To: Ken Kerns and Janet Dalgleish, University of Minnesota From: Jim Eidem and Kristen Schimpke Subject: Oiled Roads Investigation Summary, Delisted U

Transcription

1 Technical Memorandum To: Ken Kerns and Janet Dalgleish, University of Minnesota From: Jim Eidem and Kristen Schimpke Subject: Oiled Roads Investigation Summary Delisted UMRRC Superfund Site Date: December 22, 2016 Project: c: File This Technical Memorandum summarizes available historical information and analytical data collected in 2011 and 2016 for indications of polychlorinated biphenyl (PCB) or other contaminant-containing oils used for dust control on roadways at the delisted University of Minnesota Rosemount Research Center (UMRRC) Superfund Site as recommended in Fourth Five-Year Review Report (EPA, 2012). Historical Information During the Phase I Environmental Site Assessment for the UMore East project site (Barr, 2011), University employees familiar with past site activities indicated that dust suppression via oil spraying was conducted on the gravel roads pment (GUE), Porter Electric and Machine Company (PE), and U.S. Transformer (UST) sites (Figure 1). The specific timing and the source of the oil used for dust suppression was unknown. As part of the UMore East Remedial Investigation (Barr, 2012), five surface samples of gravel road materials (716A-SS1 through 716A-SS5) were collected on currently maintained but lesser used gravel roads servicing the commercial/industrial area south of 152 nd Street and were analyzed for PCBs. One surface sample of gravel road materials (101A-SS1) was collected near the UST site and analyzed for PCBs and semi-volatile organic compounds (SVOCs). The UMore East sample locations are shown on Figure 2. In 2016, Dakota County staff provided historic maps showing the oiled roads in July 1960 and other primary and secondary roads (Exhibit 1). Notes on the oiled roads map suggest that 15,983 gallons of oil were applied to the gravel roads in the vicinity of the GUE, PE, and UST sites in 1959 with at an average application rate of approximately 0.22 gallons per square yard. No information regarding the type or source of the oil used for dust suppression was identified. It is important to note that operations at the GUE and PE sites began in 1968 and operations at the UST site began in 1973 (i.e., after 1959 oil application) Investigation The University proposed collecting samples of current gravel road materials and underlying soils at four locations (R-B5-TT1, R-B6-TT1, R-B7-TT1, and R-B8-TT1) on the oiled roads shown on the historic maps in a June 2, 2016, to the Minnesota Pollution Control Agency (MPCA). Proposed locations R-B6-TT1, R-, Minneapolis, MN UMP024850

2 To: Ken Kerns and Janet Dalgleish, University of Minnesota From: Jim Eidem and Kristen Schimpke Subject: Oiled Roads Investigation Summary, Delisted UMRRC Superfund Site Date: December 22, 2016 Page: 2 B7-TT1, and R-B8-TT1, were located along lesser used side gravel roads (Figure 2). The University also proposed collecting a sample on Blaine Avenue (R-C7-HA1) which is a primary road in the area. The plan was revised to include a fifth sample location (R-B5-HA1) based on MPCA comments provided in an , dated June 6, Location R-B5-HA1 is located on the former service road at the former PE building/slab and is not a maintained road. The MPCA approved the revised plan in an , dated June 20, The 2016 gravel road material investigation was conducted on June 22, Four test trenches and one hand auger were completed in the unpaved road sections at the planned locations (Figure 2). The test trenches were excavated and backfilled by Stevens Drilling and Environmental and Barr staff were present to describe and photograph subsurface conditions and collect soil samples for field screening and laboratory analysis. GPS coordinates for each investigation location are included in Table 1 and descriptions and photographs of gravel road materials and field screening results (i.e., organic vapor measurements, odors, staining, etc.) are included in Exhibits 2 and 3. Samples were collected using methods in the existing Quality Assurance Project Plan for the UMore Park/Gopher Ordnance Works Remedial Investigation (Barr, 2016). At each location, samples were collected in the top 6-inches of gravel road materials and an additional sample was collected at depth (Table 1). The samples were analyzed for PCBs, polycyclic aromatic hydrocarbons (PAHs), and RCRA metals. Laboratory reports are provided in Exhibit 4. Investigation Results The data from the 2011 Soil Reference Values (SRVs) for commercial/industrial land use in Table 2 and the results are summarized below: PCBs were detected at concentrations below the Tier 2 SRVs for commercial/industrial use in four surface samples: 716A-SS1_0-716A-SS2_0- (1.3 mg/kg total PCBs), 716A-SS3_0- and R-B7-TT1_0- (0.28 mg/kg total PCBs); and in the discolored subsurface soil encountered at R -B5-TT1_0.5-. PCBs were not detected in the other 11 samples. The gravel road materials are approximately 6-inches thick at each test pit location and were underlain by finer grained, reworked and/or native materials (e.g., silt, silty sand, or topsoil). With exception to the discolored subsurface soil encountered at R -B5-TT1, no indication of a release of hazardous substances or petroleum products (i.e., no elevated headspace readings, odors, staining, debris, free oil, etc.) were observed at the sampling locations. Summary and Recommendations The results of the investigations indicate that the PCB concentrations in formerly oiled gravel road materials (and underlying soils) near the GUE, PE, and USTs sites are below SRVs for commercial/industrial use. PCBs were detected at a concentration above Tier 1 SRVs for unrestricted use in the surficial gravel road materials at location 716A-SS2 and in the discolored subsurface soils encountered at location R-B5- P:\Mpls\23 MN\19\ Former Gopher Ordnance Works\WorkFiles\Roads\Tech Memo\Text\UMRRC Oiled Roads TM_ docx UMP024851

