Andrew Nichols Remediation Division Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155

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Transcription:

Integral Consulting Inc. 285 Century Place Suite 190 Louisville, CO 80027 telephone: 303.404.2944 facsimile: 303.404.2945 www.integral-corp.com June 19, 2017 Project No. C594 Andrew Nichols Remediation Division Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155 Subject: Soil Vapor Extraction Shutdown Evaluation Report Former Ashland Lease Area Soo Line Shoreham Yard (SF) Site ID SR380 Dear Andrew: On behalf of Ashland Inc. (Ashland), this letter provides the results for shutdown testing of the Former Ashland Lease Area (FALA) soil vapor extraction (SVE) system and a work plan for soil gas sampling on the east side of Central Avenue. SHUTDOWN EVALUATION Per the 2005 interim response action plan (IRAP) 1, SVE shutdown testing in the form of rebound and restart evaluations can commence at the point that an asymptotically low rate of mass removal is observed. The IRAP states that if the mass removal rate repeatedly rebounds not more than 15 percent higher than the asymptotic removal rate, the system will be shut down. The FALA alluvium SVE system reached a state of asymptotic removal in 2012. The till SVE system was near asymptotic in 2012, with low mass removal rates, and continued to operate to stimulate aerobic degradation at the water table until late 2016, when the till system also reached an asymptotic state. The FALA SVE shutdown test occurred from December 2016 to January 2017 and consisted of three cycles, each with one 1 Golder. 2005. Interim response action plan for the former Ashland/Rocket lease area, East Side Shoreham facility, VIC program site ID VP5080 and the Petroleum Brownfields Program leak site No. 11600, Minneapolis, MN. May. Golder Associates Inc., Cherry Hill, NJ.

Andrew Nichols June 19, 2017 Page 2 week of system shutdown followed by one week of system operation. The test was performed in accordance with the October 3, 2016 2 work plan, approved by the Minnesota Pollution Control Agency (MPCA) on November 2, 2016. Prior to the start of the test, an ad hoc soil gas sample was collected for volatile organic compound (VOC) analysis by U.S. Environmental Protection Agency TO-15 from the shallow vapor monitoring point T-VM-4S. T-VM-4S serves as a receptor-depth (4 feet below ground surface) location on the east side of Central Avenue (Figure 1). Sampling of T-VM-4S began in 2013, upon temporary shutdown of the alluvium SVE system, and sampling was suspended in 2014, after trichloroethene (TCE) concentrations in two successive warm weather samples were below the MPCA intrusion screening value (ISV) for commercial/industrial sub-slab air. T-VM-4S was not scheduled to be monitored again until after final rebound testing; however, it was decided sampling before rebound testing (till system in operation) would be beneficial to evaluate conditions after the 2-year alluvium system shutdown period. Additional ad hoc VOC samples from T-VM-4S were planned during the rebound test while both SVE systems were off. However, no further samples could be collected as the shallow vapor monitoring point was blocked by ice near the ground surface for the duration of the test. Following collection of the soil gas sample on December 6, 2016, the alluvium system was restarted. Initial samples for VOC analysis were collected from the till and alluvium manifolds on December 13 and 14, 2016, respectively, after the alluvium system had been on for 1 week. The sample canister for the initial alluvium manifold sample was received without vacuum, delaying the sample collection and start of the test by 1 day until a replacement canister was obtained. No further sample collection issues were encountered during the test. The first shutdown test cycle began on December 14, 2016, with the shutdown of both the till and alluvium systems. On December 20, 2016, after the 1-week rebound period, both systems were turned on and VOC samples were collected from the till and alluvium manifolds at 2 hours, 24 hours, 72 hours, and 1 week after system restart. The manifolds were also monitored by photoionization detector (PID) at the same time intervals after system restart. System operational data were collected during each site visit. The second and third shutdown test cycles proceeded in the same manner, and the test was concluded on January 24, 2017. The alluvium system was shut off at the conclusion of the test and the till system remained on. 2 Integral. 2016. Soil vapor extraction system operations, Former Ashland Lease Area Soo Line Shoreham Yard (SF), Site ID SR380. October 3. Integral Consulting Inc., Louisville, CO.

Andrew Nichols June 19, 2017 Page 3 SHUTDOWN EVALUATION RESULTS VOC results for the till and alluvium manifolds are presented in Tables 1 and 2, respectively. The sum of chlorinated, non-chlorinated, and all VOCs is presented at the bottom of each table. VOCs detected in both systems consisted mainly of chlorinated VOCs and ranged from 158 to 1,252 µg/m 3 total VOCs in the till and 64 to 1,285 µg/m 3 total VOCs in the alluvium. PID readings were low throughout the test, ranging from 0 to 0.2 ppm, and therefore were not used in the rebound evaluation. All VOC laboratory reports are attached in Appendix A. Table 3 contains a summary of VOC concentrations, flow rates, mass removed, and mass removal rates for each system. First, instantaneous removal rates were calculated at each sample time by multiplying the concentration by the flow rate. Then, the mass removed for each time interval was calculated using the instantaneous removal rates (e.g., the 2-hour sample was used to calculate the mass removed from 0 to 2 hours after system restart, the average of the 2-hour and 24-hour samples was used to calculate the mass removed from 2 to 24 hours). An average cycle recovery rate was calculated by dividing the total mass removed by the total elapsed time, including the shutdown period (i.e., the entire 2-week cycle). The rates for the three cycles were then averaged to determine the overall shutdown test removal rates. At the bottom of Table 3, the overall average shutdown test removal rate (average of the three cycles) is compared to the average asymptotic removal rate for each system. The shutdown test rates were an order of magnitude lower than the asymptotic rates for both systems, 0.00004 lb/hr versus 0.00094 lb/hr in the till system and 0.00036 lb/hr versus 0.00420 lb/hr in the alluvium system. The asymptotic removal rates are defined as the average rate for the period used in the Mann-Kendall trend analysis (presented in August 14, 2012 3 and October 3, 2016 4 letters to MPCA). The average rates as well as the instantaneous rates are displayed in Figure 2. In addition to the low shutdown test removal rates, no single instantaneous removal rate rebounded above the average asymptotic rates in the respective systems. Table 4 presents TCE results from shallow vapor monitoring point, T-VM-4S, on the east side of Central Avenue. The December 6, 2016, sample, collected prior to the test, contained 96 µg/m 3 TCE. Although this concentration is increased compared to the samples collected in 2013 and 2014, it is below the MPCA commercial/industrial sub-slab 3 Integral. 2012. Vapor investigation and soil vapor extraction system operations, Former Ashland Lease Area Soo Line Shoreham Yard (SF), Site ID SR380. August 14. Integral Consulting Inc., Louisville, CO. 4 See footnote 2.

Andrew Nichols June 19, 2017 Page 4 air ISV of 230 µg/m 3 (i.e., 33 times the commercial/industrial indoor air ISV). 5 All other detected compounds were also below their respective commercial/industrial sub-slab air ISVs. SYSTEM SHUTDOWN AND SOIL GAS REBOUND TESTING Because recent shutdown testing performed at the FALA did not rebound above the asymptotic removal rate, it is recommended that the FALA till and alluvium systems be shut down while confirmatory soil and soil gas testing are performed. The IRAP states soil gas testing shall be performed in the median of Central Avenue and at the eastern side of Central Avenue. Because of access issues on the median of Central Avenue and the low recovery rates observed during rebound testing, Ashland proposes to monitor only the T-VM-4S point on the east side of Central Avenue, commencing in the third quarter of 2017. Soil gas rebound testing would proceed in the same manner as outlined in the August 14, 2012, letter when the alluvium system was first shut down. Samples will be collected quarterly for one year and analyzed for VOCs by TO-15. If two successive warm weather samples (when concentrations peak) are less than the commercial/industrial subslab air ISVs, soil gas monitoring will be concluded. However, if T-VM-4S VOC concentrations are above the commercial/industrial sub-slab air ISVs, then a plan for delineation of the extent of soil gas above ISVs will be submitted to MPCA. A separate work plan will be submitted for confirmatory soil testing. We would appreciate a response to this letter by June 30, 2017, so that we may initiate soil gas testing for the remaining warm weather season in 2017. If you have any questions, please call me at (720) 465-3319. Sincerely, Steven O. Helgen Principal Geochemist Enclosures 5 MPCA. 2017. Interim ISV short guidance. February 13. Minnesota Pollution Control Agency, Minneapolis, MN.

Andrew Nichols June 19, 2017 Page 5 cc: Tom Frame, City of Minneapolis James Vondracek, Ashland LeeAnn Thomas, CP Aimee Zack, CP Steve Finn, Golder Claire Mackler, Golder Councilman Kevin Reich, Minneapolis City Council First Ward Michelle Brodin, Stinson Leonard Street

FIGURES

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0.005 FALA SVE Shutdown Test VOC Mass Removal Rates Alluvium Average Asymptotic Mass Removal Rate (April 2010 to April 2012) 0.004 0.003 0.002 0.001 0.000 12/14/2016 12/15/2016 12/16/2016 12/17/2016 12/18/2016 12/19/2016 12/20/2016 12/21/2016 12/22/2016 12/23/2016 12/24/2016 12/25/2016 12/26/2016 12/27/2016 12/28/2016 12/29/2016 12/30/2016 12/31/2016 1/1/2017 1/2/2017 1/3/2017 1/4/2017 1/5/2017 1/6/2017 1/7/2017 1/8/2017 1/9/2017 1/10/2017 1/11/2017 1/12/2017 1/13/2017 1/14/2017 1/15/2017 1/16/2017 1/17/2017 1/18/2017 1/19/2017 1/20/2017 VOC Mass Removal Rate (lb/hr) 1/21/2017 1/22/2017 1/23/2017 1/24/2017 Till Average Asymptotic Mass Removal Rate (June 2014 to March 2016) Rebound System OFF Restart System ON CYCLE 1 Rebound System OFF Restart System ON CYCLE 2 Rebound System OFF Restart System ON CYCLE 3 Till Shutdown Test Till Shutdown Test Avg Till Asymptotic Avg Alluvium Shutdown Test Alluvium Shutdown Test Avg Alluvium Asymptotic Avg Figure 2. SVE Shutdown Test VOC Mass Removal Rates and Average Shutdown Test and Average Asymptotic Removal Rates in the Till and Alluvium SVE Systems

TABLES

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 1. VOCs Measured ( TO-15) in the Till Manifold Till Manifold Concentration (µg/m 3 ) Cycle 1 Cycle 2 Cycle 3 Initial Off On 2 hr On 24 hr On 72 hr On 1 wk Off On 2 hr On 24 hr On 72 hr On 1 wk Off On 2 hr On 24 hr On 72 hr On 1 wk Analyte 12/13/2016 12/20/2016 12/21/2016 12/23/2016 12/27/2016 1/3/2017 1/4/2017 1/6/2017 1/10/2017 1/17/2017 1/18/2017 1/20/2017 1/24/2017 Freon 12 14 ND ND ND ND ND ND ND ND ND ND ND ND Freon 114 ND ND ND ND ND ND ND ND ND ND ND ND ND Chloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND Vinyl Chloride ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3-Butadiene ND ND ND ND ND ND ND ND ND ND ND ND ND Bromomethane ND ND ND ND ND ND ND ND ND ND ND ND ND Chloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Freon 11 ND ND ND ND ND ND ND ND ND ND ND ND ND Ethanol ND ND ND 7.9 ND ND ND 7.1 ND 18 8.9 20 ND Freon 113 ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1-Dichloroethene ND ND ND ND ND ND ND ND ND ND ND ND ND Acetone 22 ND ND 40 ND ND ND 23 ND ND 30 47 ND 2-Propanol ND ND ND ND ND ND ND ND ND ND 8.8 19 ND Carbon Disulfide ND ND ND ND ND ND ND ND ND ND ND ND ND 3-Chloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND Methylene Chloride ND ND ND ND ND ND ND ND ND ND ND ND ND Methyl tert-butyl Ether ND ND ND ND ND ND ND ND ND ND ND ND ND trans-1,2-dichloroethene 3.7 ND ND ND ND ND ND ND ND ND ND ND ND Hexane 4.2 ND ND ND ND ND ND ND ND ND ND ND ND 1,1-Dichloroethane 11 5 ND ND ND 3.7 ND ND ND 3.4 ND ND ND 2-Butanone (Methyl Ethyl Ketone) 9.5 ND ND 13 ND ND ND ND ND ND 11 18 ND cis-1,2-dichloroethene 29 17 6.4 6.4 5.8 13 3.2 3.5 5.3 10 5.2 5.9 4.9 Tetrahydrofuran ND ND ND ND ND ND ND ND ND ND ND ND ND Chloroform ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,1-Trichloroethane 190 150 52 43 33 120 29 26 27 95 34 33 24 Cyclohexane ND ND ND ND ND ND ND ND ND ND ND ND ND Carbon Tetrachloride ND ND ND ND ND ND ND ND ND ND ND ND ND 2,2,4-Trimethylpentane ND ND ND ND ND ND ND ND ND ND ND ND ND Benzene ND ND ND ND ND ND ND ND ND ND 3.3 ND ND 1,2-Dichloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Heptane ND ND ND ND ND ND ND ND ND ND ND ND ND Trichloroethene 720 340 190 140 140 210 95 73 100 130 88 96 65 1,2-Dichloropropane ND ND ND ND ND ND ND ND ND ND ND ND ND 1,4-Dioxane ND ND ND ND ND ND ND ND ND ND ND ND ND Bromodichloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND cis-1,3-dichloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND 4-Methyl-2-Pentanone ND ND ND ND ND ND ND ND ND ND ND ND ND Toluene 9 ND ND ND ND ND ND 4.4 ND ND 5.9 ND ND Integral Consulting Inc. Page 1 of 2

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 1. VOCs Measured ( TO-15) in the Till Manifold Cycle 1 Till Manifold Concentration (µg/m 3 ) Cycle 2 Cycle 3 Initial On 2 hr On 24 hr On 72 hr On 1 wk On 2 hr On 24 hr On 72 hr On 1 wk On 2 hr On 24 hr On 72 hr On 1 wk Off Off Off Analyte 12/13/2016 12/20/2016 12/21/2016 12/23/2016 12/27/2016 1/3/2017 1/4/2017 1/6/2017 1/10/2017 1/17/2017 1/18/2017 1/20/2017 1/24/2017 trans-1,3-dichloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,2-Trichloroethane 20 20 12 12 14 11 5.4 4.7 8 7.4 7.1 14 8.7 Tetrachloroethene 220 240 140 96 92 120 50 45 63 78 58 76 55 2-Hexanone ND ND ND ND ND ND ND ND ND ND ND ND ND Dibromochloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2-Dibromoethane (EDB) ND ND ND ND ND ND ND ND ND ND ND ND ND Chlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND Ethyl Benzene ND ND ND ND ND ND ND ND ND ND ND ND ND m,p-xylene ND ND ND ND ND ND ND ND ND ND 4.3 4.3 ND o-xylene ND ND ND ND ND ND ND ND ND ND ND ND ND Styrene ND ND ND ND ND ND ND ND ND ND ND ND ND Bromoform ND ND ND ND ND ND ND ND ND ND ND ND ND Cumene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,2,2-Tetrachloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Propylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 4-Ethyltoluene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3,5-Trimethylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2,4-Trimethylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,4-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND alpha-chlorotoluene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2,4-Trichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND Hexachlorobutadiene ND ND ND ND ND ND ND ND ND ND ND ND ND Chlorinated Organics (µg/m 3 ) 1,208 772 400 297 285 478 183 152 203 324 192 225 158 Non-chlorinated Organics (µg/m 3 ) 44 0 0 61 0 0 0 35 0 18 72 108 0 Total Organics (µg/m 3 ) 1,252 772 400 358 285 478 183 187 203 342 265 333 158 Notes: ND = analyte not detected VOC = volatile organic compound Integral Consulting Inc. Page 2 of 2

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 2. VOCs Measured ( TO-15) in the Alluvium Manifold Alluvium Manifold Concentration (µg/m 3 ) Cycle 1 Cycle 2 Cycle 3 Initial Off On 2 hr On 24 hr On 72 hr On 1 wk Off On 2 hr On 24 hr On 72 hr On 1 wk Off On 2 hr On 24 hr On 72 hr On 1 wk Analyte 12/14/2016 12/20/2016 12/21/2016 12/23/2016 12/27/2016 1/3/2017 1/4/2017 1/6/2017 1/10/2017 1/17/2017 1/18/2017 1/20/2017 1/24/2017 Freon 12 3.6 10 9.7 9 9.2 4.3 ND ND 4.6 ND ND ND 5.2 Freon 114 ND ND ND ND ND ND ND ND ND ND ND ND ND Chloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND Vinyl Chloride ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3-Butadiene ND ND ND ND ND ND ND ND ND ND ND ND ND Bromomethane ND ND ND ND ND ND ND ND ND ND ND ND ND Chloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Freon 11 ND ND ND ND ND ND ND ND ND ND ND ND ND Ethanol ND ND 6.1 ND ND ND ND ND ND ND ND 19 ND Freon 113 ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1-Dichloroethene ND ND ND ND ND ND ND ND ND ND ND ND ND Acetone ND ND ND ND ND ND ND ND ND ND ND 20 ND 2-Propanol ND ND 8.7 ND ND ND ND ND 10 ND ND 8.9 ND Carbon Disulfide ND ND ND ND ND ND ND ND ND ND ND ND ND 3-Chloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND Methylene Chloride ND ND ND ND ND ND ND ND ND ND ND ND ND Methyl tert-butyl Ether ND ND ND ND ND ND ND ND ND ND ND ND ND trans-1,2-dichloroethene ND ND ND ND ND ND ND ND ND ND ND ND ND Hexane ND ND ND ND ND ND ND ND ND ND ND ND 3.1 1,1-Dichloroethane ND 8.5 7.1 5.4 4.4 ND ND ND ND ND ND ND ND 2-Butanone (Methyl Ethyl Ketone) ND ND ND ND ND ND ND 15 ND ND ND 10 ND cis-1,2-dichloroethene 6.7 23 19 16 13 5.6 ND ND ND ND 5.1 ND 6.1 Tetrahydrofuran ND ND ND ND ND ND ND ND ND ND ND 2.3 ND Chloroform ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,1-Trichloroethane 33 180 150 100 66 33 ND 7.3 13 15 24 6.6 21 Cyclohexane ND ND 6.6 ND ND ND ND ND ND ND ND ND ND Carbon Tetrachloride ND ND ND ND ND ND ND ND ND ND ND ND ND 2,2,4-Trimethylpentane ND ND ND ND ND ND ND ND ND ND ND ND ND Benzene ND ND ND ND ND ND ND ND ND ND ND 3.8 ND 1,2-Dichloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Heptane ND ND ND ND ND ND ND ND ND ND ND ND ND Trichloroethene 170 730 620 460 400 170 34 42 80 70 140 37 130 1,2-Dichloropropane ND ND ND ND ND ND ND ND ND ND ND ND ND 1,4-Dioxane ND ND ND ND ND ND ND ND ND ND ND ND ND Bromodichloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND cis-1,3-dichloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND 4-Methyl-2-Pentanone ND ND ND ND ND ND ND ND ND ND ND ND ND Toluene ND ND ND ND ND ND ND ND ND ND ND ND ND Integral Consulting Inc. Page 1 of 2

