0.001 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,4-dichloro-2-butene mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Trichloroethene (TCE) mg/l <0.001 <0.001 < < < < < < < <0.001 <0.001 Trichlorofluoromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Vinyl acetate mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Vinyl Chloride mg/l <0.001 <0.001 < < < < < < < < <0.001 Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Bromoform mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroform mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 Dibromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - x x x x x x x x x x x 1,2-Diphenylhydrazine mg/l - x x x x x x x x x x x 1,4-Naphthoquinone mg/l - x x x x x x x x x x x 1-Chloronaphthalene NA mg/l - x x x x x x x x x x x 1-Methylnaphthalene mg/l - x x x x x x x x x x x 1-Naphthylamine mg/l - x x x x x x x x x x x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - x x x x x x x x x x x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - x x x x x x x x x x x 2-Chloronaphthalene mg/l - x x x x x x x x x x x 2-Methylnaphthalene mg/l - x x x x x x x x x x x 2-Naphthylamine mg/l - x x x x x x x x x x x 2-Nitroaniline (o-nitroaniline) mg/l - x x x x x x x x x x x 2-Picoline mg/l - x x x x x x x x x x x 3,3'-Dichlorobenzidine mg/l - x x x x x x x x x x x 3,3'-Dimethylbenzidine mg/l - x x x x x x x x x x x 3-Methylcholanthrene mg/l - x x x x x x x x x x x 3-Nitroaniline (m-nitroaniline) mg/l - x x x x x x x x x x x 4-Aminobiphenyl mg/l - x x x x x x x x x x x 4-Bromophenylphenyl ether mg/l - x x x x x x x x x x x 4-Chloroaniline (p-chloroanaline) mg/l - x x x x x x x x x x x 4-Chlorophenylphenyl ether mg/l - x x x x x x x x x x x 4-Nitroaniline (p-nitroaniline) mg/l - x x x x x x x x x x x 7,12-Dimethylbenz (a) anthracene mg/l - x x x x x x x x x x x Acenaphthene mg/l - x x x x x x x x x <0.02 < Acenaphthylene mg/l - x x x x x x x x x <0.02 < Acetophenone mg/l - x x x x x x x x x x x alpha,alpha-dimethylphenethylamine mg/l - x x x x x x x x x x x Aniline mg/l - x x x x x x x x x x x Anthracene mg/l - x x x x x x x x x <0.02 < Benzidine mg/l - x x x x x x x x x x x Benzo (a) anthracene mg/l - x x x x x x x x x <0.02 < Benzo (b) fluoranthene mg/l - x x x x x x x x x <0.02 < Benzo (g,h,i) perylene mg/l - x x x x x x x x x <0.02 < Benzo (k) fluoranthene mg/l - x x x x x x x x x <0.02 < Benzo[a]pyrene mg/l <0.001 < < < < < < < <0.02 < Benzoic acid mg/l - x x x x x x x x x x x Benzyl alcohol mg/l - x x x x x x x x x x x bis (2-Chloroethoxy) methane mg/l - x x x x x x x x x x x bis (2-Chloroethyl) ether mg/l - x x x x x x x x x x x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - x x x x x x x x x x x bis (2-Ethylhexyl) phthalate mg/l - x x x x x x x x x x x Butylbenzylphthalate mg/l - x x x x x x x x x x x Carbazole mg/l - x x x x x x x x x x x Chlorobenzilate mg/l - x x x x x x x x x x x Chrysene mg/l - x x x x x x x x x <0.02 < Diallate mg/l - x x x x x x x x x x x Dibenz(a,j)acridine mg/l - x x x x x x x x x x x Dibenzo (a,h) anthracene mg/l - x x x x x x x x x <0.02 < Dibenzofuran mg/l - x x x x x x x x x x x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x x x Diethylphthalate mg/l - x x x x x x x x x x x Dimethylphthalate mg/l - x x x x x x x x x x x Di-n-butylphthalate mg/l - x x x x x x x x x x x Di-n-octylphthalate mg/l - x x x x x x x x x x x Diphenylamine mg/l - x x x x x x x x x x x Ethyl methanesulfonate mg/l - x x x x x x x x x x x Fluoranthene mg/l - x x x x x x x x x <0.02 < Fluorene mg/l - x x x x x x x x x <0.02 < Hexachlorobenzene mg/l - x x x x x x x x x x x Hexachlorocyclopentadiene mg/l - x x x x x x x x x x x Hexachloroethane mg/l - x x x x x x x x x x x Hexachloropropene mg/l - x x x x x x x x x x x HMX mg/l - x x x x x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - x x x x x x x x x <0.02 < Isophorone mg/l - x x x x x x x x x x x Isosafrole mg/l - x x x x x x x x x x x m-dinitrobenzene (1,3-DNB) mg/l - x x x x x x x x x x x Methapyrilene mg/l - x x x x x x x x x x x Methyl methanesulfonate mg/l - x x x x x x x x x x x Naphthalene mg/l <0.001 <0.001 <0.001 <0.001 < < < < <0.02 < Nitrobenzene mg/l - x x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

42 APPEIX B Las Cruces Foothills Landfill MW-3 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS RESULTS FOR MW-3 date 1/12/99 5/15/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 3 of 9 n-nitrosodiethylamine mg/l - x x x x x x x x x x x n-nitrosodimethylamine mg/l - x x x x x x x x x x x n-nitrosodi-n-butylamine mg/l - x x x x x x x x x x x n-nitrosodinpropylamine mg/l - x x x x x x x x x x x n-nitrosodiphenylamine mg/l - x x x x x x x x x x x n-nitrosomethylethylamine mg/l - x x x x x x x x x x x n-nitrosopiperidine mg/l - x x x x x x x x x x x n-nitrosopyrrolidine mg/l - x x x x x x x x x x x o-toluidine mg/l - x x x x x x x x x x x p-(dimethylamino) azobenzene mg/l - x x x x x x x x x x x Pentachlorobenzene mg/l - x x x x x x x x x x x Pentachloronitrobenzene mg/l - x x x x x x x x x x x Phenacetin mg/l - x x x x x x x x x x x Phenanthrene mg/l <0.001 < < < < < < < <0.02 < p-phenylenediamine mg/l - x x x x x x x x x x x Pronamide mg/l - x x x x x x x x x x x Pyrene mg/l <0.001 < < < < < < < <0.02 < Pyridine mg/l - x x x x x x x x x x x RDX mg/l - x x x x x x x x x x x Safrole mg/l - x x x x x x x x x x x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x x x x Semi Volatile Organic Compounds - Phenolics x 2,3,4,6-Tetrachlorophenol mg/l - x x x x x x x x x <0.02 x 2,4,5-Trichlorophenol mg/l - x x x x x x x x x <0.1 x 2,4,6-Trichlorophenol mg/l - x x x x x x x x x <0.02 x 2,4-Dichlorophenol mg/l - x x x x x x x x x <0.02 x 2,4-Dimethylphenol mg/l - x x x x x x x x x <0.02 x 2,4-Dinitrophenol mg/l - x x x x x x x x x <0.1 x 2,6-Dichlorophenol mg/l - x x x x x x x x x <0.02 x 2-Chlorophenol mg/l - x x x x x x x x x <0.02 x 2-Methylphenol (o-cresol) mg/l - x x x x x x x x x <0.02 x 2-Nitrophenol (o-nitrophenol) mg/l - x x x x x x x x x <0.02 x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x x x x x x x x x <0.02 x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x x x x x x x x x <0.1 x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - x x x x x x x x x <0.02 x 4-Nitrophenol (p-nitrophenol) mg/l - x x x x x x x x x <0.1 x 5-Nitro-o-toluidine mg/l - x x x x x x x x x x x Pentachlorophenol mg/l - x x x x x x x x x <0.1 x Phenol 1 (a) mg/l x x x x x x x x x < x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l x Ra-228 1, total NA pci/l x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x x x x x x x x x < < ,4'-DDE (p,p'-dde) mg/l - x x x x x x x x x < < ,4'DDT (p,p'-ddt) mg/l - x x x x x x x x x < < aldrin mg/l - x x x x x x x x x < < alpha-bhc mg/l - x x x x x x x x x < < alpha-chlordane mg/l - x x x x x x x x x < < beta-bhc mg/l - x x x x x x x x x < < Chlordane mg/l x x x x x x x x x x x delta-bhc mg/l - x x x x x x x x x < < Dieldrin mg/l - x x x x x x x x x < < Endosulfan I (alpha-endosulfan) mg/l - x x x x x x x x x < < Endosulfan II (beta-endosulfan) mg/l - x x x x x x x x x < < Endosulfan sulfate mg/l - x x x x x x x x x < < Endrin aldehyde mg/l - x x x x x x x x x < < Endrin ketone mg/l - x x x x x x x x x < < Endrin mg/l - x x x x x x x x x < < gamma-bhc mg/l - x x x x x x x x x < < gamma-chlordane mg/l - x x x x x x x x x < < Heptachlor epoxide mg/l - x x x x x x x x x < < Heptachlor mg/l - x x x x x x x x x < < Isodrin mg/l - x x x x x x x x x x x Kepone mg/l - x x x x x x x x x x x Methoxychlor mg/l - x x x x x x x x x < < Toxaphene mg/l - x x x x x x x x x <0.003 < Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Other Pesticides and Herbicides 1 x x x x x x x 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x x x x 2,4,5-T mg/l - x x x x x x x x x <0.002 x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x x <0.002 x Dimethoate mg/l - x x x x x x x x x <0.002 x Dinoseb mg/l - x x x x x x x x x <0.002 x Disulfoton mg/l - x x x x x x x x x <0.002 x Famphur mg/l - x x x x x x x x x <0.002 x Methyl parathion mg/l - x x x x x x x x x <0.002 x o,o,o-triethyl phosphorothioate mg/l - x x x x x x x x x <0.003 x Parathion (Ethyl) mg/l - x x x x x x x x x <0.002 x Phorate mg/l - x x x x x x x x x <0.002 x Silvex mg/l - x x x x x x x x x <0.002 x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x x x x x x x x x x x 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentrations. (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of antimony in the ground water sampled. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

43 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-3 RESULTS FOR MW-3 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 4 of 9 Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l ,2 Dibromo-3-chloropropane (DBCP) mg/l - 1,2,3-Trichlorobenzene mg/l ,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l ,2-Dichlorobenzene (o-dichlorobenzene) mg/l - 1,2-Dichloroethane (EDC) mg/l 0.6 1,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l ,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l - 2,2-Dichloropropane mg/l Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l Methyl-2-pentanone mg/l - Acetone mg/l - Acrolein mg/l - Acrylonitrile mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l pumped dry x x x x 0.76 x x x <20 <2.0 <4.0 < <2.0 < <0.05 <0.05 <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.50 <1.0 <1.0 <0.5 <0.5 <1 <1.0 x x x x <1.0 x x <1.0 < <0.1 <0.1 < x x x x x x x x x x x x x x x <1.0 x x <3.0 <3.0 x x x 0.04 x (") <0.004 < <0.003 x x x x <0.001 <0.001 <0.001 <0.004 < <0.01 x x x x <0.02 x x x x <0.001 <0.001 < <0.002 x x x x <0.003 x < <0.1 <0.5 x x x x <0.04 x x <0.001 < <0.002 x x x x <0.002 <0.002 < <0.01 x x x x <0.001 < <0.03 x x x x <0.006 <0.006 < <0.06 x x x x <0.10 < < <0.01 x x x x <0.005 <0.005 < <0.010 <0.03 <0.03 <0.03 <0.03 < <0.07 <0.2 < <0.001 x x x x < x < <0.010 <0.75 x x x x <0.008 x < <0.05 x x x x <0.003 < <0.005 x x x x <0.001 <0.001 <0.001 <0.002 <0.002 <0.010 <0.01 x x x x <0.005 < <0.005 <0.003 < <0.001 x x x x <0.001 <0.001 <0.001 x x x x x x x x <0.1 x x <2.5 x x x x x x <0.050 <0.08 x x x x <0.05 <0.050 < x x x x <1.0 1 <0.5 <0.5 <0.5 <0.5 <1.0 <1.0 <1.0 <1.0 x x x x x x x x <0.50 x <0.50 x x x x x x x x 3 x x <0.005 <0.005 <0.01 <0.1 x x x x <0.005 x x <0.003 <0.005 <0.003 <0.003 <0.003 <0.003 < < < < x (^^) (^^) (^^) x x x x (^^) x x <0.01 <0.01 <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.001 x x x x <0.005 x x <0.001 x < < < < < < < < < < < <0.010 x x x x x x x x x <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 < x x x x x <0.001 x x x <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 x < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < < < < x x x x x <0.01 <0.001 x <0.001 <0.001 < x x x x x <0.01 x x <0.001 <0.001 < <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 < x x x x x <0.015 x x <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.01 <0.01 <0.025 x x x x x x x x x <0.001 < <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 <0.025 x x x x x x x x x <0.001 < <0.04 <0.15 <0.15 <0.15 <0.15 <0.04 <0.01 <0.01 <0.01 <0.01 <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.005 x <0.025 x x x x x <0.1 x x <0.005 <0.005 <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.01 <0.01 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x (#) x x <0.001 <0.001 <0.002 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.001 <0.001 <0.001 <0.002 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.002 <0.001 <0.001 <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 < <0.005 x <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 x x x x x x x x <0.01 x x <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 < < < < < < < < < < < <0.001 <0.001 < x x x x x <0.001 x x x x x x x x x x <0.05 x x x <0.001 < x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

44 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-3 RESULTS FOR MW-3 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 5 of 9 Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l Benzoic acid mg/l - Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz(a,j)acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - x x x x x x x x <0.005 x x <0.005 <0.005 <0.005 <0.001 <0.04 <0.04 <0.04 <0.04 <0.001 <0.01 <0.01 x x x x x x x x <0.03 x x <0.001 <0.001 < <0.015 <0.001 <0.001 <0.001 <0.001 <0.015 <0.001 <0.001 x <0.001 < x x x x x x x x x x x x x x x x <0.06 x x x <0.001 < x x x x x x x x x <0.001 < x x x x x x x x <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 x <0.001 <0.005 x x x x x <0.001 x x x <0.001 < x x x x x x x x < < < < < < < < < < < x x <0.010 x x x x x x x x <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.002 <0.002 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.002 <0.002 <0.001 <0.001 < <0.005 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.010 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 < < < < < < < < < < < <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 x x x x x x x x x x x < < <0.005 <0.01 x x x x <0.001 x x x x x x x x x x < x x < < <0.010 <0.01 x x x x <0.001 x x < < <0.005 < x x x x < x x < < <0.005 x x x x x <0.001 x x < < <0.005 x x x x x <0.001 x x < < <0.005 x x x x x <0.001 x x < < <0.005 x x x x x < x x < < <0.005 x x x x x < x x < < <0.005 x x x x x < x x < < <0.005 x x x x x <0.001 x x x x x x x x x x x x x < < <0.005 x x x x x < x x x x x x x x x x x x x < < <0.005 x x x x x < x x x x x x x x x x x x x < < <0.005 x x x x x <0.001 x x < < <0.005 x x x x x <0.001 x x x x x x x x x x < x x x x x x x x x x < x x < < <0.005 x x x x x < x x x x x x x x x x < x x < < < <0.01 x x x x <0.001 x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

45 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-3 RESULTS FOR MW-3 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 Page 6 of 9 n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - < < <0.005 x x x x x <0.001 x x p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - < < <0.005 x x x x x <0.001 x x Pyridine mg/l - RDX mg/l - x x x x x x x x < x x Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x < x x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - 5-Nitro-o-toluidine mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l < Ra-226, total NA pci/l <2.5 x x x x 0.03 x x Ra-228 1, total NA pci/l <2.5 x x x x 0.32 x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x x x x x x x x < x x 4,4'-DDE (p,p'-dde) mg/l - x x x x x x x x < x x 4,4'DDT (p,p'-ddt) mg/l - x x x x x x x x < x x aldrin mg/l - x x x x x x x x < x x alpha-bhc mg/l - x x x x x x x x < x x alpha-chlordane mg/l - x x x x x x x x x x x beta-bhc mg/l - x x x x x x x x < x x Chlordane mg/l x x x x x x x x < x x delta-bhc mg/l - x x x x x x x x < x x Dieldrin mg/l - x x x x x x x x < x x Endosulfan I (alpha-endosulfan) mg/l - x x x x x x x x < x x Endosulfan II (beta-endosulfan) mg/l - x x x x x x x x < x x Endosulfan sulfate mg/l - x x x x x x x x < x x Endrin aldehyde mg/l - x x x x x x x x < x x Endrin ketone mg/l - x x x x x x x x x x x Endrin mg/l - x x x x x x x x < x x gamma-bhc mg/l - x x x x x x x x < x x gamma-chlordane mg/l - x x x x x x x x x x x Heptachlor epoxide mg/l - x x x x x x x x < x x Heptachlor mg/l - x x x x x x x x < x x Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - x x x x x x x x < x x Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Arochlor mg/l - < < < < x x x x < x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x < x x 2,4,5-T mg/l - x x x x x x x x < x x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x < x x Dimethoate mg/l - Dinoseb mg/l - x x x x x x x x < x x Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex mg/l - x x x x x x x x < x x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics conc (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

46 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS date Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l ,2 Dibromo-3-chloropropane (DBCP) mg/l - 1,2,3-Trichlorobenzene mg/l ,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l ,2-Dichlorobenzene (o-dichlorobenzene) mg/l - 1,2-Dichloroethane (EDC) mg/l 0.6 1,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l ,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l - 2,2-Dichloropropane mg/l Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l Methyl-2-pentanone mg/l - Acetone mg/l - Acrolein mg/l - Acrylonitrile mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l - APPEIX B Las Cruces Foothills Landfill MW-3 Page 7 of 9 baseline standard RESULTS FOR MW-3 average deviation 5/18/11 12/27/11 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 1/12/99 to 1/12/99 to 5/18/00 5/18/ x x x x x x x x x 0.76 x x x x x x x x x x <2.0 <2.0 < < <2.0 <2.0 < x x x <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < x x x x x x x <1.0 x x x x < x x x x x x x x x x x 0.33 x x x x x x x x 1.0 x x x x x x x x x x x x <0.02 x x x x < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x x < < x <0.002 <0.002 <0.002 <0.002 <0.003 <0.002 <0.003 <0.002 < x x x x x x x x <0.04 x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < x <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < x x < x <0.02 <0.02 < <0.02 <0.05 <0.02 <0.05 <0.02 < x < < < x < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x x x x x x x < x x x x x x x x x x <0.008 x x x <0.05 x x < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < x < <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.02 x x < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < x x x x x x x x x x x x < <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < x x x 0.26 < <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < x x x x x x x <0.50 x x x x x x x x x x x x x <0.01 x x x <0.02 x x x x x x x x x x x x x < < < < < < < < < < x x x x x x x x (^^) x x x < x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x <0.001 x x < < < < < < < < < < x x x x x x x x x x x x x <0.01 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x < < < < < < < < < < <0.001 x x x x x x x x x x x x <0.001 x x x x x x x x x x x x <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x <0.001 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 x x x x x x x x x x x x <0.01 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 x x x x x x x x x x x x <0.002 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x < < < < < < < < < < <0.001 x x x x x x x x x x x x <0.001 x x x x x x x x x x x x x <0.001 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

47 Las Cruces Foothills Landfill monitoring well MW-3 constituent CAS Number unit GWPS date Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l Benzoic acid mg/l - Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz(a,j)acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - APPEIX B Las Cruces Foothills Landfill MW-3 Page 8 of 9 baseline standard RESULTS FOR MW-3 average deviation 5/18/11 12/27/11 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 1/12/99 to 1/12/99 to 5/18/00 5/18/00 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < <0.002 x x x x x x x x x x x x <0.001 x x x x x x x x x x x x x <0.001 x x x x x x x x x x x x <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x <0.01 x x x x x x x x x x x x <0.001 x x < < < < < < < < < < x x x x x x x x x x x x <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.002 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x x < < < < < < < < < < <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x <0.002 x x x x x x < < < x x x x x x x x <0.002 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x < x x x < x x x x x x x x x <0.002 x x x x < WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

48 APPEIX B Las Cruces Foothills Landfill MW-3 Page 9 of 9 Las Cruces Foothills Landfill monitoring well MW-3 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-3 average deviation date 5/18/11 12/27/11 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 1/12/99 to 1/12/99 to 5/18/00 5/18/00 n-nitrosodiethylamine mg/l - x n-nitrosodimethylamine mg/l - x n-nitrosodi-n-butylamine mg/l - x n-nitrosodinpropylamine mg/l - x n-nitrosodiphenylamine mg/l - x n-nitrosomethylethylamine mg/l - x n-nitrosopiperidine mg/l - x n-nitrosopyrrolidine mg/l - x o-toluidine mg/l - x p-(dimethylamino) azobenzene mg/l - x Pentachlorobenzene mg/l - x Pentachloronitrobenzene mg/l - x Phenacetin mg/l - x Phenanthrene mg/l - x x x x x x x x x x x x p-phenylenediamine mg/l - x Pronamide mg/l - x Pyrene mg/l - x x x x x x x x x x x x Pyridine mg/l - x RDX mg/l - < Safrole mg/l - x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - < Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - x 2,4,5-Trichlorophenol mg/l - x 2,4,6-Trichlorophenol mg/l - x 2,4-Dichlorophenol mg/l - x 2,4-Dimethylphenol mg/l - x 2,4-Dinitrophenol mg/l - x 2,6-Dichlorophenol mg/l - x 2-Chlorophenol mg/l - x 2-Methylphenol (o-cresol) mg/l - x 2-Nitrophenol (o-nitrophenol) mg/l - x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - x 4-Nitrophenol (p-nitrophenol) mg/l - x 5-Nitro-o-toluidine mg/l - x Pentachlorophenol mg/l - x Phenol 1 (a) mg/l x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l - x x x x x x x x x x Ra-228 1, total NA pci/l - x x x x x x x x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x 4,4'-DDE (p,p'-dde) mg/l - x 4,4'DDT (p,p'-ddt) mg/l - x aldrin mg/l - x alpha-bhc mg/l - x alpha-chlordane mg/l - x beta-bhc mg/l - x Chlordane mg/l x delta-bhc mg/l - x Dieldrin mg/l - x Endosulfan I (alpha-endosulfan) mg/l - x Endosulfan II (beta-endosulfan) mg/l - x Endosulfan sulfate mg/l - x Endrin aldehyde mg/l - x Endrin ketone mg/l - x Endrin mg/l - x gamma-bhc mg/l - x gamma-chlordane mg/l - x Heptachlor epoxide mg/l - x Heptachlor mg/l - x Isodrin mg/l - x Kepone mg/l - x Methoxychlor mg/l - x Toxaphene mg/l - x Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Arochlor mg/l - x x x x x x x < x x x x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x 2,4,5-T mg/l - x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x Dimethoate mg/l - x Dinoseb mg/l - x Disulfoton mg/l - x Famphur mg/l - x Methyl parathion mg/l - x o,o,o-triethyl phosphorothioate mg/l - x Parathion (Ethyl) mg/l - x Phorate mg/l - x Silvex mg/l - x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics conc (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

49 Mr. James Dyer September 27, 2017 MW-4 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

50 APPEIX B Las Cruces Foothills Landfill MW-4 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS RESULTS FOR MW-4 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 1 of 9 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l x 69 chloride mg/l x 7.2 fluoride mg/l x 0.47 magnesium mg/l x 8.9 potassium mg/l x 2.5 sodium mg/l x 30 sulfate mg/l x 35 alkalinity NA mg/l x 230 bicarbonate alkalinity mg/l x 230 carbonate alkalinity mg/l - <1.0 <1.0 <1.0 <1.0 < x 1 total dissolved solids NA mg/l 1, x 320 Nitrogen Species ammonia as N mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x Kjeldahl nitrogen mg/l - <0.1 <0.1 <0.1 <0.1 < <0.1 <0.1 <0.1 x <0.050 nitrate as N mg/l x 1.1 nitrite mg/l <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x <0.10 total nitrogen - mg/l - x x x x x x x x x x x Metals aluminum mg/l 5.0 <0.05 <0.05 <0.05 < <0.05 <0.05 <0.05 <0.05 x <0.10 antimony mg/l < < < < < < < < < <0.05 <0.050 arsenic mg/l <0.005 < barium mg/l beryllium mg/l < < < < < < < < < <0.003 < boron mg/l 0.75 < < <0.01 x <0.10 cadmium mg/l < < < < < < < < < <0.005 < chromium mg/l 0.05 < < < <0.005 < cobalt mg/l 0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.010 copper mg/l < < < < < <0.01 <0.010 iron mg/l 1.0 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 x <0.10 lead mg/l < < < < < <0.005 < manganese mg/l 0.2 < <0.02 < < <0.005 <0.005 x <0.010 mercury mg/l < < < < < < < < < molybdenum mg/l 1.0 <0.05 <0.05 <0.05 <0.05 < x <0.010 nickel mg/l <0.005 < selenium mg/l < <0.001 <0.01 <0.010 silver mg/l 0.05 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 < <0.02 <0.005 < thallium mg/l < < < < < < < < <0.01 <0.02 tin mg/l - x x x x x x x x x <0.01 x uranium mg/l x <0.02 vanadium mg/l - <0.05 < <0.05 < <0.05 <0.05 <0.05 <0.01 <0.010 zinc mg/l 10.0 <0.01 <0.01 <0.01 <0.01 < <0.01 <0.01 <0.01 <0.02 <0.020 total organic carbon - mg/l - < < < x 1.1 phosphate mg/l - x x x x x x x x x x x sulfide mg/l - x x x x x x x x x <1.0 x cyanide mg/l 0.2 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.005 < perchlorate mg/l - x x x x x x x x x x x total phenolics 1 - mg/l <0.005 <0.02 <0.003 < < (^) Polychlorinated Biphenyls (PCBs) mg/l < < < < < < < < (^^) (^^) Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 < < < < < < < <0.001 < ,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 < < < < < < < <0.001 < ,1,2-Trichloroethane mg/l <0.001 <0.001 < < < < < < < <0.001 < ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE mg/l < < < < < < < < < <0.001 < ,1-Dichloropropene mg/l - x x x x x x x x x <0.001 < ,2 Dibromo-3-chloropropane (DBCP) mg/l <0.01 <0.01 < < < < < < < x < ,2,3-Trichlorobenzene mg/l - <0.001 <0.001 < < < < < < < x < ,2,3-Trichloropropane mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,2,4-Trichlorobenzene mg/l - <0.001 <0.001 < < < < < < < <0.02 < ,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 x x x x x x x x x <0.001 < ,2-Dichloroethane (EDC) mg/l <0.001 <0.001 < < < < < < < <0.001 < ,2-Dichloropropane mg/l <0.001 <0.001 < < < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,3-Dichloropropane mg/l - <0.001 <0.001 < < < < < < < <0.001 < ,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 < < < < < < < <0.001 < ,2-Dichloropropane mg/l - <0.001 <0.001 < < < < < < < <0.001 < Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 < Chlorotoluene mg/l - <0.001 <0.001 < < < < < < < x < Hexanone (Butyl Ketone) mg/l - x x x x x x x x x x x 4-Chlorotoluene mg/l - <0.001 <0.001 < < < < < < < x < Methyl-2-pentanone mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 <0.01 Acetone mg/l - x x <0.01 <0.01 <0.01 <0.01 <0.01 < <0.01 <0.01 Acrolein mg/l - x x x x x x x x x <0.005 <0.005 Acrylonitrile mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 <0.005 Benzene mg/l <0.001 <0.001 < < < < < < < <0.001 <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x x x x x Bromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Bromomethane (methyl bromide) mg/l - <0.001 <0.001 < < < < < < < <0.002 <0.001 Carbon Disulfide mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Carbon Tetrachloride mg/l <0.001 <0.001 < < < < < < < <0.001 <0.001 Chlorobenzene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroethane mg/l - <0.001 <0.001 < < < < < < < <0.002 <0.001 Chloromethane (methyl chloride) mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x x x x x x x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 < < < < < < < <0.001 <0.001 cis-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Dichlorodifluoromethane mg/l < Ethyl methacrylate mg/l - x x x x x x x x x x x Ethylbenzene mg/l 0.7 <0.001 <0.001 < < < < < < < <0.001 <0.001 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 <0.001 <0.001 < < < < < < < x <0.001 Hexachlorobutadiene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Isobutyl alcohol mg/l - x x x x x x x x x x x Isopropylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

