TETRA TECH, INC. April 11, 2014

TETRA TECH, INC. April 11, 2014 Greg Haet EH&S Associate Director, Environmental Protection Office of Environment, Health & Safety University of California, Berkeley University Hall, 3rd Floor #1150 Berkeley, CA 94720 Subject: Sampling Results for Western Stege Marsh Near-Surface Sediment Samples, February 27, 2014, Sampling Event University of California, Berkeley, Richmond Field Station, Richmond, California Dear Mr. Haet: Tetra Tech, Inc. (Tetra Tech), was contracted by the University of California (UC) Berkeley to conduct sampling at the Richmond Field Station (RFS), in Richmond, California. The objective of the sampling effort was to characterize near-surface sediment in remediated portions of the Western Stege Marsh, as well as to evaluate incidental sediment contact by marsh restoration workers. This sampling event, conducted on February 27, 2014, replicates the near-surface sediment sampling conducted in January 2008, February 2009, February 2010, February 2011, February 2012, and February 2013. This letter provides the rationale for the selected sampling locations, a summary of field sampling protocols, and sample results. A figure showing the sampling locations is presented at the end of this letter. Complete analytical results are presented in Attachment 1. Sample Locations Incremental sampling methodology (ISM) (previously referred to as multi-incremental ) sampling was selected for this project to provide a comprehensive and thorough evaluation of chemical concentrations in a specific area of potential exposure, or decision unit. The ISM sampling strategy for this project was based on selecting a decision unit to best represent potential exposure by workers involved in restoration activities within remediated marsh areas. In January 2008, UC Berkeley provided Tetra Tech with site-specific boundaries of the areas where marsh restoration activities may be performed. Based on this information, one decision unit, identified as Western Stege Marsh Decision Unit 1, was identified to evaluate possible exposure areas within remediated portions of the marsh under this sampling activity. This decision unit was sampled in January 2008, February 2009, February 2010, February 2011, February 2012, February 2013, and during this event on February 27, 2014. The location and extent of the Western Stege Marsh Decision Unit 1 are presented on the figure at the end of this sampling letter. The decision unit encompassed an area recommended for sampling by the March 13, 2008, Agency for Toxic Substances and Disease Registry 1999 Harrison Street, Suite 500, Oakland, CA 94612 Tel 510.302.6300 Fax 510.433.0830 www.tetratech.com

Mr. Greg Haet April 11, 2014 Page 2 of 3 (ATSDR) and California Department of Public Health Public Health Assessment (PHA) Evaluation of Exposure to Contaminants at the University of California, Berkeley, Richmond Field Station. The PHA concluded that there was an unknown potential health risk to marsh restoration workers posed by recontamination of sediment in the remediated marsh. Surface samples at depths of 0 to 2 inches below ground surface (bgs) were collected because the decision unit is intended to characterize near-surface soils. The rationale for this sampling interval is that the sediment which workers may be exposed to during planting or weeding on the marsh plain. The near-surface sediment also represents any sediment that may be migrating within slough channels and being deposited on top of clean Bay Mud used as backfill in 2002 to 2004. Two previous sampling events were conducted in this decision unit in 2005 and 2006 using a discrete sampling methodology. Field Sampling Protocols The near-surface sediment sample was collected on February 27, 2014. The decision unit was identified in the field based on the description above and consistent with previous sampling events. One ISM surface soil sample was collected from the decision unit. The ISM soil sample consisted of 50 subsamples, or increment locations, collected from 0 to 2 inches bgs. The ISM sampling technique was used to obtain sufficient near-surface soft sediments from the decision unit to account for both compositional and distributional heterogeneity of any possible contamination. The sampling protocol followed these steps: 1. The field sampler began at a corner of the decision unit and sampled in an orthogonal pattern, moving from north to south to collect subsamples from 50 locations with the decision unit. The location of these subsamples was not critical as long as they were distributed throughout the decision unit. The subsamples were collected using one disposable trowel for the decision unit. 2. The 50 subsamples were placed into a clean, unused Ziploc bag as they were collected and mixed to form one composited ISM sample. 3. The sediment from the bag was then redistributed into a 1-inch-thick uniform layer on a clean, stainless steel baking pan. 4. Fifty incremental subsamples of the soil were randomly collected from across the uniform layer described in Step 3 using a disposable spoon and placed in the sample containers provided by the laboratory to form the final sample that was submitted to the analytical laboratory for the analyses listed below. After the samples had been collected, the sample jar was labeled, wrapped with protective bubble wrap material, and placed into a sealable plastic bag. A copy of the chain-of-custody form is presented in Attachment 1. The sample was immediately delivered to Curtis and Tompkins, Ltd., in Berkeley, California, after the sampling event, on February 27, 2014. 1999 Harrison Street, Suite 500, Oakland, CA 94612 Tel 510.302.6300 Fax 510.433.0830 www.tetratech.com

Mr. Greg Haet April 11, 2014 Page 3 of 3 Sample Results The sample was submitted for analysis of metals, pesticides, and polychlorinated biphenyls (PCB) using the methods listed below. Preparation of Sample: U.S. Environmental Protection Agency (EPA) Methods 3665A and 3050B Metals by EPA Method 6010; Mercury by EPA 7471A Pesticide analysis by EPA Method 8081A PCB analysis by EPA Method 8082 Sample results are presented below along with California Human Health Screening Levels (CHHSL) ( Use of California Human Health Screening Levels [CHHSLs] in Evaluation of Contaminated Properties California Environmental Protection Agency, January 2005). All organic constituents were reported at concentrations less than the laboratory reporting limits or less than their commercial/industrial screening levels. All metals analyzed for were detected; only arsenic was reported at a concentration exceeding its background (16 milligrams per kilogram [mg/kg], as established by the Department of Toxic Substances Control [DTSC] for RFS and the Campus Bay site) or commercial/industrial screening level. A summary of the sampling results is presented in the tables following this letter. The February 2014 sampling results were compared with the 2008 through 2013 sampling results from the same decision unit, as well as with averages from discrete samples collected from the same area during sampling events in 2005 and 2006. The analytical results from the 2014 sampling event are very similar to the previously collected data; no trends have been identified. If you have any questions or comments regarding this submittal, please call me at (510) 302-6283. Sincerely, Jason Brodersen, P.G. Project Manager Enclosures: Analytical Summary Tables Sample Location Figure Attachment 1: Analytical Results 1999 Harrison Street, Suite 500, Oakland, CA 94612 Tel 510.302.6300 Fax 510.433.0830 www.tetratech.com

POLYCHLORINATED BIPHENYLS (PCB) RESULTS REPORTED IN MILLIGRAMS PER KILOGRAM (mg/kg) Sample Location CHHSL Residential CHHSL Commercial Aroclor- 1248 0.089 0.3 PCBs (1) Aroclor- 1254 0.089 0.3 Aroclor- 1260 0.089 0.3 WSM 16 discrete sample mean* March 1, 2005 0.19 a 0.14 a 0.054 WSM 30 discrete sample mean * June 13, 2006 0.22 c ND 0.016 d WSM DU1-001 January 17, 2008 0.081 0.053 0.021 J WSM DU1-002 February 4, 2009 0.18 0.10 0.05 WSM DU1-003 February 18, 2010 0.31 0.16 0.036 J WSM DU1-004 February 22, 2011 0.048 U 0.048 U 0.048 U WSM DU1-005 February 3, 2012 0.034 U 0.096 0.068 WSM DU1-006 February 4, 2013 0.010 U 0.010 U 0.010 U WSM DU1-007 February 27, 2014 0.19 0.042 U 0.03 J Notes: a Thirteen detections b Eleven detections c Nineteen detections d Twelve detections CHHSL California human health screening level J Estimated Value ND Not detected U Not detected (1) All other PCBs not detected * For detect-only data, the mean is the arithmetic mean. For chemicals with non-detect measurements, this value is the arithmetic mean with one-half the detection limit substituted for non-detect measurements.