3 To: Ken Kerns and Janet Dalgleish, University of Minnesota From: Jim Eidem and Kristen Schimpke Subject: Oiled Roads Investigation Summary, Delisted UMRRC Superfund Site Date: December 22, 2016 Page: 3 TT1. Based on the absence of an oily layer or presence of soil discoloration under the unpaved roads, it is likely that the discolored soil (and associated PCBs) at location R-B5-TT1 is the result of former operations or CERCLA remedial activities at the PE site rather than oil application for road dust suppression. Note that existing institutional controls for the PE site disclose the presence of soil impacts, limit land use to commercial/industrial activities, prohibit specific development scenarios, and prohibit the excavation and off-site use of soil (EPA, 2012). If the gravel road materials where dust suppression occurred (including the former gravel roads beneath currently paved roads) are excavated and considered for reuse as anything other than road base, it is recommended that the gravel road materials are characterized for PCBs prior to reuse. References Barr, Quality Assurance Project Plan, UMore Park/Former Gopher Ordnance Works Site, Dakota County, Minnesota. Barr, Remedial Investigation Report, UMore East, Dakota County, Minnesota. Barr, Phase I Environmental Site Assessment, UMore 1948 Parcel, Dakota County, Minnesota. EPA, Fourth Five-Year Review Report for University of Minnesota Rosemount Research Center Superfund Site, City of Rosemount, Dakota County, Minnesota. Attachments: Tables: Table 1 - Sampling Summary Table 2 - Analytical Results Figures: Figure 1 UMMRC Subsites Figure 2 - Investigation Locations (with 2016 and 1964 aerial photo backgrounds) Exhibits Exhibit 1 Historic Oiled Road Map Exhibit 2 Test Trench Logs Exhibit 3 Laboratory Reports Exhibit 4 Photograph Log P:\Mpls\23 MN\19\ Former Gopher Ordnance Works\WorkFiles\Roads\Tech Memo\Text\UMRRC Oiled Roads TM_ docx UMP024852

4 Attachments UMP024853

5 Tables UMP024854

6 UMP024855

7 UMP024856

8 UMP024857

9 Data Footnotes and Qualifiers Barr Standard Footnotes and Qualifiers -- Not analyzed/not available. N Sample Type: Normal FD Sample Type: Field Duplicate ND Not detected. * Estimated value, QA/QC criteria not met. Minnesota Tier 1 and 2 Soil Reference Values (1) Value represents the criteria for Chromium, trivalent. MP Value represents the criteria for p-cresol. T Value represents a criteria for the total carcinogenic PAHs as BaP. Page 3 of 3 12/20/2016 P:\Mpls\23 MN\19\ Former Gopher Ordnance Works\WorkFiles\Roads\Tech Memo\Tables\Table 2 - Analytical Results xlsx UMP024858

10 Figures UMP024859

11 UMP Barr Footer: ArcGIS 10.4, :33 File: I:\Client\UofM_UmorePark\Work_Orders\Former_Gopher_Ordnance_RI\Maps\Reports\Oiled Roads Tech Memo\Figure 1 - UMRRC Subsites.mxd User: kac2

12 BARBARA AVE BABCOCK AVE AUDREY AVE UMP Barr Footer: ArcGIS 10.4, :45 File: I:\Client\UofM_UmorePark\Work_Orders\Former_Gopher_Ordnance_RI\Maps\Reports\Oiled Roads Tech Memo\Figure 2 - Road Base Investigation Locations (1964).mxd User: kac2

13 BARBARA AVE BABCOCK AVE AUDREY AVE UMP Barr Footer: ArcGIS 10.4, :45 File: I:\Client\UofM_UmorePark\Work_Orders\Former_Gopher_Ordnance_RI\Maps\Reports\Oiled Roads Tech Memo\Figure 2 - Road Base Investigation Locations (2016).mxd User: kac2

14 Exhibit 1 UMP024863

15 UMP024864

16 UMP024865

17 Exhibit 2 UMP024866

18 UMP024867

19 UMP024868

20 UMP024869

21 UMP024870

22 Exhibit 3 UMP024871

23 Exhibit 3 Photograph Log - Oiled Roads Delisted UMRRC Superfund Site Dakota County, Minnesota Road base, tan gravel and fines Dark grayish brown discolored sand with fines Topsoil, black-dark brown sand with fines and fractured gravel Photo 1: Test trench R-B5-TT1 Photo 2: Test trench R-B6-TT1 P:\Mpls\23 MN\19\ Former Gopher Ordnance Works\WorkFiles\Roads\Tech Memo\Attachments\Exhibit 3 - Photograph Log.xls UMP024872