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 2. VOCs Measured ( TO-15) in the Alluvium Manifold Cycle 1 Alluvium Manifold Concentration (µg/m 3 ) Cycle 2 Cycle 3 Initial On 2 hr On 24 hr On 72 hr On 1 wk On 2 hr On 24 hr On 72 hr On 1 wk On 2 hr On 24 hr On 72 hr On 1 wk Off Off Off Analyte 12/14/2016 12/20/2016 12/21/2016 12/23/2016 12/27/2016 1/3/2017 1/4/2017 1/6/2017 1/10/2017 1/17/2017 1/18/2017 1/20/2017 1/24/2017 trans-1,3-dichloropropene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,2-Trichloroethane 6.7 23 18 15 13 7.6 ND ND 5.5 ND 6.7 ND 4.5 Tetrachloroethene 70 310 240 190 160 88 30 32 46 45 77 26 62 2-Hexanone ND ND ND ND ND ND ND ND ND ND ND ND ND Dibromochloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2-Dibromoethane (EDB) ND ND ND ND ND ND ND ND ND ND ND ND ND Chlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND Ethyl Benzene ND ND ND ND ND ND ND ND ND ND ND ND ND m,p-xylene ND ND ND ND ND ND ND ND ND ND ND ND ND o-xylene ND ND ND ND ND ND ND ND ND ND ND ND ND Styrene ND ND ND ND ND ND ND ND ND ND ND ND ND Bromoform ND ND ND ND ND ND ND ND ND ND ND ND ND Cumene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,1,2,2-Tetrachloroethane ND ND ND ND ND ND ND ND ND ND ND ND ND Propylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 4-Ethyltoluene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3,5-Trimethylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2,4-Trimethylbenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,3-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,4-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND alpha-chlorotoluene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2-Dichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND 1,2,4-Trichlorobenzene ND ND ND ND ND ND ND ND ND ND ND ND ND Hexachlorobutadiene ND ND ND ND ND ND ND ND ND ND ND ND ND Chlorinated Organics (µg/m 3 ) 290 1,285 1,064 795 666 309 64 81 149 130 253 70 229 Non-chlorinated Organics (µg/m 3 ) 0 0 21 0 0 0 0 15 10 0 0 64 3 Total Organics (µg/m 3 ) 290 1,285 1,085 795 666 309 64 96 159 130 253 134 232 Notes: ND = analyte not detected VOC = volatile organic compound Integral Consulting Inc. Page 2 of 2

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 3. Summary of SVE Shutdown Evaluation Results Cycle and Sample Time Total VOCs (µg/m 3 ) Flow Rate (SCFM) Instantaneous Removal Rate (lb/hr) Mass Removed (lb) Time Interval (hr) Average Cycle Removal Rate (lb/hr) Till Alluvium Till Alluvium Till Alluvium Till Alluvium Till Alluvium Sample Date 12/13/2016, 12/14/2016 a Initial 1,252 290 120 467 0.00056 0.00051 - - - - - Cycle 1 - Off 1 wk - - - - 0 0 0 0 142.8 12/20/2016 Cycle 1 - On 2 hr 772 1,285 59 480 0.00017 0.00231 0.0004 0.0050 2.2 b b 12/21/2016 Cycle 1 - On 24 hr 400 1,085 0.00010 0.00191 0.0029 0.0463 21.9 b b 12/23/2016 Cycle 1 - On 72 hr 358 795 0.00009 0.00140 0.0044 0.0790 47.6 12/27/2016 Cycle 1 - On 1 wk 285 666 70 461 0.00007 0.00115 0.0079 0.1247 97.6 Cycle 1 - Sum 0.0155 0.2549 312.1 0.00005 0.00082 Cycle 2 - Off 1 wk - - - - 0 0 0 0 165.0 1/3/2017 Cycle 2 - On 2 hr 478 309 75 430 0.00013 0.00050 0.0003 0.0010 2.0 1/4/2017 Cycle 2 - On 24 hr 183 64 b b 0.00005 0.00010 0.0022 0.0072 24.0 1/6/2017 Cycle 2 - On 72 hr 187 96 b b 0.00005 0.00016 0.0025 0.0063 48.0 1/10/2017 Cycle 2 - On 1 wk 203 159 78 441 0.00006 0.00026 0.0053 0.0197 93.8 Cycle 2 - Sum 0.0104 0.0342 332.8 0.00003 0.00010 Cycle 3 - Off 1 wk - - - - 0 0 0 0 168.4 1/17/2017 Cycle 3 - On 2 hr 342 130 90 431 0.00012 0.00021 0.0002 0.0004 2.0 1/18/2017 Cycle 3 - On 24 hr 265 253 b b 0.00008 0.00043 0.0023 0.0075 23.3 1/20/2017 Cycle 3 - On 72 hr 333 134 b b 0.00010 0.00023 0.0042 0.0149 45.5 1/24/2017 Cycle 3 - On 1 wk 158 232 74 475 0.00004 0.00041 0.0070 0.0304 95.0 Cycle 3 - Sum 0.0137 0.0532 334.2 0.00004 0.00016 Shutdown Test Average Removal Rate 0.00004 0.00036 Asymptotic Average Removal Rate 0.00094 0.00420 Notes: SCFM = standard cubic feet per minute SVE = soil vapor extraction VOC = volatile organic compound -- = not available Nondetected values were not included in the total VOCs sum. a Due to receipt of a sample canister without vacuum, the till sample was collected on 12/13/2016 and the alluvium sample was collected on 12/14/2016. The first rebound cycle was begun on 12/14/2016 and is therefore 6 days in length. b Flow rates were not recorded for 24-hr and 72-hr samples. An average of the 2-hr and 1-wk cycle samples was used to calculate mass removal rates. Integral Consulting Inc. Page 1 of 1

SVE Shutdown Evaluation Report Former Ashland Lease Area June 19, 2017 Table 4. Concentrations of Trichloroethene (TCE) in Shallow Monitoring Point T-VM-4S Sampling Location Sampling Date TCE Concentration (µg/m 3 ) System Operating Status Alluvium SVE Till SVE 7/16/2013 ND On On 9/24/2013 5.3 Off On T-VM-4S 12/18/2013 ND Off On 3/31/2014 ND Off On Notes: ND = non-detect SVE = soil vapor extraction 6/23/2014 ND Off On 9/9/2014 5.2 Off On 12/6/2016 96 Off On Integral Consulting Inc. Page 1 of 1

APPENDIX A ANALYTICAL DATA REPORTS

12/28/2016 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612233 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/13/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 14

WORK ORDER #: 1612233 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/13/2016 DATE COMPLETED: 12/28/2016 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501693 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A T-VM-4S TO-15 15.5 "Hg 5 psi 02A Lab Blank TO-15 NA NA 03A CCV TO-15 NA NA 04A LCS TO-15 NA NA 04AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 12/28/16 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 14

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612233 One 6 Liter Summa Canister (100% Certified) sample was received on December 13, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes Sample T-VM-4S was received with significant vacuum remaining in the canister. The residual canister vacuum resulted in elevated reporting limits. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 14

Summary of Detected s Client Sample ID: T-VM-4S Lab ID#: 1612233-01A Tetrahydrofuran 1,1,1-Trichloroethane Trichloroethene Tetrachloroethene 1.4 4.4 4.1 13 1.4 16 7.6 88 1.4 18 7.4 96 1.4 1.5 9.4 10 Page 4 of 14

File Name: p122110 Dil. Factor: 2.77 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: T-VM-4S Lab ID#: 1612233-01A Date of Collection: 12/6/16 9:47:00 AM Date of Analysis: 12/21/16 06:01 PM 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 9.7 Not Detected 14 Not Detected 29 Not Detected 1.4 Not Detected 3.5 Not Detected 1.4 Not Detected 3.1 Not Detected 14 Not Detected 54 Not Detected 5.5 Not Detected 15 Not Detected 1.4 Not Detected 7.8 Not Detected 5.5 Not Detected 10 Not Detected 1.4 Not Detected 11 Not Detected 1.4 Not Detected 5.5 Not Detected 14 Not Detected 33 Not Detected 5.5 Not Detected 14 Not Detected 5.5 Not Detected 17 Not Detected 5.5 Not Detected 17 Not Detected 14 Not Detected 48 Not Detected 5.5 Not Detected 20 Not Detected 1.4 Not Detected 5.5 Not Detected 1.4 Not Detected 4.9 Not Detected 1.4 Not Detected 5.6 Not Detected 5.5 Not Detected 16 Not Detected 1.4 Not Detected 5.5 Not Detected 1.4 4.4 4.1 13 1.4 Not Detected 6.8 Not Detected 1.4 16 7.6 88 1.4 Not Detected 4.8 Not Detected 1.4 Not Detected 8.7 Not Detected 1.4 Not Detected 6.5 Not Detected 1.4 Not Detected 4.4 Not Detected 1.4 Not Detected 5.6 Not Detected 1.4 Not Detected 5.7 Not Detected 1.4 18 7.4 96 1.4 Not Detected 6.4 Not Detected 5.5 Not Detected 20 Not Detected 1.4 Not Detected 9.3 Not Detected 1.4 Not Detected 6.3 Not Detected 1.4 Not Detected 5.7 Not Detected 1.4 Not Detected 5.2 Not Detected 1.4 Not Detected 6.3 Not Detected 1.4 Not Detected 7.6 Not Detected 1.4 1.5 9.4 10 5.5 Not Detected 23 Not Detected Page 5 of 14

File Name: p122110 Dil. Factor: 2.77 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: T-VM-4S Lab ID#: 1612233-01A Date of Collection: 12/6/16 9:47:00 AM Date of Analysis: 12/21/16 06:01 PM 1.4 Not Detected 12 Not Detected 1.4 Not Detected 11 Not Detected 1.4 Not Detected 6.4 Not Detected 1.4 Not Detected 6.0 Not Detected 1.4 Not Detected 6.0 Not Detected 1.4 Not Detected 6.0 Not Detected 1.4 Not Detected 5.9 Not Detected 1.4 Not Detected 14 Not Detected 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 9.5 Not Detected 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 6.8 Not Detected 1.4 Not Detected 8.3 Not Detected 1.4 Not Detected 8.3 Not Detected 1.4 Not Detected 7.2 Not Detected 1.4 Not Detected 8.3 Not Detected 5.5 Not Detected 41 Not Detected 5.5 Not Detected 59 Not Detected Container Type: 6 Liter Summa Canister (100% Certified) Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 96 70-130 96 70-130 Page 6 of 14

File Name: p122106 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612233-02A Date of Collection: NA Date of Analysis: 12/21/16 01:22 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 7 of 14

File Name: p122106 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612233-02A Date of Collection: NA Date of Analysis: 12/21/16 01:22 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 95 70-130 98 70-130 Page 8 of 14

Client Sample ID: CCV Lab ID#: 1612233-03A File Name: p122102 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 104 104 102 117 125 113 102 101 102 101 108 104 103 100 104 102 102 109 112 103 104 109 109 105 103 111 109 111 101 99 108 103 100 104 102 106 108 102 106 103 103 109 Date of Collection: NA Date of Analysis: 12/21/16 11:15 AM Page 9 of 14

Client Sample ID: CCV Lab ID#: 1612233-03A File Name: p122102 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 103 104 102 112 113 115 115 104 111 102 107 113 109 113 106 105 108 104 98 94 Date of Collection: NA Date of Analysis: 12/21/16 11:15 AM 101 70-130 99 70-130 102 70-130 Page 10 of 14

Client Sample ID: LCS Lab ID#: 1612233-04A File Name: p122103 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/21/16 11:40 AM 105 70-130 105 70-130 102 70-130 120 70-130 123 70-130 112 70-130 100 70-130 88 70-130 98 70-130 106 70-130 103 70-130 105 70-130 101 70-130 107 70-130 101 70-130 103 70-130 118 70-130 115 70-130 103 70-130 103 70-130 100 70-130 112 70-130 101 70-130 111 70-130 106 70-130 110 70-130 100 70-130 97 70-130 110 70-130 105 70-130 101 70-130 106 70-130 114 70-130 108 70-130 101 70-130 107 70-130 106 70-130 103 70-130 114 70-130 Page 11 of 14

Client Sample ID: LCS Lab ID#: 1612233-04A File Name: p122103 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/21/16 11:40 AM 105 70-130 105 70-130 103 70-130 112 70-130 114 70-130 115 70-130 119 70-130 107 70-130 111 70-130 101 70-130 107 70-130 115 70-130 110 70-130 115 70-130 107 70-130 111 70-130 103 70-130 99 70-130 98 70-130 101 70-130 96 70-130 102 70-130 Page 12 of 14

Client Sample ID: LCSD Lab ID#: 1612233-04AA File Name: p122104 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/21/16 12:04 PM 105 70-130 102 70-130 119 70-130 124 70-130 114 70-130 100 70-130 88 70-130 98 70-130 108 70-130 102 70-130 105 70-130 101 70-130 109 70-130 101 70-130 101 70-130 117 70-130 113 70-130 103 70-130 108 70-130 101 70-130 112 70-130 101 70-130 112 70-130 106 70-130 111 70-130 101 70-130 98 70-130 110 70-130 105 70-130 102 70-130 106 70-130 115 70-130 112 70-130 102 70-130 105 70-130 106 70-130 103 70-130 114 70-130 Page 13 of 14

Client Sample ID: LCSD Lab ID#: 1612233-04AA File Name: p122104 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/21/16 12:04 PM 113 70-130 115 70-130 114 70-130 118 70-130 106 70-130 110 70-130 101 70-130 107 70-130 109 70-130 116 70-130 115 70-130 106 70-130 112 70-130 105 70-130 100 70-130 95 70-130 100 70-130 Page 14 of 14

1/4/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612306A Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/19/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 24

WORK ORDER #: 1612306A Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/19/2016 DATE COMPLETED: 01/04/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743/43500/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 4.0 "Hg 5 psi 02A Alluvium TO-15 1.0 "Hg 5 psi 03A Lab Blank TO-15 NA NA 03B Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 04B CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA 05B LCS TO-15 NA NA 05BB LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/04/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 24

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612306A Two 6 Liter Summa Canister samples were received on December 19, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There was a significant difference (greater than 5.0" Hg) between the measured canister receipt vacuum and that which was reported on the Chain of Custody (COC) for sample Alluvium. A leak test indicated that the valve was functioning properly. Analytical Notes All Quality Control Limit exceedances and affected sample results are noted by flags. Each flag is defined at the bottom of this Case Narrative and on each Sample Result Summary page. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 24

Summary of Detected s Client Sample ID: Till Lab ID#: 1612306A-01A Freon 12 Acetone trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene Toluene 1,1,2-Trichloroethane Tetrachloroethene 0.78 2.9 3.8 14 7.8 9.3 18 22 0.78 0.93 3.1 3.7 0.78 1.2 2.7 4.2 0.78 2.7 3.1 11 3.1 3.2 9.1 9.5 0.78 7.3 3.1 29 0.78 35 4.2 190 0.78 130 4.2 720 0.78 2.2 2.9 8.5 0.78 3.8 4.2 20 0.78 32 5.2 220 Client Sample ID: Alluvium Lab ID#: 1612306A-02A Freon 12 cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.70 0.72 3.4 3.6 0.70 1.7 2.8 6.7 0.70 6.1 3.8 33 0.70 31 3.7 170 0.70 1.2 3.8 6.7 0.70 10 4.7 70 Page 4 of 24

File Name: 17122807 Dil. Factor: 1.55 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1612306A-01A Date of Collection: 12/13/16 1:34:00 PM Date of Analysis: 12/28/16 04:30 PM 0.78 2.9 3.8 14 0.78 Not Detected 5.4 Not Detected 7.8 Not Detected 16 Not Detected 0.78 Not Detected 2.0 Not Detected 0.78 Not Detected 1.7 Not Detected 7.8 Not Detected 30 Not Detected 3.1 Not Detected 8.2 Not Detected 0.78 Not Detected 4.4 Not Detected 3.1 Not Detected 5.8 Not Detected 0.78 Not Detected 5.9 Not Detected 0.78 Not Detected 3.1 Not Detected 7.8 9.3 18 22 3.1 Not Detected 7.6 Not Detected 3.1 Not Detected 9.6 Not Detected 3.1 Not Detected 9.7 Not Detected 7.8 Not Detected 27 Not Detected 3.1 Not Detected 11 Not Detected 0.78 0.93 3.1 3.7 0.78 1.2 2.7 4.2 0.78 2.7 3.1 11 3.1 3.2 9.1 9.5 0.78 7.3 3.1 29 0.78 Not Detected 2.3 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 35 4.2 190 0.78 Not Detected 2.7 Not Detected 0.78 Not Detected 4.9 Not Detected 0.78 Not Detected 3.6 Not Detected 0.78 Not Detected 2.5 Not Detected 0.78 Not Detected 3.1 Not Detected 0.78 Not Detected 3.2 Not Detected 0.78 130 4.2 720 0.78 Not Detected 3.6 Not Detected 3.1 Not Detected 11 Not Detected 0.78 Not Detected 5.2 Not Detected 0.78 Not Detected 3.5 Not Detected 0.78 Not Detected 3.2 Not Detected 0.78 2.2 2.9 8.5 0.78 Not Detected 3.5 Not Detected 0.78 3.8 4.2 20 0.78 32 5.2 220 3.1 Not Detected 13 Not Detected Page 5 of 24

