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Home My WebLink AboutMO-6731_27502_CA_LTRRPT_20201228_Groundwater Monitoring Letter ReportExcel Civil & Environmental Associates, PLLC 625 Huntsman Court Gastonia, North Carolina 28054 NC License No. P-0129 Telephone:(704) 853-0800 Facsimile:(704) 853-3949 Internet: www.excelenar.com December 28, 2020 Ms. Trudy Beverly, L.G. NCDEQ/MRO/DWM 610 East Center Avenue Mooresville, North Carolina 28115 Re: Groundwater Sampling Letter Report (Former) SERVCO No. 00311 24 North Church Street Concord, North Carolina Risk Classification: High (H155) Land Use: Residential MO-6731 _27502_CA_20201228_Letter_Re port ECEA Project No. 23056 Dear Ms. Beverly: Excel Civil & Environmental Associates, PLLC (Excel) submits for your review and approval this Groundwater Sampling Letter Report for the above -referenced facility. As per the approved scope of work, Excel obtained groundwater samples from monitoring wells MW- 8, MW-9 and MW-10R on December 2, 2020. Laboratory analytical data indicates that overall dissolved phase hydrocarbon constituents continues to occur at the site and are decreasing with some seasonal fluctuations. Remaining constituent levels exceed NCAC 2L standards for all three monitoring wells for various constituents and at MW-1 OR exceed NCAC 2B standards for toluene. At this time, we recommend a fate and transport study be conducted to evaluate impact to nearby receptors and a pathway towards incident closure. If you have any questions, please contact me. Sincerely yours, EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC M.T. Stanforth, P.E. Principal Engineer p.c. Bob Gresham — SERVCO, Albemarle, NC TABLE 1 MONITOR WELL CONSTRUCTION AND LIQUID LEVEL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Top of Casing (ft.) Total Well Depth (ft.) Screen Interval (ft.) Depth to Product (ft.) Depth to Water (ft.) Product Thickness (ft.) Water Table Elevation (ft.) MW-1 100.00 45' 20'- 45' -- NS -- -- M W -2 99.63 44' 19' - 44' -- NS -- -- MW-3 1 99.34 43' 18' - 43' -- NS -- MW-4 100.10 45' 20'- 45' -- NS -- -- MW-5 99.97 45' 20'- 45' -- NS -- -- MW-6 99.22 40' 20'- 40' -- NS -- -- MW-7 1 91.79 37' 17' - 37' -- NS -- -- MW-8 99.28 49' 29' - 49' -- 33.90 -- 65.38 MW-9 80.24 26' 11' - 26' 15.80 64.44 MW-10R 79.44 30' 20'- 30' -- 14.56 -- 64.88 MW-11 1 68.94 20' 10' - 20' -- NS -- -- MW-12 72.04 22' 12' - 22' -- NS -- -- MW-13 70.44 25' 10' - 25' -- NS -- -- MW-14 71.74 25' 10' - 25' -- NS -- -- VW-1 -- 65' 60' - 65' -- NS -- -- VW-2 -- 61' 56' - 61' -- NS -- -- NOTES: Groundwater measurements collected December 2, 2020 ft. - feet NL - Not Located NS - Not Sampled If necessary water table elevations adjusted to account for the presence of Free Product using the following formula: WTE = TOC — (DTW — (Product Thickness " 0.75)) TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v w y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 07/02/03 1,300 140 140 580 1,800 78 82 NA 88 03/12/07 680 < 50 < 10 12 1,300 51 NA 55 < 1 09/18/08 < 1 < 5 < 1 < 3 < 1 < 1 NA 1.1 < 1 11/03/09 240 17 4.8 30 640 22 NA 22 < 1 05/27/10 170 15 8.4 39 650 17 NA 4 < 5 11/04/10 36 < 25 < 5 < 15 530 16 NA < 5 < 5 05/11/11 39 < 25 < 5 < 15 500 14 NA 12 < 1 10/11/11 21 < 5 < 1 < 3 170 5 170 4.3 < 1 05/21/12 16 < 5 < 1 1.2 1 230 5.8 7.2 4.6 < 1 12/03/12 NOT SAMPLED - DRY 04/30/13 < 1 < 5 < 1 < 3 47 < 1 < 5 2 < 1 MW-1 10/09/13 1.1 < 5 < 1 < 3 42 < 1 < 5 5.3 < 1 05/14/14 <1 <5 <1 <3 <5 <5 <5 <1 <0.4 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 0.42 J < 0.32 < 1 < 0.37 < 0.4 05/07/15 0.589 J < 0.78 < 0.38 < 1.06 0.449 J < 0.32 < 1 0.541 J < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 1.13 < 0.32 < 1 1.69 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 11/03/16 0.442 J < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 05/04/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 11/09/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.605 J < 0.4 06/28/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.441 J < 0.4 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.01 < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 07/02/03 1,300 80 76 210 1,100 37 110 NA NA 03/12/07 390 48 < 5 59 480 18 NA 8.4 < 5 09/18/08 230 < 100 < 20 20 660 25 NA < 20 < 20 11/03/09 260 < 50 < 10 49 740 22 NA < 10 < 10 05/27/10 210 160 33 216 640 18 NA 3.8 < 1 11/04/10 5.5 < 25 < 5 < 15 500 18 NA < 5 < 5 05/11/11 < 5 < 25 < 5 < 15 580 17 NA < 5 < 5 10/11/11 3.4 < 5 < 1 6 340 14 < 5 4 < 1 05/21/12 < 5 < 25 < 5 < 15 190 6.7 < 25 6.8 < 5 12/03/12 < 1 < 5 < 1 < 3 150 5.3 < 5 5.4 < 1 04/30/13 < 1 < 5 < 1 < 3 76 2.6 1 < 5 5.3 < 1 MW-2 10/09/13 < 1 < 5 < 1 < 3 49 1.6 < 5 4.8 < 1 05/14/14 <1 <5 <1 <3 10 <5 <5 2 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 2.1 < 0.32 < 1 2.1 < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 1.46 < 0.32 < 1 1.11 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.53 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.782 J < 0.4 11 /03/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.27 < 0.4 05/04/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.14 < 0.4 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.06 < 0.4 06/28/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.763 J < 0.4 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.966 J < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.705 J < 0.4 Page 1 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v w y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 08/27/03 7.3 < 5 2 29 360 19 < 10 NA NA 03/12/07 < 1 < 5 < 1 < 3 24 1.6 NA 10 < 1 09/18/08 < 1 < 5 < 1 < 3 9.8 1.2 NA 7.2 < 1 11/03/09 < 1 < 5 < 1 < 3 1.2 < 1 NA 7.2 < 1 05/27/10 < 1 < 5 < 1 < 3 3.1 < 1 NA 5.1 < 1 11/04/10 <1 <5 <1 <3 <1 <1 NA 4.3 <1 05/11/11 <1 <5 <1 <3 1.4 <1 NA 3.5 <1 10/11/11 <1 <5 <1 <3 1.4 <1 <5 5.7 <1 MW-3 05/21/12 <1 <5 <1 <3 <1 <1 <5 1.7 <1 12/03/12 <1 <5 <1 <3 <1 <1 <5 2.2 <1 04/30/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 10/09/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/14/14 <1 <5 <1 <3 <5 <5 <5 <1 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.67 J < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.432 J < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 0.446 J < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 11/03/16 NOT SAMPLED - DAMAGED 08/27/03 24 < 5 < 0.5 < 1.5 7.2 < 5 < 10 NA NA 03/12/07 2.3 < 5 < 1 < 3 2.6 < 1 NA 43 < 1 09/18/08 6,900 20,000 3,600 17,500 < 250 < 250 NA < 250 < 250 11/03/09 < 1 < 5 < 1 < 3 < 1 < 1 NA 41 < 1 05/27/10 < 1 240 < 1 < 3 < 1 < 1 NA 240 < 1 11/04/10 <1 <5 <1 <3 <1 <1 NA 29 <1 05/11/11 <1 <5 <1 <3 9.8 <1 NA 32 <1 10/11/11 <1 <5 <1 <3 <1 <1 <1 11 <1 05/21/12 <1 <5 <1 <3 <1 <1 <5 8.8 <1 12/03/12 <1 <5 <1 <3 <1 <1 <5 10 <1 04/30/13 <1 <5 <1 <3 <1 <1 <5 7.9 <1 MW-4 10/09/13 <1 <5 <1 <3 <1 <1 <5 7.8 <1 05/14/14 <1 <5 <1 <3 <5 <5 <5 6.7 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 6.0 < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 7.39 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 4.84 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 5.23 < 0.4 11 /03/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.69 < 0.4 05/04/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.06 < 0.4 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 2.49 < 0.4 06/28/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.99 < 0.4 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.07 < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.89 < 0.4 Page 2 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v w y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 08/27/03 1,900 < 250 < 25 < 75 2,100 < 250 < 250 NA NA 03/12/07 880 < 500 < 100 < 300 710 < 100 NA < 100 < 100 09/18/08 530 < 50 24 33 950 54 NA 13 < 10 11/03/09 440 < 50 < 10 < 30 1,200 55 NA 18 < 10 05/27/10 320 < 5 1.1 8 810 35 NA 15 4.5 11/04/10 6.2 < 25 < 5 8 770 27 NA 13 5.6 05/11/11 8.3 < 25 < 5 < 15 850 27 NA 14 < 5 10/11/11 < 10 < 50 < 10 < 30 440 12 < 50 23 < 10 05/21/12 8.7 < 25 < 5 < 15 580 17 < 25 17 < 5 12/03/12 < 1 < 5 < 1 < 3 280 7.9 < 5 25 < 1 04/30/13 3.5 < 10 < 2 < 6 360 10 < 10 18 < 2 MW-5 10/09/13 < 2 < 10 < 2 < 6 220 6.9 < 10 23 < 2 05/14/14 <1 <5 <1 <3 180 <5 <5 13 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 39 0.96 J < 1 6.6 < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 52.1 1.17 < 1 4.45 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 5.71 < 0.32 < 1 4.67 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 4.3 < 0.32 < 1 3.2 < 0.4 11 /03/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.54 < 0.4 05/04/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.22 < 0.4 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 3.33 < 0.4 06/28/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 2.06 < 0.4 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.98 < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.36 < 0.4 MW-6 02/26/04 < 1 < 5 < 1 < 2 < 5 < 5 < 5 NA NA 02/26/04 < 1 < 5 < 1 < 2 < 5 < 5 < 5 400 1.3 03/12/07 < 1 < 5 < 1 < 3 < 1 < 1 NA 340 1.2 09/18/08 < 1 < 5 < 1 < 3 < 1 < 1 NA 220 6.6 05/27/10 < 1 < 5 < 1 < 3 < 1 < 1 NA 220 < 1 05/11/11 <2 <10 <2 <6 <2 <2 NA 170 <2 10/11/11 <5 <25 <5 <15 <5 <5 <5 190 <25 05/21/12 <5 <25 <5 <15 <5 <5 <25 64 <5 12/03/12 <1 <5 <1 <3 <1 <1 <5 44 <1 04/30/13 <1 <5 <1 <3 1 <1 <1 <5 68 <1 10/13 - 5/14 NOT LOCATED MW-7 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 8.0 0.57 J 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 9.85 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 11.80 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 5.95 < 0.4 11 /03/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 12.40 < 0.4 05/04/17 < 0.66 < 0.82 < 0.77 < 2.12 < 0.73 < 0.64 < 2 12.40 < 0.8 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < .32 < 1 11.60 < 0.4 06/29/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 10.50 < 0.4 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 12.90 < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 30.80 < 0.4 Page 3 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v w y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 05/13/04 8,700 27,000 9,900 47,000 < 1,000 < 1,000 4,100 NA NA 3/07 - 5/10 NOT SAMPLED - FREE PRODUCT OBSERVED 11/04/10 4,100 17,000 3,100 17,900 < 200 < 200 NA < 200 < 200 05/11/11 2,300 10,000 1,900 15,200 < 100 < 10 NA < 100 < 100 10/11/11 2,100 11,000 3,300 23,800 < 100 < 100 2,100 < 100 < 500 05/21/12 1,400 5,800 3,100 25,500 < 100 < 100 2,600 < 100 < 100 12/03/12 NOT SAMPLED - FREE PRODUCT OBSERVED 04/30/13 320 1,000 1,100 1 7,800 1 < 50 1 < 50 1 1,600 < 50 < 50 10/09/13 NOT SAMPLED - FREE PRODUCT OBSERVED 05/14/14 < 100 < 500 660 6,600 < 500 < 500 940 < 100 < 100 12/29/14 < 16 < 39 91 1,000 < 18 < 16 440 < 19 < 20 MW-8 05/07/15 12.2 J 69.5 J 197 1,452 < 7.3 < 6.4 574 < 7.4 < 8 11/03/15 10.7 118 597 3,690 < 3.67 < 3.2 689 < 3.72 < 3.98 05/10/16 < 33.1 355 J 851 4,520 < 36.7 < 32 799 < 37.2 < 39.8 11/03/16 < 3.31 8.77 J 34.3 706 < 3.67 < 3.2 332 < 3.72 < 3.98 05/04/17 < 3.31 12 81.3 823 < 3.67 < 3.2 551 < 3.72 < 3.98 11/09/17 43.2 5.67 J 128 380 < 3.67 < 3.2 239 < 3.72 < 3.98 06/28/18 < 3.31 < 4.12 5.93 J 78 J < 3.67 < 3.2 92.7 < 3.72 < 3.98 11/06/18 16.6 4.31 118 430 < 3.67 < 3.2 184 < 3.72 < 3.98 05/07/19 41.1 17.8 125 446 < 0.367 < 0.32 277 < 0.372 < 0.398 11/01/19 3.22 1.45 13 123.7 < 0.367 < 0.32 176 < 0.372 < 0.398 05/07/20 20.2 J < 27.8 179 820 < 10.1 < 10.5 378 J < 30.0 < 19.0 J4 12/02/20 12.7 4.02 J 27.8 118 < 1.01 < 1.05 211 < 3 < 1.9 02/26/04 12,000 < 2,500 < 500 < 1,000 4,700 < 2,500 < 2,500 NA NA 03/12/07 32 68 50 360 800 22 NA 20 < 10 09/18/08 27 < 5 < 1 4.9 430 34 NA 21 4 11 /03/09 320 < 25 5.4 17 3,700 180 NA 13 < 50 05/27/10 2,800 < 250 < 50 500 4,900 330 NA < 50 < 50 11/04/10 250 < 120 < 250 < 75 3,100 200 NA < 25 < 25 05/11/11 1,000 < 100 < 20 < 60 3,900 330 NA < 20 < 20 11/15/11 2,000 < 5 < 1 < 3 9,600 67 < 5 20 9.4 05/21/12 120 < 5 < 5 8.5 2,200 110 18 6.6 5.4 12/03/12 34 < 100 < 20 < 60 1,500 71 < 100 < 20 < 20 04/30/13 < 1 < 5 < 1 < 3 37 1.7 < 5 < 1 < 1 10/09/13 2.3 < 5 < 1 < 3 1,500 62 < 5 4.5 3.7 05/14/14 1.1 < 5 < 1 < 3 500 24 < 5 5.7 6.8 MW-9 12/29/14 0.9 J < 1.6 < 0.77 < 2.08 1 160 7.6 4.7 J 2.0 J 1.4 J 05/07/15 NOT SAMPLED - NOT LOCATED 11/03/15 11.9 2.7 J 3.38 5.23 J 437 21.5 22.5 1.79 0.753 J 05/10/16 115 8.4 34.5 13.01 743 27.7 75.3 2.16 < 0.4 11/03/16 4.17 < 0.78 < 0.38 0.446 J 375 12.3 < 1 17.2 2.31 05/04/17 3.22 0.914 J 0.477 J 1.446 J 333 14.2 7.36 5.26 0.883 J 11/09/17 10.9 < 0.41 < 0.38 1.42 186 6.79 1.07 J 4.68 1.02 06/29/18 0.607 J < 0.41 < 0.38 1 < 1.06 165 4.68 < 1 2.89 < 0.4 11/06/18 1.45 0.766 J 1.06 1.287 J 132 4.26 1.17 J 1.22 < 0.398 05/08/19 1.15 < 0.41 < 0.384 < 1.06 50.7 1.06 < 1 1.67 0.671 J 11/01/19 0.652 J < 0.41 < 0.384 < 1.06 53.3 1.31 < 1 0.701 J < 0.398 05/07/20 0.169 J < 0.278 < 0.137 < 0.256 J 5.75 0.123 J < 1 0.715 J < 0.190 J4 12/02/20 1.36 < 0.278 < 0.137 < 0.604 6.51 0.179 J < 1 J4 0.618 J < 0.19 Page 4 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 