24 Exhibit 3 Photograph Log - Oiled Roads Delisted UMRRC Superfund Site Dakota County, Minnesota Photo 3: Test trench R-B7-TT1 Photo 4: Test trench R-B8-TT1 P:\Mpls\23 MN\19\ Former Gopher Ordnance Works\WorkFiles\Roads\Tech Memo\Attachments\Exhibit 3 - Photograph Log.xls UMP024873

25 Exhibit 4 UMP024874

26 August 22, 2016 REVISION Ms. Andrea Nord Minneapolis, MN Work Order Number: RE: This is a revised report. The details of the revision are listed in the case narrative on the following page. Enclosed are the results of analyses for samples received by the laboratory on 06/23/16. If you have any questions concerning this report, please feel free to contact me. Results are not blank corrected unless noted within the report. Additionally, all QC results meet requirements unless noted. All samples will be retained by, unless consumed in the analysis, at ambient conditions for 30 days from the date of this report and then discarded unless other arrangements are made. All samples were received in acceptable condition unless otherwise noted. All test results and QC meet requirements of the 2003 NELAC standard. MDH (NELAC) Accreditation # Prepared by, LEGEND TECHNICAL SERVICES, INC Bach Pham Client Manager II bpham@legend-group.com in its entirety. UMP024875

27 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received R-C7-HA1_ Soil 06/22/16 13:10 06/23/16 13:05 R-C7-HA1_ Soil 06/22/16 14:00 06/23/16 13:05 R-B5-TT1_ Soil 06/22/16 07:50 06/23/16 13:05 R-B5-TT1_ Soil 06/22/16 08:05 06/23/16 13:05 R-B6-TT1_ Soil 06/22/16 09:10 06/23/16 13:05 R-B6-TT1_ Soil 06/22/16 09:15 06/23/16 13:05 R-B7-TT1_ Soil 06/22/16 09:30 06/23/16 13:05 R-B7-TT1_ Soil 06/22/16 09:40 06/23/16 13:05 R-B8-TT1_ Soil 06/22/16 08:30 06/23/16 13:05 R-B8-TT1_ Soil 06/22/16 08:35 06/23/16 13:05 R-DUP Soil 06/22/16 00:00 06/23/16 13:05 Shipping Container Information Default Cooler Temperature ( C): 2.8 Received on ice: Yes Temperature blank was present Received on ice pack: No Received on melt water: No Ambient: No Acceptable (IH/ISO only): No Custody seals: Yes Page 2 of 31 UMP024876

28 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 Case Narrative: The recovery for the 8270 PAH compound benzo(b)fluoranthene was above laboratory acceptance limits in the batch B6G0101 MSD, but within acceptance limits in the LCS/MS. The MS/MSD source sample was not associated with this work order. The recovery for the 8270 surrogate terphenyl-d14 was below laboratory acceptance limits in sample R-B7-TT1_ All surrogate recoveries were within laboratory acceptance limits in the batch B6G0501 method blank and LCS. Samples R-B7-TT1_0-0.5, R-B8-TT1_0-0.5 and R-DUP-1 required dilution for 8270 analysis due to matrix interference. The recovery for 8082 surrogate decachlorobiphenyl was below laboratory acceptance limits in sample R-DUP-1. All surrogate recoveries were within laboratory acceptance limits in the batch B6G1101 method blank and LCS. This report was revised on August 22, 2016 to correct the data for analyses done on the ICPMS for soil samples, and to make edits to the case narrative related to these changes. The MS recoveries for silver, arsenic, barium, chromium, lead, and selenium, and the MSD recoveries for silver, arsenic, barium, chromium, and selenium were outside the method control limits for the 6020 batch B6F2710. The LCS, LCS duplicate, and % RPD were within the control limits. The source sample was not associated with this work order. The MS/MSD recoveries for arsenic, barium, chromium, lead, and selenium were outside the method control limits for the 6020 batch B6F2711. The LCS and LCS duplicate were within the control limits. The source sample was R-B8-TT1_ The internal standard for terbium was outside of method acceptance limits (70-130%) for lead in the 6020A batch B6F2711 blank. All sample internal standard recoveries were within method acceptance limits. This report supersedes the report dated July 20, Page 3 of 31 UMP024877

29 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL MERCURY ANALYSIS Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_0-0.5 ( ) Soil Sampled: 06/22/16 13:10 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G1112 R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 07/11/16 07/11/16 EPA 7473 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B5-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 07:50 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B7-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:30 Received: 06/23/16 13:05 Mercury mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 Mercury < mg/kg dry 1 B6G /11/16 07/11/16 EPA 7473 Page 4 of 31 UMP024878

30 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL METALS ANALYSIS Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_0-0.5 ( ) Soil Sampled: 06/22/16 13:10 Received: 06/23/16 13:05 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 1 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium < ug/kg dry 1 Silver < ug/kg dry 1 R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 07/18/16 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium ug/kg dry 1 Silver < ug/kg dry 1 R-B5-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 07:50 Received: 06/23/16 13:05 07/18/16 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium < ug/kg dry 1 Silver < ug/kg dry 1 R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 07/18/16 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium < ug/kg dry 1 Silver < ug/kg dry 1 R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 07/18/16 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Page 5 of 31 UMP024879