File Name: 17122807 Dil. Factor: 1.55 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1612306A-01A Date of Collection: 12/13/16 1:34:00 PM Date of Analysis: 12/28/16 04:30 PM 0.78 Not Detected 6.6 Not Detected 0.78 Not Detected 6.0 Not Detected 0.78 Not Detected 3.6 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.3 Not Detected 0.78 Not Detected 8.0 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 5.3 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 4.6 Not Detected 0.78 Not Detected 4.6 Not Detected 0.78 Not Detected 4.0 Not Detected 0.78 Not Detected 4.6 Not Detected 3.1 Not Detected 23 Not Detected 3.1 Not Detected 33 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 111 70-130 110 70-130 89 70-130 Page 6 of 24

File Name: a122221 Dil. Factor: 1.39 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1612306A-02A Date of Collection: 12/14/16 11:36:00 A Date of Analysis: 12/22/16 11:29 PM 0.70 0.72 3.4 3.6 0.70 Not Detected 4.8 Not Detected 7.0 Not Detected 14 Not Detected 0.70 Not Detected 1.8 Not Detected 0.70 Not Detected 1.5 Not Detected 7.0 Not Detected 27 Not Detected 2.8 Not Detected 7.3 Not Detected 0.70 Not Detected 3.9 Not Detected 2.8 Not Detected 5.2 Not Detected 0.70 Not Detected 5.3 Not Detected 0.70 Not Detected 2.8 Not Detected 7.0 Not Detected 16 Not Detected 2.8 Not Detected 6.8 Not Detected 2.8 Not Detected 8.6 Not Detected 2.8 Not Detected 8.7 Not Detected 7.0 Not Detected 24 Not Detected 2.8 Not Detected 10 Not Detected 0.70 Not Detected 2.8 Not Detected 0.70 Not Detected 2.4 Not Detected 0.70 Not Detected 2.8 Not Detected 2.8 Not Detected 8.2 Not Detected 0.70 1.7 2.8 6.7 0.70 Not Detected 2.0 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 6.1 3.8 33 0.70 Not Detected 2.4 Not Detected 0.70 Not Detected 4.4 Not Detected 0.70 Not Detected 3.2 Not Detected 0.70 Not Detected 2.2 Not Detected 0.70 Not Detected 2.8 Not Detected 0.70 Not Detected 2.8 Not Detected 0.70 31 3.7 170 0.70 Not Detected 3.2 Not Detected 2.8 Not Detected 10 Not Detected 0.70 Not Detected 4.6 Not Detected 0.70 Not Detected 3.2 Not Detected 0.70 Not Detected 2.8 Not Detected 0.70 Not Detected 2.6 Not Detected 0.70 Not Detected 3.2 Not Detected 0.70 1.2 3.8 6.7 0.70 10 4.7 70 2.8 Not Detected 11 Not Detected Page 7 of 24

File Name: a122221 Dil. Factor: 1.39 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1612306A-02A Date of Collection: 12/14/16 11:36:00 A Date of Analysis: 12/22/16 11:29 PM 0.70 Not Detected 5.9 Not Detected 0.70 Not Detected 5.3 Not Detected 0.70 Not Detected 3.2 Not Detected 0.70 Not Detected 3.0 Not Detected 0.70 Not Detected 3.0 Not Detected 0.70 Not Detected 3.0 Not Detected 0.70 Not Detected 3.0 Not Detected 0.70 Not Detected 7.2 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 Not Detected 4.8 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 Not Detected 3.4 Not Detected 0.70 Not Detected 4.2 Not Detected 0.70 Not Detected 4.2 Not Detected 0.70 Not Detected 3.6 Not Detected 0.70 Not Detected 4.2 Not Detected 2.8 Not Detected 21 Not Detected 2.8 Not Detected 30 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 103 70-130 100 70-130 108 70-130 Page 8 of 24

File Name: a122207 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612306A-03A Date of Collection: NA Date of Analysis: 12/22/16 02:31 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 24

File Name: a122207 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612306A-03A Date of Collection: NA Date of Analysis: 12/22/16 02:31 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 105 70-130 106 70-130 Page 10 of 24

File Name: 17122806 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612306A-03B Date of Collection: NA Date of Analysis: 12/28/16 01:36 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 11 of 24

File Name: 17122806 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612306A-03B Date of Collection: NA Date of Analysis: 12/28/16 01:36 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 106 70-130 90 70-130 Page 12 of 24

Client Sample ID: CCV Lab ID#: 1612306A-04A File Name: a122203 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 94 93 87 78 79 82 80 98 77 90 88 77 79 79 79 83 88 79 83 84 82 93 81 93 93 85 101 94 80 92 85 89 84 86 94 85 88 94 82 79 83 82 Date of Collection: NA Date of Analysis: 12/22/16 10:07 AM Page 13 of 24

Client Sample ID: CCV Lab ID#: 1612306A-04A File Name: a122203 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 90 82 84 92 84 94 93 93 89 84 89 90 95 96 92 96 98 96 124 122 Date of Collection: NA Date of Analysis: 12/22/16 10:07 AM 103 70-130 103 70-130 109 70-130 Page 14 of 24

Client Sample ID: CCV Lab ID#: 1612306A-04B File Name: 17122802 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 104 96 84 107 106 100 108 98 107 90 101 96 105 104 102 109 101 99 108 110 104 105 108 104 98 99 92 108 108 110 115 104 112 100 106 106 103 104 102 96 84 100 Date of Collection: NA Date of Analysis: 12/28/16 09:16 AM Page 15 of 24

Client Sample ID: CCV Lab ID#: 1612306A-04B File Name: 17122802 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 92 95 95 96 106 107 113 94 107 114 111 100 104 95 97 99 126 105 87 83 Date of Collection: NA Date of Analysis: 12/28/16 09:16 AM 108 70-130 109 70-130 102 70-130 Page 16 of 24

Client Sample ID: LCS Lab ID#: 1612306A-05A File Name: a122204 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/22/16 10:32 AM 90 70-130 89 70-130 83 70-130 76 70-130 73 70-130 71 70-130 75 70-130 92 70-130 64 Q 70-130 87 70-130 85 70-130 75 70-130 77 70-130 76 70-130 78 70-130 78 70-130 84 70-130 80 70-130 79 70-130 80 70-130 82 70-130 84 70-130 79 70-130 88 70-130 93 70-130 84 70-130 96 70-130 89 70-130 79 70-130 87 70-130 84 70-130 86 70-130 82 70-130 88 70-130 92 70-130 87 70-130 88 70-130 91 70-130 80 70-130 78 70-130 83 70-130 85 70-130 Page 17 of 24

Client Sample ID: LCS Lab ID#: 1612306A-05A File Name: a122204 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/22/16 10:32 AM 88 70-130 80 70-130 84 70-130 92 70-130 84 70-130 92 70-130 92 70-130 93 70-130 90 70-130 85 70-130 88 70-130 92 70-130 95 70-130 96 70-130 92 70-130 96 70-130 100 70-130 96 70-130 123 70-130 121 70-130 101 70-130 100 70-130 108 70-130 Page 18 of 24

Client Sample ID: LCSD Lab ID#: 1612306A-05AA File Name: a122205 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/22/16 10:57 AM 92 70-130 91 70-130 89 70-130 80 70-130 74 70-130 83 70-130 78 70-130 96 70-130 68 Q 70-130 87 70-130 84 70-130 80 70-130 78 70-130 78 70-130 80 70-130 78 70-130 86 70-130 86 70-130 83 70-130 81 70-130 86 70-130 84 70-130 80 70-130 90 70-130 95 70-130 84 70-130 100 70-130 92 70-130 79 70-130 87 70-130 87 70-130 87 70-130 81 70-130 90 70-130 91 70-130 86 70-130 89 70-130 92 70-130 80 70-130 76 70-130 81 70-130 85 70-130 Page 19 of 24

Client Sample ID: LCSD Lab ID#: 1612306A-05AA File Name: a122205 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/22/16 10:57 AM 87 70-130 78 70-130 82 70-130 90 70-130 81 70-130 91 70-130 89 70-130 92 70-130 87 70-130 83 70-130 87 70-130 91 70-130 92 70-130 94 70-130 89 70-130 94 70-130 98 70-130 93 70-130 121 70-130 120 70-130 101 70-130 107 70-130 Page 20 of 24

Client Sample ID: LCS Lab ID#: 1612306A-05B File Name: 17122803 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/28/16 09:45 AM 108 70-130 100 70-130 140 Q 70-130 115 70-130 114 70-130 110 70-130 117 70-130 103 70-130 98 70-130 91 70-130 102 70-130 103 70-130 111 70-130 109 70-130 112 70-130 110 70-130 101 70-130 110 70-130 113 70-130 110 70-130 109 70-130 97 70-130 114 70-130 106 70-130 99 70-130 101 70-130 95 70-130 108 70-130 107 70-130 110 70-130 107 70-130 115 70-130 102 70-130 110 70-130 114 70-130 107 70-130 105 70-130 109 70-130 101 70-130 88 70-130 110 70-130 Page 21 of 24

Client Sample ID: LCS Lab ID#: 1612306A-05B File Name: 17122803 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/28/16 09:45 AM 98 70-130 100 70-130 94 70-130 98 70-130 98 70-130 98 70-130 110 70-130 92 70-130 97 70-130 101 70-130 97 70-130 96 70-130 93 70-130 89 70-130 91 70-130 107 70-130 88 70-130 96 70-130 90 70-130 107 70-130 110 70-130 94 70-130 Page 22 of 24

Client Sample ID: LCSD Lab ID#: 1612306A-05BB File Name: 17122804 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 12/28/16 10:13 AM 113 70-130 106 70-130 143 Q 70-130 117 70-130 114 70-130 115 70-130 121 70-130 106 70-130 103 70-130 92 70-130 117 70-130 115 70-130 112 70-130 112 70-130 105 70-130 114 70-130 118 70-130 111 70-130 110 70-130 99 70-130 115 70-130 106 70-130 102 70-130 101 70-130 110 70-130 107 70-130 111 70-130 109 70-130 108 70-130 111 70-130 103 70-130 109 70-130 113 70-130 108 70-130 105 70-130 108 70-130 101 70-130 88 70-130 114 70-130 Page 23 of 24

Client Sample ID: LCSD Lab ID#: 1612306A-05BB File Name: 17122804 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 12/28/16 10:13 AM 98 70-130 99 70-130 94 70-130 97 70-130 97 70-130 103 70-130 114 70-130 106 70-130 110 70-130 116 70-130 112 70-130 109 70-130 105 70-130 107 70-130 102 70-130 100 70-130 124 70-130 102 70-130 97 70-130 91 70-130 107 70-130 111 70-130 106 70-130 Page 24 of 24

1/4/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612425 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/23/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1612425 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/23/2016 DATE COMPLETED: 01/04/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743/43500/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 4.9 "Hg 4.8 psi 02A Alluvium TO-15 4.7 "Hg 5 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/04/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612425 Two 6 Liter Summa Canister samples were received on December 23, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1612425-01A 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.79 1.2 3.2 5.0 0.79 4.3 3.1 17 0.79 28 4.3 150 0.79 63 4.2 340 0.79 3.7 4.3 20 0.79 35 5.4 240 Client Sample ID: Alluvium Lab ID#: 1612425-02A Freon 12 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.80 2.1 3.9 10 0.80 2.1 3.2 8.5 0.80 5.7 3.2 23 0.80 33 4.3 180 0.80 140 4.3 730 0.80 4.2 4.3 23 0.80 46 5.4 310 Page 4 of 16

File Name: p010311 Dil. Factor: 1.58 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1612425-01A Date of Collection: 12/20/16 12:35:00 P Date of Analysis: 1/3/17 03:25 PM 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.5 Not Detected 7.9 Not Detected 16 Not Detected 0.79 Not Detected 2.0 Not Detected 0.79 Not Detected 1.7 Not Detected 7.9 Not Detected 31 Not Detected 3.2 Not Detected 8.3 Not Detected 0.79 Not Detected 4.4 Not Detected 3.2 Not Detected 6.0 Not Detected 0.79 Not Detected 6.0 Not Detected 0.79 Not Detected 3.1 Not Detected 7.9 Not Detected 19 Not Detected 3.2 Not Detected 7.8 Not Detected 3.2 Not Detected 9.8 Not Detected 3.2 Not Detected 9.9 Not Detected 7.9 Not Detected 27 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 3.1 Not Detected 0.79 Not Detected 2.8 Not Detected 0.79 1.2 3.2 5.0 3.2 Not Detected 9.3 Not Detected 0.79 4.3 3.1 17 0.79 Not Detected 2.3 Not Detected 0.79 Not Detected 3.8 Not Detected 0.79 28 4.3 150 0.79 Not Detected 2.7 Not Detected 0.79 Not Detected 5.0 Not Detected 0.79 Not Detected 3.7 Not Detected 0.79 Not Detected 2.5 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 63 4.2 340 0.79 Not Detected 3.6 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 5.3 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.0 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 3.7 4.3 20 0.79 35 5.4 240 3.2 Not Detected 13 Not Detected Page 5 of 16

File Name: p010311 Dil. Factor: 1.58 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1612425-01A Date of Collection: 12/20/16 12:35:00 P Date of Analysis: 1/3/17 03:25 PM 0.79 Not Detected 6.7 Not Detected 0.79 Not Detected 6.1 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 8.2 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.4 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.1 Not Detected 0.79 Not Detected 4.7 Not Detected 3.2 Not Detected 23 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 97 70-130 99 70-130 Page 6 of 16

File Name: p010312 Dil. Factor: 1.59 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1612425-02A Date of Collection: 12/20/16 12:39:00 P Date of Analysis: 1/3/17 03:51 PM 0.80 2.1 3.9 10 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 16 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.4 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.0 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.8 Not Detected 3.2 Not Detected 9.9 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 11 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 2.1 3.2 8.5 3.2 Not Detected 9.4 Not Detected 0.80 5.7 3.2 23 0.80 Not Detected 2.3 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 33 4.3 180 0.80 Not Detected 2.7 Not Detected 0.80 Not Detected 5.0 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 2.5 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 140 4.3 730 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 11 Not Detected 0.80 Not Detected 5.3 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 4.2 4.3 23 0.80 46 5.4 310 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: p010312 Dil. Factor: 1.59 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1612425-02A Date of Collection: 12/20/16 12:39:00 P Date of Analysis: 1/3/17 03:51 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.2 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.1 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 95 70-130 96 70-130 Page 8 of 16

File Name: p010306 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612425-03A Date of Collection: NA Date of Analysis: 1/3/17 12:10 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: p010306 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612425-03A Date of Collection: NA Date of Analysis: 1/3/17 12:10 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 96 70-130 96 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1612425-04A File Name: p010302 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 106 104 107 117 124 101 103 100 98 101 102 106 98 100 99 103 95 108 109 105 101 107 109 107 101 107 101 106 107 104 109 109 106 106 108 108 112 108 106 108 107 109 Date of Collection: NA Date of Analysis: 1/3/17 09:41 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1612425-04A File Name: p010302 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 107 108 106 114 117 115 117 108 113 107 108 109 114 112 108 108 110 108 103 103 Date of Collection: NA Date of Analysis: 1/3/17 09:41 AM 95 70-130 103 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1612425-05A File Name: p010303 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/3/17 10:05 AM 106 70-130 102 70-130 120 70-130 122 70-130 108 70-130 107 70-130 101 70-130 83 70-130 98 70-130 102 70-130 102 70-130 101 70-130 105 70-130 103 70-130 96 70-130 117 70-130 111 70-130 97 70-130 111 70-130 106 70-130 100 70-130 108 70-130 107 70-130 105 70-130 101 70-130 110 70-130 107 70-130 107 70-130 107 70-130 114 70-130 110 70-130 106 70-130 109 70-130 105 70-130 113 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1612425-05A File Name: p010303 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/3/17 10:05 AM 107 70-130 107 70-130 105 70-130 113 70-130 114 70-130 114 70-130 121 70-130 109 70-130 110 70-130 107 70-130 110 70-130 116 70-130 113 70-130 106 70-130 108 70-130 110 70-130 105 70-130 95 70-130 103 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1612425-05AA File Name: p010304 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/3/17 10:30 AM 108 70-130 110 70-130 105 70-130 120 70-130 128 70-130 114 70-130 109 70-130 102 70-130 86 70-130 101 70-130 106 70-130 107 70-130 105 70-130 110 70-130 99 70-130 119 70-130 114 70-130 107 70-130 109 70-130 101 70-130 114 70-130 108 70-130 102 70-130 110 70-130 108 70-130 110 70-130 105 70-130 99 70-130 110 70-130 107 70-130 106 70-130 108 70-130 115 70-130 112 70-130 105 70-130 108 70-130 105 70-130 113 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1612425-05AA File Name: p010304 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/3/17 10:30 AM 107 70-130 107 70-130 105 70-130 113 70-130 115 70-130 114 70-130 120 70-130 108 70-130 111 70-130 107 70-130 110 70-130 115 70-130 114 70-130 106 70-130 108 70-130 110 70-130 105 70-130 105 70-130 107 70-130 97 70-130 103 70-130 Page 16 of 16

1/10/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612424 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/23/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1612424 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/23/2016 DATE COMPLETED: 01/10/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743/43500/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 5.5 "Hg 4.8 psi 02A Alluvium TO-15 5.1 "Hg 5 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/10/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612424 Two 6 Liter Summa Canister samples were received on December 23, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1612424-01A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.81 1.6 3.2 6.4 0.81 9.6 4.4 52 0.81 36 4.4 190 0.81 2.2 4.4 12 0.81 20 5.5 140 Client Sample ID: Alluvium Lab ID#: 1612424-02A Freon 12 Ethanol 2-Propanol 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Cyclohexane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.80 2.0 4.0 9.7 3.2 3.2 6.1 6.1 3.2 3.6 7.9 8.7 0.80 1.7 3.2 7.1 0.80 4.8 3.2 19 0.80 27 4.4 150 0.80 1.9 2.8 6.6 0.80 110 4.3 620 0.80 3.2 4.4 18 0.80 35 5.5 240 Page 4 of 16