51 APPEIX B Las Cruces Foothills Landfill MW-4 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS RESULTS FOR MW-4 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 2 of 9 Methacrylonitrile mg/l - x x x x x x x x x x x Methyl Iodide (Iodomethane) mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 <0.005 Methyl methacrylate mg/l - x x x x x x x x x x x Methylene Chloride mg/l <0.002 <0.002 < < < < n-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Propionitrile mg/l - x x x x x x x x x x x Propylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 sec-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Styrene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x <0.001 tert-butylbenzene mg/l - <0.001 <0.001 < < < < < < < x <0.001 Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x x Toluene mg/l 0.75 <0.001 <0.001 < < < < < < <0.001 <0.001 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,3-dichloropropene mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 trans-1,4-dichloro-2-butene mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l < Vinyl acetate mg/l - x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 Vinyl Chloride mg/l <0.001 <0.001 < < < < < < < < <0.001 Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Bromoform mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Chloroform mg/l 0.1 <0.001 <0.001 < < < < < < < <0.001 <0.001 Dibromochloromethane mg/l - <0.001 <0.001 < < < < < < < <0.001 <0.001 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - x x x x x x x x x x x 1,2-Diphenylhydrazine mg/l - x x x x x x x x x x x 1,4-Naphthoquinone mg/l - x x x x x x x x x x x 1-Chloronaphthalene NA mg/l - x x x x x x x x x x x 1-Methylnaphthalene mg/l - x x x x x x x x x x x 1-Naphthylamine mg/l - x x x x x x x x x x x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - x x x x x x x x x x x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - x x x x x x x x x x x 2-Chloronaphthalene mg/l - x x x x x x x x x x x 2-Methylnaphthalene mg/l - x x x x x x x x x x x 2-Naphthylamine mg/l - x x x x x x x x x x x 2-Nitroaniline (o-nitroaniline) mg/l - x x x x x x x x x x x 2-Picoline mg/l - x x x x x x x x x x x 3,3'-Dichlorobenzidine mg/l - x x x x x x x x x x x 3,3'-Dimethylbenzidine mg/l - x x x x x x x x x x x 3-Methylcholanthrene mg/l - x x x x x x x x x x x 3-Nitroaniline (m-nitroaniline) mg/l - x x x x x x x x x x x 4-Aminobiphenyl mg/l - x x x x x x x x x x x 4-Bromophenylphenyl ether mg/l - x x x x x x x x x x x 4-Chloroaniline (p-chloroanaline) mg/l - x x x x x x x x x x x 4-Chlorophenylphenyl ether mg/l - x x x x x x x x x x x 4-Nitroaniline (p-nitroaniline) mg/l - x x x x x x x x x x x 7,12-Dimethylbenz (a) anthracene mg/l - x x x x x x x x x x x Acenaphthene mg/l - x x x x x x x x x <0.02 < Acenaphthylene mg/l - x x x x x x x x x <0.02 < Acetophenone mg/l - x x x x x x x x x x x alpha,alpha-dimethylphenethylamine mg/l - x x x x x x x x x x x Aniline mg/l - x x x x x x x x x x x Anthracene mg/l - x x x x x x x x x <0.02 < Benzidine mg/l - x x x x x x x x x x x Benzo (a) anthracene mg/l - x x x x x x x x x <0.02 < Benzo (b) fluoranthene mg/l - x x x x x x x x x <0.02 < Benzo (g,h,i) perylene mg/l - x x x x x x x x x <0.02 < Benzo (k) fluoranthene mg/l - x x x x x x x x x <0.02 < Benzo[a]pyrene mg/l <0.1 <0.001 < < < < < < < <0.02 < Benzoic acid mg/l x x x x x x x Benzyl alcohol mg/l - x x x x x x x x x x x bis (2-Chloroethoxy) methane mg/l - x x x x x x x x x x x bis (2-Chloroethyl) ether mg/l - x x x x x x x x x x x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - x x x x x x x x x x x bis (2-Ethylhexyl) phthalate mg/l - x x x x x x x x x x x Butylbenzylphthalate mg/l - x x x x x x x x x x x Carbazole mg/l - x x x x x x x x x x x Chlorobenzilate mg/l - x x x x x x x x x x x Chrysene mg/l - x x x x x x x x x <0.02 < Diallate mg/l - x x x x x x x x x x x Dibenz(a,j)acridine mg/l - x x x x x x x x x x x Dibenzo (a,h) anthracene mg/l - x x x x x x x x x <0.02 < Dibenzofuran mg/l - x x x x x x x x x x x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x x x Diethylphthalate mg/l - x x x x x x x x x x x Dimethylphthalate mg/l - x x x x x x x x x x x Di-n-butylphthalate mg/l - x x x x x x x x x x x Di-n-octylphthalate mg/l - x x x x x x x x x x x Diphenylamine mg/l - x x x x x x x x x x x Ethyl methanesulfonate mg/l - x x x x x x x x x x x Fluoranthene mg/l - x x x x x x x x x <0.02 < Fluorene mg/l - x x x x x x x x x <0.02 < Hexachlorobenzene mg/l - x x x x x x x x x x x Hexachlorocyclopentadiene mg/l - x x x x x x x x x x x Hexachloroethane mg/l - x x x x x x x x x x x Hexachloropropene mg/l - x x x x x x x x x x x HMX mg/l - x x x x x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - x x x x x x x x x <0.02 < Isophorone mg/l - x x x x x x x x x x x Isosafrole mg/l - x x x x x x x x x x x m-dinitrobenzene (1,3-DNB) mg/l - x x x x x x x x x x x Methapyrilene mg/l - x x x x x x x x x x x Methyl methanesulfonate mg/l - x x x x x x x x x x x Naphthalene mg/l 0.03 <1.0 <0.001 <0.001 <0.001 <0.001 < < <0.02 < Nitrobenzene mg/l - x x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

52 APPEIX B Las Cruces Foothills Landfill MW-4 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS RESULTS FOR MW-4 date 1/12/99 5/11/99 7/7/99 9/1/99 11/1/99 5/18/00 11/9/00 6/13/01 11/6/01 4/3/02 7/12/02 Page 3 of 9 n-nitrosodiethylamine mg/l - x x x x x x x x x x x n-nitrosodimethylamine mg/l - x x x x x x x x x x x n-nitrosodi-n-butylamine mg/l - x x x x x x x x x x x n-nitrosodinpropylamine mg/l - x x x x x x x x x x x n-nitrosodiphenylamine mg/l - x x x x x x x x x x x n-nitrosomethylethylamine mg/l - x x x x x x x x x x x n-nitrosopiperidine mg/l - x x x x x x x x x x x n-nitrosopyrrolidine mg/l - x x x x x x x x x x x o-toluidine mg/l - x x x x x x x x x x x p-(dimethylamino) azobenzene mg/l - x x x x x x x x x x x Pentachlorobenzene mg/l - x x x x x x x x x x x Pentachloronitrobenzene mg/l - x x x x x x x x x x x Phenacetin mg/l - x x x x x x x x x x x Phenanthrene mg/l - <0.1 <0.001 < < < < < < < <0.02 < p-phenylenediamine mg/l - x x x x x x x x x x x Pronamide mg/l - x x x x x x x x x x x Pyrene mg/l - <0.25 <0.001 < < < < < < < <0.02 < Pyridine mg/l - x x x x x x x x x x x RDX mg/l - x x x x x x x x x x x Safrole mg/l - x x x x x x x x x x x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x x x x Semi Volatile Organic Compounds - Phenolics x 2,3,4,6-Tetrachlorophenol mg/l - x x x x x x x x x <0.02 x 2,4,5-Trichlorophenol mg/l - x x x x x x x x x <0.1 x 2,4,6-Trichlorophenol mg/l - x x x x x x x x x <0.02 x 2,4-Dichlorophenol mg/l - x x x x x x x x x <0.02 x 2,4-Dimethylphenol mg/l - x x x x x x x x x <0.02 x 2,4-Dinitrophenol mg/l - x x x x x x x x x <0.1 x 2,6-Dichlorophenol mg/l - x x x x x x x x x <0.02 x 2-Chlorophenol mg/l - x x x x x x x x x <0.02 x 2-Methylphenol (o-cresol) mg/l - x x x x x x x x x <0.02 x 2-Nitrophenol (o-nitrophenol) mg/l - x x x x x x x x x <0.02 x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x x x x x x x x x <0.02 x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x x x x x x x x x <0.1 x 4-Chloro-3-methylphenol (p-chloro-m-cresol) mg/l - x x x x x x x x x <0.02 x 4-Nitrophenol (p-nitrophenol) mg/l - x x x x x x x x x <0.1 x 5-Nitro-o-toluidine mg/l - x x x x x x x x x x x Pentachlorophenol mg/l - x x x x x x x x x <0.1 x Phenol 1 (a) mg/l x x x x x x x x x < x Radium 226 and 228 NA pci/l x Ra-226, total NA pci/l x Ra-228 1, total NA pci/l x 2.86 Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x x x x x x x x x < < ,4'-DDE (p,p'-dde) mg/l - x x x x x x x x x < < ,4'DDT (p,p'-ddt) mg/l - x x x x x x x x x < < aldrin mg/l - x x x x x x x x x < < alpha-bhc mg/l - x x x x x x x x x < < alpha-chlordane mg/l - x x x x x x x x x < < beta-bhc mg/l - x x x x x x x x x < < Chlordane mg/l x x x x x x x x x x x delta-bhc mg/l - x x x x x x x x x < < Dieldrin mg/l - x x x x x x x x x < < Endosulfan I (alpha-endosulfan) mg/l - x x x x x x x x x < < Endosulfan II (beta-endosulfan) mg/l - x x x x x x x x x < < Endosulfan sulfate mg/l - x x x x x x x x x < < Endrin aldehyde mg/l - x x x x x x x x x < < Endrin ketone mg/l - x x x x x x x x x < < Endrin mg/l - x x x x x x x x x < < gamma-bhc mg/l - x x x x x x x x x < < gamma-chlordane mg/l - x x x x x x x x x < < Heptachlor epoxide mg/l - x x x x x x x x x < < Heptachlor mg/l - x x x x x x x x x < < Isodrin mg/l - x x x x x x x x x x x Kepone mg/l - x x x x x x x x x x x Methoxychlor mg/l - x x x x x x x x x < < Toxaphene mg/l - x x x x x x x x x <0.003 < Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Arochlor mg/l - x x x x x x x x x < < Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x x x x 2,4,5-T mg/l - x x x x x x x x x <0.002 x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x x <0.002 x Dimethoate mg/l - x x x x x x x x x <0.002 x Dinoseb mg/l - x x x x x x x x x <0.002 x Disulfoton mg/l - x x x x x x x x x <0.002 x Famphur mg/l - x x x x x x x x x <0.002 x Methyl parathion mg/l - x x x x x x x x x <0.002 x o,o,o-triethyl phosphorothioate mg/l - x x x x x x x x x <0.003 x Parathion (Ethyl) mg/l - x x x x x x x x x <0.002 x Phorate mg/l - x x x x x x x x x <0.002 x Silvex mg/l - x x x x x x x x x <0.002 x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x x x x x x x x x x x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environmental Protection, subpart 803. Ground Water Sampling and Analysis, hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics concentrations. (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of antimony in the ground water sampled. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

53 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-4 Page 4 of 9 *no sampling of MW-4 on 12/12/06 because pump was not work RESULTS FOR MW-4 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 6/21/07 1/18/08 12/23/08 12/29/09 12/29/10 12/27/11 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l <0.4 x x x x 0.31 x 0.29 x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - x <20 <2.0 <4.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <0.05 <0.05 <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.50 <1.0 <1.0 <1.0 Kjeldahl nitrogen mg/l - < <1 <1.0 x x x x <1.0 x x x nitrate as N mg/l <1.0 1 < nitrite mg/l - <0.1 <0.1 <0.1 <1.0 x x x x x x x x total nitrogen - mg/l - x x x x x x x x <1.0 x x x Metals aluminum mg/l 5.0 <0.03 <0.03 <0.03 <3.0 <3.0 x x x <0.02 x <0.02 x antimony mg/l (") <0.004 < <0.003 x x x x <0.001 <0.001 <0.001 < arsenic mg/l 0.01 <0.004 < <0.01 x x x x <0.001 < barium mg/l x x x x beryllium mg/l <0.001 <0.001 < <0.002 x x x x <0.003 x < boron mg/l <0.1 <0.5 x x x x 0.05 x x cadmium mg/l <0.001 <0.001 < <0.002 x x x x <0.002 < <0.002 <0.002 chromium mg/l 0.05 <0.002 < <0.01 x x x x <0.006 < < cobalt mg/l 0.05 <0.001 < <0.03 x x x x <0.006 < < copper mg/l <0.06 x x x x <0.006 < < iron mg/l 1.0 <0.007 <0.007 <0.10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.05 <0.050 < lead mg/l 0.05 <0.002 < <0.01 x x x x <0.005 < < manganese mg/l <0.010 <0.03 <0.030 <0.03 <0.03 < mercury mg/l <0.07 <0.2 < <0.001 x x x x < x < x molybdenum mg/l 1.0 <0.002 <0.002 <0.010 <0.75 x x x x <0.008 x <0.008 x nickel mg/l 0.2 <0.002 < <0.05 x x x x <0.01 <0.010 <0.01 < selenium mg/l 0.05 <0.003 < <0.005 x x x x <0.001 <0.001 < silver mg/l 0.05 <0.002 <0.002 <0.010 <0.01 x x x x <0.005 < <0.005 <0.005 thallium mg/l <0.003 < <0.001 x x x x <0.001 <0.001 <0.001 < tin mg/l - x x x x x x x x <0.1 x x x uranium mg/l <2.5 x x x x x x x vanadium mg/l <0.050 <0.08 x x x x <0.05 <0.050 < zinc mg/l <0.008 <0.020 <0.05 x x x x <0.02 <0.020 < total organic carbon - mg/l - 1 <1.0 < <0.5 <1.0 < < phosphate mg/l - x x x x x x x x <0.50 x <0.50 x sulfide mg/l - x x x x x x x x 3 x x x cyanide mg/l 0.2 <0.005 <0.005 <0.01 <0.1 x x x x <0.005 x x x perchlorate mg/l - x total phenolics 1 - mg/l <0.003 <0.003 <0.005 <0.003 <0.003 <0.003 <0.003 < < < < < Polychlorinated Biphenyls (PCBs) mg/l (^^) (^^) (^^) (^^) x x x x (^^) x x x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 < ,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 < ,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 < ,1,2-Trichloroethane mg/l <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 < ,1-Dichloroethane mg/l <0.005 <0.005 <0.005 <0.005 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE mg/l <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,1-Dichloropropene mg/l - <0.001 x < x x x x x <0.005 x x x 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < < < < < ,2,3-Trichlorobenzene mg/l - x <0.001 < x x x x x x x x x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 < ,2,4-Trichlorobenzene mg/l - x <0.001 < x x x x x <0.001 x x x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 x < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 < ,2-Dichloroethane (EDC) mg/l <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,2-Dichloropropane mg/l < < < < < < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 <0.001 < x x x x x <0.01 <0.001 x x 1,3-Dichloropropane mg/l - <0.001 <0.001 < x x x x x <0.01 x x x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 < <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 < ,2-Dichloropropane mg/l - <0.001 <0.001 < x x x x x <0.015 x x x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.025 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < Chlorotoluene mg/l - x <0.001 < x x x x x x x x x 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 < Chlorotoluene mg/l - x <0.001 < x x x x x x x x x 4-Methyl-2-pentanone mg/l - <0.001 <0.01 <0.025 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.01 <0.01 <0.01 Acetone mg/l - <0.01 <0.01 <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 Acrolein mg/l - <0.005 x <0.025 x x x x x <0.1 x x x Acrylonitrile mg/l - <0.005 <0.005 <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.01 <0.01 <0.01 Benzene mg/l <0.001 <0.001 < <0.001 < <0.001 <0.001 <0.001 <0.001 < Bis(chloromethyl) ether mg/l - x x x x x x x x (# ) x x x Bromochloromethane mg/l - <0.001 <0.001 <0.002 <0.02 <0.002 <0.002 <0.002 <0.002 <0.02 <0.002 <0.002 <0.002 Bromomethane (methyl bromide) mg/l - <0.001 <0.001 <0.001 <0.002 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.002 <0.002 Carbon Disulfide mg/l - <0.001 <0.001 <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 Carbon Tetrachloride mg/l <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 Chlorobenzene mg/l 0.1 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 Chloroethane mg/l - <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.002 Chloromethane (methyl chloride) mg/l - <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 < <0.005 <0.005 <0.005 <0.005 < cis-1,3-dichloropropene mg/l - <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 Dichlorodifluoromethane mg/l x x Ethyl methacrylate mg/l - x x x x x x x x <0.01 x x x Ethylbenzene mg/l 0.7 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < < < < < < < < < < < Hexachlorobutadiene mg/l - <0.001 <0.001 < x x x x x <0.001 x x x Isobutyl alcohol mg/l - x x x x x x x x <0.05 x x x Isopropylbenzene mg/l - x <0.001 < x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

54 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-4 Page 5 of 9 *no sampling of MW-4 on 12/12/06 because pump was not work RESULTS FOR MW-4 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 6/21/07 1/18/08 12/23/08 12/29/09 12/29/10 12/27/11 Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl Chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l - Benzo[a]pyrene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz(a,j)acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - x x x x x x x x <0.005 x x x <0.005 <0.005 <0.005 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.01 <0.01 <0.01 x x x x x x x x <0.03 x x x < x <0.001 < x x x x x x x x x x x x x x x x x <0.06 <0.01 x x x <0.001 < x x x x x x x x x x <0.001 < x x x x x x x x x <0.001 <0.001 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 x <0.001 <0.005 x x x x x <0.001 x x x x <0.001 < x x x x x x x x x < x x <0.010 x x x x x x x x x <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 < <0.002 <0.002 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.002 < <0.001 <0.001 < <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 < <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.010 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 < < <0.01 <0.01 <0.01 <0.01 < < <0.001 <0.001 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 < < < < < < < < < < <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 x x x < < <0.005 <0.01 x x x x <0.001 x x x x x x x x x x x x < x x x x x x < < <0.010 <0.01 x x x x <0.001 x x x x x x x x x x x x x x x x < < <0.005 < x x x x < x x x < < <0.005 x x x x x <0.001 x x x x x x < < <0.005 x x x x x <0.001 x x x x < < <0.005 x x x x x <0.001 x x x < < <0.005 x x x x x < x x x < < <0.005 x x x x x < x x x < < <0.005 x x x x x < x x x < < <0.005 x x x x x <0.001 x x x x x x x x x x x < < <0.005 x x x x x < x x x x < < <0.005 x x x x x < x x x x x x x x x x < < <0.005 x x x x x <0.001 x x x < < <0.005 x x x x x <0.001 x x x x x x x x x x x < x x x x x x x x x x x x x x < x x x < < <0.005 x x x x x < x x x x x x x x x x x x x < x x x x x < < <0.005 <0.01 x x x x <0.001 x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

55 Las Cruces Foothills Landfill monitoring well MW-4 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-4 Page 6 of 9 *no sampling of MW-4 on 12/12/06 because pump was not work RESULTS FOR MW-4 9/25/02 12/18/02 7/15/03 12/29/03 12/2/04 12/14/05 6/21/07 1/18/08 12/23/08 12/29/09 12/29/10 12/27/11 n-nitrosodiethylamine mg/l - x n-nitrosodimethylamine mg/l - x n-nitrosodi-n-butylamine mg/l - x n-nitrosodinpropylamine mg/l - x n-nitrosodiphenylamine mg/l - x n-nitrosomethylethylamine mg/l - x n-nitrosopiperidine mg/l - x n-nitrosopyrrolidine mg/l - x o-toluidine mg/l - x p-(dimethylamino) azobenzene mg/l - x Pentachlorobenzene mg/l - x Pentachloronitrobenzene mg/l - x Phenacetin mg/l - x Phenanthrene mg/l - < < <0.005 x x x x x <0.001 x x x p-phenylenediamine mg/l - x Pronamide mg/l - x Pyrene mg/l - < < <0.005 x x x x x <0.001 x x x Pyridine mg/l - x RDX mg/l - x x x x x x x x < x x x Safrole mg/l - x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x x x x x x x x < x x x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - x 2,4,5-Trichlorophenol mg/l - x 2,4,6-Trichlorophenol mg/l - x 2,4-Dichlorophenol mg/l - x 2,4-Dimethylphenol mg/l - x 2,4-Dinitrophenol mg/l - x 2,6-Dichlorophenol mg/l - x 2-Chlorophenol mg/l - x 2-Methylphenol (o-cresol) mg/l - x 2-Nitrophenol (o-nitrophenol) mg/l - x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x 4-Chloro-3-methylphenol (p-chloro-m-cresol) mg/l - x 4-Nitrophenol (p-nitrophenol) mg/l - x 5-Nitro-o-toluidine mg/l - x Pentachlorophenol mg/l - x Phenol 1 (a) mg/l x Radium 226 and 228 NA pci/l <2.5 x x x x 1.53 Ra-226, total NA pci/l <2.5 x x x x 0.13 x x x Ra-228 1, total NA pci/l <2.5 x x x x 1.4 x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x x x x x x x x < x x x 4,4'-DDE (p,p'-dde) mg/l - x x x x x x x x < x x x 4,4'DDT (p,p'-ddt) mg/l - x x x x x x x x < x x x aldrin mg/l - x x x x x x x x < x x x alpha-bhc mg/l - x x x x x x x x < x x x alpha-chlordane mg/l - beta-bhc mg/l - x x x x x x x x < x x x Chlordane mg/l x x x x x x x x < x x x delta-bhc mg/l - x x x x x x x x < x x x Dieldrin mg/l - x x x x x x x x < x x x Endosulfan I (alpha-endosulfan) mg/l - x x x x x x x x < x x x Endosulfan II (beta-endosulfan) mg/l - x x x x x x x x < x x x Endosulfan sulfate mg/l - x x x x x x x x < x x x Endrin aldehyde mg/l - x x x x x x x x < x x x Endrin ketone mg/l - Endrin mg/l - x x x x x x x x < x x x gamma-bhc mg/l - x x x x x x x x < x x x gamma-chlordane mg/l - Heptachlor epoxide mg/l - x x x x x x x x < x x x Heptachlor mg/l - x x x x x x x x < x x x Isodrin mg/l - x Kepone mg/l - x Methoxychlor mg/l - x x x x x x x x < x x x Toxaphene mg/l - x Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Arochlor mg/l - < < < < x x x x < x x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x < x x x 2,4,5-T mg/l - x x x x x x x x < x x x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x x x x x x x < x x x Dimethoate mg/l - x Dinoseb mg/l - x x x x x x x x < x x x Disulfoton mg/l - x Famphur mg/l - x Methyl parathion mg/l - x o,o,o-triethyl phosphorothioate mg/l - x Parathion (Ethyl) mg/l - x Phorate mg/l - x Silvex mg/l - x x x x x x x x < x x x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requiremen 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics conce (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of a (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

56 APPEIX B Las Cruces Foothills Landfill MW-4 Page 7 of 9 Las Cruces Foothills Landfill monitoring well MW-4 ing baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-4 average deviation date 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/27/16 6/28/17 1/12/99 to 1/12/99 to 5/18/00 5/18/00 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l 1.6 x x x x x 0.25 x x x x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <1.0 x total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <0.01 x Kjeldahl nitrogen mg/l - x x x x x <1.0 x x x x x <0.1 x nitrate as N mg/l < nitrite mg/l - x x x x x x x x x x x total nitrogen - mg/l - x x x x x <1.0 x x x x x x x Metals aluminum mg/l 5.0 x x x x x <0.02 x x x x x <0.05 x antimony mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x arsenic mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < barium mg/l beryllium mg/l <0.002 <0.002 <0.002 <0.002 <0.003 <0.002 <0.003 <0.002 <0.002 <0.002 <0.002 < x boron mg/l 0.75 x x x x x x x x x x cadmium mg/l <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x chromium mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 < cobalt mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.01 x copper mg/l < iron mg/l 1.0 <0.02 <0.02 <0.02 <0.02 <0.05 <0.02 <0.05 <0.02 <0.02 <0.02 <0.02 <0.05 x lead mg/l < < x manganese mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < x mercury mg/l x x x x x < x x x x x x molybdenum mg/l 1.0 x x x x x <0.008 x x x x x <0.05 x nickel mg/l 0.2 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < selenium mg/l 0.05 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < silver mg/l 0.05 <0.005 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.02 x thallium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < x tin mg/l - x uranium mg/l 0.03 x x x x x x x x x x vanadium mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < x zinc mg/l < < <0.01 x total organic carbon - mg/l - < <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < phosphate mg/l - x sulfide mg/l - x cyanide mg/l 0.2 x x x x x x x x x x x <0.02 x perchlorate mg/l - x total phenolics 1 - mg/l < < < < < < < < < < < x Polychlorinated Biphenyls (PCBs) mg/l x x x x x (^^) x x x x x < x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2-Trichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x 1,1-Dichloropropene mg/l - x 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < < < < <0.01 x 1,2,3-Trichlorobenzene mg/l - x x x x x x x x x x x <0.001 x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2,4-Trichlorobenzene mg/l - x x x x x x x x x x x <0.001 x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x 1,2-Dichloroethane (EDC) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloropropane mg/l < < < < < < < < < < < <0.001 x 1,3-Dichlorobenzene (m-dichlorobenzene) mg/l - x x x x x x x x x x x <0.001 x 1,3-Dichloropropane mg/l - x x x x x x x x x x x <0.001 x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 2,2-Dichloropropane mg/l - x x x x x x x x x x x <0.001 x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Chlorotoluene mg/l - x x x x x x x x x x x <0.001 x 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x 4-Chlorotoluene mg/l - x x x x x x x x x x x <0.001 x 4-Methyl-2-pentanone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acrolein mg/l - x Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Benzene mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bis(chloromethyl) ether mg/l - x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroprene (2-Chloro-1,3-butadiene) mg/l - x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l <0.001 x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dichlorodifluoromethane mg/l Ethyl methacrylate mg/l - x Ethylbenzene mg/l 0.7 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < < < < < < < < < < <0.001 x Hexachlorobutadiene mg/l - x x x x x x x x x x x <0.001 x Isobutyl alcohol mg/l - x Isopropylbenzene mg/l - x x x x x x x x x x x <0.001 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