PESTICIDE RESULTS REPORTED IN MILLIGRAMS PER KILOGRAM (mg/kg) Pesticides (1) Sample Location Aldrin Heptachlor expoxide Endosulfan I Dieldrin Endrin Endosulfan sulfate 4,4 -DDD 4,4 -DDE 4,4 -DDT Alpha- Chlordane Gamma- Chlordane Methoxychlor CHHSL Residential CHHSL Commercial 0.033 0.13 0.13 0.52 NA NA 0.035 0.13 21 230 WSM 16 discrete sample mean* March 1, 2005 NA NA NA NA NA NA NA NA NA NA NA NA WSM 30 discrete sample mean * June 13, 2006 NA NA NA NA NA NA NA NA NA NA NA NA WSM DU1-001 January 17, 2008 0.017 U 0.017 U 0.017 U 0.033 U 0.033 U 0.033 U 0.033 U 0.033 U 0.033 U 0.017 U 0.017 U 0.17 U WSM DU1-002 February 4, 2009 0.060 U 0.060 U 0.060 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.12 U 0.060 U 0.060 U 0.60 U WSM DU1-003 February 18, 2010 0.032 U 0.032 U 0.032 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.032 U 0.032 U 0.32 U WSM DU1-004 February 22, 2011 0.017 CJ 0.033 CJ 0.0037 UJ 0.029 CJ 0.046 CJ 0.031 UJ 0.038 UJ 0.066 U 0.044 CJ 0.023 UJ 0.034 U 0.012 UJ WSM DU1-005 February 3, 2012 0.0023 CJ 0.0031 J 0.006 U 0.012 U 0.012 U 0.012 U 0.0037 J 0.0036 CJ 0.0041 CJ 0.0015 CJ 0.0015 CJ 0.06 U WSM DU1-006 February 4, 2013 0.017 U 0.017 U 0.017 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.017 U 0.017 U 0.17 U WSM DU1-007 February 27, 2014 0.037 U 0.0095 CJ 0.037 U 0.072 U 0.072 U 0.072 U 0.072 U 0.072 U 0.072 U 0.037 U 0.037 U 0.37 U Notes: C Relative percent difference between columns exceeds 40% CHHSL California human health screening level J Estimated Value NA Not available samples collected in 2005 and 2006 were not analyzed for pesticides. U Not detected (method blank contamination) (1) All other pesticides were not detected. NA NA 2.3 9.0 1.6 6.3 1.6 6.3 0.43 1.7 0.5 2.0 340 3,800

METALS RESULTS REPORTED IN MILLIGRAMS PER KILOGRAM (mg/kg) Metals Sample Location Aluminum Antimony Arsenic (1) Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Potassium Selenium Silver Sodium Thallium Vanadium Zinc CHHSL Residential CHHSL Commercial Background NA NA 30 380 16 5,200 63,000 16 190 1.7 7.5 NA NA 100,000 100,000 660 3,200 3,000 38,000 NA NA WSM 16 discrete sample mean* March 1, 2005 NA ND 55.7 ND 0.84 1.2 a NA 86.44 ND 118 NA 51.56 NA NA 2.59 ND 85.75 NA 1.15 b ND NA ND ND 276 WSM 30 discrete sample mean * June 13, 2006 NA 6.2 c 55.3 78.1 0.61 1.24 d NA 89.4 14.8 136 NA 82.1 NA NA 3.5 2.4 e 81.4 NA 1.03 f 0.29 g NA 0.51 f 81.5 321 WSM DU1-001 January 17, 2008 28,000 2.4 15 53 0.53 0.38 J 2,700 74 13 67 46,000 32 15,000 470 1.6 0.50 U 69 3,300 1.0 U 0.50 U 8,200 1.0 U 67 140 WSM DU1-002 February 4, 2009 8,800 1.3 22 31 0.89 U 0.52 J 2,600 39 10 79 26,000 44 9,600 620 1.8 1.3 48 3,900 0.73 J 0.89 U 30,000 0.89 U 39 210 WSM DU1-003 February 18, 2010 24,000 3.9 26 61 0.60 0.68 J 3,900 81 12 100 38,000 52 13,000 330 2.6 0.89 J 73 4,900 1.2 J 0.96 U 21,000 1.9 U 71 260 WSM DU1-004 February 22, 2011 23,000 11 35 57 0.67 0.50 J 3,700 78 13 110 36,000 59 13,000 360 3.0 1.8 75 4,900 2.0 U 0.34 J 23,000 2.0 U 68 280 WSM DU1-005 February 3, 2012 20,000 0.45 J 29 51 0.76 J 0.49 J 3,500 72 12 90 38,000 52 12,000 590 2.3 1.6 68 4,700 1.1 0.47 J 22,000 0.11 J 54 230 WSM DU1-006 February 4, 2013 28,000 1.2 U 28 60 0.61 0.31 J 3,600 84 16 96 45,000 56 13,000 510 2.0 1.8 83 4,600 1.2 U 0.43 J 14,000 1.2 U 77 240 WSM DU1-007 February 27, 2014 24,000 1.2 48 64 0.77 J 0.93 J 3,900 100 19 140 60,000 83 16,000 790 1.9 4.5 94 5,200 1.4 0.64 J 22,000 0.31 J 86 400 Notes: CHHSL California human health screening level NA Not available ND Not detected J Estimated Value U Not detected (1) Arsenic screening value based on DTSC-approved ambient concentration developed for the adjacent Campus Bay site. a Fifteen detections b Eight detections c Eleven detections d Twenty-two detections e Twenty-six detections f Only thirteen detections g Two detections * For detect-only data, the mean is the arithmetic mean. For chemicals with non-detect measurements, this value is the arithmetic mean with one-half the detection limit substituted for non-detect measurements. 80 320 NA NA NA NA 18 180 380 4,800 1,600 16,000 NA NA 380 4800 380 4,800 NA NA 5.0 63 530 6,700 23,000 100,000

102 163!!!!!!!!!!!! Decision Unit Boundaries (approximate)!!!! Biologically Active Permeable Barrier Wall!!!! Multi-Increment Sampling Locations (approximate)!!!!!!!!!!!!!!!!!!!!!!!! Note: Image date March 2008, courtesy of Muir Consulting!!! 80 0 80! E B R P D B A Y T R A I L Feet!!! RFS CONNECTOR TRAIL Richmond Field Station University of California, Berkeley WESTERN STEGE MARSH NEAR SURFACE SAMPLING AREA 2010-03-16 V:\Misc_GIS\Richmond_Field_Station\Projects\Coastal_Prairie_Sampling\WSM.mxd TtEMI-OAK CF

Laboratory Job Number 253912 ANALYTICAL REPORT Pesticides Tetra Tech EMI Project : STANDARD 1999 Harrison Street Location : WSM PHA Sampling Oakland, CA 94612 Level : IV Sample ID Lab ID WSMDUI-007 253912-001 This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the following signature. The results contained in this report meet all requirements of NELAC and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety. Signature: Date: 03/18/2014 Mike J. Dahlquist Project Manager mike.dahlquist@ctberk.com CA ELAP# 2896, NELAP# 4044-001 1 of 191

CASE NARRATIVE PESTICIDES (EPA 8081A) Laboratory number: 253912 Client: Tetra Tech EMI Location: WSM PHA Sampling Request Date: 02/27/14 Samples Received: 02/27/14 This data package contains sample and QC results for one soil sample, requested for the above referenced project on 02/27/14. See attached cooler receipt form for any sample receipt problems or discrepancies. Pesticides (EPA 8081A): All samples underwent sulfur cleanup using the copper option in EPA Method 3660B. All samples underwent florisil cleanup using EPA Method 3620C. Low response was observed for endrin in the ICV analyzed 03/03/14 21:34; average ICV drift met method requirements, and this analyte was not detected at or above the RL in the associated samples. High responses were observed for 4,4'-DDD and dieldrin in the CCV analyzed 03/05/14 03:30; average CCV drift met method requirements, and these analytes were not detected at or above the RL in the associated samples. High response was observed for dieldrin in the CCV analyzed 03/04/14 22:32; average CCV drift met method requirements, and this analyte was not detected at or above the RL in the associated samples. High response was observed for endosulfan sulfate in the CCV analyzed 03/04/14 22:32; average CCV drift met method requirements, and this analyte was not detected at or above the RL in the associated sample. Matrix spikes QC729727,QC729728 (batch 208482) were not reported because the parent sample required a dilution that would have diluted out the spikes. WSMDUI-007 (lab # 253912-001) was diluted due to the color of the sample extract. No other analytical problems were encountered. Page 1 of 1 23.0 2 of 191

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Results & QC Summary 6 of 191

Organochlorine Pesticides Lab #: 253912 Location: WSM PHA Sampling Client: Tetra Tech EMI Prep: EPA 3550B Project#: STANDARD Analysis: EPA 8081A Field ID: WSMDUI-007 Batch#: 208482 Lab ID: 253912-001 Sampled: 02/27/14 Matrix: Soil Received: 02/27/14 Units: ug/kg Prepared: 03/03/14 Basis: dry Analyzed: 03/05/14 Diln Fac: 5.000 Moisture: 77% Analyte Result RL MDL alpha-bhc ND 37 4.4 beta-bhc ND 37 9.0 gamma-bhc ND 37 4.7 delta-bhc ND 37 6.1 Heptachlor ND 37 4.7 Aldrin ND 37 4.5 Heptachlor epoxide 9.5 C J 37 4.8 Endosulfan I ND 37 3.8 Dieldrin ND 72 6.9 4,4'-DDE ND 72 6.7 Endrin ND 72 12 Endosulfan II ND 72 11 Endosulfan sulfate ND 72 12 4,4'-DDD ND 72 16 Endrin aldehyde ND 72 7.4 4,4'-DDT ND 72 15 alpha-chlordane ND 37 4.5 gamma-chlordane ND 37 5.4 Methoxychlor ND 370 69 Toxaphene ND 1,300 200 Surrogate %REC Limits TCMX 66 42-134 Decachlorobiphenyl 72 29-122 C= Presence confirmed, but RPD between columns exceeds 40% J= Estimated value ND= Not Detected at or above MDL RL= Reporting Limit MDL= Method Detection Limit Page 1 of 1 7.2 7 of 191