File Name: p010323 Dil. Factor: 1.62 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1612424-01A Date of Collection: 12/21/16 10:32:00 A Date of Analysis: 1/3/17 10:13 PM 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 5.7 Not Detected 8.1 Not Detected 17 Not Detected 0.81 Not Detected 2.1 Not Detected 0.81 Not Detected 1.8 Not Detected 8.1 Not Detected 31 Not Detected 3.2 Not Detected 8.5 Not Detected 0.81 Not Detected 4.6 Not Detected 3.2 Not Detected 6.1 Not Detected 0.81 Not Detected 6.2 Not Detected 0.81 Not Detected 3.2 Not Detected 8.1 Not Detected 19 Not Detected 3.2 Not Detected 8.0 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.1 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.81 Not Detected 3.2 Not Detected 0.81 Not Detected 2.8 Not Detected 0.81 Not Detected 3.3 Not Detected 3.2 Not Detected 9.6 Not Detected 0.81 1.6 3.2 6.4 0.81 Not Detected 2.4 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 9.6 4.4 52 0.81 Not Detected 2.8 Not Detected 0.81 Not Detected 5.1 Not Detected 0.81 Not Detected 3.8 Not Detected 0.81 Not Detected 2.6 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 36 4.4 190 0.81 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.81 Not Detected 5.4 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 Not Detected 3.0 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 2.2 4.4 12 0.81 20 5.5 140 3.2 Not Detected 13 Not Detected Page 5 of 16

File Name: p010323 Dil. Factor: 1.62 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1612424-01A Date of Collection: 12/21/16 10:32:00 A Date of Analysis: 1/3/17 10:13 PM 0.81 Not Detected 6.9 Not Detected 0.81 Not Detected 6.2 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.4 Not Detected 0.81 Not Detected 8.4 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 5.6 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.9 Not Detected 0.81 Not Detected 4.9 Not Detected 0.81 Not Detected 4.2 Not Detected 0.81 Not Detected 4.9 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 95 70-130 96 70-130 Page 6 of 16

File Name: p010324 Dil. Factor: 1.61 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1612424-02A Date of Collection: 12/21/16 10:38:00 A Date of Analysis: 1/3/17 10:39 PM 0.80 2.0 4.0 9.7 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 17 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.5 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 3.2 6.1 6.1 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 3.6 7.9 8.7 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 1.7 3.2 7.1 3.2 Not Detected 9.5 Not Detected 0.80 4.8 3.2 19 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 27 4.4 150 0.80 1.9 2.8 6.6 0.80 Not Detected 5.1 Not Detected 0.80 Not Detected 3.8 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 110 4.3 620 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 3.2 4.4 18 0.80 35 5.5 240 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: p010324 Dil. Factor: 1.61 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1612424-02A Date of Collection: 12/21/16 10:38:00 A Date of Analysis: 1/3/17 10:39 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.2 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 106 70-130 93 70-130 95 70-130 Page 8 of 16

File Name: p010306 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612424-03A Date of Collection: NA Date of Analysis: 1/3/17 12:10 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: p010306 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612424-03A Date of Collection: NA Date of Analysis: 1/3/17 12:10 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 96 70-130 96 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1612424-04A File Name: p010302 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 106 104 107 117 124 101 103 100 98 101 102 106 98 100 99 103 95 108 109 105 101 107 109 107 101 107 101 106 107 104 109 109 106 106 108 108 112 108 106 108 107 109 Date of Collection: NA Date of Analysis: 1/3/17 09:41 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1612424-04A File Name: p010302 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 107 108 106 114 117 115 117 108 113 107 108 109 114 112 108 108 110 108 103 103 Date of Collection: NA Date of Analysis: 1/3/17 09:41 AM 95 70-130 103 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1612424-05A File Name: p010303 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/3/17 10:05 AM 106 70-130 102 70-130 120 70-130 122 70-130 108 70-130 107 70-130 101 70-130 83 70-130 98 70-130 102 70-130 102 70-130 101 70-130 105 70-130 103 70-130 96 70-130 117 70-130 111 70-130 97 70-130 111 70-130 106 70-130 100 70-130 108 70-130 107 70-130 105 70-130 101 70-130 110 70-130 107 70-130 107 70-130 107 70-130 114 70-130 110 70-130 106 70-130 109 70-130 105 70-130 113 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1612424-05A File Name: p010303 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/3/17 10:05 AM 107 70-130 107 70-130 105 70-130 113 70-130 114 70-130 114 70-130 121 70-130 109 70-130 110 70-130 107 70-130 110 70-130 116 70-130 113 70-130 106 70-130 108 70-130 110 70-130 105 70-130 95 70-130 103 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1612424-05AA File Name: p010304 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/3/17 10:30 AM 108 70-130 110 70-130 105 70-130 120 70-130 128 70-130 114 70-130 109 70-130 102 70-130 86 70-130 101 70-130 106 70-130 107 70-130 105 70-130 110 70-130 99 70-130 119 70-130 114 70-130 107 70-130 109 70-130 101 70-130 114 70-130 108 70-130 102 70-130 110 70-130 108 70-130 110 70-130 105 70-130 99 70-130 110 70-130 107 70-130 106 70-130 108 70-130 115 70-130 112 70-130 105 70-130 108 70-130 105 70-130 113 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1612424-05AA File Name: p010304 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/3/17 10:30 AM 107 70-130 107 70-130 105 70-130 113 70-130 115 70-130 114 70-130 120 70-130 108 70-130 111 70-130 107 70-130 110 70-130 115 70-130 114 70-130 106 70-130 108 70-130 110 70-130 105 70-130 105 70-130 107 70-130 97 70-130 103 70-130 Page 16 of 16

1/11/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612505 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/30/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1612505 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/30/2016 DATE COMPLETED: 01/11/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743/43500/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 5.9 "Hg 5.1 psi 02A Alluvium TO-15 5.1 "Hg 5.1 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/11/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612505 Two 6 Liter Summa Canister samples were received on December 30, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1612505-01A Ethanol Acetone 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 3.4 4.2 6.3 7.9 8.4 17 20 40 3.4 4.5 9.9 13 0.84 1.6 3.3 6.4 0.84 8.0 4.6 43 0.84 26 4.5 140 0.84 2.2 4.6 12 0.84 14 5.7 96 Client Sample ID: Alluvium Lab ID#: 1612505-02A Freon 12 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.81 1.8 4.0 9.0 0.81 1.3 3.3 5.4 0.81 4.2 3.2 16 0.81 19 4.4 100 0.81 86 4.4 460 0.81 2.7 4.4 15 0.81 29 5.5 190 Page 4 of 16

File Name: p010909 Dil. Factor: 1.68 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1612505-01A Date of Collection: 12/23/16 10:10:00 A Date of Analysis: 1/9/17 03:51 PM 0.84 Not Detected 4.2 Not Detected 0.84 Not Detected 5.9 Not Detected 8.4 Not Detected 17 Not Detected 0.84 Not Detected 2.1 Not Detected 0.84 Not Detected 1.8 Not Detected 8.4 Not Detected 33 Not Detected 3.4 Not Detected 8.9 Not Detected 0.84 Not Detected 4.7 Not Detected 3.4 4.2 6.3 7.9 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.3 Not Detected 8.4 17 20 40 3.4 Not Detected 8.2 Not Detected 3.4 Not Detected 10 Not Detected 3.4 Not Detected 10 Not Detected 8.4 Not Detected 29 Not Detected 3.4 Not Detected 12 Not Detected 0.84 Not Detected 3.3 Not Detected 0.84 Not Detected 3.0 Not Detected 0.84 Not Detected 3.4 Not Detected 3.4 4.5 9.9 13 0.84 1.6 3.3 6.4 0.84 Not Detected 2.5 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 8.0 4.6 43 0.84 Not Detected 2.9 Not Detected 0.84 Not Detected 5.3 Not Detected 0.84 Not Detected 3.9 Not Detected 0.84 Not Detected 2.7 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 26 4.5 140 0.84 Not Detected 3.9 Not Detected 3.4 Not Detected 12 Not Detected 0.84 Not Detected 5.6 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.2 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 2.2 4.6 12 0.84 14 5.7 96 3.4 Not Detected 14 Not Detected Page 5 of 16

File Name: p010909 Dil. Factor: 1.68 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1612505-01A Date of Collection: 12/23/16 10:10:00 A Date of Analysis: 1/9/17 03:51 PM 0.84 Not Detected 7.2 Not Detected 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.9 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 8.7 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.8 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 4.3 Not Detected 0.84 Not Detected 5.0 Not Detected 3.4 Not Detected 25 Not Detected 3.4 Not Detected 36 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 97 70-130 98 70-130 100 70-130 Page 6 of 16

File Name: p010910 Dil. Factor: 1.62 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1612505-02A Date of Collection: 12/23/16 10:17:00 A Date of Analysis: 1/9/17 04:17 PM 0.81 1.8 4.0 9.0 0.81 Not Detected 5.7 Not Detected 8.1 Not Detected 17 Not Detected 0.81 Not Detected 2.1 Not Detected 0.81 Not Detected 1.8 Not Detected 8.1 Not Detected 31 Not Detected 3.2 Not Detected 8.5 Not Detected 0.81 Not Detected 4.6 Not Detected 3.2 Not Detected 6.1 Not Detected 0.81 Not Detected 6.2 Not Detected 0.81 Not Detected 3.2 Not Detected 8.1 Not Detected 19 Not Detected 3.2 Not Detected 8.0 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.1 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.81 Not Detected 3.2 Not Detected 0.81 Not Detected 2.8 Not Detected 0.81 1.3 3.3 5.4 3.2 Not Detected 9.6 Not Detected 0.81 4.2 3.2 16 0.81 Not Detected 2.4 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 19 4.4 100 0.81 Not Detected 2.8 Not Detected 0.81 Not Detected 5.1 Not Detected 0.81 Not Detected 3.8 Not Detected 0.81 Not Detected 2.6 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 86 4.4 460 0.81 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.81 Not Detected 5.4 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 Not Detected 3.3 Not Detected 0.81 Not Detected 3.0 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 2.7 4.4 15 0.81 29 5.5 190 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: p010910 Dil. Factor: 1.62 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1612505-02A Date of Collection: 12/23/16 10:17:00 A Date of Analysis: 1/9/17 04:17 PM 0.81 Not Detected 6.9 Not Detected 0.81 Not Detected 6.2 Not Detected 0.81 Not Detected 3.7 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.5 Not Detected 0.81 Not Detected 3.4 Not Detected 0.81 Not Detected 8.4 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 5.6 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.0 Not Detected 0.81 Not Detected 4.9 Not Detected 0.81 Not Detected 4.9 Not Detected 0.81 Not Detected 4.2 Not Detected 0.81 Not Detected 4.9 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 97 70-130 101 70-130 Page 8 of 16

File Name: p010906 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612505-03A Date of Collection: NA Date of Analysis: 1/9/17 01:43 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: p010906 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612505-03A Date of Collection: NA Date of Analysis: 1/9/17 01:43 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 103 70-130 99 70-130 100 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1612505-04A File Name: p010902 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 110 106 109 120 122 91 102 103 106 101 113 110 107 101 104 105 106 111 118 108 106 115 114 109 102 115 94 115 101 100 109 106 102 104 103 108 109 102 104 103 101 106 Date of Collection: NA Date of Analysis: 1/9/17 10:54 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1612505-04A File Name: p010902 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 104 100 111 113 113 110 101 110 99 106 105 109 112 103 104 102 102 99 96 Date of Collection: NA Date of Analysis: 1/9/17 10:54 AM 102 70-130 101 70-130 102 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1612505-05A File Name: p010903 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/9/17 11:20 AM 109 70-130 111 70-130 93 70-130 115 70-130 92 70-130 109 70-130 106 70-130 90 70-130 102 70-130 111 70-130 106 70-130 112 70-130 106 70-130 112 70-130 105 70-130 108 70-130 122 70-130 122 70-130 108 70-130 113 70-130 106 70-130 120 70-130 110 70-130 116 70-130 105 70-130 116 70-130 103 70-130 101 70-130 115 70-130 109 70-130 103 70-130 109 70-130 107 70-130 119 70-130 113 70-130 105 70-130 107 70-130 107 70-130 115 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1612505-05A File Name: p010903 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/9/17 11:20 AM 106 70-130 107 70-130 115 70-130 115 70-130 116 70-130 120 70-130 107 70-130 113 70-130 101 70-130 108 70-130 111 70-130 114 70-130 116 70-130 107 70-130 107 70-130 103 70-130 102 70-130 102 70-130 98 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1612505-05AA File Name: p010904 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/9/17 11:46 AM 109 70-130 111 70-130 94 70-130 127 70-130 106 70-130 96 70-130 111 70-130 107 70-130 90 70-130 103 70-130 112 70-130 105 70-130 112 70-130 107 70-130 116 70-130 106 70-130 109 70-130 124 70-130 122 70-130 110 70-130 112 70-130 106 70-130 119 70-130 111 70-130 106 70-130 116 70-130 106 70-130 116 70-130 101 70-130 115 70-130 110 70-130 108 70-130 108 70-130 119 70-130 116 70-130 105 70-130 107 70-130 106 70-130 113 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1612505-05AA File Name: p010904 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/9/17 11:46 AM 105 70-130 106 70-130 113 70-130 115 70-130 115 70-130 119 70-130 107 70-130 112 70-130 100 70-130 107 70-130 114 70-130 113 70-130 116 70-130 105 70-130 107 70-130 107 70-130 106 70-130 105 70-130 102 70-130 98 70-130 103 70-130 Page 16 of 16

1/11/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1612506 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 12/30/2016 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1612506 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 12/30/2016 DATE COMPLETED: 01/11/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743/43500/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 5.9 "Hg 5 psi 02A Alluvium TO-15 3.5 "Hg 5 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/11/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1612506 Two 6 Liter Summa Canister samples were received on December 30, 2016. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1612506-01A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.84 1.5 3.3 5.8 0.84 6.0 4.6 33 0.84 25 4.5 140 0.84 2.6 4.6 14 0.84 14 5.7 92 Client Sample ID: Alluvium Lab ID#: 1612506-02A Freon 12 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.76 1.8 3.8 9.2 0.76 1.1 3.1 4.4 0.76 3.2 3.0 13 0.76 12 4.1 66 0.76 74 4.1 400 0.76 2.4 4.1 13 0.76 24 5.2 160 Page 4 of 16

File Name: p010516 Dil. Factor: 1.67 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1612506-01A Date of Collection: 12/27/16 11:46:00 A Date of Analysis: 1/5/17 10:29 PM 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.8 Not Detected 8.4 Not Detected 17 Not Detected 0.84 Not Detected 2.1 Not Detected 0.84 Not Detected 1.8 Not Detected 8.4 Not Detected 32 Not Detected 3.3 Not Detected 8.8 Not Detected 0.84 Not Detected 4.7 Not Detected 3.3 Not Detected 6.3 Not Detected 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.3 Not Detected 8.4 Not Detected 20 Not Detected 3.3 Not Detected 8.2 Not Detected 3.3 Not Detected 10 Not Detected 3.3 Not Detected 10 Not Detected 8.4 Not Detected 29 Not Detected 3.3 Not Detected 12 Not Detected 0.84 Not Detected 3.3 Not Detected 0.84 Not Detected 2.9 Not Detected 0.84 Not Detected 3.4 Not Detected 3.3 Not Detected 9.8 Not Detected 0.84 1.5 3.3 5.8 0.84 Not Detected 2.5 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 6.0 4.6 33 0.84 Not Detected 2.9 Not Detected 0.84 Not Detected 5.2 Not Detected 0.84 Not Detected 3.9 Not Detected 0.84 Not Detected 2.7 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 25 4.5 140 0.84 Not Detected 3.8 Not Detected 3.3 Not Detected 12 Not Detected 0.84 Not Detected 5.6 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.1 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 2.6 4.6 14 0.84 14 5.7 92 3.3 Not Detected 14 Not Detected Page 5 of 16

File Name: p010516 Dil. Factor: 1.67 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1612506-01A Date of Collection: 12/27/16 11:46:00 A Date of Analysis: 1/5/17 10:29 PM 0.84 Not Detected 7.1 Not Detected 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 8.6 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.7 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 4.3 Not Detected 0.84 Not Detected 5.0 Not Detected 3.3 Not Detected 25 Not Detected 3.3 Not Detected 36 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 96 70-130 95 70-130 Page 6 of 16

File Name: p010517 Dil. Factor: 1.52 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1612506-02A Date of Collection: 12/27/16 11:53:00 A Date of Analysis: 1/5/17 10:55 PM 0.76 1.8 3.8 9.2 0.76 Not Detected 5.3 Not Detected 7.6 Not Detected 16 Not Detected 0.76 Not Detected 1.9 Not Detected 0.76 Not Detected 1.7 Not Detected 7.6 Not Detected 30 Not Detected 3.0 Not Detected 8.0 Not Detected 0.76 Not Detected 4.3 Not Detected 3.0 Not Detected 5.7 Not Detected 0.76 Not Detected 5.8 Not Detected 0.76 Not Detected 3.0 Not Detected 7.6 Not Detected 18 Not Detected 3.0 Not Detected 7.5 Not Detected 3.0 Not Detected 9.5 Not Detected 3.0 Not Detected 9.5 Not Detected 7.6 Not Detected 26 Not Detected 3.0 Not Detected 11 Not Detected 0.76 Not Detected 3.0 Not Detected 0.76 Not Detected 2.7 Not Detected 0.76 1.1 3.1 4.4 3.0 Not Detected 9.0 Not Detected 0.76 3.2 3.0 13 0.76 Not Detected 2.2 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 12 4.1 66 0.76 Not Detected 2.6 Not Detected 0.76 Not Detected 4.8 Not Detected 0.76 Not Detected 3.6 Not Detected 0.76 Not Detected 2.4 Not Detected 0.76 Not Detected 3.1 Not Detected 0.76 Not Detected 3.1 Not Detected 0.76 74 4.1 400 0.76 Not Detected 3.5 Not Detected 3.0 Not Detected 11 Not Detected 0.76 Not Detected 5.1 Not Detected 0.76 Not Detected 3.4 Not Detected 0.76 Not Detected 3.1 Not Detected 0.76 Not Detected 2.9 Not Detected 0.76 Not Detected 3.4 Not Detected 0.76 2.4 4.1 13 0.76 24 5.2 160 3.0 Not Detected 12 Not Detected Page 7 of 16