02/26/04 12,000 24,000 3,900 21,600 2,500 < 2,500 < 2,500 NA < 200 03/12/07 13,000 19,000 2,200 13,000 1,000 < 200 NA < 200 < 2,500 09/18/08 13,000 22,000 4,000 23,200 3,200 < 2,500 NA < 2,500 < 200 11/03/09 NOT SAMPLED - FREE PRODUCT OBSERVED MW-10 05/27/10 11,000 12,000 2,000 17,500 450 < 200 NA < 200 < 200 11/04/10 7,400 8,000 1,400 11,000 650 < 200 NA < 200 < 50 05/11/11 5,400 3,900 1,100 7,400 820 57 NA < 50 < 1 10/11/11 30 27 5.7 48 2.5 < 1 < 1 < 1 < 25 5/12 - 12/12 NOT SAMPLED - DAMAGED 04/30/13 1 1,900 600 580 1,870 450 30 170 < 25 < 25 10/09/13 3,600 1,700 1,300 4,900 630 45 360 < 10 < 10 05/14/14 3,200 12,000 2,600 15,800 < 1,200 < 1,200 < 1,200 < 250 < 250 12/29/14 1,800 6,900 2,700 13,800 250 < 8.0 690 < 9.3 < 10 05/07/15 3,700 5,590 1,930 8,290 503 37.4 J 502 < 37 < 40 11/03/15 3,630 4,750 1,950 8,430 512 31.3 J 488 < 18.6 < 19.9 05/10/16 781 4,640 1,460 11,120 57.4 < 8 673 < 9.3 < 9.95 11/03/16 1,370 1,570 853 3,890 238 < 32 396 J < 37.2 < 39.8 MW-10R 05/04/17 3,510 2,150 1,840 6,730 257 28.1 531 < 9.3 < 9.95 11/09/17 1,170 1,530 1,170 3,820 235 14.1 289 < 9.3 < 9.95 06/28/18 1,470 422 1,310 3,036 118 9.84 J 262 < 7.4 < 7.96 11/06/18 932 2,980 1,800 10,780 24.9 < 0.256 591 < 0.372 < 0.398 05/08/19 145 2,100 1,820 13,390 < 18.4 < 16 690 < 18.6 < 19.9 11/01/19 161 170 443 998 16.6 1.37 128 < 0.372 < 0.398 05/07/20 161 2,270 2,100 14,050 < 1.01 1.05 642 < 3 < 1.90 J4 12/02/20 924 2,560 2,870 13,800 66.4 J < 10.5 808 < 30 < 19 05/13/04 < 0.5 < 5 < 0.5 < 1.5 < 5 < 5 < 5 NA NA 11/04/10 <1 <5 <1 <3 <1 <1 NA <1 <1 05/11/11 1 <5 <1 <3 <1 <1 NA <1 <1 10/11/11 <1 <5 <1 <3 <1 <1 <5 1.8 <1 05/21/12 <1 <5 <1 <3 <1 <1 <5 1.2 <1 12/03/12 <1 <5 <1 <3 <1 <1 <5 2.9 <1 MW-11 04/30/13 < 1 < 5 < 1 < 3 < 1 < 1 < 5 1.1 < 1 10/10/13 <1 <5 <1 <3 <1 <1 <5 2.5 <1 05/14/14 <1 <5 <1 <3 <5 <5 <5 2.4 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 2.4 0.5 J 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 1.95 0.524 J 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 2.38 0.726 J 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 2.25 0.63 J 11/16 - 5/19 NOT SAMPLED - NOT PART OF SCOPE OF WORK Page 5 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O 00 y O F C N t w G1 C X c W m a O N f0 i t Z d r O o L ` v w y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 26 or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 05/13/04 240 < 25 < 2.5 < 7.5 1,800 72 < 25 NA NA 03/12/07 < 1 < 5 < 1 < 3 14 8.4 NA 86 2.2 09/18/08 < 10 < 50 < 10 < 30 470 32 NA < 10 < 10 11/03/09 NOT SAMPLED - NOT LOCATED 05/27/10 < 1 < 5 < 1 < 3 30 13 NA < 1 < 1 11/04/10 < 5 < 25 < 5 < 15 190 17 NA < 5 < 5 05/11/11 38 24 8.5 62 35 18 NA < 1 < 1 10/11/11 < 1 < 5 < 1 < 3 260 24 8.9 < 1 < 5 05/21/12 <1 <5 <1 <3 210 35 <5 <1 <1 12/03/12 < 1 < 5 < 1 < 3 760 76 < 5 1.2 < 1 04/30/13 < 1 < 5 < 1 < 3 70 27 < 5 < 1 < 1 MW-12 10/10/13 < 1 < 5 < 1 < 3 290 27 < 5 < 1 < 1 05/14/14 <1 <5 <1 <3 <5 <5 <5 80 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 42 18 < 1 < 0.37 < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 158 15.2 < 1 < 0.37 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 327 29.5 < 1 < 0.37 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 103 8.11 < 1 < 0.37 < 0.4 11/03/16 < 0.33 < 0.78 < 0.38 < 1.06 81.6 16.3 < 1 < 0.37 < 0.4 05/04/17 < 0.33 < 0.41 < 0.38 < 1.06 12.5 3.65 < 1 < 0.37 < 0.4 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 11.6 4.04 < 1 < 0.37 < 0.4 06/29/18 < 0.33 < 0.41 < 0.38 < 1.06 1.32 0.497 J < 1 34.4 0.481 J 11 /06/18 < 0.33 < 0.41 < 0.38 < 1.06 14 0.955 J < 1 < 0.37 < 0.4 05/07/19 < 0.33 < 0.41 < 0.38 < 1.06 5 0.817 J < 1 < 0.37 < 0.4 06/24/04 < 0.5 < 5 < 0.5 < 1.5 < 1 < 1 < 5 NA NA 11/04/10 < 1 < 5 <1 < 3 <1 < 1 NA <1 <1 05/11/11 <1 <5 <1 <3 <1 <1 NA <1 <1 10/11/11 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/21/12 <1 <5 <1 <3 <1 <1 <5 <1 <1 12/03/12 <1 <5 <1 <3 <1 <1 <5 <1 <1 04/30/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 MW-13 10/10/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/14/14 <1 <5 <1 <3 <5 <5 <5 <1 <1 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.37 < 0.4 11/16 - 5/19 NOT SAMPLED - NOT PART OF SCOPE OF WORK Page 6 of 7 TABLE 2 SUMMARY OF GROUNDWATER ANALYTICAL DATA (Former) Servco No. 00311 Concord, North Carolina Excel Project No. 23056 Well ID Sample Date N O m y O F C N t w G1 C X c t- W m a O N f0 i t Z d r O o L ` v F y t N ° O s F- NCAC 2L 1 600 600 500 20 70 6 0.7 3 10xNCAC 2B or GCL 510 110 84,500 85,500 20,000 70,000 6,000 15,000 3,000 06/24/04 1.2 < 5 < 0.5 < 1.5 38 11 < 5 NA NA 03/12/07 < 1 < 5 < 1 < 3 14 8.5 NA 88 2.1 09/18/08 < 1 < 5 < 1 < 3 10 5.8 NA 24 < 1 11/03/09 < 1 < 5 < 1 < 3 11 6 1 NA 25 1.1 05/27/10 < 1 < 5 < 1 < 3 5.6 3.8 NA 93 1 11/04/10 <1 < 5 < 1 < 3 5.2 3.3 NA 98 1.2 05/11/11 2.8 < 5 < 1 4.1 3.6 1.7 NA 120 < 1 10/11/11 <1 < 5 <1 < 3 3.3 1.8 13 63 <1 MW-14 05/21/12 < 1 < 5 < 1 < 3 2.5 1.4 < 5 71 < 1 12/03/12 < 1 < 5 < 1 < 3 4.6 2.1 < 5 75 < 1 04/30/13 < 1 < 5 < 1 < 3 2.1 1.2 < 5 83 < 1 10/10/13 <1 <5 <1 <3 2.4 1.6 <5 78 <1 05/14/14 NOT LOCATED 12/29/14 < 0.33 < 0.78 < 0.38 < 1.06 0.67 J 20 < 1 5.9 1.8 05/07/15 < 0.33 < 0.78 < 0.38 < 1.06 1.6 4.42 < 1 10.9 0.775 J 11 /03/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 0.753 J < 1 0.915 J 0.468 J 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 5.15 1.95 < 1 32.6 1.19 11/16 - 5/19 NOT SAMPLED - NOT PART OF SCOPE OF WORK 09/18/08 <1 <5 <1 <3 <1 <1 NA <1 <1 11/03/09 <1 <5 <1 <3 <1 <1 NA <1 <1 05/27/10 <1 <5 <1 <3 <1 <1 NA <1 <1 11/04/10 <1 <5 <1 <3 <1 <1 NA <1 <1 05/11/11 <1 <5 <1 <3 <1 <1 NA <1 <1 10/1Li1 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/2 1/1 2 <1 <5 <1 <3 <1 <1 <5 <1 <1 12/03/12 NOT SAMPLED - INOPERABLE WS-1 04/30/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 10/10/13 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/14/14 <1 <5 <1 <3 <1 1 <5 <5 <1 <1 12/14 - 11/15 NOT SAMPLED - INOPERABLE 05/10/16 < 0.33 < 0.78 < 0.38 < 1.06 1 < 0.37 1 < 0.32 < 1 < 0.37 < 0.4 11/03/16 NOT SAMPLED - INOPERABLE 11 /09/17 < 0.33 < 0.41 < 0.38 < 1.06 1 < 0.37 1 < 0.32 < 1 < 0.37 < 0.4 6/18 - 11/18 NOT SAMPLED - ACCESS DENIED 05/08/19 < 0.33 < 0.41 < 0.38 1 < 1.06 1 < 0.37 1 < 0.32 1 < 1 < 0.37 < 0.4 NOTES: Data provided in micrograms per liter or µg/L Data in BOLD exceeds NCAC 2L, highlighted data exceeds 10x NCAC 2B NA - Not Analyzed MTBE - Methyl Tert Butyl Ether IPE - Di -Isopropyl Ether PCE - Tetrachloroethene TCE - Trichloroethene NCAC - North Carolina Administrative Code