57 APPEIX B Las Cruces Foothills Landfill MW-4 Page 8 of 9 Las Cruces Foothills Landfill monitoring well MW-4 ing baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-4 average deviation date 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/27/16 6/28/17 1/12/99 to 1/12/99 to 5/18/00 5/18/00 Methacrylonitrile mg/l - x Methyl Iodide (Iodomethane) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Methyl methacrylate mg/l - x Methylene Chloride mg/l <0.002 x n-butylbenzene mg/l - x x x x x x x x x x x <0.001 x Propionitrile mg/l - x Propylbenzene mg/l - x x x x x x x x x x x <0.001 x sec-butylbenzene mg/l - x x x x x x x x x x x <0.001 x Styrene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x tert-butyl methyl ether (MTBE) (a) mg/l 0.1 x x x x x x x x x x x <0.01 x tert-butylbenzene mg/l - x x x x x x x x x x x <0.001 x Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - x x x x x x x x x x x <0.001 x Toluene mg/l 0.75 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 x trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,4-dichloro-2-butene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l Vinyl acetate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 x Vinyl Chloride mg/l < < < < < < < < < <0.001 x Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bromoform mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroform mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromochloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - x 1,2-Diphenylhydrazine mg/l - x 1,4-Naphthoquinone mg/l - x 1-Chloronaphthalene NA mg/l - x 1-Methylnaphthalene mg/l - x x x x x <0.002 x x x x x x x 1-Naphthylamine mg/l - x 2,4,6-Trinitrotoluene (TNT) mg/l - x 2,4-Dinitrotoluene (2,4-DNT) mg/l - x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - x 2-Chloronaphthalene mg/l - x 2-Methylnaphthalene mg/l - x x x x x <0.002 x x x x x x x 2-Naphthylamine mg/l - x 2-Nitroaniline (o-nitroaniline) mg/l - x 2-Picoline mg/l - x 3,3'-Dichlorobenzidine mg/l - x 3,3'-Dimethylbenzidine mg/l - x 3-Methylcholanthrene mg/l - x 3-Nitroaniline (m-nitroaniline) mg/l - x 4-Aminobiphenyl mg/l - x 4-Bromophenylphenyl ether mg/l - x 4-Chloroaniline (p-chloroanaline) mg/l - x 4-Chlorophenylphenyl ether mg/l - x 4-Nitroaniline (p-nitroaniline) mg/l - x 7,12-Dimethylbenz (a) anthracene mg/l - x Acenaphthene mg/l - x Acenaphthylene mg/l - x Acetophenone mg/l - x alpha,alpha-dimethylphenethylamine mg/l - x Aniline mg/l - x Anthracene mg/l - x Benzidine mg/l - x Benzo (a) anthracene mg/l - x Benzo (b) fluoranthene mg/l - x Benzo (g,h,i) perylene mg/l - x Benzo (k) fluoranthene mg/l - x Benzo[a]pyrene mg/l x x x x x < x x x x x <0.1 x Benzoic acid mg/l x x x x x x x x x x x Benzyl alcohol mg/l - x bis (2-Chloroethoxy) methane mg/l - x bis (2-Chloroethyl) ether mg/l - x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - x bis (2-Ethylhexyl) phthalate mg/l - x Butylbenzylphthalate mg/l - x Carbazole mg/l - x Chlorobenzilate mg/l - x Chrysene mg/l - x Diallate mg/l - x Dibenz(a,j)acridine mg/l - x Dibenzo (a,h) anthracene mg/l - x Dibenzofuran mg/l - x Diethylene Glycol Monobutyl Ether mg/l - x Diethylphthalate mg/l - x Dimethylphthalate mg/l - x Di-n-butylphthalate mg/l - x Di-n-octylphthalate mg/l - x Diphenylamine mg/l - x Ethyl methanesulfonate mg/l - x Fluoranthene mg/l - x Fluorene mg/l - x Hexachlorobenzene mg/l - x Hexachlorocyclopentadiene mg/l - x Hexachloroethane mg/l - x Hexachloropropene mg/l - x HMX mg/l - x Indeno (1,2,3-cd) pyrene mg/l - x Isophorone mg/l - x Isosafrole mg/l - x m-dinitrobenzene (1,3-DNB) mg/l - x Methapyrilene mg/l - x Methyl methanesulfonate mg/l - x Naphthalene mg/l 0.03 x x x x x <0.002 x x x x x <1.0 x Nitrobenzene mg/l - x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

58 APPEIX B Las Cruces Foothills Landfill MW-4 Page 9 of 9 Las Cruces Foothills Landfill monitoring well MW-4 ing baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-4 average deviation date 6/19/12 12/19/12 6/25/13 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/27/16 6/28/17 1/12/99 to 1/12/99 to 5/18/00 5/18/00 n-nitrosodiethylamine mg/l - x n-nitrosodimethylamine mg/l - x n-nitrosodi-n-butylamine mg/l - x n-nitrosodinpropylamine mg/l - x n-nitrosodiphenylamine mg/l - x n-nitrosomethylethylamine mg/l - x n-nitrosopiperidine mg/l - x n-nitrosopyrrolidine mg/l - x o-toluidine mg/l - x p-(dimethylamino) azobenzene mg/l - x Pentachlorobenzene mg/l - x Pentachloronitrobenzene mg/l - x Phenacetin mg/l - x Phenanthrene mg/l - x x x x x x x x x x x <0.1 x p-phenylenediamine mg/l - x Pronamide mg/l - x Pyrene mg/l - x x x x x x x x x x x <0.25 x Pyridine mg/l - x RDX mg/l - x Safrole mg/l - x sym-trinitrobenzene 1 (1,3,5-trinitrobenzene, 1,3,5-TNB) mg/l - x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - x 2,4,5-Trichlorophenol mg/l - x 2,4,6-Trichlorophenol mg/l - x 2,4-Dichlorophenol mg/l - x 2,4-Dimethylphenol mg/l - x 2,4-Dinitrophenol mg/l - x 2,6-Dichlorophenol mg/l - x 2-Chlorophenol mg/l - x 2-Methylphenol (o-cresol) mg/l - x 2-Nitrophenol (o-nitrophenol) mg/l - x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x 4-Chloro-3-methylphenol (p-chloro-m-cresol) mg/l - x 4-Nitrophenol (p-nitrophenol) mg/l - x 5-Nitro-o-toluidine mg/l - x Pentachlorophenol mg/l - x Phenol 1 (a) mg/l x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l - x x x x x x x x x x Ra-228 1, total NA pci/l - x x x x x 1.18 x x x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - x 4,4'-DDE (p,p'-dde) mg/l - x 4,4'DDT (p,p'-ddt) mg/l - x aldrin mg/l - x alpha-bhc mg/l - x alpha-chlordane mg/l - x beta-bhc mg/l - x Chlordane mg/l x delta-bhc mg/l - x Dieldrin mg/l - x Endosulfan I (alpha-endosulfan) mg/l - x Endosulfan II (beta-endosulfan) mg/l - x Endosulfan sulfate mg/l - x Endrin aldehyde mg/l - x Endrin ketone mg/l - x Endrin mg/l - x gamma-bhc mg/l - x gamma-chlordane mg/l - x Heptachlor epoxide mg/l - x Heptachlor mg/l - x Isodrin mg/l - x Kepone mg/l - x Methoxychlor mg/l - x Toxaphene mg/l - x Polychlorinated Biphenyls (PCBs) 1 mg/l Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Arochlor mg/l - x x x x x < x x x x x x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x 2,4,5-T mg/l - x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x Dimethoate mg/l - x Dinoseb mg/l - x Disulfoton mg/l - x Famphur mg/l - x Methyl parathion mg/l - x o,o,o-triethyl phosphorothioate mg/l - x Parathion (Ethyl) mg/l - x Phorate mg/l - x Silvex mg/l - x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requiremen 1 hazardous x parameter not analyzed (^) See section entitled 'Semi volatile organic compounds - phenolics' for break-out of phenolics conce (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (") This concentration attributed to laboratory contamination of method blank and not the presence of a (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

59 Mr. James Dyer September 27, 2017 MW-5 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

60 APPEIX B Page 1 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS RESULTS FOR MW-5 date 7/15/03 8/27/03 9/29/03 10/29/03 11/25/03 12/29/03 12/2/04 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <20 <2 <2.0 <2.0 <2.0 <2.0 <4.0 total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Kjeldahl nitrogen mg/l - <1 <1.0 <1.0 <1.0 <1.0 <1.0 x nitrate as N mg/l nitrite mg/l - < x total nitrogen - mg/l - x x x x x x x Metals aluminum mg/l <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 antimony mg/l < <0.003 <0.003 <0.003 <0.003 <0.003 x arsenic mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x barium mg/l x beryllium mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 x boron mg/l 0.75 <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 x cadmium mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 x chromium mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x cobalt mg/l <0.03 <0.03 <0.03 <0.03 <0.03 x copper mg/l <0.06 <0.06 <0.06 <0.06 <0.06 x iron mg/l <0.1 <0.1 <0.1 <0.1 <0.1 x lead mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x manganese mg/l 0.2 <0.010 <0.03 <0.03 <0.03 <0.03 <0.03 x mercury mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 x molybdenum mg/l 1.0 <0.010 <0.75 <0.75 <0.75 <0.75 <0.75 x nickel mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x selenium mg/l <0.005 <0.005 <0.005 <0.005 <0.005 x silver mg/l 0.05 <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x thallium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 x tin mg/l - <0.10 x x x x <0.4 x uranium mg/l 0.03 <0.002 <2.5 <2.5 <2.5 <2.5 <2.5 x vanadium mg/l - <0.050 <0.08 <0.08 <0.08 <0.08 <0.08 x zinc mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x total organic carbon - mg/l - 1 <1.0 <1.0 <1.0 < <0.5 phosphate mg/l - x x x x x x x sulfide mg/l - <0.1 x x x x <4.0 x cyanide mg/l 0.2 <0.01 <0.1 <0.1 <0.1 <0.1 <0.1 x perchlorate mg/l - x x x x x x x total phenolics 1 - mg/l <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 Polychlorinated Biphenyls (PCBs) mg/l (^^) (^^) (^^) (^^) (^^) (^^) x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,1-Trichloroethane mg/l 0.06 < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2,2-Tetrachloroethane mg/l 0.01 < <0.001 <0.005 <0.005 <0.005 <0.005 < ,1,2-Trichloroethane mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 < ,1-Dichloroethane mg/l < <0.005 <0.005 <0.005 <0.005 <0.005 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloropropene mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 x 1,2 Dibromo-3-chloropropane (DBCP) mg/l <0.01 < < < < < < ,2,3-Trichlorobenzene mg/l - < x x x x x x 1,2,3-Trichloropropane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2,4-Trichlorobenzene mg/l - < x x x x x x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2-Dichloroethane (EDC) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 < ,2-Dichloropropane mg/l < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x 1,3-Dichloropropane mg/l - < <0.005 <0.01 <0.01 <0.01 <0.01 x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l < <0.015 <0.015 <0.015 <0.015 <0.015 < ,2-Dichloropropane mg/l - < < <0.015 <0.015 <0.015 <0.015 x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.025 <0.01 <0.01 <0.01 <0.01 <0.01 < Chlorotoluene mg/l - < x x x x x x 2-Hexanone (Butyl Ketone) mg/l 0.02 <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 < Chlorotoluene mg/l - < x x x x x x 4-Methyl-2-pentanone mg/l - <0.025 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

61 APPEIX B Page 2 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS RESULTS FOR MW-5 date 7/15/03 8/27/03 9/29/03 10/29/03 11/25/03 12/29/03 12/2/04 Acetone mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Acetonitrile mg/l - <0.100 <0.100 <0.1 <0.1 <0.1 <0.1 x Acrolein mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 x Acrylonitrile mg/l - <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 Allyl chloride mg/l - x <0.01 <0.01 <0.01 <0.01 <0.01 x Benzene mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Bromomethane (methyl bromide) mg/l - <0.001 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 Carbon Disulfide mg/l - <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Carbon Tetrachloride mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Chlorobenzene mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Chloroethane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Chloromethane (methyl chloride) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 cis-1,3-dichloropropene mg/l - < <0.001 <0.02 <0.02 <0.02 <0.02 x Dibromomethane (methylene bromide) mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dichlorodifluoromethane mg/l <0.005 <0.005 <0.005 <0.005 <0.005 x Ethyl methacrylate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Ethylbenzene mg/l 0.7 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l < < < < < < < Hexachlorobutadiene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x Isobutyl alcohol mg/l - <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 x Isopropylbenzene mg/l - < x x x x x x Methacrylonitrile mg/l - <0.025 <0.005 <0.005 <0.005 <0.005 <0.005 x Methyl Iodide (Iodomethane) mg/l - <0.005 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 Methyl methacrylate mg/l - <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 x Methylene Chloride mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 n-butylbenzene mg/l - < x x x x x x Propionitrile mg/l - <0.01 <0.06 <0.06 <0.06 <0.06 <0.06 x Propylbenzene mg/l - < x x x x x x sec-butylbenzene mg/l - < x x x x x x Styrene mg/l 0.1 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.005 x x x x x x tert-butylbenzene mg/l - < x x x x x x Tetrachloroethene (PCE) mg/l <0.005 Tetrahydrofuran (THF) mg/l - <0.01 x x x x x x Toluene mg/l <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 trans-1,2-dichloroethene mg/l 0.1 < <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 trans-1,4-dichloro-2-butene mg/l - <0.010 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Trichloroethene (TCE) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Trichlorofluoromethane mg/l - <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Vinyl acetate mg/l - <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 Vinyl chloride mg/l < < < < < < < Trihalomethanes (THM) Bromodichloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Bromoform mg/l - <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 Chloroform mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Dibromochloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 1,2-Diphenylhydrazine mg/l - <0.005 x x x x x x 1,4-Naphthoquinone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 1-Chloronaphthalene NA mg/l - <0.005 x x x x x x 1-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x 1-Naphthylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x 2-Acetylaminofluorene mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x 2-Chloronaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Naphthylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Nitroaniline (o-nitroaniline) mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Picoline mg/l - <0.01 x x x x x x 3,3'-Dichlorobenzidine mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x 3,3'-Dimethylbenzidine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 3-Methylcholanthrene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 3-Nitroaniline (m-nitroaniline) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x 4-Aminobiphenyl mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x 4-Bromophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x 4-Chloroaniline (p-chloroanaline) mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x 4-Chlorophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x 4-Nitroaniline (p-nitroaniline) mg/l - <0.05 <0.02 <0.02 <0.02 <0.02 <0.02 x 5-Nitro-o-toluidine mg/l - x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

62 APPEIX B Page 3 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS RESULTS FOR MW-5 date 7/15/03 8/27/03 9/29/03 10/29/03 11/25/03 12/29/03 12/2/04 7,12-Dimethylbenz (a) anthracene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acenaphthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Acenaphthylene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Acetophenone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x alpha,alpha-dimethylphenethylamine mg/l - <0.01 x x x x x x Aniline mg/l - <0.01 x x x x x x Anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Benzidine mg/l - <0.05 x x x x x x Benzo (a) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Benzo (a) pyrene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x Benzo (b) fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Benzo (g,h,i) perylene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x Benzo (k) fluoranthene mg/l <0.005 < < < < < x Benzoic acid mg/l <0.05 x x x x x x Benzyl alcohol mg/l - <0.02 <0.01 <0.01 <0.01 <0.01 <0.01 x bis (2-Chloroethoxy) methane mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x bis (2-Chloroethyl) ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x bis (2-Ethylhexyl) phthalate mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x Butylbenzylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Carbazole mg/l - <0.005 x x x x x x Chlorobenzilate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Chrysene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Diallate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Dibenz (a,j) acridine mg/l - <0.01 x x x x x x Dibenzo (a,h) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Dibenzofuran mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x Diethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Dimethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Di-n-butylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Di-n-octylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Diphenylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Ethyl methanesulfonate mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x Fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Fluorene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Hexachlorobenzene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x Hexachlorocyclopentadiene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Hexachloroethane mg/l - <0.005 <0.05 <0.05 <0.05 <0.05 <0.05 x Hexachloropropene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x HMX mg/l - x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Isophorone mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Isosafrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x m-dinitrobenzene (1,3-DNB) mg/l - x <0.02 <0.02 <0.02 <0.02 <0.02 x Methapyrilene mg/l - <0.1 <0.02 <0.02 <0.02 <0.02 <0.02 x Methyl methanesulfonate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Naphthalene mg/l 0.03 <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Nitrobenzene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x n-nitrosodiethylamine mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x n-nitrosodimethylamine mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 x n-nitrosodi-n-butylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x n-nitrosodinpropylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x n-nitrosodiphenylamine mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x n-nitrosomethylethylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x n-nitrosopiperidine mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x n-nitrosopyrrolidine mg/l - <0.02 <0.04 <0.04 <0.04 <0.04 <0.04 x o-toluidine mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 x p-(dimethylamino) azobenzene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Pentachlorobenzene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Pentachloronitrobenzene mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x Phenacetin mg/l - <0.02 <0.01 <0.01 <0.01 <0.01 <0.01 x Phenanthrene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x p-phenylenediamine mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x Pronamide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Pyridine mg/l - <0.01 x x x x x x RDX mg/l - x x x x x x x Safrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 x x 2,4,5-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2,4,6-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2,4-Dichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2,4-Dimethylphenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2,4-Dinitrophenol mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

63 APPEIX B Page 4 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS RESULTS FOR MW-5 date 7/15/03 8/27/03 9/29/03 10/29/03 11/25/03 12/29/03 12/2/04 2,6-Dichlorophenol mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 x x 2-Chlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2-Methylphenol (o-cresol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 2-Nitrophenol (o-nitrophenol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 x x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - <0.02 <0.005 <0.005 <0.005 <0.005 <0.005 x 4-Nitrophenol (p-nitrophenol) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x Pentachlorophenol mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 x x Phenol 1 (a) mg/l <0.005 <0.01 <0.01 <0.01 <0.01 x x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l <2.5 <2.5 <2.5 <2.5 <2.5 x Ra-228 1, total NA pci/l <2.5 <2.5 <2.5 <2.5 <2.5 x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x 4,4'-DDE (p,p'-dde) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x 4,4'-DDT (p,p'-ddt) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x aldrin mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x alpha-bhc mg/l - < < < < < < x alpha-chlordane mg/l - < alpha + alpha + alpha + alpha + alpha + x beta-bhc mg/l - < < < < < < x Chlordane mg/l x x x x x x x delta-bhc mg/l - < < < < < < x Dieldrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Endosulfan I (alpha-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Endosulfan II (beta-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Endosulfan sulfate mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Endrin aldehyde mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Endrin ketone mg/l - < x x x x x x Endrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x gamma-bhc mg/l - < < < < < < x gamma-chlordane mg/l - < see above see above see above see above see above x Heptachlor epoxide mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Heptachlor mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x Isodrin mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x Kepone mg/l - <0.025 <0.02 <0.02 <0.02 <0.02 <0.02 x Methoxychlor mg/l - <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 x Toxaphene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x Polychlorinated Biphenyls (PCBs) Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Arochlor mg/l - < < < < < < x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x 2,4,5-T mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x Dimethoate mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x Dinoseb mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x Disulfoton mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x Famphur mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x Methyl parathion mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x o,o,o-triethyl phosphorothioate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Parathion (Ethyl) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x Phorate mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x Silvex 1 (2,4,5-TP) mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x <0.02 <0.02 <0.02 <0.02 <0.02 x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environmental Protection, subpart 803. Ground Water Sampling and Analysis, hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

64 APPEIX B Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS date Page 5 of 12 RESU 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l x x x 0.59 x 0.58 x x <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 < <0.5 <0.5 <0.5 <0.50 <1.0 <1.0 <1.0 <1.0 x x x <1.0 x x x x x x x x x x x x x x x 2.7 x x x x x x x <0.02 x 0.02 x x x x x <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x <0.003 x < <0.002 x x x x x x x x x <0.002 < <0.002 <0.002 <0.002 x x x < < <0.006 x x x <0.006 < < <0.006 x x x <0.006 < <0.006 <0.006 <0.006 <0.1 <0.1 <0.1 < <0.05 < x x x <0.005 < <0.005 <0.005 <0.005 <0.03 <0.03 <0.03 < < <0.002 x x x < x < x x x x x <0.008 x <0.008 x x x x x < <0.01 <0.01 <0.01 x x x <0.001 < x x x <0.005 < <0.005 <0.005 <0.005 x x x <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.1 x x x x x x x x x x x x x x <0.05 <0.050 < <0.05 x x x <0.02 <0.020 < <0.01 <0.5 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 x x x <0.50 x <0.50 x x x x x 2 x x x x x x x <0.005 x x x x <0.003 <0.003 < < < < < < x x x (^^) x x x x <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 x x x <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.005 x x x x < < < < < < < < x x x x x x x x <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < x x x <0.001 <0.001 x x x x x x <0.01 x x x x <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.015 x x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 x x x x x x x x <0.015 <0.015 <0.015 <0.015 <0.01 <0.01 <0.01 <0.01 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

65 APPEIX B Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS date Page 6 of 12 RESU 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 Acetone mg/l - Acetonitrile mg/l - Acrolein mg/l - Acrylonitrile mg/l - Allyl chloride mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l - Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - <0.1 <0.1 <0.1 <0.1 <0.01 < <0.01 x x x <0.1 x x x x x x x <0.1 x x x x <0.2 <0.2 <0.2 <0.2 <0.01 <0.01 <0.01 <0.01 x x x <0.01 x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x (#) x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.02 <0.02 <0.02 <0.02 <0.002 <0.002 <0.002 <0.002 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x <0.005 <0.005 <0.005 <0.005 <0.001 < <0.001 x x x <0.02 <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 x x < < x x x <0.01 x x x x <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 < < < < < < < x x x <0.05 x x x x x x x x x x x x x x x <0.005 x x x x <0.04 <0.04 <0.04 <0.04 <0.01 <0.01 <0.01 <0.01 x x x <0.03 x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x <0.06 x x x x x x x x x x x x x x x x x x x x <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x x x x x <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.01 <0.01 <0.01 <0.01 <0.001 < <0.001 <0.05 <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 < < < < < < < < <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x < x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

66 APPEIX B Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS date Page 7 of 12 RESU 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (a) pyrene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

67 APPEIX B Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 constituent CAS Number unit GWPS date Page 8 of 12 RESU 12/14/05 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex 1 (2,4,5-TP) mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in E 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. 0.3 x x x 0.14 x x x x x x x 0.16 x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x < x x x x x x x x x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x x x x < x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

68 APPEIX B Page 9 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 baseline standard constituent CAS Number unit GWPS ULTS FOR MW-5 average deviation date 12/20/12 6/26/13 6/16/16 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 Field Parameters water level elevation ft amsl , conductivity µs/cm ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l x x x x x <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 x <1.0 <1.0 <1.0 <1.0 <1.0 <0.5 x x x x x x <1.0 x x x x x x x x x x x x x x x x x x <3.0 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x x x x x x <0.5 x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x <0.006 <0.006 <0.006 <0.006 < x <0.006 <0.006 <0.006 <0.006 < x <0.006 <0.006 <0.006 <0.006 < x <0.02 <0.02 < < x <0.005 <0.001 < < < x <0.002 <0.002 <0.002 <0.002 <0.002 <0.03 x x x x x x <0.001 x x x x x x <0.75 x <0.01 <0.01 <0.01 <0.01 < x < <0.005 < x <0.005 <0.005 <0.005 <0.005 <0.005 <0.01 x <0.001 <0.001 < < < x x x x x x <0.4 x x x x x x <2.5 x <0.05 <0.05 <0.05 <0.05 <0.05 <0.08 x <0.01 <0.01 <0.01 <0.01 < x < <1.0 <1.0 < x x x x x x x x x x x x <4.0 x x x x x x <0.1 x x x x x x x x < < < < < <0.003 x x x x x x (^^) (^^) <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x <0.005 x < < < < < < x x x x x x < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x x x x x x < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x < < < < < < x x x x x x <0.01 x x x x x x <0.01 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 x x x x x x <0.015 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x < x <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 x x x x x x < x <0.01 <0.01 <0.01 <0.01 <0.01 <0.015 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

69 APPEIX B Page 10 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 baseline standard constituent CAS Number unit GWPS ULTS FOR MW-5 average deviation date 12/20/12 6/26/13 6/16/16 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x Acetonitrile mg/l - x x x x x <0.1 x Acrolein mg/l - x x x x x <0.1 x Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.2 x Allyl chloride mg/l - x x x x x <0.01 x Benzene mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bis(chloromethyl) ether mg/l - x x x x x x x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.02 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x <0.05 x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 x Dichlorodifluoromethane mg/l <0.005 x Ethyl methacrylate mg/l - x x x x x <0.01 x Ethylbenzene mg/l 0.7 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l < < < < < < x Hexachlorobutadiene mg/l - x x x x x <0.01 x Isobutyl alcohol mg/l - x x x x x <0.05 x Isopropylbenzene mg/l - x x x x x < x Methacrylonitrile mg/l - x x x x x <0.005 x Methyl Iodide (Iodomethane) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.04 x Methyl methacrylate mg/l - x x x x x <0.03 x Methylene Chloride mg/l <0.001 <0.001 < < < <0.001 x n-butylbenzene mg/l - x x x x x < x Propionitrile mg/l - x x x x x <0.06 x Propylbenzene mg/l - x x x x x < x sec-butylbenzene mg/l - x x x x x < x Styrene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x tert-butyl methyl ether (MTBE) (a) mg/l 0.1 x x x x x <0.005 x tert-butylbenzene mg/l - x x x x x < x Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - x x x x x <0.01 x Toluene mg/l 0.75 <0.001 <0.001 <0.001 <0.001 < x Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 x trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x trans-1,4-dichloro-2-butene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x Trichloroethene (TCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Trichlorofluoromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 x < < < < < < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x x x x x x <0.01 x x x x x x <0.005 x x x x x x <0.01 x x x x x x <0.005 x x x x x x <0.01 x x x x x x <0.01 x x x x x x x x x x x x x <0.005 x x x x x x <0.005 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.05 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.02 x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