31 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL METALS ANALYSIS Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 Selenium < ug/kg dry 1 B6F2710 Silver < ug/kg dry 1 R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 06/27/16 07/19/16 07/18/16 EPA 6020A Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium ug/kg dry 1 Silver < ug/kg dry 1 07/18/16 R-B7-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:30 Received: 06/23/16 13:05 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium ug/kg dry 1 Silver < ug/kg dry 1 07/18/16 R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 Arsenic ug/kg dry 1 B6F /27/16 07/19/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium < ug/kg dry 1 07/19/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/19/16 Selenium ug/kg dry 1 Silver < ug/kg dry 1 07/18/16 R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 Arsenic ug/kg dry 1 B6F /27/16 07/20/16 EPA 6020A M2, QR-03 Barium ug/kg dry 10 07/18/16 M3 Cadmium ug/kg dry 1 07/20/16 Chromium ug/kg dry 1 07/18/16 M3 Lead ug/kg dry 1 07/20/16 M3 Selenium < ug/kg dry 1 M2, QR-03 Silver < ug/kg dry 1 07/18/16 R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 Arsenic ug/kg dry 1 B6F /27/16 07/20/16 EPA 6020A Barium ug/kg dry 1 07/18/16 Page 6 of 31 UMP024880

32 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL METALS ANALYSIS Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 Cadmium < ug/kg dry 1 B6F /27/16 07/20/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/20/16 Selenium < ug/kg dry 1 Silver < ug/kg dry 1 R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 07/18/16 EPA 6020A Arsenic ug/kg dry 1 B6F /27/16 07/20/16 EPA 6020A Barium ug/kg dry 10 07/18/16 Cadmium ug/kg dry 1 07/20/16 Chromium ug/kg dry 1 07/18/16 Lead ug/kg dry 1 07/20/16 Selenium < ug/kg dry 1 Silver < ug/kg dry 1 07/18/16 Page 7 of 31 UMP024881

33 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_0-0.5 ( ) Soil Sampled: 06/22/16 13:10 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Page 8 of 31 UMP024882

34 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 Pyrene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B5-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 07:50 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Page 9 of 31 UMP024883

35 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 Fluoranthene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 2-Chloronaphthalene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Page 10 of 31 UMP024884

36 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 Benzo(b)fluoranthene < mg/kg dry 1 B6G /01/16 07/06/16 EPA 8270D Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B7-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:30 Received: 06/23/16 13:05 D1 2-Chloronaphthalene < mg/kg dry 2 B6G /05/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 2 Acenaphthene < mg/kg dry 2 Acenaphthylene < mg/kg dry 2 Anthracene < mg/kg dry 2 Benzo(a)anthracene < mg/kg dry 2 Benzo(a)pyrene < mg/kg dry 2 Benzo(b)fluoranthene < mg/kg dry 2 Benzo(g,h,i)perylene < mg/kg dry 2 Benzo(k)fluoranthene < mg/kg dry 2 Chrysene < mg/kg dry 2 Dibenz(a,h)anthracene < mg/kg dry 2 Fluoranthene < mg/kg dry 2 Fluorene < mg/kg dry 2 Indeno (1,2,3-cd) pyrene < mg/kg dry 2 Naphthalene < mg/kg dry 2 Phenanthrene < mg/kg dry 2 Pyrene < mg/kg dry 2 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 S-BN 2-Chloronaphthalene < mg/kg dry 1 B6G /05/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Page 11 of 31 UMP024885

37 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 Acenaphthene < mg/kg dry 1 B6G /05/16 07/06/16 EPA 8270D Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 D1 2-Chloronaphthalene < mg/kg dry 2 B6G /05/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 2 Acenaphthene < mg/kg dry 2 Acenaphthylene < mg/kg dry 2 Anthracene < mg/kg dry 2 Benzo(a)anthracene < mg/kg dry 2 Benzo(a)pyrene < mg/kg dry 2 Benzo(b)fluoranthene < mg/kg dry 2 Benzo(g,h,i)perylene < mg/kg dry 2 Benzo(k)fluoranthene < mg/kg dry 2 Chrysene < mg/kg dry 2 Dibenz(a,h)anthracene < mg/kg dry 2 Fluoranthene < mg/kg dry 2 Fluorene < mg/kg dry 2 Indeno (1,2,3-cd) pyrene < mg/kg dry 2 Naphthalene < mg/kg dry 2 Phenanthrene < mg/kg dry 2 Pyrene < mg/kg dry 2 Surrogate: 2-Fluorobiphenyl % Page 12 of 31 UMP024886