Additional Detections: 12.20 Sampling Event Isopropylbenzene: MW-834.8; MW-1OR 112 n-Propylbenzene: MW-8 98.8; MW-1OR 311 1,2,4-Trimethylbenzene: MW-8 693; MW-1OR 2,470 1,3,5-Trimethylbenzene: MW-8 9.94 J; MW-9 0.104 J; MW-1OR 593 MW-8: n-Butylbenzene 10.5; sec-Butylbenzene 15.8 MW-9: n-Butylbenzene 0.204 J; sec-Butylbenzene 0.336 J, 4-Chlorotoluene 0.121 J, 1,2-Dichlorobenzene 0.2 BJ, 1,3-Dichlorobenzene 0.169 BJ, 1-4-Dichlorobenzene 0.174 BJ, 1,2,3-Trichlorobenzene 0.644 BJJ4 MW-10: p-Isopropyltoluene 33.7 J Page 7 of 7 EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 625 HUNTSMAN COURT GASTONIA, NC 28054 (704) 853-0800 FIGURE 1 - SITE VICINITY MAP Source: U.S.G.S. 7.5 Minute Topographic Map N Concord, NC, Quadrangle, 1987 I ti i COMMERCIAL ' CHURCH NOTES Map adapted from Aerial Photograph & i Cabarrus County Tax Map. j UST - Underground Storage Tank FIRE STATION i ' I ASPHALT i I MW-6( ® I I I i Ws-1 CHURCH I j i I i I i ASPHALT I I I I I i ' ' � All USTs removed on 5/28/03 iMW-13 ASPHALT I I I z I @MW-11 O I � I I _ I C� COMMERCIAL = I I n = I ASPHALT I _ C/) LEGEND -A i MW-8 I I - - - - Property Line (Approximate) I ® MW-IORj------- Right of Way I W� ® GRASS I RESIDENTIAL -------- Former UST Area CANOPY �� I i o� ! Monitoring Well Location MW-5 i I Irrigation Well Location Z I ® i , > m I :MW-3 i �� ? 4-1 W j MW-2 MW-��' MW-9 @MW-14 62.69' MW-12 I MW-4 !� I BRUMLEY AVENUE NE Iv1W-7@) j I j j GRASS I Q I I � � I Q I i > iY 0 o RESIDENTIAL O ' O 3: U Q I � i� i • F��' i . r�� EXCEL CIVIL & ENVIRONMENTAL FIGURE 3 - ASSOCIATES, PLLCOURT POTABLE WELLS MAP 625 HUNTSMAN COURT GASTONIA, NC 28054 (704) 853-0800 Source: Cabarrus County GIS lJ i I COMMERCIAL ' I ' CHURCH NOTES Map adapted from Aerial Photograph & i Cabarrus County Tax Map. UST - Underground Storage Tank i All USTs removed on 5/28/03 :MW-13 ASPHALT Data from liquid levels collected on December 2, 2020 I i I i I i i I ASPHALT I i i MW-6@ I I I CHURCH j I I I ' I j ASPHALT i I I I I ' I � I I I Z I O ®MW-11 I � ; I I C� I COMMERCIAL = I I C, = I ASPHALT I ' Cf) m LEGEND MW-8 65' j 65.38' Property Line (Approximate) MW-10R i 64.88 ! i------- Right of Way GRASS I RESIDENTIAL -------- Former UST Area CANOPY �� I i ow I Water Table Contour Line (Approximate) W-5 I Monitoring Well Location I r------V Irrigation Well Location i MW-3 i ly- VW-1 W MW-2 MW-�� MW-9 i @)MW-14 64.44, MW-4 MW-12 I I (� r L 65 —..�.. _.._. _..—.._.._.._..._. BRUMLEY AVENUE NE MW-7@) j I j i GRASS I Q I I N I I I i Ld > o RESIDENTIAL O ' O 2 N Q i I I ASPHALT I I NS I MW-6: Ws-1 I CHURCH j i I _.._..� i I i ASPHALT I I I I I ASPHALT NOTES Map adapted from Aerial Photograph & Cabarrus County Tax Map. UST - Underground Storage Tank All USTs removed on 5/28/03 Data from samples collected on December 2,2020 I i NS I Z I MW-11 O I � i I 2 I NS C� I COMMERCIAL = I I C LEGEND = i ASPHALT Property Line (Approximate) i ------- --------- m I 12.7 - - Right of Way 924 - - - i MW-8 �j 20,154 i Former UST Area i <30.0 630 i Monitoring Well Location Benzene I w R GRASS MW-10I RESIDENTIAL BTEX CANOPY �> I Constituents Shown MTBE w� NS I I PCE I I O---- -- 5 w Estimated extent of Benzene at 2L i MW-2 MW-1, I MW-3 �& '-1 z i in groundwater NS i ` ¢ : NS MW-14i Ns ---_ _ Estimated extent of naphthalene at 2L i S NS w . MW-9-- _ .�-- in groundwater MW-12 i MW-4 NS V BRUMLEY AVENUE NE 1.36 1.36 6.51 0.618 J w o RESIDENTIAL O O r Q qaceAnalXical o ANALYTICAL REPORT National Center for Testing & Innovation December 16, 2020 Excel Civil & Environmental Associates Sample Delivery Group: L1293430 Samples Received: 12/05/2020 Project Number: 23056 Description: Servco 00311 Concord Report To: Mr. Mike Stanforth 625 Huntsman Court Gastonia, NC 28054 Entire Report Reviewed By: 4�41 Heather J Wagner Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. JEW ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 1 of 24 TABLE OF CONTENTS ONE LAB. NATIONWIDE. Cp: Cover Page 1 Fn Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 FS MW-8 L1293430-01 5 [Cn] MW-9 L1293430-02 7 MW-10R L1293430-03 9 Fr Qc: Quality Control Summary 11 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 11 RC Gl: Glossary of Terms 22 F Al: Accreditations & Locations 23 Sc: Sample Chain of Custody 24 rAl FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 2 of 24 SAMPLE SUMMARY ONE LAB. NATIONWIDE. Collected by Collected date/time Received date/time MW-8 L1293430-01 GW C.Devane 12/02/2016:00 12/05/2008:45 FP1 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time FTC Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1591724 10 12/14/20 23:59 12/14/20 23:59 ADM Mt. Juliet, TN Collected by Collected date/time Received date/time M MW-9 L1293430-02 GW C.DeVane 12/02/2014:50 12/05/2008:45 Method Batch Dilution Preparation Analysis Analyst Location [Cn] date/time date/time Organic Compounds (GC/MS) by Method 6200E-2011 WG1590868 1 12/12/2015:41 12/12/2015:41 DWR Mt. Juliet, TN FSrVolatile Collected by Collected date/time Received date/time 6QC MW-10R L1293430-03 GW C.Devane 12/02/2015:25 12/05/2008:45 Method Batch Dilution Preparation Analysis Analyst Location GI date/time date/time Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1590868 100 12/12/2019:29 12/12/2019:29 DWR Mt. Juliet, TN FAI Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1591760 100 12/15/20 08:49 12/15/20 08:49 JHH Mt. Juliet, TN FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 3 of 24 CASE NARRATIVE ONE LAB. NATIONWIDE. FP1 All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples FTChave been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my FSS knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. FSr FC-1 4�j �GI Heather J Wagner FAI Project Manager FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 4 of 24 MW-8 SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE. Collected date/time: 12/02/20 16:00 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 FP1 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/I ug/I ug/I date /time Acetone U 113 500 10 12/14/2020 23:59 WG1591724 2 TC Acrolein U J4 25.4 500 10 12/14/2020 23:59 WG1591724 Acrylonitrile U 6.71 100 10 12/14/2020 23:59 WG1591724 F Benzene 12.7 0.941 10.0 10 12/14/2020 23:59 WG1591724 Bromobenzene U 1.18 10.0 10 12/14/2020 23:59 WG1591724 Bromodichloromethane U 1.36 10.0 10 12/14/2020 23:59 WG1591724 4 Crl Bromoform U 1.29 10.0 10 12/14/2020 23:59 WG1591724 Bromomethane U 6.05 50.0 10 12/14/2020 23:59 WG1591724 n-Butylbenzene 10.5 