Batch QC Report Organochlorine Pesticides Lab #: 253912 Location: WSM PHA Sampling Client: Tetra Tech EMI Prep: EPA 3550B Project#: STANDARD Analysis: EPA 8081A Type: BLANK Diln Fac: 1.000 Lab ID: QC729722 Batch#: 208482 Matrix: Soil Prepared: 03/03/14 Units: ug/kg Analyzed: 03/04/14 Analyte Result RL MDL alpha-bhc ND 1.7 0.20 beta-bhc ND 1.7 0.41 gamma-bhc ND 1.7 0.21 delta-bhc ND 1.7 0.27 Heptachlor ND 1.7 0.19 Aldrin ND 1.7 0.20 Heptachlor epoxide ND 1.7 0.22 Endosulfan I ND 1.7 0.17 Dieldrin ND 3.3 0.39 4,4'-DDE ND 3.3 0.58 Endrin ND 3.3 0.55 Endosulfan II ND 3.3 0.50 Endosulfan sulfate ND 3.3 0.51 4,4'-DDD ND 3.3 0.72 Endrin aldehyde ND 3.3 0.33 4,4'-DDT ND 3.3 0.70 alpha-chlordane ND 1.7 0.20 gamma-chlordane ND 1.7 0.24 Methoxychlor ND 17 3.1 Toxaphene ND 59 9.0 Surrogate %REC Limits TCMX 78 42-134 Decachlorobiphenyl 87 29-122 ND= Not Detected at or above MDL RL= Reporting Limit MDL= Method Detection Limit Page 1 of 1 8.0 8 of 191

Batch QC Report Organochlorine Pesticides Lab #: 253912 Location: WSM PHA Sampling Client: Tetra Tech EMI Prep: EPA 3550B Project#: STANDARD Analysis: EPA 8081A Type: LCS Diln Fac: 1.000 Lab ID: QC729726 Batch#: 208482 Matrix: Soil Prepared: 03/03/14 Units: ug/kg Analyzed: 03/04/14 Analyte Spiked Result %REC Limits gamma-bhc 13.14 11.83 90 46-120 Heptachlor 13.14 13.03 99 41-124 Aldrin 13.14 12.19 93 48-122 Dieldrin 13.14 12.76 # 97 39-142 Endrin 13.14 12.26 93 45-138 4,4'-DDT 13.14 14.14 108 32-145 Surrogate %REC Limits TCMX 85 42-134 Decachlorobiphenyl 88 29-122 #= CCV drift outside limits; average CCV drift within limits per method requirements Page 1 of 1 9.0 9 of 191

Confirmation Report for 253912 PEST Soil Curtis & Tompkins Laboratories Units: ug/kg Lab ID Client ID Analyte Result Confirmation RPD %D 253912-001 WSMDUI-007 Heptachlor epoxide 9.508 J C 129.1 173 1258 C=RPD between columns exceeds 40% J=estimated Page 1 of 1 10 of 191

CURTIS & TOMPKINS INITIAL CALIBRATION FOR 253912 PEST Soil: EPA 8081A Inst : GC21 Name : GC21_Pest_062 Calnum : 244089726002 Date : 03-MAR-2014 18:22 Units : pg/ul Level File Seqnum Sample ID Analyzed Stds L1 062_023 244089726023 ISOPEST_1/2 03-MAR-2014 18:22 S24164 (2X) L2 062_024 244089726024 ISOPEST_1 03-MAR-2014 18:43 S24164 L3 062_025 244089726025 ISOPEST_2 03-MAR-2014 19:04 S24165 L4 062_026 244089726026 ISOPEST_3 03-MAR-2014 19:26 S24166 L5 062_027 244089726027 ISOPEST_4 03-MAR-2014 19:47 S24167 L6 062_028 244089726028 ISOPEST_5 03-MAR-2014 20:08 S24168 L7 062_029 244089726029 ISOPEST_6 03-MAR-2014 20:30 S24169 L8 062_030 244089726030 ISOPEST_7 03-MAR-2014 20:51 S24170 r^2 Analyte Ch L1 L2 L3 L4 L5 L6 L7 L8 Type X a0 a1 a2 Avg %RSD MnR^2 MxRSD Flg alpha-bhc A 2859.0 2922.0 2520.4 2738.8 2948.4 3452.0 3531.7 3355.6 AVRG R 3.29E-4 3041.0 12 0.990 20 gamma-bhc A 2419.0 2508.5 2226.8 2461.4 2595.7 3075.7 3123.1 2942.2 AVRG R 3.75E-4 2669.0 12 0.990 20 beta-bhc A 1040.0 1075.5 911.00 944.00 904.10 1013.8 1019.8 1219.8 AVRG R 9.84E-4 1016.0 10 0.990 20 delta-bhc A 2214.0 2330.0 2055.6 2252.5 2376.4 2921.6 2961.8 2774.6 AVRG R 4.02E-4 2485.8 14 0.990 20 Heptachlor A 2039.0 2173.5 1903.2 2092.3 2208.1 2636.8 2679.6 2499.3 AVRG R 4.39E-4 2279.0 13 0.990 20 Aldrin A 2217.0 2315.5 1954.6 2003.5 2246.1 2816.9 2701.5 2509.6 AVRG R 4.26E-4 2345.6 13 0.990 20 Heptachlor epoxide A 2045.0 2038.0 1795.4 1948.6 2003.0 2363.0 2389.9 2198.2 AVRG R 4.77E-4 2097.6 10 0.990 20 gamma-chlordane A 1929.0 1983.0 1751.4 1920.5 2003.0 2384.6 2436.7 2285.1 AVRG R 4.79E-4 2086.7 12 0.990 20 alpha-chlordane A 1852.0 1914.0 1692.6 1838.5 1907.7 2277.6 2382.4 2264.0 AVRG R 4.96E-4 2016.1 13 0.990 20 4,4'-DDE A 1746.0 1797.5 1636.1 1931.4 2143.9 2397.1 2122.8 1647.5 AVRG R 5.19E-4 1927.8 14 0.990 20 Endosulfan I A 1797.0 1892.0 1646.4 1794.1 1846.9 2170.9 2293.0 2192.9 AVRG R 5.12E-4 1954.1 12 0.990 20 Dieldrin A 1785.5 1858.8 1703.6 2014.2 2221.9 2456.0 2106.5 1593.3 AVRG R 5.08E-4 1967.5 15 0.990 20 Endrin A 1263.0 1350.0 1171.9 1314.2 1374.2 1598.2 1505.2 1282.7 AVRG R 7.37E-4 1357.4 10 0.990 20 4,4'-DDD A 1402.5 1442.3 1287.3 1430.8 1534.6 1791.4 1688.8 1400.6 AVRG R 6.68E-4 1497.3 11 0.990 20 Endosulfan II A 1450.0 1494.5 1284.1 1483.0 1584.9 1923.3 1778.9 1477.1 AVRG R 6.41E-4 1559.5 13 0.990 20 4,4'-DDT A 677.25 678.10 879.80 1086.5 1338.6 1441.2 QUAD A -4426.6 1158.92 3.322074 1016.9 0.996 0.990 20 Endrin aldehyde A 1033.5 1066.0 979.70 1068.3 1146.1 1307.1 1377.5 1313.5 AVRG R 8.61E-4 1161.5 13 0.990 20 Methoxychlor A 354.20 354.52 468.25 530.97 577.26 463.47 328.84 QUAD A -9763.9 648.971-0.31108 439.64 0.997 0.990 20 Endosulfan sulfate A 1142.5 1197.0 1056.4 1173.4 1287.3 1493.7 1498.1 1385.3 AVRG R 7.82E-4 1279.2 13 0.990 20 TCMX A 2344.0 2012.0 1755.3 1799.8 1897.2 2156.8 2172.1 2101.6 AVRG R 4.93E-4 2029.8 10 0.990 20 Decachlorobiphenyl A 1014.0 1006.8 897.80 933.60 929.73 1097.3 1132.5 1262.0 AVRG R 9.67E-4 1034.2 12 0.990 20 alpha-bhc B 13500 14662 12616 10832 14764 16343 12911 13670 AVRG R 7.32E-5 13662 12 0.990 20 gamma-bhc B 14253 14547 12647 11587 14690 15697 13156 14074 AVRG R 7.23E-5 13831 9 0.990 20 beta-bhc B 5307.0 6089.0 5364.4 4861.7 5691.9 6127.6 5197.3 5478.6 AVRG R 1.81E-4 5514.7 8 0.990 20 delta-bhc B 12002 12257 10668 9270.8 12807 14268 11425 13054 AVRG R 8.35E-5 11969 13 0.990 20 Page 1 of 4 244089726002 11 of 191