38 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 D1 Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 B6G /05/16 07/06/16 EPA 8270D 2-Chloronaphthalene < mg/kg dry 1 B6G /05/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 1 Acenaphthene < mg/kg dry 1 Acenaphthylene < mg/kg dry 1 Anthracene < mg/kg dry 1 Benzo(a)anthracene < mg/kg dry 1 Benzo(a)pyrene < mg/kg dry 1 Benzo(b)fluoranthene < mg/kg dry 1 Benzo(g,h,i)perylene < mg/kg dry 1 Benzo(k)fluoranthene < mg/kg dry 1 Chrysene < mg/kg dry 1 Dibenz(a,h)anthracene < mg/kg dry 1 Fluoranthene < mg/kg dry 1 Fluorene < mg/kg dry 1 Indeno (1,2,3-cd) pyrene < mg/kg dry 1 Naphthalene < mg/kg dry 1 Phenanthrene < mg/kg dry 1 Pyrene < mg/kg dry 1 Surrogate: 2-Fluorobiphenyl % Surrogate: Nitrobenzene-d % Surrogate: Terphenyl-d % R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 D1 2-Chloronaphthalene < mg/kg dry 5 B6G /05/16 07/06/16 EPA 8270D 2-Methylnaphthalene < mg/kg dry 5 Acenaphthene < mg/kg dry 5 Acenaphthylene < mg/kg dry 5 Anthracene < mg/kg dry 5 Benzo(a)anthracene < mg/kg dry 5 Benzo(a)pyrene < mg/kg dry 5 Benzo(b)fluoranthene < mg/kg dry 5 Benzo(g,h,i)perylene < mg/kg dry 5 Benzo(k)fluoranthene < mg/kg dry 5 Chrysene < mg/kg dry 5 Dibenz(a,h)anthracene < mg/kg dry 5 Fluoranthene < mg/kg dry 5 Fluorene < mg/kg dry 5 Page 13 of 31 UMP024887

39 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 D1 Indeno (1,2,3-cd) pyrene < mg/kg dry 5 B6G /05/16 07/06/16 EPA 8270D Naphthalene < mg/kg dry 5 Phenanthrene < mg/kg dry 5 Pyrene < mg/kg dry 5 Surrogate: 2-Fluorobiphenyl Surrogate: Nitrobenzene-d5 Surrogate: Terphenyl-d % % % Page 14 of 31 UMP024888

40 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PCB 8082A Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_0-0.5 ( ) Soil Sampled: 06/22/16 13:10 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/13/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B5-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 07:50 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/13/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor mg/kg dry 5 07/13/16 Surrogate: Decachlorobiphenyl Surrogate: Tetrachloro-meta-xylene % % 07/11/16 Page 15 of 31 UMP024889

41 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PCB 8082A Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B7-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:30 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/13/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl Surrogate: Tetrachloro-meta-xylene % % Page 16 of 31 UMP024890

42 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PCB 8082A Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/13/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/11/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl % Surrogate: Tetrachloro-meta-xylene % R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 Aroclor 1016 < mg/kg dry 1 B6G /11/16 07/13/16 EPA 8082A Aroclor 1221 < mg/kg dry 1 Aroclor 1232 < mg/kg dry 1 Aroclor 1242 < mg/kg dry 1 Aroclor 1248 < mg/kg dry 1 Aroclor 1254 < mg/kg dry 1 Aroclor 1260 < mg/kg dry 1 Surrogate: Decachlorobiphenyl Surrogate: Tetrachloro-meta-xylene % % S-02 Page 17 of 31 UMP024891

43 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PERCENT SOLIDS Analyte Result RL MDL Units Dilution Batch Prepared Analyzed Method Notes R-C7-HA1_0-0.5 ( ) Soil Sampled: 06/22/16 13:10 Received: 06/23/16 13:05 % Solids 97 % 1 B6G /01/16 07/01/16 R-C7-HA1_ ( ) Soil Sampled: 06/22/16 14:00 Received: 06/23/16 13:05 % calculation % Solids 92 % 1 R-B5-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 07:50 Received: 06/23/16 13:05 % Solids 97 % 1 R-B5-TT1_0.5-1 ( ) Soil Sampled: 06/22/16 08:05 Received: 06/23/16 13:05 % Solids 94 % 1 R-B6-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:10 Received: 06/23/16 13:05 % Solids 93 % 1 R-B6-TT1_1.5-2 ( ) Soil Sampled: 06/22/16 09:15 Received: 06/23/16 13:05 % Solids 89 % 1 R-B7-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 09:30 Received: 06/23/16 13:05 % Solids 94 % 1 R-B7-TT1_1-1.5 ( ) Soil Sampled: 06/22/16 09:40 Received: 06/23/16 13:05 % Solids 86 % 1 R-B8-TT1_0-0.5 ( ) Soil Sampled: 06/22/16 08:30 Received: 06/23/16 13:05 % Solids 95 % 1 R-B8-TT1_3.5-4 ( ) Soil Sampled: 06/22/16 08:35 Received: 06/23/16 13:05 % Solids 97 % 1 R-DUP-1 ( ) Soil Sampled: 06/22/16 00:00 Received: 06/23/16 13:05 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 B6G /01/16 07/01/16 % calculation % calculation % calculation % calculation % calculation % calculation % calculation % calculation % calculation % Solids 97 % 1 B6G /01/16 07/01/16 % calculation Page 18 of 31 UMP024892

44 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL MERCURY ANALYSIS - Quality Control Analyte Spike Result RL MDL Units Level Source Result %REC %REC Limits %RPD %RPD Limit Notes Batch B6G EPA 7473 Blank (B6G1112-BLK1) Prepared & Analyzed: 07/11/16 Mercury < LCS (B6G1112-BS1) Prepared & Analyzed: 07/11/16 Mercury LCS Dup (B6G1112-BSD1) Prepared & Analyzed: 07/11/16 Mercury Matrix Spike (B6G1112-MS1) Source: Prepared & Analyzed: 07/11/16 Mercury mg/kg dry < Matrix Spike Dup (B6G1112-MSD1) Source: Prepared & Analyzed: 07/11/16 Mercury mg/kg dry < Page 19 of 31 UMP024893