1.57 10.0 10 12/14/2020 23:59 WG1591724 sec -Butyl benzene 15.8 1.25 10.0 10 12/14/2020 23:59 WG1591724 ter[-Butylbenzene U 1.27 10.0 10 12/14/2020 23:59 WG1591724 6 QC Carbon tetrachloride U 1.28 10.0 10 12/14/2020 23:59 WG1591724 Chlorobenzene U 1.16 10.0 10 12/14/2020 23:59 WG1591724 GI Chlorodibromomethane U 1.40 10.0 10 12/14/2020 23:59 WG1591724 Chloroethane U 1.92 50.0 10 12/14/2020 23:59 WG1591724 Chloroform U 1.11 50.0 10 12/14/2020 23:59 WG1591724 FAI Chloromethane U 9.60 25.0 10 12/14/2020 23:59 WG1591724 2-Chlorotoluene U 1.06 10.0 10 12/14/2020 23:59 WG1591724 F 4-Chlorotoluene U 1.14 10.0 10 12/14/2020 23:59 WG1591724 1,2-Dibromo-3-Chloropropane U 2.76 50.0 10 12/14/2020 23:59 WG1591724 1,2-Dibromoethane U 1.26 10.0 10 12/14/2020 23:59 WG1591724 Dibromomethane U 1.22 10.0 10 12/14/2020 23:59 WG1591724 1,2-Dichlorobenzene U 1.07 10.0 10 12/14/2020 23:59 WG1591724 1,3-Dichlorobenzene U 1.10 10.0 10 12/14/2020 23:59 WG1591724 1,4-Dichlorobenzene U 1.20 10.0 10 12/14/2020 23:59 WG1591724 Dichlorodifluoromethane U 3.74 50.0 10 12/14/2020 23:59 WG1591724 1,1-Dichloroethane U 1.00 10.0 10 12/14/2020 23:59 WG1591724 1,2-Dichloroethane U 0.819 10.0 10 12/14/2020 23:59 WG1591724 1,1-Dichloroethene U 1.88 10.0 10 12/14/2020 23:59 WG1591724 cis-1,2-Dichloroethene U 1.26 10.0 10 12/14/2020 23:59 WG1591724 trans-1,2-Dichloroethene U 1.49 10.0 10 12/14/2020 23:59 WG1591724 1,2-Dichloropropane U 1.49 10.0 10 12/14/2020 23:59 WG1591724 1,1-Dichloropropene U 1.42 10.0 10 12/14/2020 23:59 WG1591724 1,3-Dichloropropane U 1.10 10.0 10 12/14/2020 23:59 WG1591724 2,2-Dichloropropane U 1.61 10.0 10 12/14/2020 23:59 WG1591724 Di -isopropyl ether U 1.05 10.0 10 12/14/2020 23:59 WG1591724 Ethylbenzene 27.8 1.37 10.0 10 12/14/2020 23:59 WG1591724 Hexachloro-1,3-butadiene U 3.37 10.0 10 12/14/2020 23:59 WG1591724 Isopropylbenzene 34.8 1.05 10.0 10 12/14/2020 23:59 WG1591724 p-Isopropyltoluene U 1.20 10.0 10 12/14/2020 23:59 WG1591724 2-Butanone (MEK) U 11.9 100 10 12/14/2020 23:59 WG1591724 Methylene Chloride U 4.30 50.0 10 12/14/2020 23:59 WG1591724 4-Methyl-2-pentanone (MIBK) U 4.78 100 10 12/14/2020 23:59 WG1591724 Methyl tert-butyl ether U 1.01 10.0 10 12/14/2020 23:59 WG1591724 Naphthalene 211 10.0 50.0 10 12/14/2020 23:59 WG1591724 n-Propylbenzene 98.8 0.993 10.0 10 12/14/2020 23:59 WG1591724 Styrene U 1.18 10.0 10 12/14/2020 23:59 WG1591724 1,1,1,2-Tetrachloroethane U 1.47 10.0 10 12/14/2020 23:59 WG1591724 1,1,2,2-Tetrachloroethane U 1.33 10.0 10 12/14/2020 23:59 WG1591724 Tetrachloroethene U 3.00 10.0 10 12/14/2020 23:59 WG1591724 Toluene 4.02 J 2.78 10.0 10 12/14/2020 23:59 WG1591724 1,2,3-Trichlorobenzene U 2.30 10.0 10 12/14/2020 23:59 WG1591724 1,2,4-Trichlorobenzene U 4.81 10.0 10 12/14/2020 23:59 WG1591724 1,1,1-Trichloroethane U 1.49 10.0 10 12/14/2020 23:59 WG1591724 1,1,2-Trichloroethane U 1.58 10.0 10 12/14/2020 23:59 WG1591724 Trichloroethene U 1.90 10.0 10 12/14/2020 23:59 WG1591724 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 5 of 24 ONE LAB. NATIONWIDE. MW-8 SAMPLE RESULTS - 01 Collected date/time: 12/02/20 16:00 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Analyte Result ug/I Qualifier MDL ug/I RDL ug/I Dilution Analysis date / time Trichlorofluoromethane U 1.60 50.0 10 12/14/2020 23:59 1,2,3-Trichloropropane J 2.37 25.0 10 12/14/2020 23:59 1,2,4-Trimethylbenzene 693 3.22 10.0 10 12/14/2020 23:59 1,3,5-Trimethyl benzene 9.94 J_ 1.04 10.0 10 12/14/2020 23:59 Vinyl chloride U 2.34 10.0 10 12/14/2020 23:59 o-Xylene 57.2 1.74 10.0 10 12/14/2020 23:59 m&p-Xylenes 60.8 4.30 20.0 10 12/14/2020 23:59 (S) Toluene-d8 105 80.0-120 1211412020 23:59 (S) 4-Bromofluorobenzene 103 77.0-126 1211412020 23:59 (S)1,2-Dich/oroethone-d4 102 70.0-130 1211412020 23:59 Batch WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 WG1591724 Fp FTc FS Fn N Fc F, FAI FSC ACCOUNT: PROJECT: SDG: Excel Civil & Environmental Associates 23056 L1293430 DATE/TIME: PAGE: 12/16/20 16:18 6 of 24 MW-9 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE. Collected date/time: 12/02/20 14:50 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Result Analyte ug/I Acetone U Acrolein U Acrylonitrile U Benzene 1.36 Bromobenzene U Bromodichloromethane U Bromoform U Bromomethane U n-Butylbenzene 0.204 sec -Butyl benzene 0.336 ter[-Butylbenzene U Carbon tetrachloride U Chlorobenzene U Chlorodibromomethane U Chloroethane U Chloroform U Chloromethane U 2-Chlorotoluene U 4-Chlorotoluene 0.121 1,2-Dibromo-3-Chloropropane U 1,2-Dibromoethane U Dibromomethane U 1,2-Dichlorobenzene 0.200 1,3-Dichlorobenzene 0.169 1,4-Dichlorobenzene 0.174 Dichlorodifluoromethane U 1,1-Dichloroethane U 1,2-Dichloroethane U 1,1-Dichloroethene U cis-1,2-Dichloroethene U trans-1,2-Dichloroethene U 1,2-Dichloropropane U 1,1-Dichloropropene U 1,3-Dichloropropane U 2,2-Dichloropropane U Di -isopropyl ether 0.179 Ethylbenzene U Hexachloro-1,3-butadiene U Isopropylbenzene U p-Isopropyltoluene U 2-Butanone (MEK) U Methylene Chloride U 4-Methyl-2-pentanone (MIBK) U Methyl tert-butyl ether 6.51 Naphthalene U n-Propylbenzene U Styrene U 1,1,1,2-Tetrachloroethane U 1,1,2,2-Tetrachloroethane U Tetrachloroethene 0.618 Toluene U 1,2,3-Trichlorobenzene 0.644 1,2,4-Trichlorobenzene U 1,1,1-Trichloroethane U 1,1,2-Trichloroethane U Trichloroethene U Qualifier MDL RDL Dilution Analysis Batch ug/I ug/I date / time J J J BJ BJ BJ J J4 J BJJ4 J4 ACCOUNT: Excel Civil & Environmental Associates 11.3 50.0 1 12/12/202015:41 WG1590868 2.54 50.0 1 12/12/202015:41 WG1590868 0.671 10.0 1 12/12/202015:41 WG1590868 0.0941 1.00 1 12/12/202015:41 WG1590868 0.118 1.00 1 12/12/202015:41 WG1590868 0.136 1.00 1 12/12/202015:41 WG1590868 0.129 1.00 1 12/12/202015:41 WG1590868 0.605 5.00 1 12/12/202015:41 WG1590868 0.157 1.00 1 12/12/202015:41 WG1590868 0.125 1.00 1 12/12/202015:41 WG1590868 0.127 1.00 1 12/12/202015:41 WG1590868 0.128 1.00 1 12/12/202015:41 WG1590868 0.116 1.00 1 12/12/202015:41 WG1590868 0.140 1.00 1 12/12/202015:41 WG1590868 0.192 5.00 1 12/12/202015:41 WG1590868 0.111 5.00 1 12/12/202015:41 WG1590868 0.960 2.50 1 12/12/202015:41 WG1590868 0.106 1.00 1 12/12/202015:41 WG1590868 0.114 1.00 1 12/12/202015:41 WG1590868 0.276 5.00 1 12/12/202015:41 WG1590868 0.126 1.00 1 12/12/202015:41 WG1590868 0.122 1.00 1 12/12/202015:41 WG1590868 0.107 1.00 1 12/12/202015:41 WG1590868 0.110 1.00 1 12/12/202015:41 WG1590868 0.120 1.00 1 12/12/202015:41 WG1590868 0.374 5.00 1 12/12/202015:41 WG1590868 0.100 1.00 1 12/12/202015:41 WG1590868 0.0819 1.00 1 