r^2 Analyte Ch L1 L2 L3 L4 L5 L6 L7 L8 Type X a0 a1 a2 Avg %RSD MnR^2 MxRSD Flg Heptachlor B 16618 16364 14054 12898 16046 17140 14318 15473 AVRG R 6.51E-5 15364 10 0.990 20 Aldrin B 12569 12771 12218 10338 13197 14588 11945 13433 AVRG R 7.92E-5 12632 10 0.990 20 Heptachlor epoxide B 13617 12467 10811 10053 12349 13464 10819 11402 AVRG R 8.42E-5 11873 11 0.990 20 gamma-chlordane B 13882 12896 10988 9875.6 12301 13455 10788 11909 AVRG R 8.33E-5 12012 12 0.990 20 alpha-chlordane B 12488 12187 10149 9259.1 11523 12793 10073 11166 AVRG R 8.92E-5 11205 11 0.990 20 4,4'-DDE B 11635 11797 9857.8 9025.0 11411 12663 9612.8 10204 AVRG R 9.28E-5 10776 12 0.990 20 Endosulfan I B 12481 12182 10286 9182.0 11271 12460 9702.0 10559 AVRG R 9.08E-5 11015 12 0.990 20 Dieldrin B 12041 12251 10302 9519.5 12122 13108 9811.3 9844.1 AVRG R 8.99E-5 11125 13 0.990 20 Endrin B 8334.5 8048.0 6977.2 5994.5 8031.0 8806.5 6452.0 7110.5 AVRG R 1.34E-4 7469.3 13 0.990 20 4,4'-DDD B 8466.0 8318.0 6943.1 6305.7 8129.9 9065.0 6715.7 7652.3 AVRG R 1.30E-4 7699.4 13 0.990 20 Endosulfan II B 9420.0 9243.3 7599.7 6880.2 8720.4 9735.3 7001.6 8022.6 AVRG R 1.20E-4 8327.9 13 0.990 20 4,4'-DDT B 8189.5 8392.5 7032.0 6636.1 8607.3 9819.9 7081.0 8178.6 AVRG R 1.25E-4 7992.1 13 0.990 20 Endrin aldehyde B 6215.0 6050.0 5401.5 4722.5 6278.2 7105.4 5118.6 6086.2 AVRG R 1.70E-4 5872.2 13 0.990 20 Methoxychlor B 3353.5 3327.0 2924.6 2630.6 3417.5 3695.0 2535.7 2356.4 AVRG R 3.30E-4 3030.0 16 0.990 20 Endosulfan sulfate B 7650.0 7695.5 6350.5 5653.4 7427.4 8244.3 6008.9 7714.2 AVRG R 1.41E-4 7093.0 13 0.990 20 TCMX B 4933.0 6234.0 5312.8 4406.6 6148.9 6567.3 5139.6 5203.7 AVRG R 1.82E-4 5493.2 14 0.990 20 Decachlorobiphenyl B 7079.5 6742.0 5864.1 5006.0 6446.7 7154.4 4883.4 6507.1 AVRG R 1.61E-4 6210.4 14 0.990 20 Average EPA 8081A A (n=23) 13 20 Average EPA 8081A B (n=23) 12 20 Page 2 of 4 244089726002 12 of 191

Spiked Amounts / Drifts Ch L1 %D L2 %D L3 %D L4 %D L5 %D L6 %D L7 %D L8 %D alpha-bhc A 1.0000-6 2.0000-4 5.0000-17 10.000-10 20.000-3 25.000 14 50.000 16 100.00 10 gamma-bhc A 1.0000-9 2.0000-6 5.0000-17 10.000-8 20.000-3 25.000 15 50.000 17 100.00 10 beta-bhc A 1.0000 2 2.0000 6 5.0000-10 10.000-7 20.000-11 25.000 0 50.000 0 100.00 20 delta-bhc A 1.0000-11 2.0000-6 5.0000-17 10.000-9 20.000-4 25.000 18 50.000 19 100.00 12 Heptachlor A 1.0000-11 2.0000-5 5.0000-16 10.000-8 20.000-3 25.000 16 50.000 18 100.00 10 Aldrin A 1.0000-5 2.0000-1 5.0000-17 10.000-15 20.000-4 25.000 20 50.000 15 100.00 7 Heptachlor epoxide A 1.0000-3 2.0000-3 5.0000-14 10.000-7 20.000-5 25.000 13 50.000 14 100.00 5 gamma-chlordane A 1.0000-8 2.0000-5 5.0000-16 10.000-8 20.000-4 25.000 14 50.000 17 100.00 10 alpha-chlordane A 1.0000-8 2.0000-5 5.0000-16 10.000-9 20.000-5 25.000 13 50.000 18 100.00 12 4,4'-DDE A 2.0000-9 4.0000-7 10.000-15 20.000 0 40.000 11 50.000 24 100.00 10 200.00-15 Endosulfan I A 1.0000-8 2.0000-3 5.0000-16 10.000-8 20.000-5 25.000 11 50.000 17 100.00 12 Dieldrin A 2.0000-9 4.0000-6 10.000-13 20.000 2 40.000 13 50.000 25 100.00 7 200.00-19 Endrin A 2.0000-7 4.0000-1 10.000-14 20.000-3 40.000 1 50.000 18 100.00 11 200.00-6 4,4'-DDD A 2.0000-6 4.0000-4 10.000-14 20.000-4 40.000 2 50.000 20 100.00 13 200.00-6 Endosulfan II A 2.0000-7 4.0000-4 10.000-18 20.000-5 40.000 2 50.000 23 100.00 14 200.00-5 4,4'-DDT A 4.0000 51 10.000-6 20.000-10 40.000-7 50.000 7 100.00 0 Endrin aldehyde A 2.0000-11 4.0000-8 10.000-16 20.000-8 40.000-1 50.000 13 100.00 19 200.00 13 Methoxychlor A 20.000 31 50.000-13 100.00-9 200.00-1 250.00 9 500.00-3 1000.0-100 Endosulfan sulfate A 2.0000-11 4.0000-6 10.000-17 20.000-8 40.000 1 50.000 17 100.00 17 200.00 8 TCMX A 2.0000 15 4.0000-1 10.000-14 20.000-11 40.000-7 50.000 6 100.00 7 200.00 4 Decachlorobiphenyl A 2.0000-2 4.0000-3 10.000-13 20.000-10 40.000-10 50.000 6 100.00 10 200.00 22 alpha-bhc B 1.0000-1 2.0000 7 5.0000-8 10.000-21 20.000 8 25.000 20 50.000-5 100.00 0 gamma-bhc B 1.0000 3 2.0000 5 5.0000-9 10.000-16 20.000 6 25.000 13 50.000-5 100.00 2 beta-bhc B 1.0000-4 2.0000 10 5.0000-3 10.000-12 20.000 3 25.000 11 50.000-6 100.00-1 delta-bhc B 1.0000 0 2.0000 2 5.0000-11 10.000-23 20.000 7 25.000 19 50.000-5 100.00 9 Heptachlor B 1.0000 8 2.0000 7 5.0000-9 10.000-16 20.000 4 25.000 12 50.000-7 100.00 1 Aldrin B 1.0000-1 2.0000 1 5.0000-3 10.000-18 20.000 4 25.000 15 50.000-5 100.00 6 Heptachlor epoxide B 1.0000 15 2.0000 5 5.0000-9 10.000-15 20.000 4 25.000 13 50.000-9 100.00-4 gamma-chlordane B 1.0000 16 2.0000 7 5.0000-9 10.000-18 20.000 2 25.000 12 50.000-10 100.00-1 alpha-chlordane B 1.0000 11 2.0000 9 5.0000-9 10.000-17 20.000 3 25.000 14 50.000-10 100.00 0 4,4'-DDE B 2.0000 8 4.0000 9 10.000-9 20.000-16 40.000 6 50.000 18 100.00-11 200.00-5 Endosulfan I B 1.0000 13 2.0000 11 5.0000-7 10.000-17 20.000 2 25.000 13 50.000-12 100.00-4 Dieldrin B 2.0000 8 4.0000 10 10.000-7 20.000-14 40.000 9 50.000 18 100.00-12 200.00-12 Endrin B 2.0000 12 4.0000 8 10.000-7 20.000-20 40.000 8 50.000 18 100.00-14 200.00-5 4,4'-DDD B 2.0000 10 4.0000 8 10.000-10 20.000-18 40.000 6 50.000 18 100.00-13 200.00-1 Endosulfan II B 2.0000 13 4.0000 11 10.000-9 20.000-17 40.000 5 50.000 17 100.00-16 200.00-4 4,4'-DDT B 2.0000 2 4.0000 5 10.000-12 20.000-17 40.000 8 50.000 23 100.00-11 200.00 2 Endrin aldehyde B 2.0000 6 4.0000 3 10.000-8 20.000-20 40.000 7 50.000 21 100.00-13 200.00 4 Methoxychlor B 10.000 11 20.000 10 50.000-3 100.00-13 200.00 13 250.00 22 500.00-16 1000.0-22 Endosulfan sulfate B 2.0000 8 4.0000 8 10.000-10 20.000-20 40.000 5 50.000 16 100.00-15 200.00 9 TCMX B 2.0000-10 4.0000 13 10.000-3 20.000-20 40.000 12 50.000 20 100.00-6 200.00-5 Decachlorobiphenyl B 2.0000 14 4.0000 9 10.000-6 20.000-19 40.000 4 50.000 15 100.00-21 200.00 5 Page 3 of 4 244089726002 13 of 191