File Name: p010517 Dil. Factor: 1.52 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1612506-02A Date of Collection: 12/27/16 11:53:00 A Date of Analysis: 1/5/17 10:55 PM 0.76 Not Detected 6.5 Not Detected 0.76 Not Detected 5.8 Not Detected 0.76 Not Detected 3.5 Not Detected 0.76 Not Detected 3.3 Not Detected 0.76 Not Detected 3.3 Not Detected 0.76 Not Detected 3.3 Not Detected 0.76 Not Detected 3.2 Not Detected 0.76 Not Detected 7.8 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 Not Detected 5.2 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 Not Detected 3.7 Not Detected 0.76 Not Detected 4.6 Not Detected 0.76 Not Detected 4.6 Not Detected 0.76 Not Detected 3.9 Not Detected 0.76 Not Detected 4.6 Not Detected 3.0 Not Detected 22 Not Detected 3.0 Not Detected 32 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 107 70-130 96 70-130 102 70-130 Page 8 of 16

File Name: p010505 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1612506-03A Date of Collection: NA Date of Analysis: 1/5/17 01:59 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: p010505 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1612506-03A Date of Collection: NA Date of Analysis: 1/5/17 01:59 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 97 70-130 94 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1612506-04A File Name: p010502 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 107 107 107 120 126 105 103 103 100 102 103 109 98 101 98 105 95 108 107 106 100 106 108 107 102 107 107 106 109 106 110 109 109 107 110 109 110 109 107 112 110 108 Date of Collection: NA Date of Analysis: 1/5/17 12:06 PM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1612506-04A File Name: p010502 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 109 110 106 115 117 114 117 108 112 109 109 110 117 112 108 107 108 107 87 90 Date of Collection: NA Date of Analysis: 1/5/17 12:06 PM 107 70-130 97 70-130 102 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1612506-05A File Name: p010503 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/5/17 12:32 PM 107 70-130 110 70-130 97 70-130 126 70-130 118 70-130 102 70-130 107 70-130 87 70-130 100 70-130 105 70-130 105 70-130 105 70-130 106 70-130 96 70-130 120 70-130 113 70-130 105 70-130 106 70-130 98 70-130 112 70-130 107 70-130 102 70-130 107 70-130 106 70-130 109 70-130 110 70-130 105 70-130 114 70-130 111 70-130 110 70-130 110 70-130 112 70-130 116 70-130 115 70-130 108 70-130 108 70-130 112 70-130 108 70-130 112 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1612506-05A File Name: p010503 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/5/17 12:32 PM 110 70-130 109 70-130 107 70-130 116 70-130 116 70-130 115 70-130 122 70-130 111 70-130 112 70-130 107 70-130 108 70-130 111 70-130 119 70-130 114 70-130 107 70-130 108 70-130 110 70-130 107 70-130 95 70-130 99 70-130 105 70-130 94 70-130 103 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1612506-05AA File Name: p010504 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/5/17 12:59 PM 108 70-130 111 70-130 98 70-130 122 70-130 124 70-130 110 70-130 105 70-130 87 70-130 103 70-130 108 70-130 107 70-130 106 70-130 106 70-130 108 70-130 108 70-130 98 70-130 122 70-130 115 70-130 108 70-130 109 70-130 101 70-130 116 70-130 109 70-130 112 70-130 109 70-130 112 70-130 107 70-130 103 70-130 113 70-130 109 70-130 108 70-130 108 70-130 110 70-130 115 70-130 113 70-130 108 70-130 105 70-130 109 70-130 106 70-130 112 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1612506-05AA File Name: p010504 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/5/17 12:59 PM 107 70-130 107 70-130 106 70-130 114 70-130 114 70-130 114 70-130 120 70-130 109 70-130 111 70-130 108 70-130 112 70-130 115 70-130 114 70-130 106 70-130 108 70-130 109 70-130 105 70-130 102 70-130 106 70-130 98 70-130 102 70-130 Page 16 of 16

1/17/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701049 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/5/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701049 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/05/2017 DATE COMPLETED: 01/17/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501693/22100/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 5.3 "Hg 5.1 psi 02A Alluvium TO-15 5.7 "Hg 4.5 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/17/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701049 Two 6 Liter Summa Canister samples were received on January 05, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701049-01A 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.82 0.91 3.3 3.7 0.82 3.2 3.2 13 0.82 22 4.5 120 0.82 39 4.4 210 0.82 2.1 4.5 11 0.82 18 5.6 120 Client Sample ID: Alluvium Lab ID#: 1701049-02A Freon 12 cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.80 0.88 4.0 4.3 0.80 1.4 3.2 5.6 0.80 6.0 4.4 33 0.80 31 4.3 170 0.80 1.4 4.4 7.6 0.80 13 5.5 88 Page 4 of 16

File Name: 3010920 Dil. Factor: 1.64 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701049-01A Date of Collection: 1/3/17 1:00:00 PM Date of Analysis: 1/9/17 11:14 PM 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 5.7 Not Detected 8.2 Not Detected 17 Not Detected 0.82 Not Detected 2.1 Not Detected 0.82 Not Detected 1.8 Not Detected 8.2 Not Detected 32 Not Detected 3.3 Not Detected 8.6 Not Detected 0.82 Not Detected 4.6 Not Detected 3.3 Not Detected 6.2 Not Detected 0.82 Not Detected 6.3 Not Detected 0.82 Not Detected 3.2 Not Detected 8.2 Not Detected 19 Not Detected 3.3 Not Detected 8.1 Not Detected 3.3 Not Detected 10 Not Detected 3.3 Not Detected 10 Not Detected 8.2 Not Detected 28 Not Detected 3.3 Not Detected 12 Not Detected 0.82 Not Detected 3.2 Not Detected 0.82 Not Detected 2.9 Not Detected 0.82 0.91 3.3 3.7 3.3 Not Detected 9.7 Not Detected 0.82 3.2 3.2 13 0.82 Not Detected 2.4 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 22 4.5 120 0.82 Not Detected 2.8 Not Detected 0.82 Not Detected 5.2 Not Detected 0.82 Not Detected 3.8 Not Detected 0.82 Not Detected 2.6 Not Detected 0.82 Not Detected 3.3 Not Detected 0.82 Not Detected 3.4 Not Detected 0.82 39 4.4 210 0.82 Not Detected 3.8 Not Detected 3.3 Not Detected 12 Not Detected 0.82 Not Detected 5.5 Not Detected 0.82 Not Detected 3.7 Not Detected 0.82 Not Detected 3.4 Not Detected 0.82 Not Detected 3.1 Not Detected 0.82 Not Detected 3.7 Not Detected 0.82 2.1 4.5 11 0.82 18 5.6 120 3.3 Not Detected 13 Not Detected Page 5 of 16

File Name: 3010920 Dil. Factor: 1.64 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701049-01A Date of Collection: 1/3/17 1:00:00 PM Date of Analysis: 1/9/17 11:14 PM 0.82 Not Detected 7.0 Not Detected 0.82 Not Detected 6.3 Not Detected 0.82 Not Detected 3.8 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.5 Not Detected 0.82 Not Detected 8.5 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 5.6 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.9 Not Detected 0.82 Not Detected 4.9 Not Detected 0.82 Not Detected 4.2 Not Detected 0.82 Not Detected 4.9 Not Detected 3.3 Not Detected 24 Not Detected 3.3 Not Detected 35 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 98 70-130 97 70-130 Page 6 of 16

File Name: 3010921 Dil. Factor: 1.61 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701049-02A Date of Collection: 1/3/17 1:12:00 PM Date of Analysis: 1/9/17 11:40 PM 0.80 0.88 4.0 4.3 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 17 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.5 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.1 Not Detected 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.9 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 3.2 Not Detected 3.2 Not Detected 9.5 Not Detected 0.80 1.4 3.2 5.6 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 6.0 4.4 33 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 5.1 Not Detected 0.80 Not Detected 3.8 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 31 4.3 170 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 1.4 4.4 7.6 0.80 13 5.5 88 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: 3010921 Dil. Factor: 1.61 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701049-02A Date of Collection: 1/3/17 1:12:00 PM Date of Analysis: 1/9/17 11:40 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.2 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 95 70-130 Page 8 of 16

File Name: 3010908 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701049-03A Date of Collection: NA Date of Analysis: 1/9/17 03:43 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: 3010908 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701049-03A Date of Collection: NA Date of Analysis: 1/9/17 03:43 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 70-130 101 70-130 98 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701049-04A File Name: 3010904 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 92 90 79 86 85 92 87 90 78 88 88 82 83 89 90 85 90 93 91 92 96 96 91 98 96 94 97 97 101 99 100 110 99 102 104 103 104 101 99 99 99 104 Date of Collection: NA Date of Analysis: 1/9/17 12:22 PM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701049-04A File Name: 3010904 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 99 97 98 100 100 103 101 100 99 101 100 102 102 98 98 102 100 104 104 Date of Collection: NA Date of Analysis: 1/9/17 12:22 PM 103 70-130 97 70-130 100 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701049-05A File Name: 3010905 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/9/17 12:48 PM 98 70-130 98 70-130 81 70-130 93 70-130 87 70-130 97 70-130 92 70-130 96 70-130 72 70-130 89 70-130 94 70-130 88 70-130 90 70-130 98 70-130 94 70-130 92 70-130 93 70-130 110 70-130 96 70-130 98 70-130 102 70-130 95 70-130 98 70-130 103 70-130 100 70-130 99 70-130 100 70-130 101 70-130 100 70-130 98 70-130 102 70-130 109 70-130 99 70-130 103 70-130 105 70-130 110 70-130 106 70-130 101 70-130 99 70-130 101 70-130 99 70-130 105 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701049-05A File Name: 3010905 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/9/17 12:48 PM 102 70-130 99 70-130 97 70-130 98 70-130 99 70-130 98 70-130 103 70-130 98 70-130 97 70-130 97 70-130 100 70-130 100 70-130 101 70-130 95 70-130 96 70-130 102 70-130 96 70-130 100 70-130 99 70-130 97 70-130 101 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701049-05AA File Name: 3010906 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/9/17 01:15 PM 100 70-130 98 70-130 84 70-130 93 70-130 88 70-130 98 70-130 96 70-130 98 70-130 72 70-130 92 70-130 96 70-130 89 70-130 90 70-130 98 70-130 98 70-130 92 70-130 93 70-130 110 70-130 98 70-130 98 70-130 108 70-130 97 70-130 98 70-130 105 70-130 99 70-130 101 70-130 101 70-130 103 70-130 100 70-130 97 70-130 100 70-130 111 70-130 99 70-130 102 70-130 105 70-130 109 70-130 101 70-130 98 70-130 100 70-130 97 70-130 105 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701049-05AA File Name: 3010906 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/9/17 01:15 PM 100 70-130 98 70-130 96 70-130 96 70-130 98 70-130 98 70-130 103 70-130 102 70-130 98 70-130 97 70-130 98 70-130 102 70-130 98 70-130 100 70-130 95 70-130 96 70-130 101 70-130 95 70-130 101 70-130 102 70-130 97 70-130 101 70-130 Page 16 of 16

1/16/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701078 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/9/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701078 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/09/2017 DATE COMPLETED: 01/16/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 5.7 "Hg 5 psi 02A Alluvium TO-15 4.7 "Hg 5.1 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/16/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701078 Two 6 Liter Summa Canister samples were received on January 09, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes All Quality Control Limit exceedances and affected sample results are noted by flags. Each flag is defined at the bottom of this Case Narrative and on each Sample Result Summary page. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701078-01A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.82 0.82 J 3.3 3.2 J 0.82 5.3 4.5 29 0.82 18 4.4 95 0.82 0.99 4.5 5.4 0.82 7.4 5.6 50 Client Sample ID: Alluvium Lab ID#: 1701078-02A Trichloroethene Tetrachloroethene 0.80 6.3 4.3 34 0.80 4.4 5.4 30 Page 4 of 16

File Name: 3011126 Dil. Factor: 1.65 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701078-01A Date of Collection: 1/4/17 1:00:00 PM Date of Analysis: 1/11/17 11:55 PM 0.82 Not Detected 4.1 Not Detected 0.82 Not Detected 5.8 Not Detected 8.2 Not Detected 17 Not Detected 0.82 Not Detected 2.1 Not Detected 0.82 Not Detected 1.8 Not Detected 8.2 Not Detected 32 Not Detected 3.3 Not Detected 8.7 Not Detected 0.82 Not Detected 4.6 Not Detected 3.3 Not Detected 6.2 Not Detected 0.82 Not Detected 6.3 Not Detected 0.82 Not Detected 3.3 Not Detected 8.2 Not Detected 20 Not Detected 3.3 Not Detected 8.1 Not Detected 3.3 Not Detected 10 Not Detected 3.3 Not Detected 10 Not Detected 8.2 Not Detected 29 Not Detected 3.3 Not Detected 12 Not Detected 0.82 Not Detected 3.3 Not Detected 0.82 Not Detected 2.9 Not Detected 0.82 Not Detected 3.3 Not Detected 3.3 Not Detected 9.7 Not Detected 0.82 0.82 J 3.3 3.2 J 0.82 Not Detected 2.4 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 5.3 4.5 29 0.82 Not Detected 2.8 Not Detected 0.82 Not Detected 5.2 Not Detected 0.82 Not Detected 3.8 Not Detected 0.82 Not Detected 2.6 Not Detected 0.82 Not Detected 3.3 Not Detected 0.82 Not Detected 3.4 Not Detected 0.82 18 4.4 95 0.82 Not Detected 3.8 Not Detected 3.3 Not Detected 12 Not Detected 0.82 Not Detected 5.5 Not Detected 0.82 Not Detected 3.7 Not Detected 0.82 Not Detected 3.4 Not Detected 0.82 Not Detected 3.1 Not Detected 0.82 Not Detected 3.7 Not Detected 0.82 0.99 4.5 5.4 0.82 7.4 5.6 50 3.3 Not Detected 14 Not Detected Page 5 of 16

File Name: 3011126 Dil. Factor: 1.65 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701078-01A Date of Collection: 1/4/17 1:00:00 PM Date of Analysis: 1/11/17 11:55 PM 0.82 Not Detected 7.0 Not Detected 0.82 Not Detected 6.3 Not Detected 0.82 Not Detected 3.8 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.6 Not Detected 0.82 Not Detected 3.5 Not Detected 0.82 Not Detected 8.5 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 5.7 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 4.0 Not Detected 0.82 Not Detected 5.0 Not Detected 0.82 Not Detected 5.0 Not Detected 0.82 Not Detected 4.3 Not Detected 0.82 Not Detected 5.0 Not Detected 3.3 Not Detected 24 Not Detected 3.3 Not Detected 35 Not Detected J = Estimated value. Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 108 70-130 99 70-130 94 70-130 Page 6 of 16

File Name: 3011127 Dil. Factor: 1.60 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701078-02A Date of Collection: 1/4/17 1:20:00 PM Date of Analysis: 1/12/17 12:21 AM 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 16 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.4 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.0 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.9 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 3.2 Not Detected 3.2 Not Detected 9.4 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 4.4 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 5.0 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 6.3 4.3 34 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 4.4 Not Detected 0.80 4.4 5.4 30 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: 3011127 Dil. Factor: 1.60 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701078-02A Date of Collection: 1/4/17 1:20:00 PM Date of Analysis: 1/12/17 12:21 AM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.1 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 108 70-130 99 70-130 96 70-130 Page 8 of 16

File Name: 3011110 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701078-03A Date of Collection: NA Date of Analysis: 1/11/17 02:11 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: 3011110 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701078-03A Date of Collection: NA Date of Analysis: 1/11/17 02:11 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 98 70-130 99 70-130 100 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701078-04A File Name: 3011107 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 96 92 72 80 78 90 81 95 70 92 89 78 75 84 82 80 85 94 82 87 90 94 78 97 96 92 99 89 96 98 92 110 94 100 103 100 99 104 95 98 101 96 Date of Collection: NA Date of Analysis: 1/11/17 11:53 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701078-04A File Name: 3011107 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 101 98 99 99 102 101 104 103 102 99 100 105 101 101 101 101 101 101 85 87 Date of Collection: NA Date of Analysis: 1/11/17 11:53 AM 105 70-130 95 70-130 103 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701078-05A File Name: 3011104 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/11/17 10:06 AM 100 70-130 96 70-130 72 70-130 85 70-130 78 70-130 93 70-130 84 70-130 99 70-130 60 Q 70-130 90 70-130 89 70-130 81 70-130 77 70-130 90 70-130 87 70-130 80 70-130 84 70-130 84 70-130 89 70-130 94 70-130 88 70-130 84 70-130 100 70-130 97 70-130 91 70-130 101 70-130 91 70-130 99 70-130 99 70-130 97 70-130 109 70-130 98 70-130 102 70-130 108 70-130 108 70-130 103 70-130 106 70-130 94 70-130 100 70-130 101 70-130 99 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701078-05A File Name: 3011104 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/11/17 10:06 AM 103 70-130 99 70-130 99 70-130 99 70-130 100 70-130 100 70-130 105 70-130 106 70-130 99 70-130 100 70-130 98 70-130 102 70-130 103 70-130 99 70-130 99 70-130 100 70-130 102 70-130 100 70-130 101 70-130 106 70-130 108 70-130 94 70-130 102 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701078-05AA File Name: 3011105 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/11/17 10:32 AM 101 70-130 98 70-130 75 70-130 85 70-130 78 70-130 92 70-130 86 70-130 100 70-130 60 Q 70-130 93 70-130 92 70-130 79 70-130 78 70-130 90 70-130 87 70-130 82 70-130 87 70-130 102 70-130 85 70-130 91 70-130 96 70-130 90 70-130 83 70-130 102 70-130 98 70-130 92 70-130 101 70-130 92 70-130 99 70-130 98 70-130 97 70-130 115 70-130 98 70-130 103 70-130 109 70-130 110 70-130 103 70-130 107 70-130 94 70-130 99 70-130 101 70-130 100 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701078-05AA File Name: 3011105 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Q = Exceeds Quality Control limits. Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/11/17 10:32 AM 103 70-130 99 70-130 99 70-130 99 70-130 101 70-130 101 70-130 107 70-130 107 70-130 100 70-130 101 70-130 100 70-130 105 70-130 103 70-130 102 70-130 101 70-130 103 70-130 103 70-130 101 70-130 107 70-130 109 70-130 96 70-130 102 70-130 Page 16 of 16