12/12/202015:41 WG1590868 0.188 1.00 1 12/12/202015:41 WG1590868 0.126 1.00 1 12/12/202015:41 WG1590868 0.149 1.00 1 12/12/202015:41 WG1590868 0.149 1.00 1 12/12/202015:41 WG1590868 0.142 1.00 1 12/12/202015:41 WG1590868 0.110 1.00 1 12/12/202015:41 WG1590868 0.161 1.00 1 12/12/202015:41 WG1590868 0.105 1.00 1 12/12/202015:41 WG1590868 0.137 1.00 1 12/12/202015:41 WG1590868 0.337 1.00 1 12/12/202015:41 WG1590868 0.105 1.00 1 12/12/202015:41 WG1590868 0.120 1.00 1 12/12/202015:41 WG1590868 1.19 10.0 1 12/12/202015:41 WG1590868 0.430 5.00 1 12/12/202015:41 WG1590868 0.478 10.0 1 12/12/202015:41 WG1590868 0.101 1.00 1 12/12/202015:41 WG1590868 1.00 5.00 1 12/12/202015:41 WG1590868 0.0993 1.00 1 12/12/202015:41 WG1590868 0.118 1.00 1 12/12/202015:41 WG1590868 0.147 1.00 1 12/12/202015:41 WG1590868 0.133 1.00 1 12/12/202015:41 WG1590868 0.300 1.00 1 12/12/202015:41 WG1590868 0.278 1.00 1 12/12/202015:41 WG1590868 0.230 1.00 1 12/12/202015:41 WG1590868 0.481 1.00 1 12/12/202015:41 WG1590868 0.149 1.00 1 12/12/202015:41 WG1590868 0.158 1.00 1 12/12/202015:41 WG1590868 0.190 1.00 1 12/12/202015:41 WG1590868 PROJECT: SDG: DATE/TIME: 23056 L1293430 12/16/20 16:18 FP1 FTc FSS 4 Cn Fc F FAI FSC PAGE: 7 of 24 ONE LAB. NATIONWIDE. MW-9 SAMPLE RESULTS - 02 Collected date/time: 12/02/20 14:50 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Result Qualifier MDL RDL Dilution Analysis Analyte ug/I ug/I ug/I date / time Trichlorofluoromethane U 0.160 5.00 1 12/12/202015:41 1,2,3-Trichloropropane U 0.237 2.50 1 12/12/202015:41 1,2,4-Trimethylbenzene U 0.322 1.00 1 12/12/202015:41 1,3,5-Trimethyl benzene 0.104 J_ 0.104 1.00 1 12/12/202015:41 Vinyl chloride U 0.234 1.00 1 12/12/202015:41 o-Xylene U 0.174 1.00 1 12/12/202015:41 m&p-Xylenes U 0.430 2.00 1 12/12/202015:41 (S) Toluene-d8 99.7 80.0-120 121121202015.41 (S) 4-Bromofluorobenzene 98.6 77.0-126 121121202015:41 (S)1,2-Dich/oroethone-d4 96.2 70.0-130 121121202015.41 Batch WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 Fp FTc FS Fn Fc F, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 8 of 24 MW-10R SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE. Collected date/time: 12/02/20 15:25 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 FP1 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/I ug/I ug/I date /time Acetone U 1130 5000 100 12/12/202019:29 WG1590868 2 TC Acrolein U 254 5000 100 12/12/202019:29 WG1590868 Acrylonitrile U 67.1 1000 100 12/12/202019:29 WG1590868 F Benzene 924 9.41 100 100 12/12/202019:29 WG1590868 Bromobenzene U 11.8 100 100 12/12/202019:29 WG1590868 Bromodichloromethane U 13.6 100 100 12/12/202019:29 WG1590868 4 Crl Bromoform U 12.9 100 100 12/12/202019:29 WG1590868 Bromomethane U 60.5 500 100 12/12/202019:29 WG1590868 n-Butylbenzene U 15.7 100 100 12/12/202019:29 WG1590868 sec -Butyl benzene U 12.5 100 100 12/12/202019:29 WG1590868 ter[-Butylbenzene U 12.7 100 100 12/12/202019:29 WG1590868 6 QC Carbon tetrachloride U 12.8 100 100 12/12/202019:29 WG1590868 Chlorobenzene U 11.6 100 100 12/12/202019:29 WG1590868 �GI Chlorodibromomethane U 14.0 100 100 12/12/202019:29 WG1590868 Chloroethane U 19.2 500 100 12/12/202019:29 WG1590868 Chloroform U 11.1 500 100 12/12/202019:29 WG1590868 FAI Chloromethane U 96.0 250 100 12/12/202019:29 WG1590868 2-Chlorotoluene U 10.6 100 100 12/12/202019:29 WG1590868 F 4-Chlorotoluene U 11.4 100 100 12/12/202019:29 WG1590868 1,2-Dibromo-3-Chloropropane U 27.6 500 100 12/12/202019:29 WG1590868 1,2-Dibromoethane U 12.6 100 100 12/12/202019:29 WG1590868 Dibromomethane U 12.2 100 100 12/12/202019:29 WG1590868 1,2-Dichlorobenzene U 10.7 100 100 12/12/202019:29 WG1590868 1,3-Dichlorobenzene U 11.0 100 100 12/12/202019:29 WG1590868 1,4-Dichlorobenzene U 12.0 100 100 12/12/202019:29 WG1590868 Dichlorodifluoromethane U 37.4 500 100 12/12/202019:29 WG1590868 1,1-Dichloroethane U 10.0 100 100 12/12/202019:29 WG1590868 1,2-Dichloroethane U 8.19 100 100 12/12/202019:29 WG1590868 1,1-Dichloroethene U 18.8 100 100 12/12/202019:29 WG1590868 cis-1,2-Dichloroethene U 12.6 100 100 12/12/202019:29 WG1590868 trans-1,2-Dichloroethene U 14.9 100 100 12/12/202019:29 WG1590868 1,2-Dichloropropane U 14.9 100 100 12/12/202019:29 WG1590868 1,1-Dichloropropene U 14.2 100 100 12/12/202019:29 WG1590868 1,3-Dichloropropane U 11.0 100 100 12/12/202019:29 WG1590868 2,2-Dichloropropane U 16.1 100 100 12/12/202019:29 WG1590868 Di -isopropyl ether U 10.5 100 100 12/12/202019:29 WG1590868 Ethylbenzene 2870 13.7 100 100 12/12/202019:29 WG1590868 Hexachloro-1,3-butadiene U 33.7 100 100 12/12/202019:29 WG1590868 Isopropylbenzene 112 10.5 100 100 12/12/202019:29 WG1590868 p-Isopropyltoluene 33.7 J 12.0 100 100 12/12/202019:29 WG1590868 2-Butanone (MEK) U 119 1000 100 12/12/202019:29 WG1590868 Methylene Chloride U 43.0 500 100 12/12/202019:29 WG1590868 4-Methyl-2-pentanone (MIBK) U 47.8 1000 100 12/12/202019:29 WG1590868 Methyl tert-butyl ether 66.4 J 10.1 100 100 12/12/202019:29 WG1590868 Naphthalene 808 100 500 100 12/15/2020 08:49 WG1591760 n-Propylbenzene 311 9.93 100 100 12/12/202019:29 WG1590868 Styrene U 11.8 100 100 12/12/202019:29 WG1590868 1,1,1,2-Tetrachloroethane U 14.7 100 100 12/12/202019:29 WG1590868 1,1,2,2-Tetrachloroethane U 13.3 100 100 12/12/202019:29 WG1590868 Tetrachloroethene U 30.0 100 100 12/12/202019:29 WG1590868 Toluene 2560 27.8 100 100 12/12/202019:29 WG1590868 1,2,3-Trichlorobenzene U J4 23.0 100 100 12/12/202019:29 WG1590868 1,2,4-Trichlorobenzene U J4 48.1 100 100 12/12/202019:29 WG1590868 1,1,1-Trichloroethane U 14.9 100 100 12/12/202019:29 WG1590868 1,1,2-Trichloroethane U 15.8 100 100 12/12/202019:29 WG1590868 Trichloroethene U 19.0 100 100 12/12/202019:29 WG1590868 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 9 of 24 ONE LAB. NATIONWIDE. MW-10R SAMPLE RESULTS - 03 Collected date/time: 12/02/20 15:25 L1293430 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Analyte Trichlorofluoromethane 1,2,3-Trichloropropane 1,2,4-Tri methyl ben zen e 1,3,5-Trim ethyl benzene Vinyl chloride o-Xylene m&p-Xylenes (S) Toluene-d8 (S) Toluene-d8 (S) 4-Bromof/uorobenzene (S) 4-Bromof/uorobenzene (S) 1,2-Dich/oroethane-d4 (S) 1,2-Dich/oroethane-d4 Result ug/I Qualifier MDL ug/I RDL ug/I Dilution Analysis date / time U 16.0 500 100 12/12/202019:29 U 23.7 250 100 12/12/202019:29 2470 32.2 100 100 12/12/202019:29 593 10.4 100 100 12/12/202019:29 U 23.4 100 100 12/12/202019:29 3820 17.4 100 100 12/12/202019:29 9980 43.0 200 100 12/12/202019:29 119 80.0-120 12112120201919 104 80.0-120 