70 APPEIX B Page 11 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 baseline standard constituent CAS Number unit GWPS ULTS FOR MW-5 average deviation date 12/20/12 6/26/13 6/16/16 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 7,12-Dimethylbenz (a) anthracene mg/l - x x x x x <0.01 x Acenaphthene mg/l - x x x x x <0.01 x Acenaphthylene mg/l - x x x x x <0.01 x Acetophenone mg/l - x x x x x <0.01 x alpha,alpha-dimethylphenethylamine mg/l - x x x x x <0.01 x Aniline mg/l - x x x x x <0.01 x Anthracene mg/l - x x x x x <0.01 x Benzidine mg/l - x x x x x <0.05 x Benzo (a) anthracene mg/l - x x x x x <0.01 x Benzo (a) pyrene mg/l - x x x x x <0.02 x Benzo (b) fluoranthene mg/l - x x x x x <0.01 x Benzo (g,h,i) perylene mg/l - x x x x x <0.02 x Benzo (k) fluoranthene mg/l x x x x x < x Benzoic acid mg/l x x x x x <0.05 x Benzyl alcohol mg/l - x x x x x <0.01 x bis (2-Chloroethoxy) methane mg/l - x x x x x <0.01 x bis (2-Chloroethyl) ether mg/l - x x x x x <0.01 x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - x x x x x <0.01 x bis (2-Ethylhexyl) phthalate mg/l - x x x x x <0.02 x Butylbenzylphthalate mg/l - x x x x x <0.01 x Carbazole mg/l - x x x x x <0.005 x Chlorobenzilate mg/l - x x x x x <0.01 x Chrysene mg/l - x x x x x <0.01 x Diallate mg/l - x x x x x <0.01 x Dibenz (a,j) acridine mg/l - x x x x x <0.01 x Dibenzo (a,h) anthracene mg/l - x x x x x <0.01 x Dibenzofuran mg/l - x x x x x <0.01 x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x Diethylphthalate mg/l - x x x x x <0.01 x Dimethylphthalate mg/l - x x x x x <0.01 x Di-n-butylphthalate mg/l - x x x x x <0.01 x Di-n-octylphthalate mg/l - x x x x x <0.01 x Diphenylamine mg/l - x x x x x <0.01 x Ethyl methanesulfonate mg/l - x x x x x <0.02 x Fluoranthene mg/l - x x x x x <0.01 x Fluorene mg/l - x x x x x <0.01 x Hexachlorobenzene mg/l - x x x x x <0.001 x Hexachlorocyclopentadiene mg/l - x x x x x <0.01 x Hexachloroethane mg/l - x x x x x <0.05 x Hexachloropropene mg/l - x x x x x <0.01 x HMX mg/l - x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - x x x x x <0.01 x Isophorone mg/l - x x x x x <0.01 x Isosafrole mg/l - x x x x x <0.01 x m-dinitrobenzene (1,3-DNB) mg/l - x x x x x <0.02 x Methapyrilene mg/l - x x x x x <0.02 x Methyl methanesulfonate mg/l - x x x x x <0.01 x Naphthalene mg/l 0.03 x x x x x <0.01 x Nitrobenzene mg/l - x x x x x <0.01 x n-nitrosodiethylamine mg/l - x x x x x <0.02 x n-nitrosodimethylamine mg/l - x x x x x <0.002 x n-nitrosodi-n-butylamine mg/l - x x x x x <0.01 x n-nitrosodinpropylamine mg/l - x x x x x <0.01 x n-nitrosodiphenylamine mg/l - x x x x x <0.005 x n-nitrosomethylethylamine mg/l - x x x x x <0.01 x n-nitrosopiperidine mg/l - x x x x x <0.02 x n-nitrosopyrrolidine mg/l - x x x x x <0.04 x o-toluidine mg/l - x x x x x <0.002 x p-(dimethylamino) azobenzene mg/l - x x x x x <0.01 x Pentachlorobenzene mg/l - x x x x x <0.01 x Pentachloronitrobenzene mg/l - x x x x x <0.02 x Phenacetin mg/l - x x x x x <0.01 x Phenanthrene mg/l - x x x x x <0.001 x p-phenylenediamine mg/l - x x x x x <0.01 x Pronamide mg/l - x x x x x <0.01 x Pyrene mg/l - x x x x x <0.01 x Pyridine mg/l - x x x x x <0.01 x RDX mg/l - x x x x x x x Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.05 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

71 APPEIX B Page 12 of 12 Las Cruces Foothills Landfill MW-5 Las Cruces Foothills Landfill monitoring well MW-5 baseline standard constituent CAS Number unit GWPS ULTS FOR MW-5 average deviation date 12/20/12 6/26/13 6/16/16 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 2,6-Dichlorophenol mg/l - x x x x x <0.01 x 2-Chlorophenol mg/l - x x x x x <0.01 x 2-Methylphenol (o-cresol) mg/l - x x x x x <0.01 x 2-Nitrophenol (o-nitrophenol) mg/l - x x x x x <0.01 x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x x x x x <0.02 x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - x x x x x <0.05 x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - x x x x x <0.005 x 4-Nitrophenol (p-nitrophenol) mg/l - x x x x x <0.05 x Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex 1 (2,4,5-TP) mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in E 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. x x x x x <0.02 x x x x x x <0.01 x x x x x x <2.5 x x x x x x <2.5 x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.01 x x x x x x < x x x x x x alpha + x x x x x x < x x x x x x x x x x x x x < x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.001 x x x x x x < x x x x x x <0.001 x x x x x x < x x x x x x see above x x x x x x <0.001 x x x x x x <0.001 x x x x x x <0.02 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.001 x x x x x x < x x x x x x < x x x x x x < x x x x x x < x x x x x x < x x x x x x < x x x x x x < x x x x x x x x x x x x x <0.002 x x x x x x <0.01 x x x x x x <0.02 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.02 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.01 x x x x x x <0.002 x x x x x x <0.02 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

72 Mr. James Dyer September 27, 2017 MW-6 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

73 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS RESULTS FOR MW-6 Page 1 of 12 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 12/12/06 Field Parameters water level elevation ft amsl conductivity µs/cm - pumped dry ph ph units temperature deg F - pumped dry Major Ions calcium mg/l chloride mg/l fluoride mg/l x x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <20 <2.0 <2.0 <2.0 <2.0 <2.0 <4.0 <2.0 <2.0 total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Kjeldahl nitrogen mg/l - 2 <1.0 <1.0 <1.0 <1.0 <1.0 x x x nitrate as N mg/l nitrite mg/l - < x x x total nitrogen - mg/l - x x x x x x x x x Metals aluminum mg/l <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 x x antimony mg/l < <0.003 <0.003 <0.003 <0.003 <0.003 x x x arsenic mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x x x barium mg/l x x x beryllium mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 x x x boron mg/l 0.75 <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 x x x cadmium mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 x x x chromium mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x x x cobalt mg/l <0.03 <0.03 <0.03 <0.03 <0.03 x x x copper mg/l <0.06 <0.06 <0.06 <0.06 <0.06 x x x iron mg/l <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 lead mg/l 0.05 < <0.01 <0.01 <0.01 <0.01 <0.01 x x x manganese mg/l <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 mercury mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 x x x molybdenum mg/l 1.0 <0.010 <0.75 <0.75 <0.75 <0.75 <0.75 x x x nickel mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x x x selenium mg/l <0.005 <0.005 <0.005 <0.005 <0.005 x x x silver mg/l 0.05 <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x thallium mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 x x x tin mg/l - <0.10 x x x x <0.4 x x x uranium mg/l 0.03 <0.002 <2.5 <2.5 <2.5 <2.5 <2.5 x x x vanadium mg/l - <0.050 <0.08 <0.08 <0.08 <0.08 <0.08 x x x zinc mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x x x total organic carbon - mg/l - <0.5 <1.0 <1.0 <1.0 <0.5 <0.5 <0.5 < phosphate mg/l - x x x x x x x x x sulfide mg/l - <0.1 x x x x <4.0 x x x cyanide mg/l 0.2 <0.01 <0.1 <0.1 <0.1 <0.1 <0.1 x x x perchlorate mg/l - x x x x x x x x x total phenolics 1 - mg/l <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 Polychlorinated Biphenyls (PCBs) mg/l (^^) (^^) (^^) (^^) (^^) (^^) x x x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,1-Trichloroethane mg/l 0.06 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2,2-Tetrachloroethane mg/l 0.01 < <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2-Trichloroethane mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < ,1-Dichloroethane mg/l < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,1-Dichloropropene mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 x x x 1,2 Dibromo-3-chloropropane (DBCP) mg/l <0.010 < < < < < < < < ,2,3-Trichlorobenzene mg/l - < x x x x x x x x 1,2,3-Trichloropropane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2,4-Trichlorobenzene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2-Dichloroethane (EDC) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,2-Dichloropropane mg/l < < < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x 1,3-Dichloropropane mg/l - < <0.005 <0.01 <0.01 <0.01 <0.01 x x x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l < <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 < ,2-Dichloropropane mg/l - < < <0.015 <0.015 <0.015 <0.015 x x x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.025 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < Chlorotoluene mg/l - < x x x x x x x x 2-Hexanone (Butyl Ketone) mg/l - <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < Chlorotoluene mg/l - < x x x x x x x x 4-Methyl-2-pentanone mg/l - <0.025 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 Acetone mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Acetonitrile mg/l - <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 x x x Acrolein mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 x x x Acrylonitrile mg/l - <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 Allyl chloride mg/l - x <0.01 <0.01 <0.01 <0.01 <0.01 x x x Benzene mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

74 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS RESULTS FOR MW-6 Page 2 of 12 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 12/12/06 Bis(chloromethyl) ether mg/l - x x x x x x x x x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Bromomethane (methyl bromide) mg/l - <0.001 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Carbon Disulfide mg/l - <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Carbon Tetrachloride mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Chlorobenzene mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Chloroethane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Chloromethane (methyl chloride) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x x x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 cis-1,3-dichloropropene mg/l - < <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dibromomethane (methylene bromide) mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dichlorodifluoromethane mg/l < x <0.005 Ethyl methacrylate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Ethylbenzene mg/l 0.7 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l < < < < < < < < < Hexachlorobutadiene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x Isobutyl alcohol mg/l - <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 x x x Isopropylbenzene mg/l - < x x x x x x x x Methacrylonitrile mg/l - <0.025 <0.005 <0.005 <0.005 <0.005 <0.005 x x x Methyl Iodide (Iodomethane) mg/l - <0.005 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 Methyl methacrylate mg/l - <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 x x x Methylene Chloride mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 n-butylbenzene mg/l - < x x x x x x x x Propionitrile mg/l - <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 x x x Propylbenzene mg/l - < x x x x x x x x sec-butylbenzene mg/l - < x x x x x x x x Styrene mg/l 0.1 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.005 x x x x x x x x tert-butylbenzene mg/l - < x x x x x x x x Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - <0.010 x x x x x x x x Toluene mg/l <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 trans-1,2-dichloroethene mg/l 0.1 < <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 trans-1,4-dichloro-2-butene mg/l - <0.010 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Trichloroethene (TCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 < Trichlorofluoromethane mg/l - <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Vinyl acetate mg/l - <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 Vinyl chloride mg/l < < < < < < < < < Trihalomethanes (THM) Bromodichloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Bromoform mg/l - <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 Chloroform mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Dibromochloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 1,2-Diphenylhydrazine mg/l - <0.005 x x x x x x x x 1,4-Naphthoquinone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 1-Chloronaphthalene NA mg/l - <0.005 x x x x x x x x 1-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 1-Naphthylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x x 2-Acetylaminofluorene mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x x 2-Chloronaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 2-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 2-Naphthylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 2-Nitroaniline (o-nitroaniline) mg/l - <0.050 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 2-Picoline mg/l - <0.010 x x x x x x x x 3,3'-Dichlorobenzidine mg/l - <0.050 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 3,3'-Dimethylbenzidine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 3-Methylcholanthrene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 3-Nitroaniline (m-nitroaniline) mg/l - <0.050 <0.05 <0.05 <0.05 <0.05 <0.05 x x x 4-Aminobiphenyl mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x x 4-Bromophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 4-Chloroaniline (p-chloroanaline) mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x x 4-Chlorophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x 4-Nitroaniline (p-nitroaniline) mg/l - <0.050 <0.02 <0.02 <0.02 <0.02 <0.02 x x x 5-Nitro-o-toluidine mg/l - x x x x x x x x x 7,12-Dimethylbenz (a) anthracene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Acenaphthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Acenaphthylene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Acetophenone mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x alpha,alpha-dimethylphenethylamine mg/l - <0.010 x x x x x x x x Aniline mg/l - <0.010 x x x x x x x x Anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Benzidine mg/l - <0.050 x x x x x x x x Benzo (a) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Benzo (a) pyrene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Benzo (b) fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Benzo (g,h,i) perylene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

75 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS RESULTS FOR MW-6 Page 3 of 12 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 12/12/06 Benzo (k) fluoranthene mg/l <0.005 < < < < < x x x Benzoic acid mg/l <0.050 x x x x x x x x Benzyl alcohol mg/l - <0.020 <0.01 <0.01 <0.01 <0.01 <0.01 x x x bis (2-Chloroethoxy) methane mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x bis (2-Chloroethyl) ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x bis (2-Ethylhexyl) phthalate mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Butylbenzylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Carbazole mg/l - <0.005 x x x x x x x x Chlorobenzilate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Chrysene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Diallate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Dibenz (a,j) acridine mg/l - <0.010 x x x x x x x x Dibenzo (a,h) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Dibenzofuran mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x Diethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Dimethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Di-n-butylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Di-n-octylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Diphenylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Ethyl methanesulfonate mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Fluorene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Hexachlorobenzene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x x Hexachlorocyclopentadiene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Hexachloroethane mg/l - <0.005 <0.05 <0.05 <0.05 <0.05 <0.05 x x x Hexachloropropene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x HMX mg/l - x x x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Isophorone mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Isosafrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x m-dinitrobenzene (1,3-DNB) mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Methapyrilene mg/l - <0.1 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Methyl methanesulfonate mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Naphthalene mg/l 0.03 <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Nitrobenzene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x n-nitrosodiethylamine mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x x n-nitrosodimethylamine mg/l - <0.010 <0.002 <0.002 <0.002 <0.002 <0.002 x x x n-nitrosodi-n-butylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x n-nitrosodinpropylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x n-nitrosodiphenylamine mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x x n-nitrosomethylethylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x n-nitrosopiperidine mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x x n-nitrosopyrrolidine mg/l - <0.02 <0.04 <0.04 <0.04 <0.04 <0.04 x x x o-toluidine mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 x x x p-(dimethylamino) azobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Pentachlorobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Pentachloronitrobenzene mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Phenacetin mg/l - <0.020 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Phenanthrene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x x p-phenylenediamine mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Pronamide mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Pyridine mg/l - <0.010 x x x x x x x x RDX mg/l - x x x x x x x x x Safrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 x x x x 2,4,5-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2,4,6-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2,4-Dichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2,4-Dimethylphenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2,4-Dinitrophenol mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x x x 2,6-Dichlorophenol mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 x x x x 2-Chlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2-Methylphenol (o-cresol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 2-Nitrophenol (o-nitrophenol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - x <0.02 <0.02 <0.02 <0.02 x x x x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x x x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - <0.020 <0.005 <0.005 <0.005 <0.005 <0.005 x x x 4-Nitrophenol (p-nitrophenol) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 x x x x Pentachlorophenol mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 x x x x Phenol 1 (a) mg/l <0.005 <0.01 <0.01 <0.01 <0.01 x x x x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l <2.5 <2.5 <2.5 <2.5 <2.5 x x x Ra-228 1, total NA pci/l - <0.5 <2.5 <2.5 <2.5 <2.5 <2.5 x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x 4,4'-DDE (p,p'-dde) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x 4,4'-DDT (p,p'-ddt) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x aldrin mg/l - < <0.01 <0.0.1 <0.0.1 <0.0.1 <0.0.1 x x x alpha-bhc mg/l - < < < < < < x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

76 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS RESULTS FOR MW-6 Page 4 of 12 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 12/12/06 alpha-chlordane mg/l - < alpha + alpha + alpha + alpha + alpha + x x x beta-bhc mg/l - < < < < < < x x x Chlordane mg/l x x x x x x x x x delta-bhc mg/l - < < < < < < x x x Dieldrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Endosulfan I (alpha-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Endosulfan II (beta-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Endosulfan sulfate mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Endrin aldehyde mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Endrin ketone mg/l - < x x x x x x x x Endrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x gamma-bhc mg/l - < < < < < < x x x gamma-chlordane mg/l - < see above see above see above see above see above x x x Heptachlor epoxide mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Heptachlor mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x x Isodrin mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Kepone mg/l - <0.025 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Methoxychlor mg/l - <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Toxaphene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x x Polychlorinated Biphenyls (PCBs) Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Arochlor mg/l - < < < < < < x x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x <1.30 x x 2,4,5-T mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x x x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Dimethoate mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x x x Dinoseb mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x x Disulfoton mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x Famphur mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x x x Methyl parathion mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x o,o,o-triethyl phosphorothioate mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x x Parathion (Ethyl) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x Phorate mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x x Silvex 1 (2,4,5-TP) mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x x x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x <0.02 <0.02 <0.02 <0.02 <0.02 x x x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environmental Protection, subpart 803. Ground Water Sampling and Analysis, hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

77 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-6 Page 5 of 12 RESULTS FOR MW-6 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/20/12 6/26/13 6/16/16 Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l - Acetone mg/l - Acetonitrile mg/l - Acrolein mg/l - Acrylonitrile mg/l - Allyl chloride mg/l - Benzene mg/l x 0.56 x 0.55 x x x x x <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 < <0.5 <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 x <1.0 x x x x x x x x x x x x x x x x x 2.5 x x x x x x x x <0.02 x <0.020 x x x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x <0.003 x < <0.002 <0.002 <0.002 <0.002 x <0.04 x <0.04 x x x x x x <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x <0.006 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x <0.006 < < <0.006 <0.006 <0.006 <0.006 x < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.1 <0.05 <0.05 < <0.02 <0.02 <0.02 <0.02 x <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 < < x < x < x x x x x x <0.008 x <0.008 x x x x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x <0.001 < < <0.001 x <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.1 x x x x x x x x x x x x x x x x <0.05 <0.05 < <0.05 <0.05 <0.05 <0.05 x <0.02 <0.02 < <0.01 <0.01 <0.01 <0.01 < <1.0 < <1.0 x <0.50 x <0.50 x x x x x x 3 x x x x x x x x <0.005 x x x x x x x < < < < < < < < < x (^^) x x x x x x x <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.005 x x x x x x x < < < < < < < < < x x x x x x x x x <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < x <0.001 <0.001 x x x x x x x <0.01 x x x x x x x <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x <0.015 x x x x x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x <0.015 <0.015 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x <0.1 x x x x x x x x <0.1 x x x x x x x <0.2 <0.2 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x <0.01 x x x x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

78 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-6 Page 6 of 12 RESULTS FOR MW-6 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/20/12 6/26/13 6/16/16 Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l - Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (a) pyrene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - x (#) x x x x x x x <0.002 <0.002 <0.002 < <0.002 <0.002 <0.002 <0.002 <0.02 <0.02 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x <0.005 <0.005 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x <0.01 x x x x x x x <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < x <0.05 x x x x x x x x x x x x x x x x x <0.005 x x x x x x x <0.04 <0.04 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x <0.03 x x x x x x x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x x x x x x x x x x <0.06 x x x x x x x x x x x x x x x x x x x x x x x x x <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x x x x x x x <0.005 <0.005 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < < < < < < < < < <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

79 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-6 Page 7 of 12 RESULTS FOR MW-6 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/20/12 6/26/13 6/16/16 Benzo (k) fluoranthene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - x < x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x 0.45 x 0.2 x x x x x x x x 0.25 x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

80 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-6 Page 8 of 12 RESULTS FOR MW-6 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/20/12 6/26/13 6/16/16 alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex 1 (2,4,5-TP) mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environm 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

81 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l - Acetone mg/l - Acetonitrile mg/l - Acrolein mg/l - Acrylonitrile mg/l - Allyl chloride mg/l - Benzene mg/l baseline standard average deviation 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/ , x x <2.0 <2.0 <2.0 x <1.0 <1.0 <0.5 x x x 2.00 x x x x x x x x x 0.09 x <0.001 <0.001 <0.003 x x <0.002 <0.002 <0.002 x x x <0.5 x <0.002 <0.002 <0.002 x <0.006 < x <0.006 < x <0.006 < x <0.02 < x < < <0.01 x x x x <0.001 x x x <0.75 x <0.01 < x <0.001 < x <0.005 <0.005 <0.01 x < < <0.001 x x x <0.4 x x x <2.5 x <0.05 <0.05 <0.08 x <0.01 < x < <0.5 x x x x x x x <4.0 x x x <0.1 x x x x x < < x x x (^^) x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.002 x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.001 x x x <0.005 x < < < x x x < x <0.001 <0.001 <0.01 x x x <0.01 x <0.001 <0.001 <0.01 x <0.001 <0.001 <0.001 x < < < x x x <0.01 x x x <0.01 x <0.001 <0.001 <0.015 x x x <0.015 x <0.01 <0.01 <0.01 x x x < x <0.01 <0.01 <0.05 x x x < x <0.01 <0.01 <0.015 x <0.01 <0.01 <0.1 x x x <0.1 x x x <0.1 x <0.01 <0.01 <0.2 x x x <0.01 x <0.001 <0.001 <0.001 x Page 9 of 12 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

82 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l Hexachlorobutadiene mg/l - Isobutyl alcohol mg/l - Isopropylbenzene mg/l - Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (a) pyrene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - baseline standard average deviation 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 x x x x <0.002 <0.002 <0.002 x <0.002 <0.002 <0.02 x <0.01 <0.01 <0.1 x <0.001 <0.001 <0.002 x <0.001 <0.001 <0.005 x <0.002 <0.002 <0.01 x <0.001 <0.001 <0.001 x x x <0.05 x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.02 x <0.001 <0.001 <0.02 x x x <0.01 x <0.001 <0.001 <0.005 x < < < x x x <0.01 x x x <0.05 x x x < x x x <0.005 x <0.01 <0.01 <0.04 x x x <0.03 x < < <0.001 x x x < x x x <0.06 x x x < x x x < x <0.001 <0.001 <0.01 x x x <0.005 x x x < x x x <0.010 x <0.001 <0.001 <0.005 x <0.002 <0.002 <0.005 x <0.001 <0.001 <0.002 x <0.001 <0.001 <0.01 x <0.01 <0.01 <0.1 x <0.001 <0.001 <0.001 x <0.001 <0.001 <0.01 x <0.01 <0.01 <0.05 x < < < x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.015 x <0.001 <0.001 <0.005 x <0.001 <0.001 <0.005 x x x <0.01 x x x <0.005 x x x <0.01 x x x <0.005 x x x <0.01 x x x <0.01 x x x x x x x <0.005 x x x <0.005 x x x <0.02 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.05 x x x <0.02 x x x <0.01 x x x <0.02 x x x <0.01 x x x <0.02 x x x x x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.05 x x x <0.01 x x x <0.02 x x x <0.01 x x x <0.02 x Page 10 of 12 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

83 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 constituent CAS Number unit GWPS date Benzo (k) fluoranthene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - baseline standard average deviation 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 x x < x x x <0.05 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.01 x x x <0.005 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x x x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.01 x x x <0.01 x x x <0.001 x x x <0.01 x x x <0.05 x x x <0.01 x x x x x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.02 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.002 x x x <0.01 x x x <0.01 x x x <0.005 x x x <0.01 x x x <0.02 x x x <0.04 x x x <0.002 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.01 x x x <0.001 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x x x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.05 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.01 x x x <0.02 x x x <0.05 x x x <0.005 x x x <0.05 x x x <0.02 x x x <0.01 x x x <2.5 x x x <2.5 x x x <0.001 x x x <0.001 x x x <0.001 x x x <0.0.1 x x x < x Page 11 of 12 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

84 APPEIX B Las Cruces Foothills Landfill MW-6 Las Cruces Foothills Landfill monitoring well MW-6 baseline standard constituent CAS Number unit GWPS average deviation date 12/27/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 alpha-chlordane mg/l - x x alpha + x beta-bhc mg/l - x x < x Chlordane mg/l x x x x delta-bhc mg/l - x x < x Dieldrin mg/l - x x <0.001 x Endosulfan I (alpha-endosulfan) mg/l - x x <0.001 x Endosulfan II (beta-endosulfan) mg/l - x x <0.001 x Endosulfan sulfate mg/l - x x <0.001 x Endrin aldehyde mg/l - x x <0.001 x Endrin ketone mg/l - x x < x Endrin mg/l - x x <0.001 x gamma-bhc mg/l - x x < x gamma-chlordane mg/l - x x see above x Heptachlor epoxide mg/l - x x <0.001 x Heptachlor mg/l - x x <0.001 x Isodrin mg/l - x x <0.02 x Kepone mg/l - x x <0.02 x Methoxychlor mg/l - x x <0.01 x Toxaphene mg/l - x x <0.001 x Polychlorinated Biphenyls (PCBs) Arochlor mg/l - x x < x Arochlor mg/l - x x < x Arochlor mg/l - x x < x Arochlor mg/l - x x < x Arochlor mg/l - x x < x Arochlor mg/l - x x < x Arochlor mg/l - x x < x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x 2,4,5-T mg/l - x x <0.002 x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - x x <0.01 x Dimethoate mg/l - x x <0.02 x Dinoseb mg/l - x x <0.02 x Disulfoton mg/l - x x <0.01 x Famphur mg/l - x x <0.02 x Methyl parathion mg/l - x x <0.01 x o,o,o-triethyl phosphorothioate mg/l - x x <0.01 x Parathion (Ethyl) mg/l - x x <0.01 x Phorate mg/l - x x <0.01 x Silvex 1 (2,4,5-TP) mg/l - x x <0.002 x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x x <0.02 x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environm 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. Page 12 of 12 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

85 Mr. James Dyer September 27, 2017 MW-7 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

86 APPEIX B Las Cruces Foothills Landfill MW-7 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS RESULTS FOR MW-7 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 Page 1 of 9 Field Parameters water level elevation ft amsl conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <20 <2.0 <2.0 <2.0 <2.0 <2.0 <4.0 <2.0 total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Kjeldahl nitrogen mg/l - <1 <1.0 <1.0 <1.0 <1.0 <1.0 x x nitrate as N mg/l <1.0 <1.0 <1.0 <1.0 < <1.0 nitrite mg/l - <0.1 <1.0 <1.0 <1.0 <1.0 <1.0 x x total nitrogen - mg/l - x x x x x x x x Metals aluminum mg/l <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 x antimony mg/l < <0.003 <0.003 <0.003 <0.003 <0.003 x x arsenic mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x x barium mg/l < x x beryllium mg/l <0.002 <0.002 <0.002 <0.002 <0.002 x x boron mg/l 0.75 <0.1 <0.5 <0.5 <0.5 <0.5 <0.5 x x cadmium mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 x x chromium mg/l <0.01 <0.01 <0.01 <0.01 <0.01 x x cobalt mg/l <0.03 <0.03 <0.03 <0.03 <0.03 x x copper mg/l <0.06 <0.06 <0.06 <0.06 <0.06 x x iron mg/l <0.1 <0.1 <0.1 < <0.1 lead mg/l 0.05 < <0.01 <0.01 <0.01 <0.01 <0.01 x x manganese mg/l <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 mercury mg/l <0.001 <0.001 <0.001 <0.001 <0.001 x x molybdenum mg/l 1.0 <0.010 <0.75 <0.75 <0.75 <0.75 <0.75 x x nickel mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x x selenium mg/l <0.005 <0.005 <0.005 <0.005 <0.005 x x silver mg/l 0.05 <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x thallium mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 x x tin mg/l - <0.10 x x x x <0.4 x x uranium mg/l <2.5 <2.5 <2.5 <2.5 <2.5 x x vanadium mg/l - <0.050 <0.08 <0.08 <0.08 <0.08 <0.08 x x zinc mg/l <0.05 <0.05 <0.05 <0.05 <0.05 x x total organic carbon - mg/l <1.0 <1.0 < < <0.5 phosphate mg/l - x x x x x x x x sulfide mg/l - <0.1 x x x x <4.0 x x cyanide mg/l 0.2 <0.01 <0.1 <0.1 <0.1 <0.1 <0.1 x x perchlorate mg/l - x x x x x x x x total phenolics 1 - mg/l <0.005 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 Polychlorinated Biphenyls (PCBs) mg/l (^^) (^^) (^^) (^^) (^^) (^^) x x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,1-Trichloroethane mg/l 0.06 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2,2-Tetrachloroethane mg/l 0.01 < <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1,2-Trichloroethane mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 < ,1-Dichloroethane mg/l < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 < ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,1-Dichloropropene mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 x x 1,2 Dibromo-3-chloropropane (DBCP) mg/l <0.010 < < < < < x x 1,2,3-Trichlorobenzene mg/l - < x x x x x x x 1,2,3-Trichloropropane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2,4-Trichlorobenzene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 1,2-Dichloroethane (EDC) mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < ,2-Dichloropropane mg/l < < < < < < < < ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x 1,3-Dichloropropane mg/l - < <0.005 <0.01 <0.01 <0.01 <0.01 x x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l < <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 < ,2-Dichloropropane mg/l - < < <0.015 <0.015 <0.015 <0.015 x x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.025 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < Chlorotoluene mg/l - < x x x x x x x 2-Hexanone (Butyl Ketone) mg/l - <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < Chlorotoluene mg/l - < x x x x x x x 4-Methyl-2-pentanone mg/l - <0.025 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 Acetone mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Acetonitrile mg/l - <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.2 <0.2 Acrolein mg/l - <0.025 <0.1 <0.1 <0.1 <0.1 <0.1 x x Acrylonitrile mg/l - <0.025 <0.2 <0.2 <0.2 <0.2 <0.2 x x Allyl chloride mg/l - x <0.01 <0.01 <0.01 <0.01 <0.01 x x Benzene mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Bis(chloromethyl) ether mg/l - x x x x x x x x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Bromomethane (methyl bromide) mg/l - <0.001 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Carbon Disulfide mg/l - <0.005 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Carbon Tetrachloride mg/l < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Chlorobenzene mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Chloroethane mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Chloromethane (methyl chloride) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Chloroprene (2-Chloro-1,3-butadiene) mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 cis-1,3-dichloropropene mg/l - < <0.001 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dibromomethane (methylene bromide) mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Dichlorodifluoromethane mg/l x Ethyl methacrylate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x Ethylbenzene mg/l 0.7 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < < < < < x x Hexachlorobutadiene mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