1/23/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701108R1 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/20/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701108R1 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/20/2017 DATE COMPLETED: 01/18/2017 DATE REISSUED: 01/23/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501693/22100/220 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 6.7 "Hg 5.1 psi 02A Alluvium TO-15 4.7 "Hg 4.9 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/23/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701108R1 Two 6 Liter Summa Canister samples were received on January 10, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. The workorder was reissued on January 23, 2017 to correct the surrogate recoveries in samples Till and Alluvium due to laboratory error. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701108R1-01A Ethanol Acetone cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene Toluene 1,1,2-Trichloroethane Tetrachloroethene 3.5 3.8 6.5 7.1 8.6 9.7 20 23 0.86 0.88 3.4 3.5 0.86 4.8 4.7 26 0.86 14 4.6 73 0.86 1.2 3.2 4.4 0.86 0.86 4.7 4.7 0.86 6.6 5.9 45 Client Sample ID: Alluvium Lab ID#: 1701108R1-02A 2-Butanone (Methyl Ethyl Ketone) 1,1,1-Trichloroethane Trichloroethene Tetrachloroethene 3.2 5.1 9.3 15 0.79 1.3 4.3 7.3 0.79 7.9 4.2 42 0.79 4.7 5.4 32 Page 4 of 16

File Name: 17011216r1 Dil. Factor: 1.73 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701108R1-01A Date of Collection: 1/6/17 1:00:00 PM Date of Analysis: 1/12/17 07:29 PM 0.86 Not Detected 4.3 Not Detected 0.86 Not Detected 6.0 Not Detected 8.6 Not Detected 18 Not Detected 0.86 Not Detected 2.2 Not Detected 0.86 Not Detected 1.9 Not Detected 8.6 Not Detected 34 Not Detected 3.5 Not Detected 9.1 Not Detected 0.86 Not Detected 4.9 Not Detected 3.5 3.8 6.5 7.1 0.86 Not Detected 6.6 Not Detected 0.86 Not Detected 3.4 Not Detected 8.6 9.7 20 23 3.5 Not Detected 8.5 Not Detected 3.5 Not Detected 11 Not Detected 3.5 Not Detected 11 Not Detected 8.6 Not Detected 30 Not Detected 3.5 Not Detected 12 Not Detected 0.86 Not Detected 3.4 Not Detected 0.86 Not Detected 3.0 Not Detected 0.86 Not Detected 3.5 Not Detected 3.5 Not Detected 10 Not Detected 0.86 0.88 3.4 3.5 0.86 Not Detected 2.6 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 4.8 4.7 26 0.86 Not Detected 3.0 Not Detected 0.86 Not Detected 5.4 Not Detected 0.86 Not Detected 4.0 Not Detected 0.86 Not Detected 2.8 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 14 4.6 73 0.86 Not Detected 4.0 Not Detected 3.5 Not Detected 12 Not Detected 0.86 Not Detected 5.8 Not Detected 0.86 Not Detected 3.9 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 1.2 3.2 4.4 0.86 Not Detected 3.9 Not Detected 0.86 0.86 4.7 4.7 0.86 6.6 5.9 45 3.5 Not Detected 14 Not Detected Page 5 of 16

File Name: 17011216r1 Dil. Factor: 1.73 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701108R1-01A Date of Collection: 1/6/17 1:00:00 PM Date of Analysis: 1/12/17 07:29 PM 0.86 Not Detected 7.4 Not Detected 0.86 Not Detected 6.6 Not Detected 0.86 Not Detected 4.0 Not Detected 0.86 Not Detected 3.8 Not Detected 0.86 Not Detected 3.8 Not Detected 0.86 Not Detected 3.8 Not Detected 0.86 Not Detected 3.7 Not Detected 0.86 Not Detected 8.9 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 5.9 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 5.2 Not Detected 0.86 Not Detected 5.2 Not Detected 0.86 Not Detected 4.5 Not Detected 0.86 Not Detected 5.2 Not Detected 3.5 Not Detected 26 Not Detected 3.5 Not Detected 37 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 99 70-130 95 70-130 Page 6 of 16

File Name: 17011215r1 Dil. Factor: 1.58 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701108R1-02A Date of Collection: 1/6/17 1:15:00 PM Date of Analysis: 1/12/17 07:00 PM 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.5 Not Detected 7.9 Not Detected 16 Not Detected 0.79 Not Detected 2.0 Not Detected 0.79 Not Detected 1.7 Not Detected 7.9 Not Detected 31 Not Detected 3.2 Not Detected 8.3 Not Detected 0.79 Not Detected 4.4 Not Detected 3.2 Not Detected 6.0 Not Detected 0.79 Not Detected 6.0 Not Detected 0.79 Not Detected 3.1 Not Detected 7.9 Not Detected 19 Not Detected 3.2 Not Detected 7.8 Not Detected 3.2 Not Detected 9.8 Not Detected 3.2 Not Detected 9.9 Not Detected 7.9 Not Detected 27 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 3.1 Not Detected 0.79 Not Detected 2.8 Not Detected 0.79 Not Detected 3.2 Not Detected 3.2 5.1 9.3 15 0.79 Not Detected 3.1 Not Detected 0.79 Not Detected 2.3 Not Detected 0.79 Not Detected 3.8 Not Detected 0.79 1.3 4.3 7.3 0.79 Not Detected 2.7 Not Detected 0.79 Not Detected 5.0 Not Detected 0.79 Not Detected 3.7 Not Detected 0.79 Not Detected 2.5 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 7.9 4.2 42 0.79 Not Detected 3.6 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 5.3 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.0 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 4.3 Not Detected 0.79 4.7 5.4 32 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: 17011215r1 Dil. Factor: 1.58 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701108R1-02A Date of Collection: 1/6/17 1:15:00 PM Date of Analysis: 1/12/17 07:00 PM 0.79 Not Detected 6.7 Not Detected 0.79 Not Detected 6.1 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 8.2 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.4 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.1 Not Detected 0.79 Not Detected 4.7 Not Detected 3.2 Not Detected 23 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 94 70-130 97 70-130 Page 8 of 16

File Name: 17011205 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701108R1-03A Date of Collection: NA Date of Analysis: 1/12/17 12:25 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: 17011205 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701108R1-03A Date of Collection: NA Date of Analysis: 1/12/17 12:25 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 95 70-130 95 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701108R1-04A File Name: 17011202 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 100 101 108 101 99 104 96 100 99 98 103 100 108 101 103 102 103 102 108 105 104 105 105 104 101 105 102 109 94 103 108 102 102 104 103 107 103 104 106 102 103 108 Date of Collection: NA Date of Analysis: 1/12/17 10:53 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701108R1-04A File Name: 17011202 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 105 105 102 105 108 109 111 108 108 102 105 106 108 110 104 105 109 103 98 97 Date of Collection: NA Date of Analysis: 1/12/17 10:53 AM 101 70-130 100 70-130 101 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701108R1-05A File Name: 17011203 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/12/17 11:20 AM 102 70-130 102 70-130 103 70-130 97 70-130 105 70-130 101 70-130 101 70-130 88 70-130 97 70-130 101 70-130 100 70-130 111 70-130 102 70-130 108 70-130 101 70-130 111 70-130 109 70-130 102 70-130 105 70-130 97 70-130 107 70-130 102 70-130 101 70-130 106 70-130 102 70-130 108 70-130 93 70-130 101 70-130 110 70-130 101 70-130 102 70-130 106 70-130 105 70-130 112 70-130 106 70-130 102 70-130 102 70-130 101 70-130 109 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701108R1-05A File Name: 17011203 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/12/17 11:20 AM 105 70-130 103 70-130 99 70-130 105 70-130 108 70-130 111 70-130 110 70-130 107 70-130 100 70-130 106 70-130 110 70-130 107 70-130 112 70-130 106 70-130 111 70-130 102 70-130 95 70-130 94 70-130 100 70-130 101 70-130 101 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701108R1-05AA File Name: 17011204 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/12/17 11:47 AM 102 70-130 102 70-130 103 70-130 102 70-130 96 70-130 100 70-130 100 70-130 85 70-130 97 70-130 101 70-130 99 70-130 110 70-130 101 70-130 106 70-130 99 70-130 102 70-130 109 70-130 107 70-130 100 70-130 94 70-130 102 70-130 100 70-130 102 70-130 106 70-130 92 70-130 100 70-130 110 70-130 101 70-130 102 70-130 113 70-130 106 70-130 102 70-130 101 70-130 102 70-130 109 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701108R1-05AA File Name: 17011204 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/12/17 11:47 AM 103 70-130 99 70-130 103 70-130 105 70-130 107 70-130 112 70-130 111 70-130 107 70-130 100 70-130 105 70-130 109 70-130 107 70-130 112 70-130 107 70-130 111 70-130 102 70-130 102 70-130 99 70-130 100 70-130 97 70-130 101 70-130 Page 16 of 16

1/30/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701266 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/19/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701266 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/19/2017 DATE COMPLETED: 01/30/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 8.2 "Hg 5.2 psi 02A Alluvium TO-15 8.2 "Hg 5.2 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 01/30/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701266 Two 6 Liter Summa Canister samples were received on January 19, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes According to the Chain of Custody (COC), samples Till and Alluvium were collected on 1/10/17. However, the date on the sample tag reflects a collection date of 1/10/16. Therefore the date on the COC was used to calculate the sample holding time. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701266-01A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.93 1.3 3.7 5.3 0.93 4.9 5.1 27 0.93 19 5.0 100 0.93 1.5 5.1 8.0 0.93 9.3 6.3 63 Client Sample ID: Alluvium Lab ID#: 1701266-02A Freon 12 2-Propanol 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.93 0.93 4.6 4.6 3.7 4.3 9.1 10 0.93 2.3 5.1 13 0.93 15 5.0 80 0.93 1.0 5.1 5.5 0.93 6.8 6.3 46 Page 4 of 16

File Name: 17012426 Dil. Factor: 1.86 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701266-01A Date of Collection: 1/10/17 10:50:00 AM Date of Analysis: 1/25/17 03:20 AM 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 6.5 Not Detected 9.3 Not Detected 19 Not Detected 0.93 Not Detected 2.4 Not Detected 0.93 Not Detected 2.0 Not Detected 9.3 Not Detected 36 Not Detected 3.7 Not Detected 9.8 Not Detected 0.93 Not Detected 5.2 Not Detected 3.7 Not Detected 7.0 Not Detected 0.93 Not Detected 7.1 Not Detected 0.93 Not Detected 3.7 Not Detected 9.3 Not Detected 22 Not Detected 3.7 Not Detected 9.1 Not Detected 3.7 Not Detected 12 Not Detected 3.7 Not Detected 12 Not Detected 9.3 Not Detected 32 Not Detected 3.7 Not Detected 13 Not Detected 0.93 Not Detected 3.7 Not Detected 0.93 Not Detected 3.3 Not Detected 0.93 Not Detected 3.8 Not Detected 3.7 Not Detected 11 Not Detected 0.93 1.3 3.7 5.3 0.93 Not Detected 2.7 Not Detected 0.93 Not Detected 4.5 Not Detected 0.93 4.9 5.1 27 0.93 Not Detected 3.2 Not Detected 0.93 Not Detected 5.8 Not Detected 0.93 Not Detected 4.3 Not Detected 0.93 Not Detected 3.0 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 19 5.0 100 0.93 Not Detected 4.3 Not Detected 3.7 Not Detected 13 Not Detected 0.93 Not Detected 6.2 Not Detected 0.93 Not Detected 4.2 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 Not Detected 3.5 Not Detected 0.93 Not Detected 4.2 Not Detected 0.93 1.5 5.1 8.0 0.93 9.3 6.3 63 3.7 Not Detected 15 Not Detected Page 5 of 16

File Name: 17012426 Dil. Factor: 1.86 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701266-01A Date of Collection: 1/10/17 10:50:00 AM Date of Analysis: 1/25/17 03:20 AM 0.93 Not Detected 7.9 Not Detected 0.93 Not Detected 7.1 Not Detected 0.93 Not Detected 4.3 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 9.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 6.4 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 5.6 Not Detected 0.93 Not Detected 5.6 Not Detected 0.93 Not Detected 4.8 Not Detected 0.93 Not Detected 5.6 Not Detected 3.7 Not Detected 28 Not Detected 3.7 Not Detected 40 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 100 70-130 91 70-130 Page 6 of 16

File Name: 17012427 Dil. Factor: 1.86 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701266-02A Date of Collection: 1/10/17 11:00:00 AM Date of Analysis: 1/25/17 03:48 AM 0.93 0.93 4.6 4.6 0.93 Not Detected 6.5 Not Detected 9.3 Not Detected 19 Not Detected 0.93 Not Detected 2.4 Not Detected 0.93 Not Detected 2.0 Not Detected 9.3 Not Detected 36 Not Detected 3.7 Not Detected 9.8 Not Detected 0.93 Not Detected 5.2 Not Detected 3.7 Not Detected 7.0 Not Detected 0.93 Not Detected 7.1 Not Detected 0.93 Not Detected 3.7 Not Detected 9.3 Not Detected 22 Not Detected 3.7 4.3 9.1 10 3.7 Not Detected 12 Not Detected 3.7 Not Detected 12 Not Detected 9.3 Not Detected 32 Not Detected 3.7 Not Detected 13 Not Detected 0.93 Not Detected 3.7 Not Detected 0.93 Not Detected 3.3 Not Detected 0.93 Not Detected 3.8 Not Detected 3.7 Not Detected 11 Not Detected 0.93 Not Detected 3.7 Not Detected 0.93 Not Detected 2.7 Not Detected 0.93 Not Detected 4.5 Not Detected 0.93 2.3 5.1 13 0.93 Not Detected 3.2 Not Detected 0.93 Not Detected 5.8 Not Detected 0.93 Not Detected 4.3 Not Detected 0.93 Not Detected 3.0 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 15 5.0 80 0.93 Not Detected 4.3 Not Detected 3.7 Not Detected 13 Not Detected 0.93 Not Detected 6.2 Not Detected 0.93 Not Detected 4.2 Not Detected 0.93 Not Detected 3.8 Not Detected 0.93 Not Detected 3.5 Not Detected 0.93 Not Detected 4.2 Not Detected 0.93 1.0 5.1 5.5 0.93 6.8 6.3 46 3.7 Not Detected 15 Not Detected Page 7 of 16

File Name: 17012427 Dil. Factor: 1.86 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701266-02A Date of Collection: 1/10/17 11:00:00 AM Date of Analysis: 1/25/17 03:48 AM 0.93 Not Detected 7.9 Not Detected 0.93 Not Detected 7.1 Not Detected 0.93 Not Detected 4.3 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 4.0 Not Detected 0.93 Not Detected 9.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 6.4 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 4.6 Not Detected 0.93 Not Detected 5.6 Not Detected 0.93 Not Detected 5.6 Not Detected 0.93 Not Detected 4.8 Not Detected 0.93 Not Detected 5.6 Not Detected 3.7 Not Detected 28 Not Detected 3.7 Not Detected 40 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 99 70-130 89 70-130 Page 8 of 16

File Name: 17012407 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701266-03A Date of Collection: NA Date of Analysis: 1/24/17 01:49 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: 17012407 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701266-03A Date of Collection: NA Date of Analysis: 1/24/17 01:49 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 101 70-130 103 70-130 88 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701266-04A File Name: 17012402 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 102 100 115 108 107 109 106 102 104 97 103 104 111 107 107 108 104 102 112 111 107 107 112 107 100 106 101 108 102 109 113 106 112 107 108 111 110 108 110 106 101 113 Date of Collection: NA Date of Analysis: 1/24/17 09:47 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701266-04A File Name: 17012402 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 106 107 102 105 107 107 112 107 108 108 106 105 104 106 103 105 111 102 97 93 Date of Collection: NA Date of Analysis: 1/24/17 09:47 AM 102 70-130 98 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701266-05A File Name: 17012403 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/24/17 10:16 AM 101 70-130 100 70-130 117 70-130 111 70-130 103 70-130 107 70-130 108 70-130 102 70-130 89 70-130 94 70-130 101 70-130 106 70-130 116 70-130 108 70-130 111 70-130 107 70-130 101 70-130 109 70-130 112 70-130 106 70-130 108 70-130 96 70-130 113 70-130 100 70-130 107 70-130 100 70-130 106 70-130 98 70-130 102 70-130 109 70-130 107 70-130 107 70-130 107 70-130 115 70-130 110 70-130 105 70-130 107 70-130 105 70-130 98 70-130 115 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701266-05A File Name: 17012403 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/24/17 10:16 AM 105 70-130 105 70-130 100 70-130 102 70-130 106 70-130 109 70-130 107 70-130 105 70-130 106 70-130 106 70-130 100 70-130 103 70-130 111 70-130 100 70-130 91 70-130 89 70-130 102 70-130 98 70-130 95 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701266-05AA File Name: 17012404 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/24/17 10:43 AM 103 70-130 119 70-130 113 70-130 106 70-130 112 70-130 111 70-130 103 70-130 91 70-130 97 70-130 107 70-130 118 70-130 110 70-130 113 70-130 110 70-130 105 70-130 114 70-130 116 70-130 110 70-130 110 70-130 99 70-130 115 70-130 106 70-130 103 70-130 109 70-130 103 70-130 109 70-130 99 70-130 110 70-130 103 70-130 109 70-130 108 70-130 108 70-130 115 70-130 110 70-130 105 70-130 108 70-130 106 70-130 98 70-130 114 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701266-05AA File Name: 17012404 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/24/17 10:43 AM 106 70-130 106 70-130 101 70-130 106 70-130 106 70-130 111 70-130 108 70-130 106 70-130 106 70-130 106 70-130 107 70-130 106 70-130 109 70-130 102 70-130 105 70-130 113 70-130 101 70-130 98 70-130 95 70-130 102 70-130 105 70-130 98 70-130 Page 16 of 16

2/2/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701328 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/24/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701328 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/24/2017 DATE COMPLETED: 02/02/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 6.1 "Hg 4.9 psi 02A Alluvium TO-15 5.1 "Hg 4.8 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 02/02/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701328 Two 6 Liter Summa Canister samples were received on January 24, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701328-01A Ethanol 1,1-Dichloroethane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 3.3 9.6 6.3 18 0.84 0.83 J 3.4 3.4 J 0.84 2.7 3.3 10 0.84 17 4.6 95 0.84 24 4.5 130 0.84 1.4 4.6 7.4 0.84 11 5.7 78 Client Sample ID: Alluvium Lab ID#: 1701328-02A 1,1,1-Trichloroethane Trichloroethene Tetrachloroethene 0.80 2.7 4.4 15 0.80 13 4.3 70 0.80 6.6 5.4 45 Page 4 of 16