MAW 03/04/14 : Corrected automatically drawn baseline in all levels. MAW 03/04/14 : Dropped various low and high points and adjusted curve fits for RSD and R^2 values within acceptable limits Analyst: MAW Date: 03/04/14 Reviewer: EAH Date: 03/04/14 X=A: Instrument response = a0 + amount * a1 + amount^2 * a2 (invert equation before quantitating); X=R: Instrument amount = a0 + response * a1 + response^2 * a2; AVRG=Average response factor; QUAD=Quadratic regression Page 4 of 4 244089726002 14 of 191

CURTIS & TOMPKINS 2ND SOURCE CALIBRATION SUMMARY FOR 253912 PEST Soil EPA 8081A Inst : GC21 Name : GC21_Pest_062 Calnum : 244089726002 Cal Date : 03-MAR-2014 ICV 244089726032 (062_032 03-MAR-2014) stds: S23571 Analyte Ch Spiked Quant Units %D Max Flags alpha-bhc A 20.00 19.02 pg/ul -5 15 gamma-bhc A 20.00 19.32 pg/ul -3 15 beta-bhc A 20.00 18.31 pg/ul -8 15 delta-bhc A 20.00 20.03 pg/ul 0 15 Heptachlor A 20.00 19.46 pg/ul -3 15 Aldrin A 20.00 18.87 pg/ul -6 15 Heptachlor epoxide A 20.00 19.33 pg/ul -3 15 gamma-chlordane A 20.00 19.43 pg/ul -3 15 alpha-chlordane A 20.00 19.27 pg/ul -4 15 4,4'-DDE A 20.00 19.92 pg/ul 0 15 Endosulfan I A 20.00 18.74 pg/ul -6 15 Dieldrin A 20.00 20.03 pg/ul 0 15 Endrin A 20.00 16.50 pg/ul -17 15 v- 4,4'-DDD A 20.00 18.44 pg/ul -8 15 Endosulfan II A 20.00 18.69 pg/ul -7 15 4,4'-DDT A 20.00 17.90 pg/ul -11 15 Endrin aldehyde A 20.00 19.40 pg/ul -3 15 Methoxychlor A 200.0 203.9 pg/ul 2 15 Endosulfan sulfate A 20.00 18.56 pg/ul -7 15 alpha-bhc B 20.00 17.87 pg/ul -11 15 gamma-bhc B 20.00 18.80 pg/ul -6 15 beta-bhc B 20.00 19.04 pg/ul -5 15 delta-bhc B 20.00 18.54 pg/ul -7 15 Heptachlor B 20.00 19.23 pg/ul -4 15 Aldrin B 20.00 19.64 pg/ul -2 15 Heptachlor epoxide B 20.00 18.88 pg/ul -6 15 gamma-chlordane B 20.00 18.83 pg/ul -6 15 alpha-chlordane B 20.00 18.87 pg/ul -6 15 4,4'-DDE B 20.00 19.65 pg/ul -2 15 Endosulfan I B 20.00 18.68 pg/ul -7 15 Dieldrin B 20.00 19.45 pg/ul -3 15 Endrin B 20.00 16.76 pg/ul -16 15 v- 4,4'-DDD B 20.00 18.47 pg/ul -8 15 Endosulfan II B 20.00 18.82 pg/ul -6 15 4,4'-DDT B 20.00 19.27 pg/ul -4 15 Endrin aldehyde B 20.00 19.90 pg/ul 0 15 Methoxychlor B 200.0 202.5 pg/ul 1 15 Endosulfan sulfate B 20.00 18.22 pg/ul -9 15 Average EPA 8081A A n=21 5 15 Average EPA 8081A B n=21 5 15 Analyst: MAW Date: 03/04/14 Reviewer: EAH Date: 03/04/14 -=low bias v=icv Page 1 of 1 244089726002 ICVs 15 of 191

CURTIS & TOMPKINS PERFORMANCE EVALUATION FOR 253912 PEST Soil EPA 8081A Inst : GC21 Run Name : PEM IDF : 1.0 Seqnum : 244089726021 File : 062_021 Time : 03-MAR-2014 17:39 Standards: S24117 Analyte Ch Area % Breakdown Limit Flags 4,4'-DDT A 130671 5 15 4,4'-DDE A 694 4,4'-DDD A 5695 Endrin A 78566 3 15 Endrin aldehyde A 1662 Endrin ketone A 812 4,4'-DDT B 776136 3 15 4,4'-DDE B 13826 4,4'-DDD B 9575 Endrin B 365671 13 15 Endrin aldehyde B 31822 Endrin ketone B 23512 Analyst: MAW Date: 03/04/14 Reviewer: EAH Date: 03/04/14 Page 1 of 1 16 of 191

CURTIS & TOMPKINS PERFORMANCE EVALUATION FOR 253912 PEST Soil EPA 8081A Inst : GC21 Run Name : PEM IDF : 1.0 Seqnum : 244091292032 File : 063_032 Time : 04-MAR-2014 22:11 Standards: S24117 Analyte Ch Area % Breakdown Limit Flags 4,4'-DDT A 129479 4 15 4,4'-DDE A 559 4,4'-DDD A 4210 Endrin A 74000 10 15 Endrin aldehyde A 4524 Endrin ketone A 3537 4,4'-DDT B 998267 3 15 4,4'-DDE B 10012 4,4'-DDD B 19720 Endrin B 478049 15 15 Endrin aldehyde B 44879 Endrin ketone B 38915 Analyst: MAW Date: 03/05/14 Reviewer: EAH Date: 03/05/14 Page 1 of 1 17 of 191

CURTIS & TOMPKINS PERFORMANCE EVALUATION FOR 253912 PEST Soil EPA 8081A Inst : GC21 Run Name : PEM IDF : 1.0 Seqnum : 244091292046 File : 063_046 Time : 05-MAR-2014 03:09 Standards: S24117 Analyte Ch Area % Breakdown Limit Flags 4,4'-DDT A 97196 7 15 4,4'-DDE A 507 4,4'-DDD A 7024 Endrin A 69182 11 15 Endrin aldehyde A 4476 Endrin ketone A 4090 4,4'-DDT B 852692 6 15 4,4'-DDE B 8433 4,4'-DDD B 46566 Endrin B 428959 20 15 Endrin aldehyde B 54941 Endrin ketone B 49023 Analyst: MAW Date: 03/05/14 Reviewer: EAH Date: 03/05/14 Page 1 of 1 18 of 191