87 APPEIX B Las Cruces Foothills Landfill MW-7 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS RESULTS FOR MW-7 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 Page 2 of 9 Isobutyl alcohol mg/l - <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 x x Isopropylbenzene mg/l - < x x x x x x x Methacrylonitrile mg/l - <0.025 <0.005 <0.005 <0.005 <0.005 <0.005 x x Methyl Iodide (Iodomethane) mg/l - <0.005 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 Methyl methacrylate mg/l - <0.03 <0.03 <0.03 <0.03 <0.03 <0.03 x x Methylene Chloride mg/l < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 n-butylbenzene mg/l - < x x x x x x x Propionitrile mg/l - <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 x x Propylbenzene mg/l - < x x x x x x x sec-butylbenzene mg/l - < x x x x x x x Styrene mg/l 0.1 < <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.005 x x x x x x x tert-butylbenzene mg/l - < x x x x x x x Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - <0.01 x x x x x x x Toluene mg/l <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.001 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 trans-1,2-dichloroethene mg/l 0.1 < <0.005 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 trans-1,4-dichloro-2-butene mg/l - <0.01 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Vinyl acetate mg/l - <0.025 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 Vinyl chloride mg/l < < < < < < < < Trihalomethanes (THM) Bromodichloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Bromoform mg/l - <0.001 <0.001 <0.015 <0.015 <0.015 <0.015 <0.015 <0.015 Chloroform mg/l 0.1 < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Dibromochloromethane mg/l - < <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x 1,2-Diphenylhydrazine mg/l - <0.005 x x x x x x x 1,4-Naphthoquinone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x 1-Chloronaphthalene NA mg/l - <0.005 x x x x x x x 1-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x 1-Naphthylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x 2,4,6-Trinitrotoluene (TNT) mg/l - x x x x x x x x 2,4-Dinitrotoluene (2,4-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x 2-Acetylaminofluorene mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x 2-Chloronaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x 2-Methylnaphthalene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x 2-Naphthylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x 2-Nitroaniline (o-nitroaniline) mg/l - <0.050 <0.01 <0.01 <0.01 <0.01 <0.01 x x 2-Picoline mg/l - <0.010 x x x x x x x 3,3'-Dichlorobenzidine mg/l - <0.050 <0.01 <0.01 <0.01 <0.01 <0.01 x x 3,3'-Dimethylbenzidine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x 3-Methylcholanthrene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x 3-Nitroaniline (m-nitroaniline) mg/l - <0.050 <0.05 <0.05 <0.05 <0.05 <0.05 x x 4-Aminobiphenyl mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x 4-Bromophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x 4-Chloroaniline (p-chloroanaline) mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x 4-Chlorophenylphenyl ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x 4-Nitroaniline (p-nitroaniline) mg/l - <0.050 <0.02 <0.02 <0.02 <0.02 <0.02 x x 5-Nitro-o-toluidine mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x x 7,12-Dimethylbenz (a) anthracene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Acenaphthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Acenaphthylene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Acetophenone mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x alpha,alpha-dimethylphenethylamine mg/l - <0.010 x x x x x x x Aniline mg/l - <0.010 x x x x x x x Anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Benzidine mg/l - <0.050 x x x x x x x Benzo (a) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Benzo (a) pyrene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x Benzo (b) fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Benzo (g,h,i) perylene mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x Benzo (k) fluoranthene mg/l <0.005 < < < < < x x Benzoic acid mg/l <0.050 x x x x x x x Benzyl alcohol mg/l - <0.020 <0.01 <0.01 <0.01 <0.01 <0.01 x x bis (2-Chloroethoxy) methane mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x bis (2-Chloroethyl) ether mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ethe mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x bis (2-Ethylhexyl) phthalate mg/l <0.02 <0.02 <0.02 <0.02 <0.02 x x Butylbenzylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Carbazole mg/l - <0.005 x x x x x x x Chlorobenzilate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x Chrysene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Diallate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x Dibenz (a,j) acridine mg/l - <0.010 x x x x x x x Dibenzo (a,h) anthracene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Dibenzofuran mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x Diethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Dimethylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Di-n-butylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Di-n-octylphthalate mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Diphenylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Ethyl methanesulfonate mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x Fluoranthene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Fluorene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Hexachlorobenzene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x Hexachlorocyclopentadiene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Hexachloroethane mg/l - <0.005 <0.05 <0.05 <0.05 <0.05 <0.05 x x Hexachloropropene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x HMX mg/l - x x x x x x x x Indeno (1,2,3-cd) pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Isophorone mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Isosafrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x m-dinitrobenzene (1,3-DNB) mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x Methapyrilene mg/l - <0.1 <0.02 <0.02 <0.02 <0.02 <0.02 x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

88 APPEIX B Las Cruces Foothills Landfill MW-7 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS RESULTS FOR MW-7 date 7/15/03 8/27/03 9/29/03 10/27/03 11/25/03 12/29/03 12/2/04 12/14/05 Page 3 of 9 Methyl methanesulfonate mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Naphthalene mg/l 0.03 <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Nitrobenzene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x n-nitrosodiethylamine mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x n-nitrosodimethylamine mg/l - <0.010 <0.002 <0.002 <0.002 <0.002 <0.002 x x n-nitrosodi-n-butylamine mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x n-nitrosodinpropylamine mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x n-nitrosodiphenylamine mg/l - <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x x n-nitrosomethylethylamine mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x n-nitrosopiperidine mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x n-nitrosopyrrolidine mg/l - <0.02 <0.04 <0.04 <0.04 <0.04 <0.04 x x o-toluidine mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 x x p-(dimethylamino) azobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Pentachlorobenzene mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Pentachloronitrobenzene mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 <0.02 x x Phenacetin mg/l - <0.020 <0.01 <0.01 <0.01 <0.01 <0.01 x x Phenanthrene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x p-phenylenediamine mg/l - <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 x x Pronamide mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Pyrene mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Pyridine mg/l - <0.010 x x x x x x x RDX mg/l - x x x x x x x x Safrole mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 x x x 2,4,5-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2,4,6-Trichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2,4-Dichlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2,4-Dimethylphenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2,4-Dinitrophenol mg/l - <0.050 <0.05 <0.05 <0.05 <0.05 x x x 2,6-Dichlorophenol mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 x x x 2-Chlorophenol mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2-Methylphenol (o-cresol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 2-Nitrophenol (o-nitrophenol) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 x x x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 x x x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - <0.050 <0.05 <0.05 <0.05 <0.05 x x x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - <0.020 <0.005 <0.005 <0.005 <0.005 <0.005 x x 4-Nitrophenol (p-nitrophenol) mg/l - <0.050 <0.05 <0.05 <0.05 <0.05 x x x Pentachlorophenol mg/l - <0.020 <0.02 <0.02 <0.02 <0.02 x x x Phenol 1 (a) mg/l <0.005 <0.01 <0.01 <0.01 <0.01 x x x Radium 226 and 228 NA pci/l Ra-226, total NA pci/l <2.5 <2.5 <2.5 <2.5 <2.5 x x Ra-228 1, total NA pci/l <2.5 <2.5 <2.5 <2.5 <2.5 x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - < <0.01 <0.0.1 <0.0.1 <0.0.1 <0.0.1 x x 4,4'-DDE (p,p'-dde) mg/l - < < < < < < x x 4,4'-DDT (p,p'-ddt) mg/l - < < < < < < x x aldrin mg/l - < < < < < < x x alpha-bhc mg/l - < < < < < < x x alpha-chlordane mg/l - < alpha + alpha + alpha + alpha + alpha + x x beta-bhc mg/l - < see above see above see above see above see above x x Chlordane mg/l x x x x x x x x delta-bhc mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Dieldrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endosulfan I (alpha-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endosulfan II (beta-endosulfan) mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endosulfan sulfate mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endrin aldehyde mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endrin ketone mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Endrin mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x gamma-bhc mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x gamma-chlordane mg/l - < x x x x x x x Heptachlor epoxide mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Heptachlor mg/l - < <0.001 <0.001 <0.001 <0.001 <0.001 x x Isodrin mg/l - <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 x x Kepone mg/l - <0.025 <0.02 <0.02 <0.02 <0.02 <0.02 x x Methoxychlor mg/l - <0.001 <0.01 <0.01 <0.01 <0.01 <0.01 x x Toxaphene mg/l - <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 x x Polychlorinated Biphenyls (PCBs) Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Arochlor mg/l - < < < < < < x x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 x x x x x x x x 2,4,5-T mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - <0.005 <0.01 <0.01 <0.01 <0.01 <0.01 x x Dimethoate mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x x Dinoseb mg/l - <0.005 <0.02 <0.02 <0.02 <0.02 <0.02 x x Disulfoton mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x Famphur mg/l - < <0.02 <0.02 <0.02 <0.02 <0.02 x x Methyl parathion mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x o,o,o-triethyl phosphorothioate mg/l - <0.010 <0.01 <0.01 <0.01 <0.01 <0.01 x x Parathion (Ethyl) mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x Phorate mg/l - < <0.01 <0.01 <0.01 <0.01 <0.01 x x Silvex 1 (2,4,5-TP) mg/l - <0.001 <0.002 <0.002 <0.002 <0.002 <0.002 x x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - x <0.02 <0.02 <0.02 <0.02 <0.02 x x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environmental Protection, subpart 803. Ground Water Sampling and Analysis, hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

89 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-7 RESULTS FOR MW-7 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/19/12 6/26/13 Page 4 of 9 Field Parameters water level elevation ft amsl - conductivity µs/cm - ph ph units 6-9 temperature deg F - Major Ions calcium mg/l - chloride mg/l 250 fluoride mg/l 1.6 magnesium mg/l - potassium mg/l - sodium mg/l - sulfate mg/l 600 alkalinity NA mg/l - bicarbonate alkalinity mg/l - carbonate alkalinity mg/l - total dissolved solids NA mg/l 1,000 Nitrogen Species ammonia as N mg/l - Kjeldahl nitrogen mg/l - nitrate as N mg/l 10 nitrite mg/l - total nitrogen - mg/l - Metals aluminum mg/l 5.0 antimony mg/l arsenic mg/l 0.01 barium mg/l 1.0 beryllium mg/l boron mg/l 0.75 cadmium mg/l chromium mg/l 0.05 cobalt mg/l 0.05 copper mg/l 1.0 iron mg/l 1.0 lead mg/l 0.05 manganese mg/l 0.2 mercury mg/l molybdenum mg/l 1.0 nickel mg/l 0.2 selenium mg/l 0.05 silver mg/l 0.05 thallium mg/l tin mg/l - uranium mg/l 0.03 vanadium mg/l - zinc mg/l 10.0 total organic carbon - mg/l - phosphate mg/l - sulfide mg/l - cyanide mg/l 0.2 perchlorate mg/l - total phenolics 1 - mg/l Polychlorinated Biphenyls (PCBs) mg/l Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - 1,1,1-Trichloroethane mg/l ,1,2,2-Tetrachloroethane mg/l ,1,2-Trichloroethane mg/l ,1-Dichloroethane mg/l ,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l ,1-Dichloropropene mg/l - 1,2 Dibromo-3-chloropropane (DBCP) mg/l ,2,3-Trichlorobenzene mg/l - 1,2,3-Trichloropropane mg/l - 1,2,4-Trichlorobenzene mg/l - 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 1,2-Dichloroethane (EDC) mg/l ,2-Dichloropropane mg/l ,3-Dichlorobenzene (m-dichlorobenzene) mg/l - 1,3-Dichloropropane mg/l - 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l ,2-Dichloropropane mg/l - 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - 2-Chlorotoluene mg/l - 2-Hexanone (Butyl Ketone) mg/l - 4-Chlorotoluene mg/l - 4-Methyl-2-pentanone mg/l - Acetone mg/l - Acetonitrile mg/l - Acrolein mg/l - Acrylonitrile mg/l - Allyl chloride mg/l - Benzene mg/l Bis(chloromethyl) ether mg/l - Bromochloromethane mg/l - Bromomethane (methyl bromide) mg/l - Carbon Disulfide mg/l - Carbon Tetrachloride mg/l Chlorobenzene mg/l 0.1 Chloroethane mg/l - Chloromethane (methyl chloride) mg/l - Chloroprene (2-Chloro-1,3-butadiene) mg/l - cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 cis-1,3-dichloropropene mg/l - Dibromomethane (methylene bromide) mg/l - Dichlorodifluoromethane mg/l - Ethyl methacrylate mg/l - Ethylbenzene mg/l 0.7 Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 Hexachlorobutadiene mg/l x x 0.69 x 0.65 x x x x <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 < <0.5 <0.5 <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 x x <1.0 x x x x x x x x x x x x x x x x x 1.1 x x x x x x x x <0.02 x 0.04 x x x x x x <0.001 <0.001 < < < <0.001 x x <0.002 < < < x x x x <0.003 x < <0.002 <0.002 <0.002 x x <0.04 x <0.04 x x x x x x <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 x x <0.006 < < <0.006 <0.006 <0.006 x x <0.006 < < <0.006 <0.006 <0.006 x x <0.006 <0.006 <0.006 <0.006 <0.1 <0.1 < <0.02 x x <0.005 < <0.005 <0.005 <0.005 <0.005 <0.001 <0.03 < x x < x < x x x x x x <0.008 x <0.008 x x x x x x < < <0.01 <0.01 <0.01 x x < < < x x <0.005 < <0.005 <0.005 <0.005 <0.005 <0.005 x x <0.001 <0.001 <0.001 <0.001 < < <0.001 x x <0.1 x x x x x x x x x x x x x x x x <0.05 <0.050 < <0.05 <0.05 <0.05 x x <0.02 <0.020 < <0.01 <0.01 <0.01 <0.5 <1.0 <1.0 <1.0 < <1.0 <1.0 <1.0 x x <0.50 x <0.50 x x x x x x 2 x x x x x x x x <0.005 x x x x x x <0.003 < < < < < < < < x x (^^) x x x x x x <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.001 < <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 x x <0.005 x x x x x x x x < < < < < < < x x x x x x x x x <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < < < < < < < < < x x <0.001 <0.001 x x x x x x x <0.01 x x x x x x <0.015 <0.015 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.015 x x x x x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x x x x x x x x <0.015 <0.015 <0.015 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.2 <0.2 <0.1 x x x x x x x x <0.1 x x x x x x x x <0.2 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x <0.01 x x x x x x <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 x x (#) x x x x x x <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.02 <0.02 <0.02 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x <0.005 <0.005 < < <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 <0.02 <0.02 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < x x <0.01 x x x x x x <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x < < < E-06 < < < WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

90 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-7 RESULTS FOR MW-7 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/19/12 6/26/13 Page 5 of 9 Isobutyl alcohol mg/l - Isopropylbenzene mg/l - Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (a) pyrene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ethe mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - x x <0.05 x x x x x x x x x x x x x x x x x <0.005 x x x x x x <0.04 <0.04 <0.04 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x x <0.03 x x x x x x <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 x x x x x x x x x x x <0.06 x x x x x x x x x x x x x x x x x x x x x x x x <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x x x x x x x x x x x x x x x x x x <0.005 <0.005 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.005 <0.005 <0.002 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.001 < <0.001 <0.001 <0.001 <0.01 <0.01 <0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.1 <0.1 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 < <0.01 < <0.05 <0.05 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < < < < < < < <0.005 <0.005 <0.005 <0.001 < < < < < <0.015 <0.015 <0.015 <0.001 < < < < < <0.005 <0.005 <0.005 <0.001 < < < < < <0.005 <0.005 <0.005 <0.001 < < < < < x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

91 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-7 RESULTS FOR MW-7 12/12/06 1/18/08 12/23/08 12/29/09 12/29/10 12/28/11 6/19/12 12/19/12 6/26/13 Page 6 of 9 Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex 1 (2,4,5-TP) mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environ 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. x x < x x x x x x x x x x x x x x x 2.02 x x 0.12 x x x x x x x x 1.9 x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x x x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x x x < x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

92 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date APPEIX B Las Cruces Foothills Landfill MW-7 baseline standard RESULTS FOR MW-7 average deviation 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/28/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 Field Parameters water level elevation ft amsl , conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l 1.6 x x 0.60 x x x x x 0.76 <0.001 magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 x total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <0.5 x Kjeldahl nitrogen mg/l - x x <1.0 x x x x x <1.0 x nitrate as N mg/l 10 < <1.0 x nitrite mg/l - x x x x x x x x <1.0 x total nitrogen - mg/l - x x <1.0 x x x x x x x Metals aluminum mg/l 5.0 x x x x x x x <3.0 x antimony mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.003 x arsenic mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x barium mg/l beryllium mg/l <0.002 <0.003 <0.002 <0.003 <0.002 <0.002 <0.002 <0.002 <0.002 x boron mg/l 0.75 x x <0.04 x x x x x <0.5 x cadmium mg/l <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x chromium mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.01 x cobalt mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.03 x copper mg/l 1.0 <0.006 <0.006 <0.006 <0.006 <0.006 < <0.006 <0.06 x iron mg/l 1.0 <0.02 < < < lead mg/l 0.05 <0.001 <0.005 <0.001 <0.005 < < < < <0.01 x manganese mg/l <0.03 x mercury mg/l x x < x x x x x <0.001 x molybdenum mg/l 1.0 x x <0.008 x x x x x <0.75 x nickel mg/l 0.2 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 x selenium mg/l <0.005 <0.005 < <0.005 x silver mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.01 x thallium mg/l <0.001 <0.001 <0.001 < < < < < <0.001 x tin mg/l - x x x x x x x x <0.4 x uranium mg/l 0.03 x x x x x x x <2.5 x vanadium mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.08 x zinc mg/l 10.0 <0.01 <0.02 <0.01 <0.02 <0.01 <0.01 < <0.05 x total organic carbon - mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 < phosphate mg/l - x x <0.50 x x x x x x x sulfide mg/l - x x x x x x x x <4.0 x cyanide mg/l 0.2 x x <0.01 x x x x x <0.1 x perchlorate mg/l - x x x x x x x x x x total phenolics 1 - mg/l < < < < < < < < <0.003 x Polychlorinated Biphenyls (PCBs) mg/l x x (^^) x x x x x (^^) x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x 1,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x 1,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x 1,1,2-Trichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x 1,1-Dichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x 1,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloropropene mg/l - x x x x x x x x <0.005 x 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < < x 1,2,3-Trichlorobenzene mg/l - x x x x x x x x < x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x 1,2,4-Trichlorobenzene mg/l - x x x x x x x x <0.01 x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x 1,2-Dichloroethane (EDC) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloropropane mg/l < < < < < < < < < x 1,3-Dichlorobenzene (m-dichlorobenzene) mg/l - x x x x x x x x <0.01 x 1,3-Dichloropropane mg/l - x x x x x x x x <0.01 x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.015 x 2,2-Dichloropropane mg/l - x x x x x x x x <0.015 x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Chlorotoluene mg/l - x x x x x x x x < x 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 x 4-Chlorotoluene mg/l - x x x x x x x x < x 4-Methyl-2-pentanone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.015 x Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x Acetonitrile mg/l - x x x x x x x x <0.1 x Acrolein mg/l - x x x x x x x x <0.1 x Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.2 x Allyl chloride mg/l - x x x x x x x x <0.01 x Benzene mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bis(chloromethyl) ether mg/l - x x x x x x x x x x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.02 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.01 x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroprene (2-Chloro-1,3-butadiene) mg/l - x x x x x x x x <0.05 x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l <0.005 x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.02 x Dichlorodifluoromethane mg/l Ethyl methacrylate mg/l - x x x x x x x x <0.01 x Ethylbenzene mg/l 0.7 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l 5E-05 < < < < < < < < < x Hexachlorobutadiene mg/l - Page 7 of 9 x x x x x x x x <0.01 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

93 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date Isobutyl alcohol mg/l - Isopropylbenzene mg/l - Methacrylonitrile mg/l - Methyl Iodide (Iodomethane) mg/l - Methyl methacrylate mg/l - Methylene Chloride mg/l n-butylbenzene mg/l - Propionitrile mg/l - Propylbenzene mg/l - sec-butylbenzene mg/l - Styrene mg/l 0.1 tert-butyl methyl ether (MTBE) (a) mg/l 0.1 tert-butylbenzene mg/l - Tetrachloroethene (PCE) mg/l Tetrahydrofuran (THF) mg/l - Toluene mg/l 0.75 Total Xylenes (m&p and o) 1 NA mg/l 0.62 trans-1,2-dichloroethene mg/l 0.1 trans-1,3-dichloropropene mg/l - trans-1,4-dichloro-2-butene mg/l - Trichloroethene (TCE) mg/l Trichlorofluoromethane mg/l - Vinyl acetate mg/l - Vinyl chloride mg/l Trihalomethanes (THM) Bromodichloromethane mg/l - Bromoform mg/l - Chloroform mg/l 0.1 Dibromochloromethane mg/l - Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - 1,2-Diphenylhydrazine mg/l - 1,4-Naphthoquinone mg/l - 1-Chloronaphthalene NA mg/l - 1-Methylnaphthalene mg/l - 1-Naphthylamine mg/l - 2,4,6-Trinitrotoluene (TNT) mg/l - 2,4-Dinitrotoluene (2,4-DNT) mg/l - 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - 2-Acetylaminofluorene mg/l - 2-Chloronaphthalene mg/l - 2-Methylnaphthalene mg/l - 2-Naphthylamine mg/l - 2-Nitroaniline (o-nitroaniline) mg/l - 2-Picoline mg/l - 3,3'-Dichlorobenzidine mg/l - 3,3'-Dimethylbenzidine mg/l - 3-Methylcholanthrene mg/l - 3-Nitroaniline (m-nitroaniline) mg/l - 4-Aminobiphenyl mg/l - 4-Bromophenylphenyl ether mg/l - 4-Chloroaniline (p-chloroanaline) mg/l - 4-Chlorophenylphenyl ether mg/l - 4-Nitroaniline (p-nitroaniline) mg/l - 5-Nitro-o-toluidine mg/l - 7,12-Dimethylbenz (a) anthracene mg/l - Acenaphthene mg/l - Acenaphthylene mg/l - Acetophenone mg/l - alpha,alpha-dimethylphenethylamine mg/l - Aniline mg/l - Anthracene mg/l - Benzidine mg/l - Benzo (a) anthracene mg/l - Benzo (a) pyrene mg/l - Benzo (b) fluoranthene mg/l - Benzo (g,h,i) perylene mg/l - Benzo (k) fluoranthene mg/l Benzoic acid mg/l Benzyl alcohol mg/l - bis (2-Chloroethoxy) methane mg/l - bis (2-Chloroethyl) ether mg/l - bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ethe mg/l - bis (2-Ethylhexyl) phthalate mg/l - Butylbenzylphthalate mg/l - Carbazole mg/l - Chlorobenzilate mg/l - Chrysene mg/l - Diallate mg/l - Dibenz (a,j) acridine mg/l - Dibenzo (a,h) anthracene mg/l - Dibenzofuran mg/l - Diethylene Glycol Monobutyl Ether mg/l - Diethylphthalate mg/l - Dimethylphthalate mg/l - Di-n-butylphthalate mg/l - Di-n-octylphthalate mg/l - Diphenylamine mg/l - Ethyl methanesulfonate mg/l - Fluoranthene mg/l - Fluorene mg/l - Hexachlorobenzene mg/l - Hexachlorocyclopentadiene mg/l - Hexachloroethane mg/l - Hexachloropropene mg/l - HMX mg/l - Indeno (1,2,3-cd) pyrene mg/l - Isophorone mg/l - Isosafrole mg/l - m-dinitrobenzene (1,3-DNB) mg/l - Methapyrilene mg/l - APPEIX B Las Cruces Foothills Landfill MW-7 baseline standard RESULTS FOR MW-7 average deviation 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/28/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 x x x x x x x x <0.05 x x x x x x x x x < x x x x x x x x x <0.005 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.04 x x x x x x x x x <0.03 x <0.001 <0.001 < < < < < < <0.001 x x x x x x x x x < x x x x x x x x x <0.06 x x x x x x x x x < x x x x x x x x x < x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x x x x x x x x x <0.005 x x x x x x x x x < x x x x x x x x x <0.01 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.005 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 x <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.1 x x <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 x < < < < < < < < x < < < < < < < < <0.005 x < < < < < < < < <0.015 x < < < < < < < < <0.005 x < < < < < < < < <0.005 x x x x x x x x x <0.01 x x x x x x x x x <0.005 x x x x x x x x x <0.01 x x x x x x x x x <0.005 x x x <0.002 x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x x x x x x x x x x x <0.005 x x x x x x x x x <0.005 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x <0.002 x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.05 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.05 x x x x x x x x x <0.01 x x x < x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x < x x x x x x x x x <0.05 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.005 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x x x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.001 x x x x x x x x x <0.01 x x x x x x x x x <0.05 x x x x x x x x x <0.01 x x x x x x x x x x x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x Page 8 of 9 x x x x x x x x <0.02 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