45 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 TOTAL METALS ANALYSIS - Quality Control Analyte Spike Result RL MDL Units Level Source Result %REC %REC Limits %RPD %RPD Limit Notes Batch B6F EPA 3050B Blank (B6F2710-BLK1) Prepared: 06/27/16 Analyzed: 07/19/16 Arsenic < ug/kg wet Barium < ug/kg wet Cadmium < ug/kg wet Chromium < ug/kg wet Lead < ug/kg wet Selenium < ug/kg wet Silver < ug/kg wet LCS (B6F2710-BS1) Prepared: 06/27/16 Analyzed: 07/19/16 Arsenic ug/kg wet Barium ug/kg wet Cadmium ug/kg wet Chromium ug/kg wet Lead ug/kg wet Selenium ug/kg wet Silver ug/kg wet LCS Dup (B6F2710-BSD1) Prepared: 06/27/16 Analyzed: 07/19/16 Arsenic ug/kg wet Barium ug/kg wet Cadmium ug/kg wet Chromium ug/kg wet Lead ug/kg wet Selenium ug/kg wet Silver ug/kg wet Matrix Spike (B6F2710-MS1) Source: Prepared: 06/27/16 Analyzed: 07/19/16 Arsenic ug/kg dry NR M2 Barium ug/kg dry M3 Cadmium ug/kg dry Chromium ug/kg dry M3 Lead ug/kg dry M3 Selenium ug/kg dry M2 Silver ug/kg dry 379 < M2 Matrix Spike Dup (B6F2710-MSD1) Source: Prepared: 06/27/16 Analyzed: 07/19/16 Arsenic ug/kg dry NR M2 Barium ug/kg dry M3 Cadmium ug/kg dry Chromium ug/kg dry NR M3 Lead ug/kg dry Selenium ug/kg dry M2 Page 20 of 31 UMP024894

46 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 Analyte Batch B6F EPA 3050B TOTAL METALS ANALYSIS - Quality Control Spike Result RL MDL Units Level Source Result %REC %REC Limits Matrix Spike Dup (B6F2710-MSD1) Source: Prepared: 06/27/16 Analyzed: 07/18/16 Silver ug/kg dry 378 < M2 Batch B6F EPA 3050B Blank (B6F2711-BLK1) Prepared: 06/27/16 Analyzed: 07/25/16 Arsenic Barium Cadmium Chromium < < < < ug/kg wet ug/kg wet ug/kg wet ug/kg wet Lead < ug/kg wet A-01 Selenium Silver < < ug/kg wet ug/kg wet LCS (B6F2711-BS1) Prepared: 06/27/16 Analyzed: 07/25/16 Arsenic ug/kg wet Barium ug/kg wet Cadmium ug/kg wet Chromium ug/kg wet Lead ug/kg wet Selenium ug/kg wet Silver ug/kg wet LCS Dup (B6F2711-BSD1) Prepared: 06/27/16 Analyzed: 07/25/16 Arsenic ug/kg wet Barium ug/kg wet Cadmium ug/kg wet Chromium ug/kg wet Lead ug/kg wet Selenium ug/kg wet Silver ug/kg wet Matrix Spike (B6F2711-MS1) Source: Prepared: 06/27/16 Analyzed: 07/20/16 Arsenic ug/kg dry M2 Barium ug/kg dry M3 Cadmium ug/kg dry Chromium ug/kg dry M3 Lead ug/kg dry M3 Selenium ug/kg dry 1310 < M2 Silver ug/kg dry 262 < Matrix Spike Dup (B6F2711-MSD1) Source: Prepared: 06/27/16 Analyzed: 07/20/16 Arsenic ug/kg dry NR M2, QR-03 Barium ug/kg dry NR M3 %RPD %RPD Limit Notes Page 21 of 31 UMP024895

47 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 Analyte Batch B6F EPA 3050B TOTAL METALS ANALYSIS - Quality Control Spike Result RL MDL Units Level Source Result %REC %REC Limits Matrix Spike Dup (B6F2711-MSD1) Source: Prepared: 06/27/16 Analyzed: 07/20/16 Cadmium ug/kg dry Chromium ug/kg dry M3 Lead ug/kg dry M3 Selenium ug/kg dry 1280 < M2, QR-03 Silver ug/kg dry 256 < %RPD %RPD Limit Notes Page 22 of 31 UMP024896