CURTIS & TOMPKINS CONTINUING CALIBRATION FOR 253912 PEST Soil EPA 8081A Inst : GC21 Run Name : ISOPEST_4 IDF : 1.0 Seqnum : 244091292033 File : 063_033 Time : 04-MAR-2014 22:32 Cal : 244089726002 Caldate : 03-MAR-2014 Standards: S24167 Avg Analyte Ch RF/CF RF/CF Spiked Quant Units %D Max %D Flags alpha-bhc A 3041.0 3159.4 20.00 20.78 pg/ul 4 15 gamma-bhc A 2669.0 2810.3 20.00 21.06 pg/ul 5 15 beta-bhc A 1016.0 975.15 20.00 19.20 pg/ul -4 15 delta-bhc A 2485.8 2714.2 20.00 21.84 pg/ul 9 15 Heptachlor A 2279.0 2430.5 20.00 21.33 pg/ul 7 15 Aldrin A 2345.6 2534.4 20.00 21.61 pg/ul 8 15 Heptachlor epoxide A 2097.6 2158.2 20.00 20.58 pg/ul 3 15 gamma-chlordane A 2086.7 2143.9 20.00 20.55 pg/ul 3 15 alpha-chlordane A 2016.1 2067.1 20.00 20.51 pg/ul 3 15 4,4'-DDE A 1927.8 2216.5 40.00 45.99 pg/ul 15 15 Endosulfan I A 1954.1 1985.8 20.00 20.32 pg/ul 2 15 Dieldrin A 1967.5 2347.3 40.00 47.72 pg/ul 19 15 c+ *** Endrin A 1357.4 1463.8 40.00 43.13 pg/ul 8 15 v- 4,4'-DDD A 1497.3 1661.9 40.00 44.40 pg/ul 11 15 Endosulfan II A 1559.5 1754.0 40.00 44.99 pg/ul 12 15 4,4'-DDT A 1016.9 1179.3 40.00 39.95 pg/ul 0 15 Endrin aldehyde A 1161.5 1135.8 40.00 39.12 pg/ul -2 15 Methoxychlor A 439.64 573.18 200.0 213.5 pg/ul 7 15 Endosulfan sulfate A 1279.2 1305.5 40.00 40.82 pg/ul 2 15 TCMX A 2029.8 1959.2 40.00 38.61 pg/ul -3 15 Decachlorobiphenyl A 1034.2 996.13 40.00 38.53 pg/ul -4 15 alpha-bhc B 13662 14869 20.00 21.77 pg/ul 9 15 gamma-bhc B 13831 15240 20.00 22.04 pg/ul 10 15 beta-bhc B 5514.7 6148.6 20.00 22.30 pg/ul 11 15 delta-bhc B 11969 13333 20.00 22.28 pg/ul 11 15 Heptachlor B 15364 16772 20.00 21.83 pg/ul 9 15 Aldrin B 12632 15359 20.00 24.32 pg/ul 22 15 c+ *** Heptachlor epoxide B 11873 13101 20.00 22.07 pg/ul 10 15 gamma-chlordane B 12012 12891 20.00 21.46 pg/ul 7 15 alpha-chlordane B 11205 12245 20.00 21.86 pg/ul 9 15 4,4'-DDE B 10776 12315 40.00 45.71 pg/ul 14 15 Endosulfan I B 11015 12247 20.00 22.24 pg/ul 11 15 Dieldrin B 11125 13107 40.00 47.13 pg/ul 18 15 c+ *** Endrin B 7469.3 7369.3 40.00 39.46 pg/ul -1 15 v- 4,4'-DDD B 7699.4 8848.0 40.00 45.97 pg/ul 15 15 Endosulfan II B 8327.9 9904.9 40.00 47.57 pg/ul 19 15 c+ *** 4,4'-DDT B 7992.1 8642.5 40.00 43.26 pg/ul 8 15 Endrin aldehyde B 5872.2 7161.0 40.00 48.78 pg/ul 22 15 c+ *** Methoxychlor B 3030.0 3492.7 200.0 230.5 pg/ul 15 15 Endosulfan sulfate B 7093.0 8277.0 40.00 46.68 pg/ul 17 15 c+ *** TCMX B 5493.2 6107.2 40.00 44.47 pg/ul 11 15 Decachlorobiphenyl B 6210.4 6797.5 40.00 43.78 pg/ul 9 15 Average EPA 8081A A (n=23) 6 15 Average EPA 8081A B (n=23) 13 15 MAW 03/05/14 : Corrected automatically drawn baseline. Page 1 of 2 244091292033 19 of 191

Analyst: MAW Date: 03/05/14 Reviewer: EAH Date: 03/05/14 +=high bias -=low bias c=ccv v=icv Page 2 of 2 244091292033 20 of 191

CURTIS & TOMPKINS CONTINUING CALIBRATION FOR 253912 PEST Soil EPA 8081A Inst : GC21 Run Name : ISOPEST_4 IDF : 1.0 Seqnum : 244091292047 File : 063_047 Time : 05-MAR-2014 03:30 Cal : 244089726002 Caldate : 03-MAR-2014 Standards: S24167 Avg Analyte Ch RF/CF RF/CF Spiked Quant Units %D Max %D Flags alpha-bhc A 3041.0 3233.2 20.00 21.26 pg/ul 6 15 gamma-bhc A 2669.0 2858.6 20.00 21.42 pg/ul 7 15 beta-bhc A 1016.0 981.90 20.00 19.33 pg/ul -3 15 delta-bhc A 2485.8 2737.1 20.00 22.02 pg/ul 10 15 Heptachlor A 2279.0 2279.9 20.00 20.01 pg/ul 0 15 Aldrin A 2345.6 2625.2 20.00 22.38 pg/ul 12 15 Heptachlor epoxide A 2097.6 2187.0 20.00 20.85 pg/ul 4 15 gamma-chlordane A 2086.7 2164.8 20.00 20.75 pg/ul 4 15 alpha-chlordane A 2016.1 2100.5 20.00 20.84 pg/ul 4 15 4,4'-DDE A 1927.8 2225.7 40.00 46.18 pg/ul 15 15 Endosulfan I A 1954.1 1989.9 20.00 20.37 pg/ul 2 15 Dieldrin A 1967.5 2368.9 40.00 48.16 pg/ul 20 15 c+ *** Endrin A 1357.4 1360.0 40.00 40.08 pg/ul 0 15 v- 4,4'-DDD A 1497.3 1744.4 40.00 46.60 pg/ul 17 15 c+ *** Endosulfan II A 1559.5 1787.0 40.00 45.83 pg/ul 15 15 4,4'-DDT A 1016.9 785.55 40.00 28.59 pg/ul -29 15 c- *** Endrin aldehyde A 1161.5 1183.1 40.00 40.74 pg/ul 2 15 Methoxychlor A 439.64 495.36 200.0 183.9 pg/ul -8 15 Endosulfan sulfate A 1279.2 1316.3 40.00 41.16 pg/ul 3 15 TCMX A 2029.8 2022.2 40.00 39.85 pg/ul 0 15 Decachlorobiphenyl A 1034.2 993.30 40.00 38.42 pg/ul -4 15 alpha-bhc B 13662 14862 20.00 21.76 pg/ul 9 15 gamma-bhc B 13831 15165 20.00 21.93 pg/ul 10 15 beta-bhc B 5514.7 6009.1 20.00 21.79 pg/ul 9 15 delta-bhc B 11969 13265 20.00 22.17 pg/ul 11 15 Heptachlor B 15364 16590 20.00 21.60 pg/ul 8 15 Aldrin B 12632 15091 20.00 23.89 pg/ul 19 15 c+ *** Heptachlor epoxide B 11873 12836 20.00 21.62 pg/ul 8 15 gamma-chlordane B 12012 12556 20.00 20.91 pg/ul 5 15 alpha-chlordane B 11205 11869 20.00 21.19 pg/ul 6 15 4,4'-DDE B 10776 11861 40.00 44.03 pg/ul 10 15 Endosulfan I B 11015 11892 20.00 21.59 pg/ul 8 15 Dieldrin B 11125 12705 40.00 45.68 pg/ul 14 15 Endrin B 7469.3 7747.9 40.00 41.49 pg/ul 4 15 v- 4,4'-DDD B 7699.4 8852.1 40.00 45.99 pg/ul 15 15 Endosulfan II B 8327.9 9568.7 40.00 45.96 pg/ul 15 15 4,4'-DDT B 7992.1 7538.3 40.00 37.73 pg/ul -6 15 Endrin aldehyde B 5872.2 6683.7 40.00 45.53 pg/ul 14 15 Methoxychlor B 3030.0 3268.0 200.0 215.7 pg/ul 8 15 Endosulfan sulfate B 7093.0 7899.7 40.00 44.55 pg/ul 11 15 TCMX B 5493.2 6142.4 40.00 44.73 pg/ul 12 15 Decachlorobiphenyl B 6210.4 6886.8 40.00 44.36 pg/ul 11 15 Average EPA 8081A A (n=23) 8 15 Average EPA 8081A B (n=23) 11 15 MAW 03/05/14 : Corrected automatically drawn baseline. Page 1 of 2 244091292047 21 of 191

Analyst: MAW Date: 03/05/14 Reviewer: EAH Date: 03/05/14 +=high bias -=low bias c=ccv v=icv Page 2 of 2 244091292047 22 of 191