94 Las Cruces Foothills Landfill monitoring well MW-7 constituent CAS Number unit GWPS date Methyl methanesulfonate mg/l - Naphthalene mg/l 0.03 Nitrobenzene mg/l - n-nitrosodiethylamine mg/l - n-nitrosodimethylamine mg/l - n-nitrosodi-n-butylamine mg/l - n-nitrosodinpropylamine mg/l - n-nitrosodiphenylamine mg/l - n-nitrosomethylethylamine mg/l - n-nitrosopiperidine mg/l - n-nitrosopyrrolidine mg/l - o-toluidine mg/l - p-(dimethylamino) azobenzene mg/l - Pentachlorobenzene mg/l - Pentachloronitrobenzene mg/l - Phenacetin mg/l - Phenanthrene mg/l - p-phenylenediamine mg/l - Pronamide mg/l - Pyrene mg/l - Pyridine mg/l - RDX mg/l - Safrole mg/l - sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - 2,4,5-Trichlorophenol mg/l - 2,4,6-Trichlorophenol mg/l - 2,4-Dichlorophenol mg/l - 2,4-Dimethylphenol mg/l - 2,4-Dinitrophenol mg/l - 2,6-Dichlorophenol mg/l - 2-Chlorophenol mg/l - 2-Methylphenol (o-cresol) mg/l - 2-Nitrophenol (o-nitrophenol) mg/l - 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - 4-Nitrophenol (p-nitrophenol) mg/l - Pentachlorophenol mg/l - Phenol 1 (a) mg/l Radium 226 and 228 NA pci/l 5 Ra-226, total NA pci/l - Ra-228 1, total NA pci/l - Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - 4,4'-DDE (p,p'-dde) mg/l - 4,4'-DDT (p,p'-ddt) mg/l - aldrin mg/l - alpha-bhc mg/l - alpha-chlordane mg/l - beta-bhc mg/l - Chlordane mg/l delta-bhc mg/l - Dieldrin mg/l - Endosulfan I (alpha-endosulfan) mg/l - Endosulfan II (beta-endosulfan) mg/l - Endosulfan sulfate mg/l - Endrin aldehyde mg/l - Endrin ketone mg/l - Endrin mg/l - gamma-bhc mg/l - gamma-chlordane mg/l - Heptachlor epoxide mg/l - Heptachlor mg/l - Isodrin mg/l - Kepone mg/l - Methoxychlor mg/l - Toxaphene mg/l - Polychlorinated Biphenyls (PCBs) Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Arochlor mg/l - Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l ,4,5-T mg/l - 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - Dimethoate mg/l - Dinoseb mg/l - Disulfoton mg/l - Famphur mg/l - Methyl parathion mg/l - o,o,o-triethyl phosphorothioate mg/l - Parathion (Ethyl) mg/l - Phorate mg/l - Silvex 1 (2,4,5-TP) mg/l - o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in Environ 1 hazardous x parameter not analyzed (^^) See section entitled 'Polychlorinated Biphenyls (PCBs)' for break-out of PCB concentrations. (#) Scanned for and not detected, breaks down almost immediately in water. APPEIX B Las Cruces Foothills Landfill MW-7 baseline standard RESULTS FOR MW-7 average deviation 12/19/13 6/26/14 12/11/14 6/18/15 12/17/15 6/16/16 12/28/16 6/27/17 7/15/03 to 7/15/03 to 12/2/04 12/2/04 x x x x x x x x <0.01 x x x <0.002 x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.002 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.005 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.04 x x x x x x x x x <0.002 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.001 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x x x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.05 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.05 x x x x x x x x x <0.005 x x x x x x x x x <0.05 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x 2.47 x x x x x x x <2.5 x x x 2.06 x x x x x <2.5 x x x x x x x x x <0.0.1 x x x x x x x x x < x x x x x x x x x < x x x x x x x x x < x x x x x x x x x < x x x x x x x x x alpha + x x x x x x x x x see above x x x x x x x x x x x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x < x x x x x x x x x <0.001 x x x x x x x x x <0.001 x x x x x x x x x <0.02 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.001 x x x < x x x x x < x x x < x x x x x < x x x < x x x x x < x x x < x x x x x < x x x < x x x x x < x x x < x x x x x < x x x < x x x x x < x x x x x x x x x x x x x x x x x x x <0.002 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.02 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.01 x x x x x x x x x <0.002 x x x x x x x x x <0.02 x Page 9 of 9 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

95 Mr. James Dyer September 27, 2017 MW-8 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

96 APPEIX B Las Cruces Foothills Landfill MW-8 Page 1 of 4 Las Cruces Foothills Landfill monitoring well MW-8 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-8 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/29/10 to 12/29/10 to 12/29/11 12/29/11 Field Parameters water level elevation ft amsl , conductivity µs/cm ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 x total dissolved solids NA mg/l 1, Nitrogen Species ammonia as N mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 x Kjeldahl nitrogen mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 x x <1.0 x nitrate as N mg/l x x x x x x nitrite mg/l - x x x x x x x x x total nitrogen - mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 x x <1.0 x Metals aluminum mg/l x x antimony mg/l <0.001 <0.001 <0.001 <0.001 <0.001 < x arsenic mg/l 0.01 < barium mg/l beryllium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.001 x boron mg/l 0.75 <0.04 <0.04 <0.04 <0.04 <0.04 x x <0.04 x cadmium mg/l <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x chromium mg/l 0.05 < <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x cobalt mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x copper mg/l 1.0 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x iron mg/l 1.0 < <0.05 <0.05 <0.05 < x lead mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.005 x manganese mg/l < < mercury mg/l < < < < < x x < x molybdenum mg/l <0.008 <0.008 <0.008 x x nickel mg/l 0.2 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x selenium mg/l 0.05 <0.001 <0.001 < <0.001 <0.001 < x silver mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 x thallium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x tin mg/l - <0.01 x x x x x x <0.01 x uranium mg/l 0.03 <0.001 <0.001 <0.001 <0.001 <0.001 x x <0.001 x vanadium mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x zinc mg/l 10.0 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.01 <0.02 x total organic carbon - mg/l phosphate mg/l - <0.5 <0.5 <0.5 <0.5 <0.5 x x <0.5 x sulfide mg/l - <0.1 x x x x x x <0.1 x cyanide mg/l 0.2 <0.01 <0.01 <0.01 <0.02 <0.01 x x <0.02 x perchlorate mg/l x x x x x x total phenolics 1 - mg/l < < < < < < < < x Polychlorinated Biphenyls (PCBs) mg/l < < < < < x x < x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2-Trichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloropropene mg/l - <0.001 x x x x x x <0.001 x 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < x 1,2,3-Trichlorobenzene mg/l - x x x x x x x x x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2,4-Trichlorobenzene mg/l - <0.01 x x x x x x <0.01 x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloroethane (EDC) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloropropane mg/l < < < < < < < < x 1,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 x x x x x x <0.001 x 1,3-Dichloropropane mg/l - <0.001 x x x x x x <0.001 x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 2,2-Dichloropropane mg/l - <0.001 x x x x x x <0.001 x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Chlorotoluene mg/l - x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

97 APPEIX B Las Cruces Foothills Landfill MW-8 Page 2 of 4 Las Cruces Foothills Landfill monitoring well MW-8 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-8 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/29/10 to 12/29/10 to 12/29/11 12/29/11 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 4-Chlorotoluene mg/l - x x x x x x x x x 4-Methyl-2-pentanone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acetonitrile mg/l - <0.1 x x x x x x <0.1 x Acrolein mg/l - <0.1 x x x x x x <0.1 x Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Allyl chloride mg/l - <0.01 x x x x x x <0.01 x Benzene mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bis(chloromethyl) ether mg/l - (#) x x x x x x (#) x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroprene (2-Chloro-1,3-butadiene) mg/l - <0.05 x x x x x x <0.05 x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dichlorodifluoromethane mg/l - <0.001 <0.001 <0.001 <0.001 < <0.001 x Ethyl methacrylate mg/l - <0.01 x x x x x x <0.01 x Ethylbenzene mg/l 0.7 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l < < < < < < < < x Hexachlorobutadiene mg/l - <0.01 x x x x x x <0.01 x Isobutyl alcohol mg/l - <0.05 x x x x x x <0.05 x Isopropylbenzene mg/l - x x x x x x x x x Methacrylonitrile mg/l - <0.005 x x x x x x <0.005 x Methyl Iodide (Iodomethane) mg/l - <0.01 x x x x x x <0.01 x Methyl methacrylate mg/l - <0.03 x x x x x x <0.03 x Methylene Chloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x n-butylbenzene mg/l - x x x x x x x x x Propionitrile mg/l - <0.06 x x x x x x <0.06 x Propylbenzene mg/l - x x x x x x x x x sec-butylbenzene mg/l - x x x x x x x x x Styrene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.001 x x x x x x <0.001 x tert-butylbenzene mg/l - x x x x x x x x x Tetrachloroethene (PCE) mg/l < Tetrahydrofuran (THF) mg/l - x x x x x x x x x Toluene mg/l 0.75 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,4-dichloro-2-butene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Trichloroethene (TCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Trichlorofluoromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Vinyl acetate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Vinyl chloride mg/l < < < < < < < < x Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bromoform mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroform mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromochloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - <0.01 x x x x x x <0.01 x 1,2-Diphenylhydrazine mg/l - <0.01 x x x x x x <0.01 x 1,4-Naphthoquinone mg/l - <0.01 x x x x x x <0.01 x 1-Chloronaphthalene NA mg/l - x x x x x x x x x 1-Methylnaphthalene mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 x x <0.01 x 1-Naphthylamine mg/l - <0.01 x x x x x x <0.01 x 2,4,6-Trinitrotoluene (TNT) mg/l - < < < x x x x < x 2,4-Dinitrotoluene (2,4-DNT) mg/l - < < < x x x x < x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - < < < x x x x < x 2-Acetylaminofluorene mg/l - <0.01 x x x x x x <0.01 x 2-Chloronaphthalene mg/l - <0.01 x x x x x x <0.01 x 2-Methylnaphthalene mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 x x <0.01 x 2-Naphthylamine mg/l - <0.01 x x x x x x <0.01 x 2-Nitroaniline (o-nitroaniline) mg/l - <0.01 x x x x x x <0.01 x 2-Picoline mg/l - <0.01 x x x x x x <0.01 x 3,3'-Dichlorobenzidine mg/l - <0.01 x x x x x x <0.01 x 3,3'-Dimethylbenzidine mg/l - <0.01 x x x x x x <0.01 x 3-Methylcholanthrene mg/l - <0.01 x x x x x x <0.01 x 3-Nitroaniline (m-nitroaniline) mg/l - <0.01 x x x x x x <0.01 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

98 APPEIX B Las Cruces Foothills Landfill MW-8 Page 3 of 4 Las Cruces Foothills Landfill monitoring well MW-8 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-8 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/29/10 to 12/29/10 to 12/29/11 12/29/11 4-Aminobiphenyl mg/l - <0.01 x x x x x x <0.01 x 4-Bromophenylphenyl ether mg/l - <0.01 x x x x x x <0.01 x 4-Chloroaniline (p-chloroanaline) mg/l - <0.01 x x x x x x <0.01 x 4-Chlorophenylphenyl ether mg/l - <0.01 x x x x x x <0.01 x 4-Nitroaniline (p-nitroaniline) mg/l - <0.01 x x x x x x <0.01 x 5-Nitro-o-toluidine mg/l - <0.01 x x x x x x <0.01 x 7,12-Dimethylbenz (a) anthracene mg/l - <0.01 x x x x x x <0.01 x Acenaphthene mg/l - <0.01 x x x x x x <0.01 x Acenaphthylene mg/l - <0.01 x x x x x x <0.01 x Acetophenone mg/l x x x x x x x alpha,alpha-dimethylphenethylamine mg/l - <0.01 x x x x x x <0.01 x Aniline mg/l - <0.01 x x x x x x <0.01 x Anthracene mg/l - <0.01 x x x x x x <0.01 x Benzidine mg/l - <0.01 x x x x x x <0.01 x Benzo (a) anthracene mg/l - < x x x x x x < x Benzo (a) pyrene mg/l < < < < < x x < x Benzo (b) fluoranthene mg/l - < x x x x x x < x Benzo (g,h,i) perylene mg/l - <0.01 x x x x x x <0.01 x Benzo (k) fluoranthene mg/l - < x x x x x x < x Benzoic acid mg/l - x x x x x x x x x Benzyl alcohol mg/l - <0.01 x x x x x x <0.01 x bis (2-Chloroethoxy) methane mg/l - <0.01 x x x x x x <0.01 x bis (2-Chloroethyl) ether mg/l - <0.01 x x x x x x <0.01 x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - <0.01 x x x x x x <0.01 x bis (2-Ethylhexyl) phthalate mg/l - <0.005 x x x x x x <0.005 x Butylbenzylphthalate mg/l - <0.01 x x x x x x <0.01 x Carbazole mg/l - <0.01 x x x x x x <0.01 x Chlorobenzilate mg/l - <0.01 x x x x x x <0.01 x Chrysene mg/l - < x x x x x x < x Diallate mg/l - <0.01 x x x x x x <0.01 x Dibenz (a,j) acridine mg/l - x x x x x x x x x Dibenzo (a,h) anthracene mg/l - < x x x x x x < x Dibenzofuran mg/l - <0.01 x x x x x x <0.01 x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x Diethylphthalate mg/l - <0.01 x x x x x x <0.01 x Dimethylphthalate mg/l - <0.01 x x x x x x <0.01 x Di-n-butylphthalate mg/l - <0.01 x x x x x x <0.01 x Di-n-octylphthalate mg/l - <0.01 x x x x x x <0.01 x Diphenylamine mg/l - <0.01 x x x x x x <0.01 x Ethyl methanesulfonate mg/l - <0.01 x x x x x x <0.01 x Fluoranthene mg/l - <0.01 x x x x x x <0.01 x Fluorene mg/l - <0.01 x x x x x x <0.01 x Hexachlorobenzene mg/l - <0.001 x x x x x x <0.001 x Hexachlorocyclopentadiene mg/l - <0.01 x x x x x x <0.01 x Hexachloroethane mg/l - <0.01 x x x x x x <0.01 x Hexachloropropene mg/l - <0.01 x x x x x x <0.01 x HMX mg/l < < x x x x < x Indeno (1,2,3-cd) pyrene mg/l - < x x x x x x < x Isophorone mg/l - <0.01 x x x x x x <0.01 x Isosafrole mg/l - <0.01 x x x x x x <0.01 x m-dinitrobenzene (1,3-DNB) mg/l - < < < x x x x < x Methapyrilene mg/l - <0.01 x x x x x x <0.01 x Methyl methanesulfonate mg/l - <0.01 x x x x x x <0.01 x Naphthalene mg/l 0.03 <0.01 <0.002 <0.002 <0.002 <0.002 x x <0.01 x Nitrobenzene mg/l - <0.01 < < x x x x <0.01 x n-nitrosodiethylamine mg/l - <0.01 x x x x x x <0.01 x n-nitrosodimethylamine mg/l - <0.01 x x x x x x <0.01 x n-nitrosodi-n-butylamine mg/l - <0.01 x x x x x x <0.01 x n-nitrosodinpropylamine mg/l - <0.01 x x x x x x <0.01 x n-nitrosodiphenylamine mg/l - <0.002 x x x x x x <0.002 x n-nitrosomethylethylamine mg/l - <0.002 x x x x x x <0.002 x n-nitrosopiperidine mg/l - <0.01 x x x x x x <0.01 x n-nitrosopyrrolidine mg/l - <0.01 x x x x x x <0.01 x o-toluidine mg/l - <0.002 x x x x x x <0.002 x p-(dimethylamino) azobenzene mg/l - <0.01 x x x x x x <0.01 x Pentachlorobenzene mg/l - <0.01 x x x x x x <0.01 x Pentachloronitrobenzene mg/l - <0.01 x x x x x x <0.01 x Phenacetin mg/l - <0.01 x x x x x x <0.01 x Phenanthrene mg/l - <0.01 x x x x x x <0.01 x p-phenylenediamine mg/l - <0.01 x x x x x x <0.01 x Pronamide mg/l - <0.01 x x x x x x <0.01 x Pyrene mg/l - <0.01 x x x x x x <0.01 x Pyridine mg/l - <0.01 x x x x x x <0.01 x RDX mg/l < < x x x x < x Safrole mg/l - <0.01 x x x x x x <0.01 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

99 APPEIX B Las Cruces Foothills Landfill MW-8 Page 4 of 4 Las Cruces Foothills Landfill monitoring well MW-8 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-8 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/29/10 to 12/29/10 to 12/29/11 12/29/11 sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - < < < x x x x < x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - <0.01 x x x x x x <0.01 x 2,4,5-Trichlorophenol mg/l - <0.01 x x x x x x <0.01 x 2,4,6-Trichlorophenol mg/l - <0.01 x x x x x x <0.01 x 2,4-Dichlorophenol mg/l - <0.01 x x x x x x <0.01 x 2,4-Dimethylphenol mg/l - <0.01 x x x x x x <0.01 x 2,4-Dinitrophenol mg/l - <0.01 x x x x x x <0.01 x 2,6-Dichlorophenol mg/l - <0.01 x x x x x x <0.01 x 2-Chlorophenol mg/l - <0.01 x x x x x x <0.01 x 2-Methylphenol (o-cresol) mg/l - <0.01 x x x x x x <0.01 x 2-Nitrophenol (o-nitrophenol) mg/l - <0.01 x x x x x x <0.01 x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - <0.01 x x x x x x <0.01 x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - <0.01 x x x x x x <0.01 x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - <0.005 x x x x x x <0.005 x 4-Nitrophenol (p-nitrophenol) mg/l - <0.01 x x x x x x <0.01 x Pentachlorophenol mg/l - <0.01 x x x x x x <0.01 x Phenol 1 (a) mg/l <0.01 x x x x x x <0.01 x Radium 226 and 228 NA pci/l x x Ra-226, total NA pci/l x x Ra-228 1, total NA pci/l x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - <0.01 x x x x x x <0.01 x 4,4'-DDE (p,p'-dde) mg/l - < x x x x x x < x 4,4'-DDT (p,p'-ddt) mg/l - < x x x x x x < x aldrin mg/l - < x x x x x x < x alpha-bhc mg/l - < x x x x x x < x alpha-chlordane mg/l - x x x x x x x x x beta-bhc mg/l - < x x x x x x < x Chlordane mg/l <0.005 x x x x x x <0.005 x delta-bhc mg/l - < x x x x x x < x Dieldrin mg/l - <0.001 x x x x x x <0.001 x Endosulfan I (alpha-endosulfan) mg/l - <0.001 x x x x x x <0.001 x Endosulfan II (beta-endosulfan) mg/l - <0.001 x x x x x x <0.001 x Endosulfan sulfate mg/l - <0.001 x x x x x x <0.001 x Endrin aldehyde mg/l - <0.001 x x x x x x <0.001 x Endrin ketone mg/l - x x x x x x x x x Endrin mg/l - <0.001 x x x x x x <0.001 x gamma-bhc mg/l - < x x x x x x < x gamma-chlordane mg/l - x x x x x x x x x Heptachlor epoxide mg/l - <0.001 x x x x x x <0.001 x Heptachlor mg/l - <0.001 x x x x x x <0.001 x Isodrin mg/l - <0.01 x x x x x x <0.01 x Kepone mg/l - <0.01 x x x x x x <0.01 x Methoxychlor mg/l - <0.01 x x x x x x <0.01 x Toxaphene mg/l - <0.001 x x x x x x <0.001 x Polychlorinated Biphenyls (PCBs) 1 Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Arochlor mg/l - < < < < < x x < x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 < x x x x x x < x 2,4,5-T mg/l - < x x x x x x < x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - < x x x x x x < x Dimethoate mg/l - <0.01 x x x x x x <0.01 x Dinoseb mg/l - < x x x x x x < x Disulfoton mg/l - <0.01 x x x x x x <0.01 x Famphur mg/l - <0.005 x x x x x x <0.005 x Methyl parathion mg/l - <0.01 x x x x x x <0.01 x o,o,o-triethyl phosphorothioate mg/l - <0.01 x x x x x x <0.01 x Parathion (Ethyl) mg/l - <0.01 x x x x x x <0.01 x Phorate mg/l - <0.01 x x x x x x <0.01 x Silvex 1 (2,4,5-TP) mg/l - < x x x x x x < x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - <0.01 x x x x x x <0.01 x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in EPA, Subpart 803., Ground Water Sampling and Analysis, hazardous x parameter not analyzed (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

100 Mr. James Dyer September 27, 2017 MW-9 WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

101 APPEIX B Las Cruces Foothills Landfill MW-9 Page 1 of 4 Las Cruces Foothills Landfill monitoring well MW-9 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-9 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/28/16 6/28/17 12/29/10 to 12/29/10 to 12/29/11 12/29/11 Field Parameters water level elevation ft amsl , conductivity µs/cm , ph ph units temperature deg F Major Ions calcium mg/l chloride mg/l fluoride mg/l x x x x magnesium mg/l potassium mg/l sodium mg/l sulfate mg/l alkalinity NA mg/l bicarbonate alkalinity mg/l carbonate alkalinity mg/l - <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 x total dissolved solids NA mg/l 1, , Nitrogen Species ammonia as N mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 x Kjeldahl nitrogen mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 x x x x <1.0 x nitrate as N mg/l x x x x <0.1 < <1.0 x x nitrite mg/l - x x x x x x x x x x x total nitrogen - mg/l - <1.0 <1.0 <1.0 <1.0 <1.0 x x x x <1.0 x Metals aluminum mg/l 5.0 <0.02 <0.02 < <0.02 x x x x x antimony mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x arsenic mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 <0.001 <0.001 x barium mg/l beryllium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 <0.002 <0.002 <0.002 <0.001 x boron mg/l x x x x cadmium mg/l <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x chromium mg/l 0.05 <0.006 <0.006 < <0.006 <0.006 < <0.006 x cobalt mg/l 0.05 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x copper mg/l 1.0 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 x iron mg/l lead mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 <0.001 < <0.005 x manganese mg/l mercury mg/l < < < < < x x x x < x molybdenum mg/l <0.008 <0.008 x x x x nickel mg/l selenium mg/l 0.05 <0.001 <0.001 < <0.001 < x silver mg/l 0.05 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.025 <0.005 <0.005 <0.005 x thallium mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 < <0.001 x tin mg/l - <0.01 x x x x x x x x <0.01 x uranium mg/l x x x x vanadium mg/l - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 x zinc mg/l 10.0 <0.02 <0.02 < < total organic carbon - mg/l < <1.0 <1.0 <1.0 < phosphate mg/l - <0.5 <0.5 <0.5 <0.5 <0.5 x x x x <0.5 x sulfide mg/l - <0.1 x x x x x x x x <0.1 x cyanide mg/l 0.2 <0.01 <0.01 <0.01 <0.02 <0.01 x x x x <0.02 x perchlorate mg/l - < < x x x x x x x < x total phenolics 1 - mg/l < < < < < < < < < < x Polychlorinated Biphenyls (PCBs) mg/l < < < < < x x x x < x Volatile Organic Compounds 1,1,1,2-Tetrachloroethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,1-Trichloroethane mg/l 0.06 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2,2-Tetrachloroethane mg/l 0.01 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1,2-Trichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloroethane mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloroethylene (1,1-Dichloroethene; 1,1-DCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,1-Dichloropropene mg/l - <0.001 x x x x x x x x <0.001 x 1,2 Dibromo-3-chloropropane (DBCP) mg/l < < < < < < < < < < x 1,2,3-Trichlorobenzene mg/l - x x x x x x x x x x x 1,2,3-Trichloropropane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2,4-Trichlorobenzene mg/l - <0.01 x x x x x x x x <0.01 x 1,2-Dichlorobenzene (o-dichlorobenzene) mg/l 0.6 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloroethane (EDC) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 1,2-Dichloropropane mg/l < < < < < < < < < < x 1,3-Dichlorobenzene (m-dichlorobenzene) mg/l - <0.001 x x x x x x x x <0.001 x 1,3-Dichloropropane mg/l - <0.001 x x x x x x x x <0.001 x 1,4-Dichlorobenzene (p-dichlorobenzene) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x 2,2-Dichloropropane mg/l - <0.001 x x x x x x x x <0.001 x 2-Butanone (Methyl Ethyl Ketone) (MEK) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 2-Chlorotoluene mg/l - x x x x x x x x x x x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

102 APPEIX B Las Cruces Foothills Landfill MW-9 Page 2 of 4 Las Cruces Foothills Landfill monitoring well MW-9 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-9 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/28/16 6/28/17 12/29/10 to 12/29/10 to 12/29/11 12/29/11 2-Hexanone (Butyl Ketone) mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x 4-Chlorotoluene mg/l - x x x x x x x x x x x 4-Methyl-2-pentanone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acetone mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Acetonitrile mg/l - <0.1 x x x x x x x x <0.1 x Acrolein mg/l - <0.1 x x x x x x x x <0.1 x Acrylonitrile mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Allyl chloride mg/l - <0.01 x x x x x x x x <0.01 x Benzene mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bis(chloromethyl) ether mg/l - (#) x x x x x x x x (#) x Bromochloromethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Bromomethane (methyl bromide) mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Carbon Disulfide mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Carbon Tetrachloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chlorobenzene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroethane mg/l - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x Chloromethane (methyl chloride) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroprene (2-Chloro-1,3-butadiene) mg/l - <0.05 x x x x x x x x <0.05 x cis-1,2-dichloroethylene (cis-1,2-dichloroethene) mg/l 0.07 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x cis-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromomethane (methylene bromide) mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dichlorodifluoromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Ethyl methacrylate mg/l - <0.01 x x x x x x x x <0.01 x Ethylbenzene mg/l 0.7 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Ethylene Dibromide (1,2-Dibromoethane) (EDB) mg/l < < < < < < < < < < x Hexachlorobutadiene mg/l - <0.01 x x x x x x x x <0.01 x Isobutyl alcohol mg/l - <0.05 x x x x x x x x <0.05 x Isopropylbenzene mg/l - x x x x x x x x x x x Methacrylonitrile mg/l - <0.005 x x x x x x x x <0.005 x Methyl Iodide (Iodomethane) mg/l - <0.01 x x x x x x x x <0.01 x Methyl methacrylate mg/l - <0.03 x x x x x x x x <0.03 x Methylene Chloride mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x n-butylbenzene mg/l - x x x x x x x x x x x Propionitrile mg/l - <0.06 x x x x x x x x <0.06 x Propylbenzene mg/l - x x x x x x x x x x x sec-butylbenzene mg/l - x x x x x x x x x x x Styrene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x tert-butyl methyl ether (MTBE) (a) mg/l 0.1 <0.001 x x x x x x x x <0.001 x tert-butylbenzene mg/l - x x x x x x x x x x x Tetrachloroethene (PCE) mg/l < < < < < < < < < < x Tetrahydrofuran (THF) mg/l - x x x x x x x x x x x Toluene mg/l 0.75 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Total Xylenes (m&p and o) 1 NA mg/l 0.62 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 x trans-1,2-dichloroethene mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,3-dichloropropene mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x trans-1,4-dichloro-2-butene mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Trichloroethene (TCE) mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Trichlorofluoromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Vinyl acetate mg/l - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 x Vinyl chloride mg/l < < < < < < < < < < x Trihalomethanes (THM) Bromodichloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Bromoform mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Chloroform mg/l 0.1 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Dibromochloromethane mg/l - <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 x Semi Volatile Organic Compounds 1,2,4,5-Tetrachlorobenzene mg/l - <0.01 x x x x x x x x <0.01 x 1,2-Diphenylhydrazine mg/l - <0.01 x x x x x x x x <0.01 x 1,4-Naphthoquinone mg/l - <0.01 x x x x x x x x <0.01 x 1-Chloronaphthalene NA mg/l - x x x x x x x x x x x 1-Methylnaphthalene mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 x x x x <0.01 x 1-Naphthylamine mg/l - <0.01 x x x x x x x x <0.01 x 2,4,6-Trinitrotoluene (TNT) mg/l - < < < x x x x x x < x 2,4-Dinitrotoluene (2,4-DNT) mg/l - < < < x x x x x x < x 2,6-Dinitrotoluene 1 (2,6-DNT) mg/l - < < < x x x x x x < x 2-Acetylaminofluorene mg/l - <0.01 x x x x x x x x <0.01 x 2-Chloronaphthalene mg/l - <0.01 x x x x x x x x <0.01 x 2-Methylnaphthalene mg/l - <0.01 <0.002 <0.002 <0.002 <0.002 x x x x <0.01 x 2-Naphthylamine mg/l - <0.01 x x x x x x x x <0.01 x 2-Nitroaniline (o-nitroaniline) mg/l - <0.01 x x x x x x x x <0.01 x 2-Picoline mg/l - <0.01 x x x x x x x x <0.01 x 3,3'-Dichlorobenzidine mg/l - <0.01 x x x x x x x x <0.01 x 3,3'-Dimethylbenzidine mg/l - <0.01 x x x x x x x x <0.01 x 3-Methylcholanthrene mg/l - <0.01 x x x x x x x x <0.01 x 3-Nitroaniline (m-nitroaniline) mg/l - <0.01 x x x x x x x x <0.01 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