48 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D - Quality Control Analyte Spike Result RL MDL Units Level Source Result %REC %REC Limits %RPD %RPD Limit Notes Batch B6G EPA 3545 ASE Extraction Blank (B6G0101-BLK1) Prepared: 07/01/16 Analyzed: 07/06/16 2-Methylnaphthalene < Acenaphthene < Anthracene < Benzo(a)anthracene < Benzo(a)pyrene < Benzo(b)fluoranthene < Benzo(k)fluoranthene < Chrysene < Dibenz(a,h)anthracene < Fluoranthene < Fluorene < Indeno (1,2,3-cd) pyrene < Naphthalene < Pyrene < Surrogate: 2-Fluorobiphenyl Surrogate: Nitrobenzene-d Surrogate: Terphenyl-d LCS (B6G0101-BS1) Prepared: 07/01/16 Analyzed: 07/06/16 Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(g,h,i)perylene Benzo(k)fluoranthene Chrysene Dibenz(a,h)anthracene Fluoranthene Fluorene Indeno (1,2,3-cd) pyrene Naphthalene Phenanthrene Surrogate: 2-Fluorobiphenyl Surrogate: Nitrobenzene-d Surrogate: Terphenyl-d Matrix Spike (B6G0101-MS1) Source: Prepared: 07/01/16 Analyzed: 07/05/16 Acenaphthylene mg/kg dry < Anthracene mg/kg dry 3.58 < Page 23 of 31 UMP024897

49 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 Analyte Batch B6G EPA 3545 ASE Extraction PAH 8270D - Quality Control Spike Result RL MDL Units Level Source Result %REC %REC Limits Matrix Spike (B6G0101-MS1) Source: Prepared: 07/01/16 Analyzed: 07/05/16 Benzo(a)anthracene mg/kg dry 3.58 < Benzo(a)pyrene mg/kg dry < Benzo(b)fluoranthene mg/kg dry 3.58 < Benzo(g,h,i)perylene mg/kg dry 3.58 < Benzo(k)fluoranthene mg/kg dry 3.58 < Chrysene mg/kg dry 3.58 < Dibenz(a,h)anthracene mg/kg dry 3.58 < Fluoranthene mg/kg dry 3.58 < Fluorene mg/kg dry 3.58 < Indeno (1,2,3-cd) pyrene mg/kg dry 3.58 < Naphthalene mg/kg dry 3.58 < Phenanthrene mg/kg dry < Surrogate: 2-Fluorobiphenyl 5.42 mg/kg dry Surrogate: Nitrobenzene-d mg/kg dry Surrogate: Terphenyl-d mg/kg dry Matrix Spike Dup (B6G0101-MSD1) Source: Prepared: 07/01/16 Analyzed: 07/06/16 Acenaphthylene mg/kg dry < Anthracene mg/kg dry 3.57 < Benzo(a)anthracene mg/kg dry 3.57 < Benzo(a)pyrene mg/kg dry < Benzo(b)fluoranthene mg/kg dry 3.57 < M1 Benzo(g,h,i)perylene mg/kg dry 3.57 < Benzo(k)fluoranthene mg/kg dry 3.57 < Chrysene mg/kg dry 3.57 < Dibenz(a,h)anthracene mg/kg dry 3.57 < Fluoranthene mg/kg dry 3.57 < Fluorene mg/kg dry 3.57 < Indeno (1,2,3-cd) pyrene mg/kg dry 3.57 < Naphthalene mg/kg dry 3.57 < Phenanthrene mg/kg dry < Surrogate: 2-Fluorobiphenyl 5.36 mg/kg dry Surrogate: Nitrobenzene-d mg/kg dry Surrogate: Terphenyl-d mg/kg dry %RPD %RPD Limit Notes Page 24 of 31 UMP024898

50 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D - Quality Control Analyte Spike Result RL MDL Units Level Source Result %REC %REC Limits %RPD %RPD Limit Notes Batch B6G EPA 3545 ASE Extraction Blank (B6G0501-BLK1) Prepared: 07/05/16 Analyzed: 07/07/16 2-Chloronaphthalene < Methylnaphthalene < Acenaphthene < Acenaphthylene < Anthracene < Benzo(a)anthracene < Benzo(a)pyrene < Benzo(b)fluoranthene < Benzo(g,h,i)perylene < Benzo(k)fluoranthene < Chrysene < Dibenz(a,h)anthracene < Fluoranthene < Fluorene < Indeno (1,2,3-cd) pyrene < Naphthalene < Phenanthrene < Pyrene < Surrogate: 2-Fluorobiphenyl Surrogate: Nitrobenzene-d Surrogate: Terphenyl-d LCS (B6G0501-BS1) Prepared: 07/05/16 Analyzed: 07/07/16 Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(g,h,i)perylene Benzo(k)fluoranthene Chrysene Dibenz(a,h)anthracene Fluoranthene Fluorene Indeno (1,2,3-cd) pyrene Naphthalene Phenanthrene Surrogate: 2-Fluorobiphenyl Surrogate: Nitrobenzene-d Surrogate: Terphenyl-d Page 25 of 31 UMP024899