CURTIS & TOMPKINS SEQUENCE SUMMARY FOR 244089726 Instrument : GC21 Begun : 03/03/14 07:26 Method : EPA 8081A SOP Version : pesticides_rv17 # File Type Sample ID Matrix Batch Analyzed IDF Stds Used 001 062_001 X HEX 03/03/14 07:26 1.0 002 062_002 PEM PEM 03/03/14 07:47 1.0 1 003 062_003 CCV ISOPEST_4 03/03/14 08:08 1.0 2 ac 004 062_004 X HEX 03/03/14 10:03 1.0 005 062_005 PEM PEM 03/03/14 10:25 1.0 1 006 062_006 CCV ISOPEST_4 03/03/14 10:46 1.0 2 ac 007 062_007 CCV TOX_150 03/03/14 11:07 1.0 3 arsd av 008 062_008 SAMPLE 252758-010 Soil 207752 03/03/14 11:41 1.0 009 062_009 CCV TOX_150 03/03/14 12:04 1.0 3 arsd av 010 062_010 PEM PEM 03/03/14 12:38 1.0 1 011 062_011 CCV ISOPEST_4 03/03/14 13:00 1.0 2 ac 012 062_012 CCV ISOPEST_3 03/03/14 13:24 1.0 4 ac 013 062_013 BLANK QC729409 Water 208410 03/03/14 14:45 1.0 >ac <ac 014 062_014 BS QC729410 Water 208410 03/03/14 15:06 1.0 >ac <ac 015 062_015 BSD QC729411 Water 208410 03/03/14 15:28 1.0 >ac <ac 016 062_016 SAMPLE 253735-001 Water 208410 03/03/14 15:49 1.0 017 062_017 PEM PEM 03/03/14 16:12 1.0 1 018 062_018 CCV ISOPEST_3 03/03/14 16:34 1.0 4 ac 019 062_019 X HEX 03/03/14 16:56 1.0 020 062_020 X HEX 03/03/14 17:18 1.0 021 062_021 PEM PEM 03/03/14 17:39 1.0 1 022 062_022 IB CALIB 03/03/14 18:00 1.0 023 062_023 ICAL ISOPEST_1/2 03/03/14 18:22 1.0 5 024 062_024 ICAL ISOPEST_1 03/03/14 18:43 1.0 5 025 062_025 ICAL ISOPEST_2 03/03/14 19:04 1.0 6 026 062_026 ICAL ISOPEST_3 03/03/14 19:26 1.0 4 027 062_027 ICAL ISOPEST_4 03/03/14 19:47 1.0 2 028 062_028 ICAL ISOPEST_5 03/03/14 20:08 1.0 7 029 062_029 ICAL ISOPEST_6 03/03/14 20:30 1.0 8 030 062_030 ICAL ISOPEST_7 03/03/14 20:51 1.0 9 031 062_031 X HEX 03/03/14 21:13 1.0 032 062_032 ICV PEST_ICV 03/03/14 21:34 1.0 10 033 062_033 X ICV 03/03/14 21:55 1.0 10 034 062_034 CCV CHLOR_150 03/03/14 22:17 1.0 11 035 062_035 CCV TOX_150 03/03/14 22:38 1.0 3 036 062_036 X HEX 03/03/14 22:59 1.0 037 062_037 IB CALIB 03/03/14 23:20 1.0 038 062_038 ICAL TOX_40 03/03/14 23:42 1.0 12 039 062_039 ICAL TOX_75 03/04/14 00:03 1.0 3 040 062_040 ICAL TOX_150 03/04/14 00:24 1.0 3 041 062_041 ICAL TOX_250 03/04/14 00:46 1.0 13 042 062_042 ICAL TOX_500 03/04/14 01:07 1.0 13 043 062_043 ICAL TOX_750 03/04/14 01:28 1.0 14 044 062_044 ICAL TOX_1000 03/04/14 01:50 1.0 15 045 062_045 X HEX 03/04/14 02:11 1.0 046 062_046 X UTOX_150 03/04/14 02:32 1.0 16 047 062_047 ICV UTOX_150 03/04/14 02:53 1.0 16 MAW 03/03/14 : I verified that the vials loaded on the instrument matched the sequence data entry, for runs 1 through 9. MAW 03/04/14 : I verified that the vials loaded on the instrument matched the Page 1 of 2 23 of 191

CURTIS & TOMPKINS SEQUENCE SUMMARY FOR 244089726 Instrument : GC21 Begun : 03/03/14 07:26 Method : EPA 8081A SOP Version : pesticides_rv17 sequence data entry, for runs 10 through 47. Standards used: 1=S24117 2=S24167 3=S23449 4=S24166 5=S24164 6=S24165 7=S24168 8=S24169 9=S24170 10=S23571 11=S23986 12=S23448 13=S23450 14=S23452 15=S23451 16=S23719 Flags used: <=opening >=closing ac=average CCV drift out arsd=average ICAL %RSD out av=average ICV drift out Page 2 of 2 24 of 191

CURTIS & TOMPKINS SEQUENCE SUMMARY FOR 244091292 Instrument : GC21 Begun : 03/04/14 09:32 Method : EPA 8081A SOP Version : pesticides_rv17 # File Type Sample ID Matrix Batch Analyzed IDF Stds Used 001 063_001 X HEX 03/04/14 09:32 1.0 002 063_002 PEM PEM 03/04/14 09:53 1.0 1 003 063_003 CCV ISOPEST_3 03/04/14 10:15 1.0 2 004 063_004 CCV TOX_150 03/04/14 10:36 1.0 3 arsd av 005 063_005 SAMPLE 252758-010 Soil 207752 03/04/14 11:24 1.0 006 063_006 PEM PEM 03/04/14 11:45 1.0 1 007 063_007 CCV TOX_150 03/04/14 12:07 1.0 3 arsd av 008 063_008 CCV ISOPEST_2 03/04/14 12:28 1.0 4 ac 009 063_009 BLANK QC729409 Water 208410 03/04/14 13:04 1.0 <ac 010 063_010 BS QC729410 Water 208410 03/04/14 13:25 1.0 <ac 011 063_011 BSD QC729411 Water 208410 03/04/14 13:47 1.0 <ac 012 063_012 SAMPLE 253735-001 Water 208410 03/04/14 14:08 1.0 013 063_013 SAMPLE 253831-001 Water 208410 03/04/14 14:29 1.0 <ac 014 063_014 SAMPLE 253921-009 Water 208410 03/04/14 14:51 3.0 <ac 015 063_015 PEM PEM 03/04/14 15:13 1.0 1 016 063_016 X CCV 03/04/14 15:34 1.0 2 017 063_017 CCV ISOPEST_4 03/04/14 16:45 1.0 5 018 063_018 BLANK QC729409 Water 208410 03/04/14 17:06 1.0 019 063_019 SAMPLE 253735-001 Water 208410 03/04/14 17:27 1.0 020 063_020 PEM PEM 03/04/14 17:49 1.0 1 021 063_021 CCV ISOPEST_4 03/04/14 18:10 1.0 5 022 063_022 SAMPLE 253770-001 Soil 208445 03/04/14 18:37 1.0 023 063_023 SAMPLE 253770-002 Soil 208445 03/04/14 18:58 1.0 024 063_024 MSS 253770-003 Soil 208445 03/04/14 19:20 1.0 025 063_025 SAMPLE 253832-007 Soil 208445 03/04/14 19:41 5.0 026 063_026 SAMPLE 253832-008 Soil 208445 03/04/14 20:02 2.0 027 063_027 SAMPLE 253832-010 Soil 208445 03/04/14 20:24 5.0 028 063_028 SAMPLE 253832-017 Soil 208445 03/04/14 20:45 5.0 029 063_029 SAMPLE 253832-018 Soil 208445 03/04/14 21:06 1.0 030 063_030 SAMPLE 253832-021 Soil 208445 03/04/14 21:28 1.0 031 063_031 SAMPLE 253832-022 Soil 208445 03/04/14 21:49 1.0 032 063_032 PEM PEM 03/04/14 22:11 1.0 1 033 063_033 CCV ISOPEST_4 03/04/14 22:32 1.0 5 034 063_034 X IB 03/04/14 22:53 1.0 035 063_035 BLANK QC729722 Soil 208482 03/04/14 23:15 1.0 036 063_036 LCS QC729726 Soil 208482 03/04/14 23:36 1.0 037 063_037 MSS 253925-001 Soil 208482 03/04/14 23:57 1.0 8:ACHLORDANE=710 038 063_038 MS QC729727 Soil 208482 03/05/14 00:19 1.0 10:GCHLORDANE=570 039 063_039 MSD QC729728 Soil 208482 03/05/14 00:40 1.0 040 063_040 SAMPLE 253912-001 Soil 208482 03/05/14 01:01 5.0 041 063_041 SAMPLE 253918-001 Soil 208482 03/05/14 01:23 1.0 042 063_042 SAMPLE 253918-002 Soil 208482 03/05/14 01:44 1.0 043 063_043 SAMPLE 253918-003 Soil 208482 03/05/14 02:05 1.0 044 063_044 SAMPLE 253921-011 Soil 208482 03/05/14 02:27 10.0 045 063_045 SAMPLE 253921-012 Soil 208482 03/05/14 02:48 1.0 046 063_046 PEM PEM 03/05/14 03:09 1.0 1 047 063_047 CCV ISOPEST_4 03/05/14 03:30 1.0 5 MAW 03/04/14 : I verified that the vials loaded on the instrument matched the sequence data entry, for runs 1 through 8. MAW 03/04/14 : I verified that the vials loaded on the instrument matched the Page 1 of 2 25 of 191