103 APPEIX B Las Cruces Foothills Landfill MW-9 Page 3 of 4 Las Cruces Foothills Landfill monitoring well MW-9 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-9 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/28/16 6/28/17 12/29/10 to 12/29/10 to 12/29/11 12/29/11 4-Aminobiphenyl mg/l - <0.01 x x x x x x x x <0.01 x 4-Bromophenylphenyl ether mg/l - <0.01 x x x x x x x x <0.01 x 4-Chloroaniline (p-chloroanaline) mg/l - <0.01 x x x x x x x x <0.01 x 4-Chlorophenylphenyl ether mg/l - <0.01 x x x x x x x x <0.01 x 4-Nitroaniline (p-nitroaniline) mg/l - <0.01 x x x x x x x x <0.01 x 5-Nitro-o-toluidine mg/l - <0.01 x x x x x x x x <0.01 x 7,12-Dimethylbenz (a) anthracene mg/l - <0.01 x x x x x x x x <0.01 x Acenaphthene mg/l - <0.01 x x x x x x x x <0.01 x Acenaphthylene mg/l - <0.01 x x x x x x x x <0.01 x Acetophenone mg/l - <0.01 x x x x x x x x <0.01 x alpha,alpha-dimethylphenethylamine mg/l - <0.01 x x x x x x x x <0.01 x Aniline mg/l - <0.01 x x x x x x x x <0.01 x Anthracene mg/l - <0.01 x x x x x x x x <0.01 x Benzidine mg/l - <0.01 x x x x x x x x <0.01 x Benzo (a) anthracene mg/l - < x x x x x x x x < x Benzo (a) pyrene mg/l < < < < < x x x x < x Benzo (b) fluoranthene mg/l - < x x x x x x x x < x Benzo (g,h,i) perylene mg/l - <0.01 x x x x x x x x <0.01 x Benzo (k) fluoranthene mg/l - < x x x x x x x x < x Benzoic acid mg/l - x x x x x x x x x x x Benzyl alcohol mg/l - <0.01 x x x x x x x x <0.01 x bis (2-Chloroethoxy) methane mg/l - <0.01 x x x x x x x x <0.01 x bis (2-Chloroethyl) ether mg/l - <0.01 x x x x x x x x <0.01 x bis (2-Chloroisopropyl) ether (bis (2-chloro-1-methylethyl) ether) mg/l - <0.01 x x x x x x x x <0.01 x bis (2-Ethylhexyl) phthalate mg/l - <0.005 x x x x x x x x <0.005 x Butylbenzylphthalate mg/l - <0.01 x x x x x x x x <0.01 x Carbazole mg/l - <0.01 x x x x x x x x <0.01 x Chlorobenzilate mg/l - <0.01 x x x x x x x x <0.01 x Chrysene mg/l - < x x x x x x x x < x Diallate mg/l - <0.01 x x x x x x x x <0.01 x Dibenz (a,j) acridine mg/l - x x x x x x x x x x x Dibenzo (a,h) anthracene mg/l - < x x x x x x x x < x Dibenzofuran mg/l - <0.01 x x x x x x x x <0.01 x Diethylene Glycol Monobutyl Ether mg/l - x x x x x x x x x x x Diethylphthalate mg/l - <0.01 x x x x x x x x <0.01 x Dimethylphthalate mg/l - <0.01 x x x x x x x x <0.01 x Di-n-butylphthalate mg/l - <0.01 x x x x x x x x <0.01 x Di-n-octylphthalate mg/l - <0.01 x x x x x x x x <0.01 x Diphenylamine mg/l - <0.01 x x x x x x x x <0.01 x Ethyl methanesulfonate mg/l - <0.01 x x x x x x x x <0.01 x Fluoranthene mg/l - <0.01 x x x x x x x x <0.01 x Fluorene mg/l - <0.01 x x x x x x x x <0.01 x Hexachlorobenzene mg/l - <0.001 x x x x x x x x <0.001 x Hexachlorocyclopentadiene mg/l - <0.01 x x x x x x x x <0.01 x Hexachloroethane mg/l - <0.01 x x x x x x x x <0.01 x Hexachloropropene mg/l - <0.01 x x x x x x x x <0.01 x HMX mg/l < < x x x x x x < x Indeno (1,2,3-cd) pyrene mg/l - < x x x x x x x x < x Isophorone mg/l - <0.01 x x x x x x x x <0.01 x Isosafrole mg/l - <0.01 x x x x x x x x <0.01 x m-dinitrobenzene (1,3-DNB) mg/l - < < < x x x x x x < x Methapyrilene mg/l - <0.01 x x x x x x x x <0.01 x Methyl methanesulfonate mg/l - <0.01 x x x x x x x x <0.01 x Naphthalene mg/l 0.03 <0.01 <0.002 <0.002 <0.002 <0.002 x x x x <0.01 x Nitrobenzene mg/l - <0.01 < < x x x x x x <0.01 x n-nitrosodiethylamine mg/l - <0.01 x x x x x x x x <0.01 x n-nitrosodimethylamine mg/l - <0.01 x x x x x x x x <0.01 x n-nitrosodi-n-butylamine mg/l - <0.01 x x x x x x x x <0.01 x n-nitrosodinpropylamine mg/l - <0.010 x x x x x x x x <0.01 x n-nitrosodiphenylamine mg/l - <0.002 x x x x x x x x <0.002 x n-nitrosomethylethylamine mg/l - <0.002 x x x x x x x x <0.002 x n-nitrosopiperidine mg/l - <0.01 x x x x x x x x <0.01 x n-nitrosopyrrolidine mg/l - <0.01 x x x x x x x x <0.01 x o-toluidine mg/l - <0.002 x x x x x x x x <0.002 x p-(dimethylamino) azobenzene mg/l - <0.01 x x x x x x x x <0.01 x Pentachlorobenzene mg/l - <0.01 x x x x x x x x <0.01 x Pentachloronitrobenzene mg/l - <0.01 x x x x x x x x <0.01 x Phenacetin mg/l - <0.01 x x x x x x x x <0.01 x Phenanthrene mg/l - <0.01 x x x x x x x x <0.01 x p-phenylenediamine mg/l - <0.01 x x x x x x x x <0.01 x Pronamide mg/l - <0.01 x x x x x x x x <0.01 x Pyrene mg/l - <0.01 x x x x x x x x <0.01 x Pyridine mg/l - <0.01 x x x x x x x x <0.01 x RDX mg/l < < x x x x x x < x Safrole mg/l - <0.01 x x x x x x x x <0.01 x WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

104 APPEIX B Las Cruces Foothills Landfill MW-9 Page 4 of 4 Las Cruces Foothills Landfill monitoring well MW-9 baseline standard constituent CAS Number unit GWPS RESULTS FOR MW-9 average deviation date 12/29/10 5/18/11 8/23/11 11/28/11 12/29/11 12/20/12 6/26/13 12/28/16 6/28/17 12/29/10 to 12/29/10 to 12/29/11 12/29/11 sym-trinitrobenzene 1 (1,3,5-TNB) mg/l - < < < x x x x x x < x Semi Volatile Organic Compounds - Phenolics 2,3,4,6-Tetrachlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2,4,5-Trichlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2,4,6-Trichlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2,4-Dichlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2,4-Dimethylphenol mg/l - <0.01 x x x x x x x x <0.01 x 2,4-Dinitrophenol mg/l - <0.01 x x x x x x x x <0.01 x 2,6-Dichlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2-Chlorophenol mg/l - <0.01 x x x x x x x x <0.01 x 2-Methylphenol (o-cresol) mg/l - <0.01 x x x x x x x x <0.01 x 2-Nitrophenol (o-nitrophenol) mg/l - <0.01 x x x x x x x x <0.01 x 3-Methylphenol/4-Methylphenol (m&p-cresol) / mg/l - <0.01 x x x x x x x x <0.01 x 4,6-Dinitro-2-methylphenol (4,6-Dinitro-o-cresol) mg/l - <0.01 x x x x x x x x <0.01 x p-chloro-m-cresol (4-Chloro-3-methylphenol) mg/l - <0.005 x x x x x x x x <0.005 x 4-Nitrophenol (p-nitrophenol) mg/l - <0.01 x x x x x x x x <0.01 x Pentachlorophenol mg/l - <0.01 x x x x x x x x <0.01 x Phenol 1 (a) mg/l <0.01 x x x x x x x x <0.01 x Radium 226 and 228 NA pci/l x x x x Ra-226, total NA pci/l x x x x Ra-228 1, total NA pci/l x x x x Chlorinated Pesticides 4,4'-DDD (p,p'-ddd) mg/l - <0.001 x x x x x x x x <0.01 x 4,4'-DDE (p,p'-dde) mg/l - <0.001 x x x x x x x x < x 4,4'-DDT (p,p'-ddt) mg/l - <0.001 x x x x x x x x < x aldrin mg/l - <0.01 x x x x x x x x < x alpha-bhc mg/l - < x x x x x x x x < x alpha-chlordane mg/l - x x x x x x x x x x x beta-bhc mg/l - < x x x x x x x x < x Chlordane mg/l <0.005 x x x x x x x x <0.005 x delta-bhc mg/l - < x x x x x x x x < x Dieldrin mg/l - <0.001 x x x x x x x x <0.001 x Endosulfan I (alpha-endosulfan) mg/l - <0.001 x x x x x x x x <0.001 x Endosulfan II (beta-endosulfan) mg/l - <0.001 x x x x x x x x <0.001 x Endosulfan sulfate mg/l - <0.001 x x x x x x x x <0.001 x Endrin aldehyde mg/l - <0.001 x x x x x x x x <0.001 x Endrin ketone mg/l - x x x x x x x x x x x Endrin mg/l - <0.001 x x x x x x x x <0.001 x gamma-bhc mg/l - < x x x x x x x x < x gamma-chlordane mg/l - x x x x x x x x x x x Heptachlor epoxide mg/l - <0.001 x x x x x x x x <0.001 x Heptachlor mg/l - <0.001 x x x x x x x x <0.001 x Isodrin mg/l - <0.01 x x x x x x x x <0.01 x Kepone mg/l - <0.01 x x x x x x x x <0.01 x Methoxychlor mg/l - <0.01 x x x x x x x x <0.01 x Toxaphene mg/l - <0.001 x x x x x x x x <0.001 x Polychlorinated Biphenyls (PCBs) 1 Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Arochlor mg/l - < < < < < x x x x < x Other Pesticides and Herbicides 1 2,3,7,8-TCDD ng/l 0.03 < x x x x x x x x < x 2,4,5-T mg/l - < x x x x x x x x < x 2,4-Dichlorophenoxyacetic acid (2,4-D) mg/l - < x x x x x x x x < x Dimethoate mg/l - <0.01 x x x x x x x x <0.01 x Dinoseb mg/l - < x x x x x x x x < x Disulfoton mg/l - <0.01 x x x x x x x x <0.01 x Famphur mg/l - <0.005 x x x x x x x x <0.005 x Methyl parathion mg/l - <0.01 x x x x x x x x <0.01 x o,o,o-triethyl phosphorothioate mg/l - <0.01 x x x x x x x x <0.01 x Parathion (Ethyl) mg/l - <0.01 x x x x x x x x <0.01 x Phorate mg/l - <0.01 x x x x x x x x <0.01 x Silvex 1 (2,4,5-TP) mg/l - < x x x x x x x x < x o,o-diethyl o-2pyrazinyl phosphorothioate (Thionazin) mg/l - <0.01 x x x x x x x x <0.01 x * baseline averages and standard deviations are based on 1999 and 2000 data only as per requirements in EPA, Subpart 803., Ground Water Sampling and Analysis, hazardous x parameter not analyzed (#) Scanned for and not detected, breaks down almost immediately in water. WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

105 Mr. James Dyer September 27, 2017 Appendix C. Copy of laboratory reports for the June 27 and 28, 2017 sampling event WATER-RESOURCE A ENVIRONMENTAL CONSULTANTS

106 Hall Environmental Analysis Laboratory 4901 Hawkins NE Albuquerque, NM TEL: FAX: Website: July 28, 2017 Luis Guerra City of Las Cruces PO Box Las Cruces, NM TEL: (575) FAX (575) RE: CLC Foothills Landfill Closure Monitoring Wells OrderNo.: 1706E83 Dear Luis Guerra: Hall Environmental Analysis Laboratory received 5 sample(s) on 6/28/2017 for the analyses presented in the following report. These were analyzed according to EPA procedures or equivalent. To access our accredited tests please go to or the state specific web sites. In order to properly interpret your results, it is imperative that you review this report in its entirety. See the sample checklist and/or the Chain of Custody for information regarding the sample receipt temperature and preservation. Data qualifiers or a narrative will be provided if the sample analysis or analytical quality control parameters require a flag. When necessary, data qualifiers are provided on both the sample analysis report and the QC summary report, both sections should be reviewed. All samples are reported, as received, unless otherwise indicated. Lab measurement of analytes considered field parameters that require analysis within 15 minutes of sampling such as ph and residual chlorine are qualified as being analyzed outside of the recommended holding time. Please don't hesitate to contact HEAL for any additional information or clarifications. ADHS Cert #AZ NMED-DWB Cert #NM NMED-Micro Cert #NM0190 Sincerely, Andy Freeman Laboratory Manager 4901 Hawkins NE Albuquerque, NM 87109

107 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-6 Collection Date: 6/27/2017 8:51:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 504.1: EDB/DBCP 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane EPA METHOD 9060 TOC Total Organic Carbon EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) Analyst: JME µg/l 1 7/1/2017 5:05:52 PM µg/l 1 7/1/2017 5:05:52 PM Analyst: MAB mg/l 1 7/1/2017 3:10:06 PM R43956 Analyst: MRA mg/l 1 6/28/2017 2:53:28 PM R mg/l 1 6/28/2017 2:53:28 PM R mg/l 1 6/28/2017 2:53:28 PM R43864 Analyst: JRR µmhos/cm 1 7/3/2017 8:59:25 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 8:59:25 PM R mg/l CaCO3 1 7/3/2017 8:59:25 PM R mg/l CaCO3 1 7/3/2017 8:59:25 PM R44003 SM2540C MOD: TOTAL DISSOLVED SOLIDS Analyst: KS Total Dissolved Solids mg/l 1 6/29/2017 8:14:00 PM SM 4500 NH3: AMMONIA Analyst: CJS Nitrogen, Ammonia 1.0 mg/l 1 7/13/2017 2:48:00 PM R44217 SM4500-H+B: PH Analyst: JRR ph 8.01 H ph units 1 7/3/2017 8:59:25 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Analyst: ELS mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 1 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

108 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-6 Collection Date: 6/27/2017 8:51:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 200.7: TOTAL METALS Vanadium Zinc Analyst: ELS mg/l 1 7/11/ :18:18 PM mg/l 1 7/11/ :18:18 PM ICPMS METALS:TOTAL Analyst: JLF Antimony mg/l 1 7/14/ :19:46 PM Arsenic mg/l 1 7/14/ :19:46 PM Lead mg/l 1 7/14/ :19:46 PM Selenium mg/l 1 7/14/ :19:46 PM Thallium mg/l 1 7/14/ :19:46 PM EPA METHOD 8260B: VOLATILES, TABLE I Benzene Toluene Ethylbenzene 1,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane 2-Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene Dibromochloromethane Dibromomethane 1,2-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloropropane 2-Hexanone 4-Methyl-2-pentanone Methylene Chloride Styrene Analyst: RAA 1.0 µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF43852 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 2 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

109 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-6 Collection Date: 6/27/2017 8:51:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Analyst: RAA 1.0 µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF µg/l 1 6/28/2017 5:47:00 PM LF %Rec 1 6/28/2017 5:47:00 PM LF %Rec 1 6/28/2017 5:47:00 PM LF %Rec 1 6/28/2017 5:47:00 PM LF %Rec 1 6/28/2017 5:47:00 PM LF43852 TOTAL PHENOLICS BY SW Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 3 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

110 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-7 Collection Date: 6/27/2017 9:48:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 504.1: EDB/DBCP 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane Analyst: JME µg/l 1 7/1/2017 5:21:02 PM µg/l 1 7/1/2017 5:21:02 PM EPA METHOD 9060 TOC Analyst: MAB Total Organic Carbon 1.0 mg/l 1 7/1/2017 2:53:15 PM R43956 EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) Analyst: MRA mg/l 20 6/28/2017 3:55:30 PM R mg/l 1 6/28/2017 3:43:05 PM R mg/l 20 6/28/2017 3:55:30 PM R43864 Analyst: JRR µmhos/cm 1 7/3/2017 9:08:12 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 9:08:12 PM R mg/l CaCO3 1 7/3/2017 9:08:12 PM R mg/l CaCO3 1 7/3/2017 9:08:12 PM R44003 SM2540C MOD: TOTAL DISSOLVED SOLIDS Analyst: KS Total Dissolved Solids mg/l 1 6/29/2017 8:14:00 PM SM 4500 NH3: AMMONIA Analyst: CJS Nitrogen, Ammonia 1.0 mg/l 1 7/13/2017 2:48:00 PM R44217 SM4500-H+B: PH Analyst: JRR ph 7.96 H ph units 1 7/3/2017 9:08:12 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Analyst: ELS mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 4 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

111 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-7 Collection Date: 6/27/2017 9:48:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 200.7: TOTAL METALS Vanadium Zinc Analyst: ELS mg/l 1 7/11/ :22:11 PM mg/l 1 7/11/ :22:11 PM ICPMS METALS:TOTAL Analyst: JLF Antimony mg/l 1 7/14/ :24:54 PM Arsenic mg/l 1 7/14/ :24:54 PM Lead mg/l 1 7/14/ :24:54 PM Selenium mg/l 1 7/14/ :24:54 PM Thallium mg/l 1 7/14/ :24:54 PM EPA METHOD 8260B: VOLATILES, TABLE I Benzene Toluene Ethylbenzene 1,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane 2-Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene Dibromochloromethane Dibromomethane 1,2-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloropropane 2-Hexanone 4-Methyl-2-pentanone Methylene Chloride Styrene Analyst: RAA 1.0 µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF43852 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 5 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

112 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-7 Collection Date: 6/27/2017 9:48:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Analyst: RAA 1.0 µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF µg/l 1 6/28/2017 7:00:00 PM LF %Rec 1 6/28/2017 7:00:00 PM LF %Rec 1 6/28/2017 7:00:00 PM LF %Rec 1 6/28/2017 7:00:00 PM LF %Rec 1 6/28/2017 7:00:00 PM LF43852 TOTAL PHENOLICS BY SW Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 6 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

113 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-2 Collection Date: 6/27/ :30:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 504.1: EDB/DBCP 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane Analyst: JME µg/l 1 7/1/2017 5:36:09 PM µg/l 1 7/1/2017 5:36:09 PM EPA METHOD 9060 TOC Analyst: MAB Total Organic Carbon 1.0 mg/l 1 7/1/2017 3:26:57 PM R43956 EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) Analyst: MRA mg/l 1 6/28/2017 4:32:43 PM R mg/l 1 6/28/2017 4:32:43 PM R mg/l 1 6/28/2017 4:32:43 PM R43864 Analyst: JRR µmhos/cm 1 7/3/2017 9:17:09 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 9:17:09 PM R mg/l CaCO3 1 7/3/2017 9:17:09 PM R mg/l CaCO3 1 7/3/2017 9:17:09 PM R44003 SM2540C MOD: TOTAL DISSOLVED SOLIDS Analyst: KS Total Dissolved Solids mg/l 1 6/29/2017 8:14:00 PM SM 4500 NH3: AMMONIA Analyst: CJS Nitrogen, Ammonia 1.0 mg/l 1 7/13/2017 2:48:00 PM R44217 SM4500-H+B: PH Analyst: JRR ph 7.96 H ph units 1 7/3/2017 9:17:09 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Analyst: ELS mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 7 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

114 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-2 Collection Date: 6/27/ :30:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 200.7: TOTAL METALS Vanadium Zinc Analyst: ELS mg/l 1 7/11/ :26:05 PM mg/l 1 7/11/ :26:05 PM ICPMS METALS:TOTAL Analyst: JLF Antimony mg/l 1 7/14/ :30:03 PM Arsenic mg/l 1 7/14/ :30:03 PM Lead mg/l 1 7/14/ :30:03 PM Selenium mg/l 1 7/14/ :30:03 PM Thallium mg/l 1 7/14/ :30:03 PM EPA METHOD 8260B: VOLATILES, TABLE I Analyst: RAA Benzene Toluene Ethylbenzene 1,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane 1.0 µg/l µg/l µg/l µg/l 1 10 µg/l µg/l µg/l µg/l 1 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene 10 µg/l 1 10 µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l 1 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 Dibromochloromethane Dibromomethane 1,2-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloropropane 2-Hexanone 1.0 µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l 1 10 µg/l 1 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF Methyl-2-pentanone Methylene Chloride Styrene 10 µg/l µg/l µg/l 1 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM 6/28/2017 7:24:00 PM LF43852 LF43852 LF43852 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 8 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

115 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-2 Collection Date: 6/27/ :30:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Analyst: RAA 1.0 µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF µg/l 1 6/28/2017 7:24:00 PM LF %Rec 1 6/28/2017 7:24:00 PM LF %Rec 1 6/28/2017 7:24:00 PM LF %Rec 1 6/28/2017 7:24:00 PM LF %Rec 1 6/28/2017 7:24:00 PM LF43852 TOTAL PHENOLICS BY SW Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 9 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

116 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-1 Collection Date: 6/27/ :28:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 504.1: EDB/DBCP 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane EPA METHOD 9060 TOC Total Organic Carbon EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) SM2540C MOD: TOTAL DISSOLVED SOLIDS Total Dissolved Solids SM 4500 NH3: AMMONIA Nitrogen, Ammonia SM4500-H+B: PH Analyst: JME µg/l 1 7/1/2017 6:06:43 PM µg/l 1 7/1/2017 6:06:43 PM mg/l 1 7/1/2017 4:27:43 PM Analyst: MAB R43956 Analyst: MRA mg/l 20 6/28/2017 5:09:56 PM R mg/l 1 6/28/2017 4:57:32 PM R mg/l 1 6/28/2017 4:57:32 PM R43864 Analyst: JRR µmhos/cm 1 7/3/2017 9:30:42 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 9:30:42 PM R mg/l CaCO3 1 7/3/2017 9:30:42 PM R mg/l CaCO3 1 7/3/2017 9:30:42 PM R44003 Analyst: KS mg/l 1 6/29/2017 8:14:00 PM mg/l 1 7/13/2017 2:48:00 PM Analyst: CJS R44217 Analyst: JRR ph 8.16 H ph units 1 7/3/2017 9:30:42 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Analyst: ELS mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM mg/l 1 7/11/ :36:20 PM Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 10 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

117 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-1 Collection Date: 6/27/ :28:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 200.7: TOTAL METALS Analyst: ELS Vanadium mg/l 1 7/11/ :36:20 PM Zinc mg/l 1 7/11/ :36:20 PM ICPMS METALS:TOTAL Analyst: JLF Antimony mg/l 1 7/14/ :50:40 PM Arsenic mg/l 1 7/14/ :50:40 PM Lead mg/l 1 7/14/ :50:40 PM Selenium mg/l 1 7/14/ :50:40 PM Thallium mg/l 1 7/14/ :50:40 PM EPA METHOD 8260B: VOLATILES, TABLE I Analyst: RAA Benzene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Toluene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Ethylbenzene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF ,2-Dichloroethane (EDC) 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Acetone 10 µg/l 1 6/28/2017 7:49:00 PM LF43852 Bromodichloromethane 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Bromoform 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Bromomethane 2.0 µg/l 1 6/28/2017 7:49:00 PM LF Butanone 10 µg/l 1 6/28/2017 7:49:00 PM LF43852 Carbon disulfide 10 µg/l 1 6/28/2017 7:49:00 PM LF43852 Carbon Tetrachloride 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Chlorobenzene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Chloroethane 2.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Chloroform 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Chloromethane 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 cis-1,2-dce µg/l 1 6/28/2017 7:49:00 PM LF43852 cis-1,3-dichloropropene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Dibromochloromethane 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Dibromomethane 1.0 µg/l 1 6/28/2017 7:49:00 PM LF ,2-Dichlorobenzene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF ,4-Dichlorobenzene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Dichlorodifluoromethane µg/l 1 6/28/2017 7:49:00 PM LF ,1-Dichloroethane 1.0 µg/l 1 6/28/2017 7:49:00 PM LF ,1-Dichloroethene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF ,2-Dichloropropane 0.50 µg/l 1 6/28/2017 7:49:00 PM LF Hexanone 10 µg/l 1 6/28/2017 7:49:00 PM LF Methyl-2-pentanone 10 µg/l 1 6/28/2017 7:49:00 PM LF43852 Methylene Chloride 2.5 µg/l 1 6/28/2017 7:49:00 PM LF43852 Styrene 1.0 µg/l 1 6/28/2017 7:49:00 PM LF43852 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 11 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

118 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-1 Collection Date: 6/27/ :28:00 AM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 TOTAL PHENOLICS BY SW µg/l µg/l 1 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM Analyst: RAA LF43852 LF µg/l 1 6/28/2017 7:49:00 PM LF µg/l µg/l µg/l µg/l 1 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM LF43852 LF43852 LF43852 LF µg/l 1 6/28/2017 7:49:00 PM LF µg/l 1 6/28/2017 7:49:00 PM LF µg/l µg/l µg/l 1 10 µg/l µg/l 1 10 µg/l 1 10 µg/l 1 10 µg/l 1 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM 6/28/2017 7:49:00 PM LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF %Rec 1 6/28/2017 7:49:00 PM LF %Rec 1 6/28/2017 7:49:00 PM LF %Rec 1 6/28/2017 7:49:00 PM LF %Rec 1 6/28/2017 7:49:00 PM LF43852 Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 12 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

119 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-5 Collection Date: 6/27/2017 1:05:00 PM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 504.1: EDB/DBCP 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane EPA METHOD 9060 TOC Total Organic Carbon EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) SM2540C MOD: TOTAL DISSOLVED SOLIDS Total Dissolved Solids SM 4500 NH3: AMMONIA Nitrogen, Ammonia SM4500-H+B: PH Analyst: JME µg/l 1 7/1/2017 6:21:56 PM µg/l 1 7/1/2017 6:21:56 PM mg/l 1 7/1/2017 2:00:58 PM Analyst: MAB R43956 Analyst: MRA mg/l 20 6/28/2017 5:34:45 PM R mg/l 1 6/28/2017 5:22:20 PM R mg/l 20 6/28/2017 5:34:45 PM R43864 Analyst: JRR µmhos/cm 1 7/3/2017 9:37:57 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 9:37:57 PM R mg/l CaCO3 1 7/3/2017 9:37:57 PM R mg/l CaCO3 1 7/3/2017 9:37:57 PM R44003 Analyst: KS mg/l 1 6/29/2017 8:14:00 PM mg/l 1 7/13/2017 2:48:00 PM Analyst: CJS R44217 Analyst: JRR ph 8.06 H ph units 1 7/3/2017 9:37:57 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Analyst: ELS mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM mg/l 1 7/11/ :40:13 PM Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 13 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