51 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PAH 8270D - Quality Control Analyte Batch B6G EPA 3545 ASE Extraction Spike Result RL MDL Units Level Source Result %REC %REC Limits Matrix Spike (B6G0501-MS1) Source: Prepared: 07/05/16 Analyzed: 07/07/16 Acenaphthylene mg/kg dry < Anthracene mg/kg dry 3.43 < Benzo(a)anthracene mg/kg dry 3.43 < Benzo(a)pyrene mg/kg dry < Benzo(b)fluoranthene mg/kg dry 3.43 < Benzo(g,h,i)perylene mg/kg dry 3.43 < Benzo(k)fluoranthene mg/kg dry 3.43 < Chrysene mg/kg dry 3.43 < Dibenz(a,h)anthracene mg/kg dry 3.43 < Fluoranthene mg/kg dry 3.43 < Fluorene mg/kg dry 3.43 < Indeno (1,2,3-cd) pyrene mg/kg dry 3.43 < Naphthalene mg/kg dry 3.43 < Phenanthrene mg/kg dry < Surrogate: 2-Fluorobiphenyl 4.93 mg/kg dry Surrogate: Nitrobenzene-d mg/kg dry Surrogate: Terphenyl-d mg/kg dry Matrix Spike Dup (B6G0501-MSD1) Source: Prepared: 07/05/16 Analyzed: 07/07/16 Acenaphthylene mg/kg dry < Anthracene mg/kg dry 3.44 < Benzo(a)anthracene mg/kg dry 3.44 < Benzo(a)pyrene mg/kg dry < Benzo(b)fluoranthene mg/kg dry 3.44 < Benzo(g,h,i)perylene mg/kg dry 3.44 < Benzo(k)fluoranthene mg/kg dry 3.44 < Chrysene mg/kg dry 3.44 < Dibenz(a,h)anthracene mg/kg dry 3.44 < Fluoranthene mg/kg dry 3.44 < Fluorene mg/kg dry 3.44 < Indeno (1,2,3-cd) pyrene mg/kg dry 3.44 < Naphthalene mg/kg dry 3.44 < Phenanthrene mg/kg dry < Surrogate: 2-Fluorobiphenyl 4.80 mg/kg dry Surrogate: Nitrobenzene-d mg/kg dry Surrogate: Terphenyl-d mg/kg dry %RPD %RPD Limit Notes Page 26 of 31 UMP024900

52 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PCB 8082A - Quality Control Analyte Batch B6G EPA 3545 ASE Extraction Spike Result RL MDL Units Level Source Result %REC Blank (B6G1101-BLK1) Prepared & Analyzed: 07/11/16 Aroclor 1016 Aroclor 1221 Aroclor 1232 Aroclor 1242 Aroclor 1248 Aroclor 1254 Aroclor 1260 < < < < < < < %REC Limits Surrogate: Decachlorobiphenyl Surrogate: Tetrachloro-meta-xylene LCS (B6G1101-BS1) Prepared & Analyzed: 07/11/16 Aroclor Aroclor Surrogate: Decachlorobiphenyl Surrogate: Tetrachloro-meta-xylene Matrix Spike (B6G1101-MS1) Source: Prepared & Analyzed: 07/11/16 Aroclor mg/kg dry < Aroclor mg/kg dry < Surrogate: Decachlorobiphenyl mg/kg dry Surrogate: Tetrachloro-meta-xylene mg/kg dry Matrix Spike Dup (B6G1101-MSD1) Source: Prepared & Analyzed: 07/11/16 Aroclor mg/kg dry < Aroclor mg/kg dry < Surrogate: Decachlorobiphenyl mg/kg dry Surrogate: Tetrachloro-meta-xylene mg/kg dry %RPD %RPD Limit Notes Page 27 of 31 UMP024901

53 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 PERCENT SOLIDS - Quality Control Analyte Batch B6G General Preparation Spike Result RL MDL Units Level Source Result %REC Duplicate (B6G0115-DUP1) Source: Prepared & Analyzed: 07/01/16 %REC Limits % Solids 80.0 % %RPD %RPD Limit Notes Duplicate (B6G0115-DUP2) Source: Prepared & Analyzed: 07/01/16 % Solids 82.0 % Page 28 of 31 UMP024902

54 Project: Project Number: Work Order #: Minneapolis, MN Project Manager: Ms. Andrea Nord Date Reported: 08/22/16 Notes and Definitions S-BN Base/Neutral surrogate recovery outside of control limits. The data was accepted based on valid recovery of remaining two base/neutral surrogates. S-02 Surrogate recovery outside of laboratory acceptance limits. QR-03 M3 M2 M1 D1 The RPD value for the sample duplicate or MS/MSD was outside of QC acceptance limits due to matrix interference. QC batch accepted based on LCS and/or LCSD recovery and/or RPD values. The spike recovery value is unusable since the analyte concentration in the sample is disproportionate to the spike level. The associated blank spike recovery was acceptable. Matrix spike recovery was low, the associated blank spike recovery was acceptable. Matrix spike recovery was high, the associated blank spike recovery was acceptable. Sample required dilution due to matrix. A-01 Internal standard recovery was outside of method acceptance limits at 168.1%. < dry NA MDL RL RPD LCS MS Less than value listed Sample results reported on a dry weight basis Not applicable. The %RPD is not calculated from values less than the reporting limit. Method Detection Limit; Equivalent to the method LOD (Limit of Detection) Reporting Limit Relative Percent Difference Laboratory Control Spike = Blank Spike (BS) = Laboratory Fortified Blank (LFB) Matrix Spike = Laboratory Fortified Matrix (LFM) Page 29 of 31 UMP024903

55 Page 30 of 31 UMP024904

56 Page 31 of 31 UMP024905