File Name: a012718 Dil. Factor: 1.67 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701328-01A Date of Collection: 1/17/17 2:10:00 PM Date of Analysis: 1/27/17 09:20 PM 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.8 Not Detected 8.4 Not Detected 17 Not Detected 0.84 Not Detected 2.1 Not Detected 0.84 Not Detected 1.8 Not Detected 8.4 Not Detected 32 Not Detected 3.3 Not Detected 8.8 Not Detected 0.84 Not Detected 4.7 Not Detected 3.3 9.6 6.3 18 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.3 Not Detected 8.4 Not Detected 20 Not Detected 3.3 Not Detected 8.2 Not Detected 3.3 Not Detected 10 Not Detected 3.3 Not Detected 10 Not Detected 8.4 Not Detected 29 Not Detected 3.3 Not Detected 12 Not Detected 0.84 Not Detected 3.3 Not Detected 0.84 Not Detected 2.9 Not Detected 0.84 0.83 J 3.4 3.4 J 3.3 Not Detected 9.8 Not Detected 0.84 2.7 3.3 10 0.84 Not Detected 2.5 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 17 4.6 95 0.84 Not Detected 2.9 Not Detected 0.84 Not Detected 5.2 Not Detected 0.84 Not Detected 3.9 Not Detected 0.84 Not Detected 2.7 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 24 4.5 130 0.84 Not Detected 3.8 Not Detected 3.3 Not Detected 12 Not Detected 0.84 Not Detected 5.6 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 Not Detected 3.4 Not Detected 0.84 Not Detected 3.1 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 1.4 4.6 7.4 0.84 11 5.7 78 3.3 Not Detected 14 Not Detected Page 5 of 16

File Name: a012718 Dil. Factor: 1.67 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701328-01A Date of Collection: 1/17/17 2:10:00 PM Date of Analysis: 1/27/17 09:20 PM 0.84 Not Detected 7.1 Not Detected 0.84 Not Detected 6.4 Not Detected 0.84 Not Detected 3.8 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 3.6 Not Detected 0.84 Not Detected 8.6 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.7 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 4.1 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 5.0 Not Detected 0.84 Not Detected 4.3 Not Detected 0.84 Not Detected 5.0 Not Detected 3.3 Not Detected 25 Not Detected 3.3 Not Detected 36 Not Detected J = Estimated value. Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 103 70-130 99 70-130 98 70-130 Page 6 of 16

File Name: a012719 Dil. Factor: 1.60 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701328-02A Date of Collection: 1/17/17 2:20:00 PM Date of Analysis: 1/27/17 09:46 PM 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 16 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.4 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.0 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.9 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 3.2 Not Detected 3.2 Not Detected 9.4 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 2.7 4.4 15 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 5.0 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 13 4.3 70 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 4.4 Not Detected 0.80 6.6 5.4 45 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: a012719 Dil. Factor: 1.60 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701328-02A Date of Collection: 1/17/17 2:20:00 PM Date of Analysis: 1/27/17 09:46 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.1 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 103 70-130 Page 8 of 16

File Name: a012707 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701328-03A Date of Collection: NA Date of Analysis: 1/27/17 12:44 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: a012707 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701328-03A Date of Collection: NA Date of Analysis: 1/27/17 12:44 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 101 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701328-04A File Name: a012702 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 103 99 109 100 103 96 98 100 99 96 98 104 103 98 94 104 95 97 98 98 95 98 101 99 93 95 95 99 93 105 94 92 95 95 99 102 96 96 89 83 86 88 Date of Collection: NA Date of Analysis: 1/27/17 08:36 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701328-04A File Name: a012702 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 88 88 86 86 87 88 87 87 86 88 86 86 84 85 87 85 87 85 83 84 Date of Collection: NA Date of Analysis: 1/27/17 08:36 AM 102 70-130 101 70-130 102 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701328-05A File Name: a012703 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/27/17 09:01 AM 94 70-130 92 70-130 102 70-130 95 70-130 92 70-130 91 70-130 92 70-130 92 70-130 85 70-130 89 70-130 89 70-130 94 70-130 96 70-130 91 70-130 92 70-130 93 70-130 90 70-130 98 70-130 93 70-130 89 70-130 91 70-130 83 70-130 95 70-130 91 70-130 87 70-130 91 70-130 91 70-130 94 70-130 89 70-130 97 70-130 93 70-130 91 70-130 90 70-130 95 70-130 95 70-130 102 70-130 95 70-130 93 70-130 88 70-130 82 70-130 83 70-130 91 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701328-05A File Name: a012703 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/27/17 09:01 AM 86 70-130 85 70-130 84 70-130 86 70-130 86 70-130 87 70-130 89 70-130 88 70-130 83 70-130 87 70-130 86 70-130 86 70-130 83 70-130 85 70-130 87 70-130 85 70-130 89 70-130 84 70-130 83 70-130 82 70-130 100 70-130 99 70-130 103 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701328-05AA File Name: a012704 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/27/17 09:26 AM 93 70-130 92 70-130 101 70-130 93 70-130 89 70-130 90 70-130 92 70-130 92 70-130 77 70-130 87 70-130 88 70-130 93 70-130 93 70-130 90 70-130 93 70-130 92 70-130 90 70-130 98 70-130 92 70-130 88 70-130 89 70-130 81 70-130 96 70-130 91 70-130 87 70-130 89 70-130 90 70-130 92 70-130 88 70-130 99 70-130 92 70-130 90 70-130 93 70-130 96 70-130 95 70-130 103 70-130 96 70-130 92 70-130 87 70-130 84 70-130 84 70-130 91 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701328-05AA File Name: a012704 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/27/17 09:26 AM 88 70-130 85 70-130 86 70-130 87 70-130 87 70-130 88 70-130 90 70-130 90 70-130 85 70-130 88 70-130 86 70-130 89 70-130 82 70-130 86 70-130 87 70-130 86 70-130 90 70-130 85 70-130 85 70-130 87 70-130 102 70-130 98 70-130 Page 16 of 16

2/2/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701331 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/24/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701331 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/24/2017 DATE COMPLETED: 02/02/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 7.3 "Hg 4.9 psi 02A Alluvium TO-15 5.1 "Hg 5 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 02/02/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701331 Two 6 Liter Summa Canister samples were received on January 24, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701331-01A Ethanol Acetone 2-Propanol 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene 1,1,1-Trichloroethane Benzene Trichloroethene Toluene 1,1,2-Trichloroethane Tetrachloroethene m,p-xylene 3.5 4.7 6.6 8.9 8.8 13 21 30 3.5 3.6 8.6 8.8 3.5 3.8 10 11 0.88 1.3 3.5 5.2 0.88 6.1 4.8 34 0.88 1.0 2.8 3.3 0.88 16 4.7 88 0.88 1.6 3.3 5.9 0.88 1.3 4.8 7.1 0.88 8.5 6.0 58 0.88 0.98 3.8 4.3 Client Sample ID: Alluvium Lab ID#: 1701331-02A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.80 1.3 3.2 5.1 0.80 4.5 4.4 24 0.80 26 4.3 140 0.80 1.2 4.4 6.7 0.80 11 5.5 77 Page 4 of 16

File Name: a012717 Dil. Factor: 1.76 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701331-01A Date of Collection: 1/18/17 1:30:00 PM Date of Analysis: 1/27/17 07:21 PM 0.88 Not Detected 4.4 Not Detected 0.88 Not Detected 6.2 Not Detected 8.8 Not Detected 18 Not Detected 0.88 Not Detected 2.2 Not Detected 0.88 Not Detected 1.9 Not Detected 8.8 Not Detected 34 Not Detected 3.5 Not Detected 9.3 Not Detected 0.88 Not Detected 4.9 Not Detected 3.5 4.7 6.6 8.9 0.88 Not Detected 6.7 Not Detected 0.88 Not Detected 3.5 Not Detected 8.8 13 21 30 3.5 3.6 8.6 8.8 3.5 Not Detected 11 Not Detected 3.5 Not Detected 11 Not Detected 8.8 Not Detected 30 Not Detected 3.5 Not Detected 13 Not Detected 0.88 Not Detected 3.5 Not Detected 0.88 Not Detected 3.1 Not Detected 0.88 Not Detected 3.6 Not Detected 3.5 3.8 10 11 0.88 1.3 3.5 5.2 0.88 Not Detected 2.6 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 6.1 4.8 34 0.88 Not Detected 3.0 Not Detected 0.88 Not Detected 5.5 Not Detected 0.88 Not Detected 4.1 Not Detected 0.88 1.0 2.8 3.3 0.88 Not Detected 3.6 Not Detected 0.88 Not Detected 3.6 Not Detected 0.88 16 4.7 88 0.88 Not Detected 4.1 Not Detected 3.5 Not Detected 13 Not Detected 0.88 Not Detected 5.9 Not Detected 0.88 Not Detected 4.0 Not Detected 0.88 Not Detected 3.6 Not Detected 0.88 1.6 3.3 5.9 0.88 Not Detected 4.0 Not Detected 0.88 1.3 4.8 7.1 0.88 8.5 6.0 58 3.5 Not Detected 14 Not Detected Page 5 of 16

File Name: a012717 Dil. Factor: 1.76 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701331-01A Date of Collection: 1/18/17 1:30:00 PM Date of Analysis: 1/27/17 07:21 PM 0.88 Not Detected 7.5 Not Detected 0.88 Not Detected 6.8 Not Detected 0.88 Not Detected 4.0 Not Detected 0.88 Not Detected 3.8 Not Detected 0.88 0.98 3.8 4.3 0.88 Not Detected 3.8 Not Detected 0.88 Not Detected 3.7 Not Detected 0.88 Not Detected 9.1 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 Not Detected 6.0 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 Not Detected 4.3 Not Detected 0.88 Not Detected 5.3 Not Detected 0.88 Not Detected 5.3 Not Detected 0.88 Not Detected 4.6 Not Detected 0.88 Not Detected 5.3 Not Detected 3.5 Not Detected 26 Not Detected 3.5 Not Detected 38 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 101 70-130 Page 6 of 16

File Name: a012716 Dil. Factor: 1.61 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701331-02A Date of Collection: 1/18/17 1:45:00 PM Date of Analysis: 1/27/17 06:54 PM 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 17 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.5 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.1 Not Detected 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.9 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 3.2 Not Detected 3.2 Not Detected 9.5 Not Detected 0.80 1.3 3.2 5.1 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 4.5 4.4 24 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 5.1 Not Detected 0.80 Not Detected 3.8 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 26 4.3 140 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 1.2 4.4 6.7 0.80 11 5.5 77 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: a012716 Dil. Factor: 1.61 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701331-02A Date of Collection: 1/18/17 1:45:00 PM Date of Analysis: 1/27/17 06:54 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.2 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.0 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.2 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 99 70-130 Page 8 of 16

File Name: a012707 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701331-03A Date of Collection: NA Date of Analysis: 1/27/17 12:44 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: a012707 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701331-03A Date of Collection: NA Date of Analysis: 1/27/17 12:44 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 101 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701331-04A File Name: a012702 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 103 99 109 100 103 96 98 100 99 96 98 104 103 98 94 104 95 97 98 98 95 98 101 99 93 95 95 99 93 105 94 92 95 95 99 102 96 96 89 83 86 88 Date of Collection: NA Date of Analysis: 1/27/17 08:36 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701331-04A File Name: a012702 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 88 88 86 86 87 88 87 87 86 88 86 86 84 85 87 85 87 85 83 84 Date of Collection: NA Date of Analysis: 1/27/17 08:36 AM 102 70-130 101 70-130 102 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701331-05A File Name: a012703 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/27/17 09:01 AM 94 70-130 92 70-130 102 70-130 95 70-130 92 70-130 91 70-130 92 70-130 92 70-130 85 70-130 89 70-130 89 70-130 94 70-130 96 70-130 91 70-130 92 70-130 93 70-130 90 70-130 98 70-130 93 70-130 89 70-130 91 70-130 83 70-130 95 70-130 91 70-130 87 70-130 91 70-130 91 70-130 94 70-130 89 70-130 97 70-130 93 70-130 91 70-130 90 70-130 95 70-130 95 70-130 102 70-130 95 70-130 93 70-130 88 70-130 82 70-130 83 70-130 91 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701331-05A File Name: a012703 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/27/17 09:01 AM 86 70-130 85 70-130 84 70-130 86 70-130 86 70-130 87 70-130 89 70-130 88 70-130 83 70-130 87 70-130 86 70-130 86 70-130 83 70-130 85 70-130 87 70-130 85 70-130 89 70-130 84 70-130 83 70-130 82 70-130 100 70-130 99 70-130 103 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701331-05AA File Name: a012704 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/27/17 09:26 AM 93 70-130 92 70-130 101 70-130 93 70-130 89 70-130 90 70-130 92 70-130 92 70-130 77 70-130 87 70-130 88 70-130 93 70-130 93 70-130 90 70-130 93 70-130 92 70-130 90 70-130 98 70-130 92 70-130 88 70-130 89 70-130 81 70-130 96 70-130 91 70-130 87 70-130 89 70-130 90 70-130 92 70-130 88 70-130 99 70-130 92 70-130 90 70-130 93 70-130 96 70-130 95 70-130 103 70-130 96 70-130 92 70-130 87 70-130 84 70-130 84 70-130 91 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701331-05AA File Name: a012704 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/27/17 09:26 AM 88 70-130 85 70-130 86 70-130 87 70-130 87 70-130 88 70-130 90 70-130 90 70-130 85 70-130 88 70-130 86 70-130 89 70-130 82 70-130 86 70-130 87 70-130 86 70-130 90 70-130 85 70-130 85 70-130 87 70-130 102 70-130 98 70-130 Page 16 of 16

2/7/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701388 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/27/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701388 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/27/2017 DATE COMPLETED: 02/03/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 6.7 "Hg 4.9 psi 02A Alluvium TO-15 4.9 "Hg 4.8 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 02/07/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701388 Two 6 Liter Summa Canister samples were received on January 27, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701388-01A Ethanol Acetone 2-Propanol 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene m,p-xylene 3.4 11 6.5 20 8.6 20 20 47 3.4 7.6 8.4 19 3.4 6.0 10 18 0.86 1.5 3.4 5.9 0.86 6.1 4.7 33 0.86 18 4.6 96 0.86 2.5 4.7 14 0.86 11 5.8 76 0.86 1.0 3.7 4.3 Client Sample ID: Alluvium Lab ID#: 1701388-02A Ethanol Acetone 2-Propanol 2-Butanone (Methyl Ethyl Ketone) Tetrahydrofuran 1,1,1-Trichloroethane Benzene Trichloroethene Tetrachloroethene 3.2 10 6.0 19 7.9 8.2 19 20 3.2 3.6 7.8 8.9 3.2 3.5 9.3 10 0.79 0.79 2.3 2.3 0.79 1.2 4.3 6.6 0.79 1.2 2.5 3.8 0.79 6.9 4.2 37 0.79 3.8 5.4 26 Page 4 of 16

File Name: 17013127 Dil. Factor: 1.72 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701388-01A Date of Collection: 1/20/17 11:00:00 AM Date of Analysis: 2/1/17 02:21 AM 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 6.0 Not Detected 8.6 Not Detected 18 Not Detected 0.86 Not Detected 2.2 Not Detected 0.86 Not Detected 1.9 Not Detected 8.6 Not Detected 33 Not Detected 3.4 Not Detected 9.1 Not Detected 0.86 Not Detected 4.8 Not Detected 3.4 11 6.5 20 0.86 Not Detected 6.6 Not Detected 0.86 Not Detected 3.4 Not Detected 8.6 20 20 47 3.4 7.6 8.4 19 3.4 Not Detected 11 Not Detected 3.4 Not Detected 11 Not Detected 8.6 Not Detected 30 Not Detected 3.4 Not Detected 12 Not Detected 0.86 Not Detected 3.4 Not Detected 0.86 Not Detected 3.0 Not Detected 0.86 Not Detected 3.5 Not Detected 3.4 6.0 10 18 0.86 1.5 3.4 5.9 0.86 Not Detected 2.5 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 6.1 4.7 33 0.86 Not Detected 3.0 Not Detected 0.86 Not Detected 5.4 Not Detected 0.86 Not Detected 4.0 Not Detected 0.86 Not Detected 2.7 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 18 4.6 96 0.86 Not Detected 4.0 Not Detected 3.4 Not Detected 12 Not Detected 0.86 Not Detected 5.8 Not Detected 0.86 Not Detected 3.9 Not Detected 0.86 Not Detected 3.5 Not Detected 0.86 Not Detected 3.2 Not Detected 0.86 Not Detected 3.9 Not Detected 0.86 2.5 4.7 14 0.86 11 5.8 76 3.4 Not Detected 14 Not Detected Page 5 of 16

File Name: 17013127 Dil. Factor: 1.72 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701388-01A Date of Collection: 1/20/17 11:00:00 AM Date of Analysis: 2/1/17 02:21 AM 0.86 Not Detected 7.3 Not Detected 0.86 Not Detected 6.6 Not Detected 0.86 Not Detected 4.0 Not Detected 0.86 Not Detected 3.7 Not Detected 0.86 1.0 3.7 4.3 0.86 Not Detected 3.7 Not Detected 0.86 Not Detected 3.7 Not Detected 0.86 Not Detected 8.9 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 5.9 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 4.2 Not Detected 0.86 Not Detected 5.2 Not Detected 0.86 Not Detected 5.2 Not Detected 0.86 Not Detected 4.4 Not Detected 0.86 Not Detected 5.2 Not Detected 3.4 Not Detected 26 Not Detected 3.4 Not Detected 37 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 100 70-130 100 70-130 98 70-130 Page 6 of 16