120 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-5 Collection Date: 6/27/2017 1:05:00 PM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 200.7: TOTAL METALS Analyst: ELS Vanadium mg/l 1 7/11/ :40:13 PM Zinc mg/l 1 7/11/ :40:13 PM ICPMS METALS:TOTAL Analyst: JLF Antimony mg/l 1 7/14/2017 1:00:59 PM Arsenic mg/l 1 7/14/2017 1:00:59 PM Lead mg/l 1 7/14/2017 1:00:59 PM Selenium mg/l 1 7/14/2017 1:00:59 PM Thallium mg/l 1 7/14/2017 1:00:59 PM EPA METHOD 8260B: VOLATILES, TABLE I Analyst: RAA Benzene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Toluene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Ethylbenzene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF ,2-Dichloroethane (EDC) 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Acetone 10 µg/l 1 6/28/2017 8:13:00 PM LF43852 Bromodichloromethane 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Bromoform 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Bromomethane 2.0 µg/l 1 6/28/2017 8:13:00 PM LF Butanone 10 µg/l 1 6/28/2017 8:13:00 PM LF43852 Carbon disulfide 10 µg/l 1 6/28/2017 8:13:00 PM LF43852 Carbon Tetrachloride 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Chlorobenzene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Chloroethane 2.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Chloroform 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Chloromethane 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 cis-1,2-dce 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 cis-1,3-dichloropropene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Dibromochloromethane 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Dibromomethane 1.0 µg/l 1 6/28/2017 8:13:00 PM LF ,2-Dichlorobenzene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF ,4-Dichlorobenzene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Dichlorodifluoromethane µg/l 1 6/28/2017 8:13:00 PM LF ,1-Dichloroethane 1.0 µg/l 1 6/28/2017 8:13:00 PM LF ,1-Dichloroethene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF ,2-Dichloropropane 0.50 µg/l 1 6/28/2017 8:13:00 PM LF Hexanone 10 µg/l 1 6/28/2017 8:13:00 PM LF Methyl-2-pentanone 10 µg/l 1 6/28/2017 8:13:00 PM LF43852 Methylene Chloride 2.5 µg/l 1 6/28/2017 8:13:00 PM LF43852 Styrene 1.0 µg/l 1 6/28/2017 8:13:00 PM LF43852 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 14 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

121 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706E Matrix: AQUEOUS Analytical Report Lab Order 1706E83 Date Reported: 7/28/2017 Client Sample ID: Foothills MW-5 Collection Date: 6/27/2017 1:05:00 PM Received Date: 6/28/2017 9:00:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 TOTAL PHENOLICS BY SW µg/l µg/l 1 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM Analyst: RAA LF43852 LF µg/l 1 6/28/2017 8:13:00 PM LF µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l 1 10 µg/l µg/l 1 10 µg/l 1 10 µg/l 1 10 µg/l 1 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM 6/28/2017 8:13:00 PM LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF43852 LF %Rec 1 6/28/2017 8:13:00 PM LF %Rec 1 6/28/2017 8:13:00 PM LF %Rec 1 6/28/2017 8:13:00 PM LF %Rec 1 6/28/2017 8:13:00 PM LF43852 Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 15 of 30 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

122 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/9/2017 SampType: MBLK Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium 1.0 Chromium Cobalt Copper Iron Magnesium 1.0 Manganese Nickel Potassium 1.0 Silver Sodium 1.0 Vanadium Zinc Sample ID LLLCS Client ID: BatchQC Batch ID: RunNo: Prep Date: 7/9/2017 SampType: LCSLL Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Vanadium Zinc Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 16 of 30

123 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/9/2017 SampType: LCS Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Vanadium Zinc Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 17 of 30

124 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/9/2017 SampType: MBLK Analysis Date: 7/10/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID MSLCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/9/2017 SampType: LCS Analysis Date: 7/10/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID MSLLLCS Client ID: BatchQC Batch ID: RunNo: Prep Date: 7/9/2017 SampType: LCSLL Analysis Date: 7/10/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID 1706E83-003ELLMS Client ID: Foothills MW-2 Batch ID: RunNo: Prep Date: 7/9/2017 SampType: MSLL Analysis Date: 7/14/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 18 of 30

125 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R43864 RunNo: Prep Date: SampType: mblk Analysis Date: 6/28/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride 0.50 Nitrogen, Nitrate (As N) 0.10 Sulfate 0.50 Sample ID LCS Client ID: LCSW Batch ID: R43864 RunNo: Prep Date: SampType: lcs Analysis Date: 6/28/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride Nitrogen, Nitrate (As N) Sulfate Sample ID 1706E83-001DMS Client ID: Foothills MW-6 Batch ID: R43864 RunNo: Prep Date: SampType: ms Analysis Date: 6/28/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride Nitrogen, Nitrate (As N) Sample ID 1706E83-001DMSD Client ID: Foothills MW-6 Batch ID: R43864 RunNo: Prep Date: SampType: msd Analysis Date: 6/28/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride Nitrogen, Nitrate (As N) Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 19 of 30

126 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/1/2017 SampType: MBLK Analysis Date: 7/1/2017 TestCode: EPA Method 504.1: EDB/DBCP SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/1/2017 SampType: LCS Analysis Date: 7/1/2017 TestCode: EPA Method 504.1: EDB/DBCP SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 20 of 30

127 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 100ng lcs Client ID: LCSW Batch ID: LF43852 RunNo: Prep Date: SampType: LCS Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene Toluene Chlorobenzene ,1-Dichloroethene Trichloroethene (TCE) Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d Sample ID rb Client ID: PBW Batch ID: LF43852 RunNo: Prep Date: SampType: MBLK Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene 1.0 Toluene 1.0 Ethylbenzene 1.0 1,2-Dichloroethane (EDC) 1.0 Acetone 10 Bromodichloromethane 1.0 Bromoform 1.0 Bromomethane Butanone 10 Carbon disulfide 10 Carbon Tetrachloride 1.0 Chlorobenzene 1.0 Chloroethane 2.0 Chloroform 1.0 Chloromethane 1.0 cis-1,2-dce 1.0 cis-1,3-dichloropropene 1.0 Dibromochloromethane 1.0 Dibromomethane 1.0 1,2-Dichlorobenzene 1.0 1,4-Dichlorobenzene 1.0 1,1-Dichloroethane 1.0 1,1-Dichloroethene 1.0 1,2-Dichloropropane 0.50 Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 21 of 30

128 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID rb Client ID: PBW Batch ID: LF43852 RunNo: Prep Date: SampType: MBLK Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 2-Hexanone 10 4-Methyl-2-pentanone 10 Methylene Chloride 2.5 Styrene 1.0 1,1,1,2-Tetrachloroethane 1.0 1,1,2,2-Tetrachloroethane 1.0 Tetrachloroethene (PCE) 0.50 trans-1,2-dce 1.0 trans-1,3-dichloropropene 1.0 1,1,1-Trichloroethane 1.0 1,1,2-Trichloroethane 1.0 Trichloroethene (TCE) 1.0 Trichlorofluoromethane 1.0 1,2,3-Trichloropropane 1.0 Vinyl chloride 0.40 Xylenes, Total 2.0 Acrylonitrile 10 Bromochloromethane 2.0 Iodomethane 10 trans-1,4-dichloro-2-butene 10 Vinyl acetate 10 Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d Sample ID 1706e83-001ams Client ID: Foothills MW-6 Batch ID: LF43852 RunNo: Prep Date: SampType: MS Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene Toluene Chlorobenzene ,1-Dichloroethene Trichloroethene (TCE) Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 22 of 30

129 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 1706e83-001ams Client ID: Foothills MW-6 Batch ID: LF43852 RunNo: Prep Date: SampType: MS Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Surr: Toluene-d Sample ID 1706e83-001amsd Client ID: Foothills MW-6 Batch ID: LF43852 RunNo: Prep Date: SampType: MSD Analysis Date: 6/28/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene Toluene Chlorobenzene ,1-Dichloroethene Trichloroethene (TCE) Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 23 of 30

130 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R43956 RunNo: Prep Date: SampType: MBLK Analysis Date: 7/1/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon 1.0 Sample ID LCS ST / Client ID: LCSW Batch ID: R43956 RunNo: Prep Date: SampType: LCS Analysis Date: 7/1/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon Sample ID 1706E83-005FMS Client ID: Foothills MW-5 Batch ID: R43956 RunNo: Prep Date: SampType: MS Analysis Date: 7/1/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon Sample ID 1706E83-005FMSD Client ID: Foothills MW-5 Batch ID: R43956 RunNo: Prep Date: SampType: MSD Analysis Date: 7/1/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 24 of 30

131 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: MBLK TestCode: Total Phenolics by SW Analysis Date: 6/30/2017 SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Phenolics 2.5 Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: LCS TestCode: Total Phenolics by SW Analysis Date: 6/30/2017 SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Phenolics Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 25 of 30

132 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 1706e83-003d dup Client ID: Foothills MW-2 Batch ID: R44003 RunNo: Prep Date: SampType: dup Analysis Date: 7/3/2017 TestCode: SM2510B: Specific Conductance SeqNo: Units: µmhos/cm Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Conductivity Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 26 of 30

133 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R44217 RunNo: Prep Date: SampType: MBLK Analysis Date: 7/13/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia 1.0 Sample ID LCS Client ID: LCSW Batch ID: R44217 RunNo: Prep Date: SampType: LCS Analysis Date: 7/13/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia Sample ID 1706E83-001DMS Client ID: Foothills MW-6 Batch ID: R44217 RunNo: Prep Date: SampType: MS Analysis Date: 7/13/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia Sample ID 1706E83-001DMSD Client ID: Foothills MW-6 Batch ID: R44217 RunNo: Prep Date: SampType: MSD Analysis Date: 7/13/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 27 of 30

134 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 1706e83-003d dup SampType: dup TestCode: SM4500-H+B: ph Client ID: Foothills MW-2 Batch ID: R44003 RunNo: Prep Date: Analysis Date: 7/3/2017 SeqNo: Units: ph units Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual ph 8.01 H Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 28 of 30

135 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID mb-1 Client ID: PBW Batch ID: R44003 RunNo: Prep Date: SampType: mblk Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID lcs-1 Client ID: LCSW Batch ID: R44003 RunNo: Prep Date: SampType: lcs Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID mb-2 Client ID: PBW Batch ID: R44003 RunNo: Prep Date: SampType: mblk Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID lcs-2 Client ID: LCSW Batch ID: R44003 RunNo: Prep Date: SampType: lcs Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 29 of 30

136 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706E83 28-Jul-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 6/28/2017 SampType: MBLK Analysis Date: 6/29/2017 TestCode: SM2540C MOD: Total Dissolved Solids SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Dissolved Solids 20.0 Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 6/28/2017 SampType: LCS Analysis Date: 6/29/2017 TestCode: SM2540C MOD: Total Dissolved Solids SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Dissolved Solids Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 30 of 30

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143 Hall Environmental Analysis Laboratory 4901 Hawkins NE Albuquerque, NM TEL: FAX: Website: August 10, 2017 Luis Guerra City of Las Cruces PO Box Las Cruces, NM TEL: (575) FAX (575) RE: CLC Foothills Landfill Closure Monitoring Wells OrderNo.: 1706F45 Dear Luis Guerra: Hall Environmental Analysis Laboratory received 2 sample(s) on 6/29/2017 for the analyses presented in the following report. This report is a revised report and it replaces the original report issued July 24, These were analyzed according to EPA procedures or equivalent. To access our accredited tests please go to or the state specific web sites. See the sample checklist and/or the Chain of Custody for information regarding the sample receipt temperature and preservation. Data qualifiers or a narrative will be provided if the sample analysis or analytical quality control parameters require a flag. All samples are reported as received unless otherwise indicated. Please don't hesitate to contact HEAL for any additional information or clarifications. Sincerely, Andy Freeman Laboratory Manager 4901 Hawkins NE Albuquerque, NM 87109

144 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-9 Collection Date: 6/28/ :20:00 AM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 9060 TOC Total Organic Carbon EPA METHOD 300.0: ANIONS Chloride Sulfate Nitrate+Nitrite as N SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) Analyst: MAB mg/l 1 6/30/2017 2:05:37 PM R43945 Analyst: MRA mg/l 20 7/19/ :07:04 AM R mg/l 20 6/29/2017 7:39:25 PM R mg/l 5 7/19/ :31:53 AM R44336 Analyst: JRR µmhos/cm 1 7/3/2017 2:07:43 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 2:07:43 PM R mg/l CaCO3 1 7/3/2017 2:07:43 PM R mg/l CaCO3 1 7/3/2017 2:07:43 PM R44003 SM2540C MOD: TOTAL DISSOLVED SOLIDS Analyst: KS Total Dissolved Solids * mg/l 1 7/2/2017 2:34:00 PM SM 4500 NH3: AMMONIA Analyst: CJS Nitrogen, Ammonia 1.0 mg/l 1 7/5/2017 3:00:00 PM R44016 SM4500-H+B: PH Analyst: JRR ph 7.33 H ph units 1 7/3/2017 2:07:43 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Analyst: ELS mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM Iron * mg/l 1 7/11/ :34:34 AM Magnesium Manganese mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM Nickel * mg/l 1 7/11/ :34:34 AM Potassium Silver Sodium Vanadium Zinc mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM mg/l 10 7/11/ :36:29 AM mg/l 1 7/11/ :34:34 AM mg/l 1 7/11/ :34:34 AM ICPMS METALS:TOTAL Analyst: ELS Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 1 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

145 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-9 Collection Date: 6/28/ :20:00 AM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch ICPMS METALS:TOTAL Analyst: ELS Antimony mg/l 1 7/18/ :00:15 AM Arsenic mg/l 1 7/18/ :00:15 AM Lead mg/l 1 7/18/ :00:15 AM Selenium mg/l 1 7/18/ :00:15 AM Thallium mg/l 1 7/18/ :00:15 AM EPA METHOD 8011/504.1: EDB 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane Analyst: JME µg/l 1 7/1/2017 2:33:40 PM µg/l 1 7/1/2017 2:33:40 PM EPA METHOD 8260B: VOLATILES, TABLE I Analyst: RAA Benzene Toluene Ethylbenzene 1,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane 1.0 µg/l µg/l µg/l µg/l 1 10 µg/l µg/l µg/l µg/l 1 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene 10 µg/l 1 10 µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l 1 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 Dibromochloromethane Dibromomethane 1,2-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloropropane 2-Hexanone 1.0 µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l 1 10 µg/l 1 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF43892 LF Methyl-2-pentanone Methylene Chloride Styrene 10 µg/l µg/l µg/l 1 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM 6/29/2017 6:57:00 PM LF43892 LF43892 LF43892 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 2 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

146 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-9 Collection Date: 6/28/ :20:00 AM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Analyst: RAA 1.0 µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF µg/l 1 6/29/2017 6:57:00 PM LF %Rec 1 6/29/2017 6:57:00 PM LF %Rec 1 6/29/2017 6:57:00 PM LF %Rec 1 6/29/2017 6:57:00 PM LF %Rec 1 6/29/2017 6:57:00 PM LF43892 TOTAL PHENOLICS BY SW Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 3 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

147 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-4 Collection Date: 6/28/ :11:00 PM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 9060 TOC Analyst: MAB Total Organic Carbon 1.0 mg/l 1 6/30/2017 3:10:06 PM R43945 EPA METHOD 300.0: ANIONS Chloride Nitrogen, Nitrate (As N) Sulfate SM2510B: SPECIFIC COUCTANCE Conductivity SM2320B: ALKALINITY Bicarbonate (As CaCO3) Carbonate (As CaCO3) Total Alkalinity (as CaCO3) Analyst: MRA mg/l 1 7/19/ :19:29 AM R mg/l 1 6/29/2017 8:16:39 PM R mg/l 1 6/29/2017 8:16:39 PM R43889 Analyst: JRR µmhos/cm 1 7/3/2017 2:25:49 PM R44003 Analyst: JRR mg/l CaCO3 1 7/3/2017 2:25:49 PM R mg/l CaCO3 1 7/3/2017 2:25:49 PM R mg/l CaCO3 1 7/3/2017 2:25:49 PM R44003 SM2540C MOD: TOTAL DISSOLVED SOLIDS Analyst: KS Total Dissolved Solids mg/l 1 7/2/2017 2:34:00 PM SM 4500 NH3: AMMONIA Analyst: CJS Nitrogen, Ammonia 1.0 mg/l 1 7/5/2017 3:00:00 PM R44016 SM4500-H+B: PH Analyst: JRR ph 7.15 H ph units 1 7/3/2017 2:25:49 PM R44003 EPA METHOD 200.7: TOTAL METALS Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Vanadium Zinc Analyst: ELS mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 10 7/11/ :40:34 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM mg/l 1 7/11/ :38:37 AM ICPMS METALS:TOTAL Analyst: ELS Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 4 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

148 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-4 Collection Date: 6/28/ :11:00 PM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch ICPMS METALS:TOTAL Analyst: ELS Antimony mg/l 1 7/18/ :05:24 AM Arsenic mg/l 1 7/18/ :05:24 AM Lead mg/l 1 7/18/ :05:24 AM Selenium mg/l 1 7/18/ :05:24 AM Thallium mg/l 1 7/18/ :05:24 AM EPA METHOD 8011/504.1: EDB 1,2-Dibromo-3-chloropropane 1,2-Dibromoethane EPA METHOD 8260B: VOLATILES, TABLE I Benzene Toluene Ethylbenzene 1,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane 2-Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene Dibromochloromethane Dibromomethane 1,2-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2-Dichloropropane 2-Hexanone 4-Methyl-2-pentanone Methylene Chloride Styrene Analyst: JME µg/l 1 7/1/2017 3:34:38 PM µg/l 1 7/1/2017 3:34:38 PM Analyst: RAA 1.0 µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF43892 Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 5 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

149 Hall Environmental Analysis Laboratory, Inc. CLIENT: City of Las Cruces Project: CLC Foothills Landfill Closure Monitori Lab ID: 1706F Matrix: AQUEOUS Analytical Report Lab Order 1706F45 Date Reported: 8/10/2017 Client Sample ID: Foothills MW-4 Collection Date: 6/28/ :11:00 PM Received Date: 6/29/2017 9:40:00 AM Analyses Result PQL Qual Units DF Date Analyzed Batch EPA METHOD 8260B: VOLATILES, TABLE I 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane 1,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Vinyl acetate Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Analyst: RAA 1.0 µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF µg/l 1 6/29/2017 7:21:00 PM LF %Rec 1 6/29/2017 7:21:00 PM LF %Rec 1 6/29/2017 7:21:00 PM LF %Rec 1 6/29/2017 7:21:00 PM LF %Rec 1 6/29/2017 7:21:00 PM LF43892 TOTAL PHENOLICS BY SW Analyst: SCC Phenolics 2.5 µg/l 1 6/30/ Refer to the QC Summary report and sample login checklist for flagged QC data and preservation information. Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Page 6 of 20 Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified

150 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/10/2017 SampType: MBLK Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium 1.0 Chromium Cobalt Copper Iron Magnesium 1.0 Manganese Nickel Potassium 1.0 Silver Sodium 1.0 Vanadium Zinc Sample ID LLLCS Client ID: BatchQC Batch ID: RunNo: Prep Date: 7/10/2017 SampType: LCSLL Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Vanadium Zinc Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 7 of 20

151 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/10/2017 SampType: LCS Analysis Date: 7/11/2017 TestCode: EPA Method 200.7: Total Metals SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Magnesium Manganese Nickel Potassium Silver Sodium Vanadium Zinc Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 8 of 20

152 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/10/2017 SampType: MBLK Analysis Date: 7/18/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID MSLCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/10/2017 SampType: LCS Analysis Date: 7/18/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID MSLLLCS Client ID: BatchQC Batch ID: RunNo: Prep Date: 7/10/2017 SampType: LCSLL Analysis Date: 7/18/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Sample ID 1706F45-002FLLMS Client ID: Foothills MW-4 Batch ID: RunNo: Prep Date: 7/10/2017 SampType: MSDLL Analysis Date: 7/18/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 9 of 20

153 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 1706F45-002FLLMS Client ID: Foothills MW-4 Batch ID: RunNo: Prep Date: 7/10/2017 SampType: MSLL Analysis Date: 7/18/2017 TestCode: ICPMS Metals:Total SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Antimony Arsenic Lead Selenium Thallium Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 10 of 20

154 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R43889 RunNo: Prep Date: SampType: mblk Analysis Date: 6/29/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Nitrate (As N) 0.10 Sulfate 0.50 Sample ID LCS Client ID: LCSW Batch ID: R43889 RunNo: Prep Date: SampType: lcs Analysis Date: 6/29/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Nitrate (As N) Sulfate Sample ID 1706F45-001EMS Client ID: Foothills MW-9 Batch ID: R43889 RunNo: Prep Date: SampType: ms Analysis Date: 6/29/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Nitrate (As N) Sample ID 1706F45-001EMSD Client ID: Foothills MW-9 Batch ID: R43889 RunNo: Prep Date: SampType: msd Analysis Date: 6/29/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Nitrate (As N) Sample ID MB Client ID: PBW Batch ID: R44336 RunNo: Prep Date: SampType: mblk Analysis Date: 7/19/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride 0.50 Nitrate+Nitrite as N 0.20 Sample ID LCS Client ID: LCSW Batch ID: R44336 RunNo: Prep Date: SampType: lcs Analysis Date: 7/19/2017 TestCode: EPA Method 300.0: Anions SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Chloride Nitrate+Nitrite as N Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 11 of 20

155 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 7/1/2017 SampType: MBLK Analysis Date: 7/1/2017 TestCode: EPA Method 8011/504.1: EDB SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 7/1/2017 SampType: LCS Analysis Date: 7/1/2017 TestCode: EPA Method 8011/504.1: EDB SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Sample ID 1706F45-001BMS Client ID: Foothills MW-9 Batch ID: RunNo: Prep Date: 7/1/2017 SampType: MS Analysis Date: 7/1/2017 TestCode: EPA Method 8011/504.1: EDB SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Sample ID 1706F45-001BMSD Client ID: Foothills MW-9 Batch ID: RunNo: Prep Date: 7/1/2017 SampType: MSD Analysis Date: 7/1/2017 TestCode: EPA Method 8011/504.1: EDB SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dibromo-3-chloropropane ,2-Dibromoethane Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 12 of 20

156 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID RB Client ID: PBW Batch ID: LF43892 RunNo: Prep Date: SampType: MBLK Analysis Date: 6/29/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene 1.0 Toluene 1.0 Ethylbenzene 1.0 1,2-Dichloroethane (EDC) 1.0 Acetone 10 Bromodichloromethane 1.0 Bromoform 1.0 Bromomethane Butanone 10 Carbon disulfide 10 Carbon Tetrachloride 1.0 Chlorobenzene 1.0 Chloroethane 2.0 Chloroform 1.0 Chloromethane 1.0 cis-1,2-dce 1.0 cis-1,3-dichloropropene 1.0 Dibromochloromethane 1.0 Dibromomethane 1.0 1,2-Dichlorobenzene 1.0 1,4-Dichlorobenzene 1.0 1,1-Dichloroethane 1.0 1,1-Dichloroethene 1.0 1,2-Dichloropropane Hexanone 10 4-Methyl-2-pentanone 10 Methylene Chloride 2.5 Styrene 1.0 1,1,1,2-Tetrachloroethane 1.0 1,1,2,2-Tetrachloroethane 1.0 Tetrachloroethene (PCE) 0.50 trans-1,2-dce 1.0 trans-1,3-dichloropropene 1.0 1,1,1-Trichloroethane 1.0 1,1,2-Trichloroethane 1.0 Trichloroethene (TCE) 1.0 Trichlorofluoromethane 1.0 1,2,3-Trichloropropane 1.0 Vinyl chloride 0.40 Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 13 of 20

157 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID RB Client ID: PBW Batch ID: LF43892 RunNo: Prep Date: SampType: MBLK Analysis Date: 6/29/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Xylenes, Total 2.0 Acrylonitrile 10 Bromochloromethane 2.0 Iodomethane 10 trans-1,4-dichloro-2-butene 10 Vinyl acetate 10 Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d Sample ID 100ng lcs Client ID: LCSW Batch ID: LF43892 RunNo: Prep Date: SampType: LCS Analysis Date: 6/29/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Benzene Toluene Ethylbenzene ,2-Dichloroethane (EDC) Acetone Bromodichloromethane Bromoform Bromomethane Butanone Carbon disulfide Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dce cis-1,3-dichloropropene Dibromochloromethane Dibromomethane ,2-Dichlorobenzene ,4-Dichlorobenzene ,1-Dichloroethane ,1-Dichloroethene Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 14 of 20

158 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID 100ng lcs Client ID: LCSW Batch ID: LF43892 RunNo: Prep Date: SampType: LCS Analysis Date: 6/29/2017 TestCode: EPA Method 8260B: Volatiles, Table I SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual 1,2-Dichloropropane Hexanone Methyl-2-pentanone Methylene Chloride Styrene ,1,1,2-Tetrachloroethane ,1,2,2-Tetrachloroethane Tetrachloroethene (PCE) trans-1,2-dce trans-1,3-dichloropropene ,1,1-Trichloroethane ,1,2-Trichloroethane Trichloroethene (TCE) Trichlorofluoromethane ,2,3-Trichloropropane Vinyl chloride Xylenes, Total Acrylonitrile Bromochloromethane Iodomethane trans-1,4-dichloro-2-butene Surr: 1,2-Dichloroethane-d Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 15 of 20

159 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R43945 RunNo: Prep Date: SampType: MBLK Analysis Date: 6/30/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon 1.0 Sample ID LCS ST / Client ID: LCSW Batch ID: R43945 RunNo: Prep Date: SampType: LCS Analysis Date: 6/30/2017 TestCode: EPA Method 9060 TOC SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Organic Carbon Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 16 of 20

160 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: MBLK TestCode: Total Phenolics by SW Analysis Date: 6/30/2017 SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Phenolics 2.5 Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: LCS TestCode: Total Phenolics by SW Analysis Date: 6/30/2017 SeqNo: Units: µg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Phenolics Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 17 of 20

161 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: R44016 RunNo: Prep Date: SampType: MBLK Analysis Date: 7/5/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia 1.0 Sample ID LCS Client ID: LCSW Batch ID: R44016 RunNo: Prep Date: SampType: LCS Analysis Date: 7/5/2017 TestCode: SM 4500 NH3: Ammonia SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Nitrogen, Ammonia Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 18 of 20

162 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID mb-1 Client ID: PBW Batch ID: R44003 RunNo: Prep Date: SampType: mblk Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID lcs-1 Client ID: LCSW Batch ID: R44003 RunNo: Prep Date: SampType: lcs Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID mb-2 Client ID: PBW Batch ID: R44003 RunNo: Prep Date: SampType: mblk Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Sample ID lcs-2 Client ID: LCSW Batch ID: R44003 RunNo: Prep Date: SampType: lcs Analysis Date: 7/3/2017 TestCode: SM2320B: Alkalinity SeqNo: Units: mg/l CaCO3 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Alkalinity (as CaCO3) Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 19 of 20

163 QC SUMMARY REPORT Hall Environmental Analysis Laboratory, Inc. WO#: 1706F45 11-Aug-17 Client: Project: City of Las Cruces CLC Foothills Landfill Closure Monitoring Well Sample ID MB Client ID: PBW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: MBLK Analysis Date: 7/2/2017 TestCode: SM2540C MOD: Total Dissolved Solids SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Dissolved Solids 20.0 Sample ID LCS Client ID: LCSW Batch ID: RunNo: Prep Date: 6/30/2017 SampType: LCS Analysis Date: 7/2/2017 TestCode: SM2540C MOD: Total Dissolved Solids SeqNo: Units: mg/l Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit %RPD RPDLimit Qual Total Dissolved Solids Qualifiers: * Value exceeds Maximum Contaminant Level. B Analyte detected in the associated Method Blank D Sample Diluted Due to Matrix E Value above quantitation range H Holding times for preparation or analysis exceeded J Analyte detected below quantitation limits Not Detected at the Reporting Limit P Sample ph Not In Range PQL Practical Quanitative Limit RL Reporting Detection Limit S % Recovery outside of range due to dilution or matrix W Sample container temperature is out of limit as specified Page 20 of 20

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