CURTIS & TOMPKINS SEQUENCE SUMMARY FOR 244091292 Instrument : GC21 Begun : 03/04/14 09:32 Method : EPA 8081A SOP Version : pesticides_rv17 sequence data entry, for runs 9 through 16. MAW 03/04/14 : I verified that the vials loaded on the instrument matched the sequence data entry, for runs 17 through 21. MAW 03/05/14 : I verified that the vials loaded on the instrument matched the sequence data entry, for runs 22 through 47. Standards used: 1=S24117 2=S24166 3=S23449 4=S24165 5=S24167 Flags used: <=opening ac=average CCV drift out arsd=average ICAL %RSD out av=average ICV drift out Page 2 of 2 26 of 191

SAMPLE PREPARATION SUMMARY Batch # : 208482 Analysis : 8081 Started By : MB3 Prep Date : 03-MAR-2014 09:45 Finished By : MB3 Method : 3550B SOP Version : 8081_3550_rv14 Units : g Spike #1 ID : S24216 Spike #2 ID : S23974 Spike #3 ID : S24100 Sample Stype Matrix Initial Final Clean Prep ph Sp 1 Sp 2 Sp 3 Clean Analysis Comments DF DF Vol Vol Vol Method 253912-001 Soil 29.78 20 1 0.6716.8 8081, PCB 253918-001 Soil 29.89 20 1 0.6691.8 8081 253918-002 Soil 29.6 20 1 0.6757.8 8081 253918-003 Soil 30.5 20 1 0.6557.8 8081 253921-011 Soil 29.79 20 1 0.6714.8 8081, PCB 253921-012 Soil 29.88 20 1 0.6693.8 8081, PCB 253925-001 Soil 30.19 20 1 0.6625.8 8081, PCB mss 253925-002 Soil 30.03 20 1 0.666.8 8081, PCB 253925-003 Soil 30.35 20 1 0.659.8 8081, PCB 253925-004 Soil 29.68 20 1 0.6739.8 8081, PCB 253925-005 Soil 29.56 20 1 0.6766.8 8081, PCB QC729722 BLANK Soil 30.32 20 1 0.6596.8 PCB QC729723 LCS Soil 30.1 20 1 0.6645.8 1 PCB QC729724 MS Soil 29.59 20 1 0.6759.8 1 PCB QC729725 MSD Soil 30.04 20 1 0.6658.8 1 PCB QC729726 LCS Soil 30.45 20 1 0.6568.8.4 8081 QC729727 MS Soil 30.33 20 1 0.6594.8.4 8081 QC729728 MSD Soil 30.37 20 1 0.6585.8.4 8081 EAH 03/04/14 : Reviewed for PCB and check batch documents for pest. MAW 03/05/14 : Matrix spikes QC729727,QC729728 (batch 208482) were not reported because the parent sample required a dilution that would have diluted out the spikes. KMH: 03/04/14 MAW: 03/05/14 EAH: 03/05/14 Page 1 of 1 27 of 191

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REPORTING SUMMARY FOR 253912 PEST Soil Sample ID Analyte Inst ID Ch Date & Time 253912-001 alpha-bhc GC21 A 03/05/14 01:01 253912-001 beta-bhc GC21 A 03/05/14 01:01 253912-001 gamma-bhc GC21 A 03/05/14 01:01 253912-001 delta-bhc GC21 A 03/05/14 01:01 253912-001 Heptachlor GC21 B 03/05/14 01:01 253912-001 Aldrin GC21 A 03/05/14 01:01 253912-001 Heptachlor epoxide GC21 A 03/05/14 01:01 253912-001 Endosulfan I GC21 A 03/05/14 01:01 253912-001 Dieldrin GC21 B 03/05/14 01:01 253912-001 4,4'-DDE GC21 B 03/05/14 01:01 253912-001 Endrin GC21 A 03/05/14 01:01 253912-001 Endosulfan II GC21 A 03/05/14 01:01 253912-001 Endosulfan sulfate GC21 B 03/05/14 01:01 253912-001 4,4'-DDD GC21 A 03/05/14 01:01 253912-001 Endrin aldehyde GC21 A 03/05/14 01:01 253912-001 4,4'-DDT GC21 B 03/05/14 01:01 253912-001 alpha-chlordane GC21 A 03/05/14 01:01 253912-001 gamma-chlordane GC21 A 03/05/14 01:01 253912-001 Methoxychlor GC21 A 03/05/14 01:01 253912-001 Toxaphene GC21 A 03/05/14 01:01 253912-001 TCMX GC21 A 03/05/14 01:01 253912-001 Decachlorobiphenyl GC21 A 03/05/14 01:01 QC729722 alpha-bhc GC21 A 03/04/14 23:15 QC729722 beta-bhc GC21 A 03/04/14 23:15 QC729722 gamma-bhc GC21 A 03/04/14 23:15 QC729722 delta-bhc GC21 A 03/04/14 23:15 QC729722 Heptachlor GC21 A 03/04/14 23:15 QC729722 Aldrin GC21 A 03/04/14 23:15 QC729722 Heptachlor epoxide GC21 A 03/04/14 23:15 QC729722 Endosulfan I GC21 A 03/04/14 23:15 QC729722 Dieldrin GC21 A 03/04/14 23:15 QC729722 4,4'-DDE GC21 A 03/04/14 23:15 QC729722 Endrin GC21 A 03/04/14 23:15 QC729722 Endosulfan II GC21 A 03/04/14 23:15 QC729722 Endosulfan sulfate GC21 A 03/04/14 23:15 QC729722 4,4'-DDD GC21 A 03/04/14 23:15 QC729722 Endrin aldehyde GC21 A 03/04/14 23:15 QC729722 4,4'-DDT GC21 B 03/04/14 23:15 QC729722 alpha-chlordane GC21 A 03/04/14 23:15 QC729722 gamma-chlordane GC21 A 03/04/14 23:15 QC729722 Methoxychlor GC21 A 03/04/14 23:15 QC729722 Toxaphene GC21 A 03/04/14 23:15 QC729722 TCMX GC21 A 03/04/14 23:15 QC729722 Decachlorobiphenyl GC21 A 03/04/14 23:15 QC729726 gamma-bhc GC21 A 03/04/14 23:36 QC729726 Heptachlor GC21 A 03/04/14 23:36 QC729726 Aldrin GC21 A 03/04/14 23:36 QC729726 Dieldrin GC21 A 03/04/14 23:36 QC729726 Endrin GC21 A 03/04/14 23:36 QC729726 4,4'-DDT GC21 B 03/04/14 23:36 QC729726 TCMX GC21 A 03/04/14 23:36 QC729726 Decachlorobiphenyl GC21 A 03/04/14 23:36 Page 1 of 1 32 of 191

Laboratory Job Number 253912 ANALYTICAL REPORT PCBs Tetra Tech EMI Project : STANDARD 1999 Harrison Street Location : WSM PHA Sampling Oakland, CA 94612 Level : IV Sample ID Lab ID WSMDUI-007 253912-001 This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the following signature. The results contained in this report meet all requirements of NELAC and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety. Signature: Date: 03/18/2014 Mike J. Dahlquist Project Manager mike.dahlquist@ctberk.com CA ELAP# 2896, NELAP# 4044-001 1 of 197

CASE NARRATIVE PCBS (EPA 8082) Laboratory number: 253912 Client: Tetra Tech EMI Location: WSM PHA Sampling Request Date: 02/27/14 Samples Received: 02/27/14 This data package contains sample and QC results for one soil sample, requested for the above referenced project on 02/27/14. See attached cooler receipt form for any sample receipt problems or discrepancies. PCBs (EPA 8082): All samples underwent sulfuric acid cleanup using EPA Method 3665A. All samples underwent sulfur cleanup using the copper option in EPA Method 3660B. Matrix spikes QC729727,QC729728 (batch 208482) were not reported because the parent sample required a dilution that would have diluted out the spikes. No other analytical problems were encountered. Page 1 of 1 24.0 2 of 197

Results & QC Summary 6 of 197

Polychlorinated Biphenyls (PCBs) Lab #: 253912 Location: WSM PHA Sampling Client: Tetra Tech EMI Prep: EPA 3550B Project#: STANDARD Analysis: EPA 8082 Field ID: WSMDUI-007 Batch#: 208482 Lab ID: 253912-001 Sampled: 02/27/14 Matrix: Soil Received: 02/27/14 Units: ug/kg Prepared: 03/03/14 Basis: dry Analyzed: 03/04/14 Diln Fac: 1.000 Moisture: 77% Analyte Result RL MDL Aroclor-1016 ND 42 10 Aroclor-1221 ND 84 28 Aroclor-1232 ND 42 14 Aroclor-1242 ND 42 13 Aroclor-1248 190 42 13 Aroclor-1254 ND 42 11 Aroclor-1260 30 J 42 6.8 Surrogate %REC Limits TCMX 100 60-140 Decachlorobiphenyl 84 36-133 J= Estimated value ND= Not Detected at or above MDL RL= Reporting Limit MDL= Method Detection Limit Page 1 of 1 2.1 7 of 197