File Name: 17013128 Dil. Factor: 1.58 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701388-02A Date of Collection: 1/20/17 11:15:00 AM Date of Analysis: 2/1/17 02:49 AM 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.5 Not Detected 7.9 Not Detected 16 Not Detected 0.79 Not Detected 2.0 Not Detected 0.79 Not Detected 1.7 Not Detected 7.9 Not Detected 31 Not Detected 3.2 Not Detected 8.3 Not Detected 0.79 Not Detected 4.4 Not Detected 3.2 10 6.0 19 0.79 Not Detected 6.0 Not Detected 0.79 Not Detected 3.1 Not Detected 7.9 8.2 19 20 3.2 3.6 7.8 8.9 3.2 Not Detected 9.8 Not Detected 3.2 Not Detected 9.9 Not Detected 7.9 Not Detected 27 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 3.1 Not Detected 0.79 Not Detected 2.8 Not Detected 0.79 Not Detected 3.2 Not Detected 3.2 3.5 9.3 10 0.79 Not Detected 3.1 Not Detected 0.79 0.79 2.3 2.3 0.79 Not Detected 3.8 Not Detected 0.79 1.2 4.3 6.6 0.79 Not Detected 2.7 Not Detected 0.79 Not Detected 5.0 Not Detected 0.79 Not Detected 3.7 Not Detected 0.79 1.2 2.5 3.8 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 6.9 4.2 37 0.79 Not Detected 3.6 Not Detected 3.2 Not Detected 11 Not Detected 0.79 Not Detected 5.3 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.2 Not Detected 0.79 Not Detected 3.0 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 4.3 Not Detected 0.79 3.8 5.4 26 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: 17013128 Dil. Factor: 1.58 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701388-02A Date of Collection: 1/20/17 11:15:00 AM Date of Analysis: 2/1/17 02:49 AM 0.79 Not Detected 6.7 Not Detected 0.79 Not Detected 6.1 Not Detected 0.79 Not Detected 3.6 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 3.4 Not Detected 0.79 Not Detected 8.2 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 5.4 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 3.9 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.8 Not Detected 0.79 Not Detected 4.1 Not Detected 0.79 Not Detected 4.7 Not Detected 3.2 Not Detected 23 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 101 70-130 101 70-130 98 70-130 Page 8 of 16

File Name: 17013109 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701388-03A Date of Collection: NA Date of Analysis: 1/31/17 04:09 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: 17013109 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701388-03A Date of Collection: NA Date of Analysis: 1/31/17 04:09 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 103 70-130 102 70-130 94 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701388-04A File Name: 17013102 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 105 104 116 117 114 109 115 107 110 100 109 114 121 113 116 117 110 108 121 116 113 112 121 112 104 112 104 114 96 111 112 106 111 106 109 111 110 105 112 106 102 112 Date of Collection: NA Date of Analysis: 1/31/17 09:51 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701388-04A File Name: 17013102 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 106 108 103 108 106 109 112 108 108 109 106 105 104 107 105 105 111 103 106 103 Date of Collection: NA Date of Analysis: 1/31/17 09:51 AM 101 70-130 103 70-130 100 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701388-05A File Name: 17013103 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/31/17 10:18 AM 102 70-130 118 70-130 116 70-130 109 70-130 106 70-130 112 70-130 102 70-130 95 70-130 95 70-130 107 70-130 122 70-130 111 70-130 117 70-130 112 70-130 106 70-130 115 70-130 118 70-130 110 70-130 110 70-130 98 70-130 117 70-130 105 70-130 100 70-130 108 70-130 100 70-130 110 70-130 94 70-130 105 70-130 116 70-130 106 70-130 110 70-130 108 70-130 110 70-130 117 70-130 111 70-130 109 70-130 100 70-130 114 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701388-05A File Name: 17013103 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/31/17 10:18 AM 105 70-130 106 70-130 101 70-130 107 70-130 105 70-130 108 70-130 111 70-130 109 70-130 106 70-130 105 70-130 107 70-130 108 70-130 102 70-130 112 70-130 102 70-130 101 70-130 101 70-130 101 70-130 102 70-130 100 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701388-05AA File Name: 17013104 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 1/31/17 10:45 AM 102 70-130 119 70-130 116 70-130 107 70-130 109 70-130 113 70-130 103 70-130 95 70-130 96 70-130 106 70-130 107 70-130 121 70-130 111 70-130 117 70-130 113 70-130 106 70-130 115 70-130 120 70-130 112 70-130 112 70-130 100 70-130 120 70-130 107 70-130 101 70-130 109 70-130 102 70-130 110 70-130 94 70-130 107 70-130 113 70-130 107 70-130 109 70-130 108 70-130 108 70-130 117 70-130 110 70-130 102 70-130 109 70-130 100 70-130 116 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701388-05AA File Name: 17013104 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 1/31/17 10:45 AM 105 70-130 106 70-130 101 70-130 107 70-130 108 70-130 110 70-130 109 70-130 105 70-130 105 70-130 107 70-130 108 70-130 102 70-130 106 70-130 113 70-130 102 70-130 103 70-130 102 70-130 100 70-130 103 70-130 101 70-130 Page 16 of 16

2/7/2017 Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan MN 55121 Project Name: Shoreham Yards Project #: Workorder #: 1701387 Dear Mr. Brian Deering The following report includes the data for the above referenced project for sample(s) received on 1/27/2017 at Air Toxics Ltd. The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative. Thank you for choosing Eurofins Air Toxics Inc. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Ausha Scott at 916-985-1000 if you have any questions regarding the data in this report. Regards, Ausha Scott Project Manager Page 1 of 16

WORK ORDER #: 1701387 Work Order Summary CLIENT: PHONE: FAX: Mr. Brian Deering Groundwater & Environmental Services, Inc. (GES) 1285 Corporate Center Drive Suite 120 Eagan, MN 55121 800-735-1077 651-405-1036 DATE RECEIVED: 01/27/2017 DATE COMPLETED: 02/07/2017 BILL TO: PROJECT # CONTACT: Accounts Payable Groundwater & Environmental Services, Inc. (GES) 1350 Blair Drive, Suite A Odenton, MD 21113 P.O. # 3501743 Shoreham Yards Ausha Scott RECEIPT FRACTION # NAME TEST VAC./PRES. FINAL PRESSURE 01A Till TO-15 4.3 "Hg 4.9 psi 02A Alluvium TO-15 4.7 "Hg 5.1 psi 03A Lab Blank TO-15 NA NA 04A CCV TO-15 NA NA 05A LCS TO-15 NA NA 05AA LCSD TO-15 NA NA CERTIFIED BY: DATE: 02/07/17 Technical Director Certification numbers: AZ Licensure AZ0775, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-16-11, UT NELAP CA0093332016-7, VA NELAP - 8113, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005, Effective date: 10/18/2016, Expiration date: 10/17/2017. Eurofins Air Toxics Inc.. certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, Inc. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630 (916) 985-1000. (800) 985-5955. FAX (916) 985-1020 Page 2 of 16

LABORATORY NARRATIVE EPA TO-15 Groundwater & Environmental Services, Inc. (GES) Workorder# 1701387 Two 6 Liter Summa Canister samples were received on January 27, 2017. The laboratory performed analysis via EPA TO-15 using GC/MS in the full scan mode. This workorder was independently validated prior to submittal using 'USEPA National Functional Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project quality control requirements and verification of all quantified amounts. Receiving Notes There were no receiving discrepancies. Analytical Notes There were no analytical discrepancies. Definition of Data Qualifying Flags Eight qualifiers may have been used on the data analysis sheets and indicates as follows: B - present in laboratory blank greater than reporting limit (background subtraction not performed). J - Estimated value. E - Exceeds instrument calibration range. S - Saturated peak. Q - Exceeds quality control limits. U - analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition. UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence. File extensions may have been used on the data analysis sheets and indicates as follows: a-file was requantified b-file was quantified by a second column and detector r1-file was requantified for the purpose of reissue Page 3 of 16

Summary of Detected s Client Sample ID: Till Lab ID#: 1701387-01A cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.78 1.2 3.1 4.9 0.78 4.4 4.2 24 0.78 12 4.2 65 0.78 1.6 4.2 8.7 0.78 8.0 5.3 55 Client Sample ID: Alluvium Lab ID#: 1701387-02A Freon 12 Hexane cis-1,2-dichloroethene 1,1,1-Trichloroethane Trichloroethene 1,1,2-Trichloroethane Tetrachloroethene 0.80 1.0 4.0 5.2 0.80 0.88 2.8 3.1 0.80 1.5 3.2 6.1 0.80 3.8 4.4 21 0.80 25 4.3 130 0.80 0.83 4.4 4.5 0.80 9.2 5.4 62 Page 4 of 16

File Name: a020217 Dil. Factor: 1.56 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Till Lab ID#: 1701387-01A Date of Collection: 1/24/17 10:00:00 AM Date of Analysis: 2/2/17 10:48 PM 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 5.4 Not Detected 7.8 Not Detected 16 Not Detected 0.78 Not Detected 2.0 Not Detected 0.78 Not Detected 1.7 Not Detected 7.8 Not Detected 30 Not Detected 3.1 Not Detected 8.2 Not Detected 0.78 Not Detected 4.4 Not Detected 3.1 Not Detected 5.9 Not Detected 0.78 Not Detected 6.0 Not Detected 0.78 Not Detected 3.1 Not Detected 7.8 Not Detected 18 Not Detected 3.1 Not Detected 7.7 Not Detected 3.1 Not Detected 9.7 Not Detected 3.1 Not Detected 9.8 Not Detected 7.8 Not Detected 27 Not Detected 3.1 Not Detected 11 Not Detected 0.78 Not Detected 3.1 Not Detected 0.78 Not Detected 2.7 Not Detected 0.78 Not Detected 3.2 Not Detected 3.1 Not Detected 9.2 Not Detected 0.78 1.2 3.1 4.9 0.78 Not Detected 2.3 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 4.4 4.2 24 0.78 Not Detected 2.7 Not Detected 0.78 Not Detected 4.9 Not Detected 0.78 Not Detected 3.6 Not Detected 0.78 Not Detected 2.5 Not Detected 0.78 Not Detected 3.2 Not Detected 0.78 Not Detected 3.2 Not Detected 0.78 12 4.2 65 0.78 Not Detected 3.6 Not Detected 3.1 Not Detected 11 Not Detected 0.78 Not Detected 5.2 Not Detected 0.78 Not Detected 3.5 Not Detected 0.78 Not Detected 3.2 Not Detected 0.78 Not Detected 2.9 Not Detected 0.78 Not Detected 3.5 Not Detected 0.78 1.6 4.2 8.7 0.78 8.0 5.3 55 3.1 Not Detected 13 Not Detected Page 5 of 16

File Name: a020217 Dil. Factor: 1.56 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Till Lab ID#: 1701387-01A Date of Collection: 1/24/17 10:00:00 AM Date of Analysis: 2/2/17 10:48 PM 0.78 Not Detected 6.6 Not Detected 0.78 Not Detected 6.0 Not Detected 0.78 Not Detected 3.6 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.4 Not Detected 0.78 Not Detected 3.3 Not Detected 0.78 Not Detected 8.1 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 5.4 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 3.8 Not Detected 0.78 Not Detected 4.7 Not Detected 0.78 Not Detected 4.7 Not Detected 0.78 Not Detected 4.0 Not Detected 0.78 Not Detected 4.7 Not Detected 3.1 Not Detected 23 Not Detected 3.1 Not Detected 33 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 101 70-130 107 70-130 Page 6 of 16

File Name: a020218 Dil. Factor: 1.60 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Alluvium Lab ID#: 1701387-02A Date of Collection: 1/24/17 10:15:00 AM Date of Analysis: 2/2/17 11:15 PM 0.80 1.0 4.0 5.2 0.80 Not Detected 5.6 Not Detected 8.0 Not Detected 16 Not Detected 0.80 Not Detected 2.0 Not Detected 0.80 Not Detected 1.8 Not Detected 8.0 Not Detected 31 Not Detected 3.2 Not Detected 8.4 Not Detected 0.80 Not Detected 4.5 Not Detected 3.2 Not Detected 6.0 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.2 Not Detected 8.0 Not Detected 19 Not Detected 3.2 Not Detected 7.9 Not Detected 3.2 Not Detected 10 Not Detected 3.2 Not Detected 10 Not Detected 8.0 Not Detected 28 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 0.88 2.8 3.1 0.80 Not Detected 3.2 Not Detected 3.2 Not Detected 9.4 Not Detected 0.80 1.5 3.2 6.1 0.80 Not Detected 2.4 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 3.8 4.4 21 0.80 Not Detected 2.8 Not Detected 0.80 Not Detected 5.0 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 2.6 Not Detected 0.80 Not Detected 3.2 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 25 4.3 130 0.80 Not Detected 3.7 Not Detected 3.2 Not Detected 12 Not Detected 0.80 Not Detected 5.4 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 Not Detected 3.3 Not Detected 0.80 Not Detected 3.0 Not Detected 0.80 Not Detected 3.6 Not Detected 0.80 0.83 4.4 4.5 0.80 9.2 5.4 62 3.2 Not Detected 13 Not Detected Page 7 of 16

File Name: a020218 Dil. Factor: 1.60 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Alluvium Lab ID#: 1701387-02A Date of Collection: 1/24/17 10:15:00 AM Date of Analysis: 2/2/17 11:15 PM 0.80 Not Detected 6.8 Not Detected 0.80 Not Detected 6.1 Not Detected 0.80 Not Detected 3.7 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.5 Not Detected 0.80 Not Detected 3.4 Not Detected 0.80 Not Detected 8.3 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 5.5 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 3.9 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.8 Not Detected 0.80 Not Detected 4.1 Not Detected 0.80 Not Detected 4.8 Not Detected 3.2 Not Detected 24 Not Detected 3.2 Not Detected 34 Not Detected Container Type: 6 Liter Summa Canister Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 108 70-130 Page 8 of 16

File Name: a020206 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Client Sample ID: Lab Blank Lab ID#: 1701387-03A Date of Collection: NA Date of Analysis: 2/2/17 02:42 PM 0.50 Not Detected 2.5 Not Detected 0.50 Not Detected 3.5 Not Detected 5.0 Not Detected 10 Not Detected 0.50 Not Detected 1.3 Not Detected 0.50 Not Detected 1.1 Not Detected 5.0 Not Detected 19 Not Detected 2.0 Not Detected 5.3 Not Detected 0.50 Not Detected 2.8 Not Detected 2.0 Not Detected 3.8 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.0 Not Detected 5.0 Not Detected 12 Not Detected 2.0 Not Detected 4.9 Not Detected 2.0 Not Detected 6.2 Not Detected 2.0 Not Detected 6.3 Not Detected 5.0 Not Detected 17 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.8 Not Detected 0.50 Not Detected 2.0 Not Detected 2.0 Not Detected 5.9 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.5 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 1.7 Not Detected 0.50 Not Detected 3.1 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 1.6 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 2.3 Not Detected 2.0 Not Detected 7.2 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.0 Not Detected 0.50 Not Detected 1.9 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.7 Not Detected 0.50 Not Detected 3.4 Not Detected 2.0 Not Detected 8.2 Not Detected Page 9 of 16

File Name: a020206 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Client Sample ID: Lab Blank Lab ID#: 1701387-03A Date of Collection: NA Date of Analysis: 2/2/17 02:42 PM 0.50 Not Detected 4.2 Not Detected 0.50 Not Detected 3.8 Not Detected 0.50 Not Detected 2.3 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.2 Not Detected 0.50 Not Detected 2.1 Not Detected 0.50 Not Detected 5.2 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 2.4 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 3.0 Not Detected 0.50 Not Detected 2.6 Not Detected 0.50 Not Detected 3.0 Not Detected 2.0 Not Detected 15 Not Detected 2.0 Not Detected 21 Not Detected Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 102 70-130 100 70-130 102 70-130 Page 10 of 16

Client Sample ID: CCV Lab ID#: 1701387-04A File Name: a020202 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone 102 100 108 100 99 92 95 100 94 97 98 100 102 97 95 103 94 99 98 97 94 98 102 99 93 94 96 99 94 106 96 96 98 97 101 101 97 99 93 89 92 91 Date of Collection: NA Date of Analysis: 2/2/17 10:10 AM Page 11 of 16

Client Sample ID: CCV Lab ID#: 1701387-04A File Name: a020202 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene 92 92 92 90 91 91 90 94 90 92 90 90 87 90 93 90 90 92 93 92 Date of Collection: NA Date of Analysis: 2/2/17 10:10 AM 102 70-130 100 70-130 103 70-130 Page 12 of 16

Client Sample ID: LCS Lab ID#: 1701387-05A File Name: a020203 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 2/2/17 10:35 AM 98 70-130 94 70-130 95 70-130 93 70-130 93 70-130 94 70-130 96 70-130 80 70-130 91 70-130 95 70-130 96 70-130 98 70-130 94 70-130 92 70-130 96 70-130 90 70-130 99 70-130 95 70-130 92 70-130 88 70-130 89 70-130 97 70-130 94 70-130 91 70-130 93 70-130 92 70-130 95 70-130 91 70-130 102 70-130 96 70-130 95 70-130 96 70-130 100 70-130 99 70-130 106 70-130 98 70-130 95 70-130 89 70-130 86 70-130 87 70-130 94 70-130 Page 13 of 16

Client Sample ID: LCS Lab ID#: 1701387-05A File Name: a020203 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 2/2/17 10:35 AM 90 70-130 87 70-130 87 70-130 89 70-130 88 70-130 89 70-130 92 70-130 93 70-130 87 70-130 88 70-130 88 70-130 87 70-130 87 70-130 87 70-130 90 70-130 89 70-130 91 70-130 89 70-130 88 70-130 88 70-130 102 70-130 98 70-130 Page 14 of 16

Client Sample ID: LCSD Lab ID#: 1701387-05AA File Name: a020204 Dil. Factor: 1.00 Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-dichloropropene 1,1,2-Trichloroethane Tetrachloroethene 2-Hexanone Date of Collection: NA Date of Analysis: 2/2/17 11:00 AM 99 70-130 95 70-130 106 70-130 98 70-130 94 70-130 94 70-130 96 70-130 96 70-130 86 70-130 93 70-130 95 70-130 94 70-130 100 70-130 94 70-130 93 70-130 100 70-130 91 70-130 103 70-130 96 70-130 93 70-130 95 70-130 87 70-130 101 70-130 95 70-130 92 70-130 92 70-130 94 70-130 98 70-130 89 70-130 100 70-130 93 70-130 92 70-130 91 70-130 96 70-130 97 70-130 98 70-130 94 70-130 89 70-130 85 70-130 87 70-130 94 70-130 Page 15 of 16

Client Sample ID: LCSD Lab ID#: 1701387-05AA File Name: a020204 Dil. Factor: 1.00 Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethyl Benzene m,p-xylene o-xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Container Type: NA - Not Applicable Surrogates Toluene-d8 1,2-Dichloroethane-d4 4-Bromofluorobenzene Date of Collection: NA Date of Analysis: 2/2/17 11:00 AM 90 70-130 87 70-130 89 70-130 89 70-130 88 70-130 89 70-130 92 70-130 93 70-130 87 70-130 89 70-130 89 70-130 92 70-130 86 70-130 89 70-130 90 70-130 89 70-130 93 70-130 88 70-130 90 70-130 91 70-130 100 70-130 98 70-130 Page 16 of 16

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