1211512020 08.49 107 77.0-126 12112120201919 105 77.0-126 1211512020 08.49 95.7 70.0-130 12112120201919 101 70.0-130 1211512020 08.49 Batch WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1590868 WG1591760 WG1590868 WG1591760 WG1590868 WG1591760 Fp FTc FS Fn Fc F, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 10 of 24 WG1590868 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1293430-02,03 Method Blank (MB) (MB) R3602819-2 12/12/20 09:08 MB Result MB Qualifier Analyte ug/I Acetone U Acrolein U Acrylonitrile U Benzene U Bromobenzene 0.154 J Bromodichloromethane U Bromoform U Bromomethane U n-Butylbenzene U sec -Butyl benzene U tert-Butylbenzene U Carbon tetrachloride U Chlorobenzene U Chlorodibromomethane U Chloroethane U Chloroform U Chloromethane U 2-Chlorotoluene 0.118 J 4-Chlorotoluene U 1,2-Dibromo-3-Chloropropane U 1,2-Dibromoethane U Dibromomethane U 1,2-Dichlorobenzene 0.214 J 1,3-Dichlorobenzene 0.167 J 1,4-Dichlorobenzene 0.232 J Dichlorodifluoromethane U 1,1-Dichloroethane U 1,2-Dichloroethane U 1,1-Dichloroethene U cis-1,2-Dichloroethene U trans-1,2-Dichloroethene U 1,2-Dichloropropane U 1,1-Dichloropropene U 1,3-Dichloropropane U 2,2-Dichloropropane U Di -isopropyl ether U Ethylbenzene U Hexachloro-1,3-butadiene U Isopropylbenzene U p-Isopropyltoluene U ACCOUNT: Excel Civil & Environmental Associates MB MDL MB RDL ug/I ug/I 11.3 2.54 0.671 0.0941 0.118 0.136 0.129 0.605 0.157 0.125 0.127 0.128 0.116 0.140 0.192 0.111 0.960 0.106 0.114 0.276 0.126 0.122 0.107 0.110 0.120 0.374 0.100 0.0819 0.188 0.126 0.149 0.149 0.142 0.110 0.161 0.105 0.137 0.337 0.105 0.120 50.0 50.0 10.0 1.00 1.00 1.00 1.00 5.00 1.00 1.00 1.00 1.00 1.00 1.00 5.00 5.00 2.50 1.00 1.00 5.00 1.00 1.00 1.00 1.00 1.00 5.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1293430 12/16/20 16:18 11 of 24 FP1 FTC FSS [Cn] FSr �GI FAI FSC WG1590868 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Method Blank (MB) (MB) R3602819-2 12/12/20 09:08 MB Result Analyte ug/I 2-Butanone (MEK) U Methylene Chloride U 4-Methyl-2-pentanone (MIBK) U Methyl tert-butyl ether U Naphthalene U n-Propylbenzene 0.103 Styrene U 1,1,1,2-Tetrachloroethane U 1,1,2,2-Tetrachloroethane U Tetrachloroethene U Toluene U 1,2,3-Trichlorobenzene 0.431 1,2,4-Trichlorobenzene U 1,1,1-Trichloroethane U 1,1,2-Trichloroethane U Trichloroethene U Trichlorofluoromethane U 1,2,3-Trichloropropane U 1,2,4-Trimethylbenzene U 1,3,5-Trimethyl benzene 0.112 Vinyl chloride U o-Xylene U m&p-Xylenes U (S) Toluene-d8 97.8 (S) 4-Bromof/uorobenzene 107 (S) 1,2-Dich/oroethane-d4 99.7 MB Qualifier MB MDL MB RDL ug/I ug/I QUALITY CONTROL SUMMARY 1-1293430-02,03 1.19 10.0 0.430 5.00 0.478 10.0 0.101 1.00 1.00 5.00 J 0.0993 1.00 0.118 1.00 0.147 1.00 0.133 1.00 0.300 1.00 0.278 1.00 J 0.230 1.00 0.481 1.00 0.149 1.00 0.158 1.00 0.190 1.00 0.160 5.00 0.237 2.50 0.322 1.00 J 0.104 1.00 0.234 1.00 0.174 1.00 0.430 2.00 80.0-120 77.0-126 70.0-130 Laboratory Control Sample (LCS) (LCS) R3602819-1 12/12/20 08:27 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/I ug/I % % Acetone 25.0 25.3 101 19.0-160 Acrolein 25.0 34.2 137 10.0-160 Acrylonitrile 25.0 25.7 103 55.0-149 Benzene 5.00 4.62 92.4 70.0-123 Bromobenzene 5.00 4.78 95.6 73.0-121 Bromodichloromethane 5.00 4.69 93.8 75.0-120 Bromoform 5.00 5.51 110 68.0-132 ONE LAB. NATIONWIDE. FP1 FTC FSS 4 Cn FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 12 of 24 WG1590868 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1293430-02,03 Laboratory Control Sample (LCS) FP1(LCS) R3602819-1 12/12/20 08:27 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/I ug/I % % z TC Bromomethane 5.00 4.62 92.4 10.0-160 n-Butylbenzene 5.00 5.02 100 73.0-125 FSS sec -Butyl benzene 5.00 4.39 87.8 75.0-125 tert-Butylbenzene 5.00 3.88 77.6 76.0-124 Carbon tetrachloride 5.00 4.57 91.4 68.0-126 [Cn] Chlorobenzene 5.00 4.80 96.0 80.0-121 Chlorodibromomethane 5.00 4.86 97.2 77.0-125 FSr Chloroethane 5.00 4.75 95.0 47.0-150 Chloroform 5.00 4.73 94.6 73.0-120 Chloromethane 5.00 4.53 90.6 41.0-142 2-Chlorotoluene 5.00 4.73 94.6 76.0-123 4-Chlorotoluene 5.00 4.54 90.8 75.0-122 7G1 1,2-Dibromo-3-Chloropropane 5.00 5.89 118 58.0-134 1,2-Dibromoethane 5.00 4.81 96.2 80.0-122 Dibromomethane 5.00 4.57 91.4 80.0-120 FAI 1,2-Dichlorobenzene 5.00 5.36 107 79.0-121 1,3-Dichlorobenzene 5.00 4.73 94.6 79.0-120 FSC 1,4-Dichlorobenzene 5.00 4.86 97.2 79.0-120 Dichlorodifluoromethane 5.00 4.55 91.0 51.0-149 1,1-Dichloroethane 5.00 4.86 97.2 70.0-126 1,2-Dichloroethane 5.00 4.64 92.8 70.0-128 1,1-Dichloroethene 5.00 4.74 94.8 71.0-124 cis-1,2-Dichloroethene 5.00 4.82 96.4 73.0-120 trans-1,2-Dichloroethene 5.00 5.16 103 73.0-120 1,2-Dichloropropane 5.00 4.51 90.2 77.0-125 1,1-Dichloropropene 5.00 4.48 89.6 74.0-126 1,3-Dichloropropane 5.00 4.95 99.0 80.0-120 2,2-Dichloropropane 5.00 5.06 101 58.0-130 Di -isopropyl ether 5.00 5.02 100 58.0-138 Ethylbenzene 5.00 5.08 102 79.0-123 Hexachloro-1,3-butadiene 5.00 6.15 123 54.0-138 Isopropylbenzene 5.00 5.47 109 76.0-127 p-Isopropyltoluene 5.00 4.99 99.8 76.0-125 2-Butanone (MEK) 25.0 22.8 91.2 44.0-160 Methylene Chloride 5.00 4.75 95.0 67.0-120 4-Methyl-2-pentanone (MIBK) 25.0 26.2 105 68.0-142 Methyl tert-butyl ether 5.00 5.11 102 68.0-125 Naphthalene 5.00 7.52 150 54.0-135 J4 n-Propylbenzene 5.00 5.06 101 77.0-124 Styrene 5.00 5.26 105 73.0-130 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 13 of 24 WG1590868 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1293430-02,03 Laboratory Control Sample (LCS) (LCS) R3602819-1 12/12/20 08:27 Spike Amount Analyte ug/I 1,1,1,2-Tetrachloroethane 5.00 1,1,2,2-Tetrachloroethane 5.00 Tetrachloroethene 5.00 Toluene 5.00 1,2,3-Trichlorobenzene 5.00 1,2,4-Trichlorobenzene 5.00 1,1,1-Trichloroethane 5.00 1,1,2-Trichloroethane 5.00 Trichloroethene 5.00 Trichlorofluoromethane 5.00 1,2,3-Trichloropropane 5.00 1,2,4-Trimethylbenzene 5.00 1,3,5-Trimethyl benzene 5.00 Vinyl chloride 5.00 o-Xylene 5.00 m&p-Xylenes 10.0 (S) Toluene-d8 (S) 4-Bromofluorobenzene (S) 1,2-Dich/oroethane-d4 LCS Result ug/I 5.77 4.90 4.92 4.53 7.03 7.30 4.84 5.08 4.31 4.75 4.89 4.86 4.55 4.72 5.37 9.63 LCS Rec. 115 98.0 98.4 90.6 141 146 96.8 102 86.2 95.0 97.8 97.2 91.0 94.4 107 96.3 103 107 102 Rec. Limits LCS Qualifier 75.0-125 65.0-130 72.0-132 79.0-120 50.0-138 57.0-137 73.0-124 80.0-120 78.0-124 59.0-147 73.0-130 76.0-121 76.0-122 67.0-131 80.0-122 80.0-122 80.0-120 77.0-126 70.0-130 J4 J4 L1295985-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1295985-01 12/12/2011:57 • (MS) R3602819-3 12/12/2013:16 • (MSD) R3602819-4 12/12/2013:37 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Analyte ug/I ug/I ug/I ug/I % % Acetone 25.0 U 32.8 25.9 131 104 Acrolein 25.0 U 101 85.2 404 341 Acrylonitrile 25.0 U 31.0 24.0 124 96.0 Benzene 5.00 U 4.20 3.64 84.0 72.8 Bromobenzene 5.00 U 4.45 3.54 89.0 70.8 Bromodichloromethane 5.00 U 4.71 4.20 94.2 84.0 Bromoform 5.00 U 4.95 4.16 99.0 83.2 Bromomethane 5.00 U 3.57 2.95 71.4 59.0 n-Butylbenzene 5.00 U 5.03 4.01 101 80.2 sec -Butyl benzene 5.00 U 4.48 3.32 89.6 66.4 tert-Butylbenzene 5.00 U 3.98 3.09 79.6 61.8 Carbon tetrachloride 5.00 U 4.37 3.99 87.4 79.8 Chlorobenzene 5.00 U 4.90 4.02 98.0 80.4 Chlorodibromomethane 5.00 U 5.18 4.38 104 87.6 Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits 1 10.0-160 23.5 35 1 10.0-160 J5 J5 17.0 39 1 21.0-160 25.5 32 1 17.0-158 14.3 27 1 30.0-149 22.8 28 1 31.0-150 11.4 27 1 29.0-150 17.3 29 1 10.0-160 19.0 38 1 31.0-150 22.6 30 1 33.0-155 J3 29.7 29 1 34.0-153 25.2 28 1 23.0-159 9.09 28 1 33.0-152 19.7 27 1 37.0-149 16.7 27 FP1 FTc FSS [Cn] FSr �GI FAI [Sc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 14 of 24 WG1590868 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1293430-02,03 ONE LAB. NATIONWIDE. L1295985-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1295985-01 12/12/2011:57 • (MS) R3602819-3 12/12/2013:16 • (MSD) R3602819-4 12/12/2013:37 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Analyte ug/I ug/I ug/I ug/I % % Chloroethane 5.00 U 3.84 3.36 76.8 67.2 Chloroform 5.00 U 4.85 4.21 97.0 84.2 Chloromethane 5.00 U 3.00 2.71 60.0 54.2 2-Chlorotoluene 5.00 U 4.49 3.45 89.8 69.0 4-Chlorotoluene 5.00 U 4.45 3.37 89.0 67.4 1,2-Dibromo-3-Chloropropane 5.00 U 6.26 4.71 125 94.2 1,2-Dibromoethane 5.00 U 5.37 4.22 107 84.4 Dibromomethane 5.00 U 4.88 3.98 97.6 79.6 1,2-Dichlorobenzene 5.00 0.191 5.87 4.26 114 81.4 1,3-Dichlorobenzene 5.00 0.130 4.93 3.64 96.0 70.2 1,4-Dichlorobenzene 5.00 U 5.66 3.97 113 79.4 Dichlorodifluoromethane 5.00 U 3.72 3.51 74.4 70.2 1,1-Dichloroethane 5.00 U 4.49 4.08 89.8 81.6 1,2-Dichloroethane 5.00 U 4.90 3.81 98.0 76.2 1,1-Dichloroethene 5.00 U 3.90 3.40 78.0 68.0 cis-1,2-Dichloroethene 5.00 U 4.59 4.01 91.8 80.2 trans-1,2-Dichloroethene 5.00 U 3.93 3.47 78.6 69.4 1,2-Dichloropropane 5.00 U 4.40 3.79 88.0 75.8 1,1-Dichloropropene 5.00 U 3.53 3.43 70.6 68.6 1,3-Dichloropropane 5.00 U 5.42 4.22 108 84.4 2,2-Dichloropropane 5.00 U 4.76 4.19 95.2 83.8 Di -isopropyl ether 5.00 U 5.24 4.44 105 88.8 Ethylbenzene 5.00 U 4.74 4.15 94.8 83.0 Hexachloro-1,3-butadiene 5.00 U 4.93 3.83 98.6 76.6 Isopropylbenzene 5.00 U 4.07 3.81 81.4 76.2 p-Isopropyltoluene 5.00 U 4.97 3.70 99.4 74.0 2-Butanone (MEK) 25.0 U 31.2 22.5 125 90.0 Methylene Chloride 5.00 U 4.26 3.74 85.2 74.8 4-Methyl-2-pentanone (MIBK) 25.0 U 32.6 23.5 130 94.0 Methyl tert-butyl ether 5.00 U 5.62 4.56 112 91.2 Naphthalene 5.00 U 5.97 4.93 119 98.6 n-Propylbenzene 5.00 0.103 3.94 3.43 76.7 66.5 Styrene 5.00 U 4.23 4.01 84.6 80.2 1,1,1,2-Tetrachloroethane 5.00 U 5.49 4.19 110 83.8 1,1,2,2-Tetrachloroethane 5.00 U 5.25 4.01 105 80.2 Tetrachloroethene 5.00 U 4.10 3.62 82.0 72.4 Toluene 5.00 U 4.18 3.56 83.6 71.2 1,2,3-Trichlorobenzene 5.00 0.528 4.97 4.40 88.8 77.4 1,2,4-Trichlorobenzene 5.00 U 5.43 4.59 109 91.8 1,1,1-Trichloroethane 5.00 U 4.56 4.06 91.2 81.2 Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits 1 10.0-160 13.3 30 1 29.0-154 14.1 28 1 10.0-160 10.2 29 1 32.0-153 26.2 28 1 32.0-150 27.6 28 1 22.0-151 28.3 34 1 34.0-147 24.0 27 1 30.0-151 20.3 27 1 34.0-149 J3 31.8 28 1 36.0-146 J3 30.1 27 1 35.0-142 J3 35.1 27 1 10.0-160 5.81 29 1 25.0-158 9.57 27 1 29.0-151 25.0 27 1 11.0-160 13.7 29 1 10.0-160 13.5 27 1 17.0-153 12.4 27 1 30.0-156 14.9 27 1 25.0-158 2.87 27 1 38.0-147 24.9 27 1 24.0-152 12.7 29 1 21.0-160 16.5 28 1 30.0-155 13.3 27 1 20.0-154 25.1 34 1 28.0-157 6.60 27 1 30.0-154 J3 29.3 29 1 10.0-160 J3 32.4 32 1 23.0-144 13.0 28 1 29.0-160 J3 32.4 29 1 28.0-150 20.8 29 1 12.0-156 19.1 35 1 31.0-154 13.8 28 1 33.0-155 5.34 28 1 36.0-151 26.9 29 1 33.0-150 26.8 28 1 10.0-160 12.4 27 1 26.0-154 16.0 28 1 17.0-150 12.2 36 1 24.0-150 16.8 33 1 23.0-160 11.6 28 FP1 FTc FSS [Cn] FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 15 of 24 WG1590868 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1293430-02,03 L1295985-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) ONE LAB. NATIONWIDE. (OS) L1295985-01 12/12/2011:57 • (MS) R3602819-3 12/12/2013:16 • (MSD) R3602819-4 12/12/2013:37 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte ug/I ug/I ug/I ug/I % % % % % 1,1,2-Trichloroethane 5.00 U 5.70 4.36 114 87.2 1 35.0-147 26.6 27 Trichloroethene 5.00 17.7 21.4 21.4 74.0 74.0 1 10.0-160 0.000 25 Trichlorofluoromethane 5.00 U 4.49 4.16 89.8 83.2 1 17.0-160 7.63 31 1,2,3-Trichloropropane 5.00 U 5.76 4.13 115 82.6 1 34.0-151 J3 33.0 29 1,2,4-Trimethylbenzene 5.00 U 4.83 3.45 96.6 69.0 1 26.0-154 J3 33.3 27 1,3,5-Trimethyl benzene 5.00 0.115 3.92 3.17 76.1 61.1 1 28.0-153 21.2 27 Vinyl chloride 5.00 U 3.42 3.07 68.4 61.4 1 10.0-160 10.8 27 o-Xylene 5.00 U 4.32 4.20 86.4 84.0 1 45.0-144 2.82 26 m&p-Xylenes 10.0 U 9.29 7.53 92.9 75.3 1 43.0-146 20.9 26 (S) Toluene-d8 104 96.9 80.0-120 (S) 4-Bromof/uorobenzene 95.9 100 77.0-126 (S)1,2-Dich/oroethane-d4 102 96.8 70.0-130 FP1 FTc FSS 4 Cn FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 16 of 24 WG1591724 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 L1293430-01 Method Blank (MB) (MB) R3603567-2 12/14/20 22:12 MB Result Analyte ug/I MB Qualifier MB MDL MB RDL ug/I ug/I Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec -Butyl benzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 Chloromethane U 0.960 2.50 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di -isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 ACCOUNT: Excel Civil & Environmental Associates PROJECT: SDG: DATE/TIME: PAGE: 23056 L1293430 12/16/20 16:18 17 of 24 FP1 FTC FSS [Cn] FSr �GI FAI FSC WG1591724 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 L1293430-01 Method Blank (MB) Cp (MB) R3603567-2 12/14/20 22:12 MB Result MB Qualifier MB MDL MB RDL Analyte ug/I ug/I ug/I E 2-Butanone (MEK) U 1.19 10.0 Methylene Chloride U 0.430 5.00 3 SS 4-Methyl-2-pentanone (MIBK) U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 FCn n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 E 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 ce Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 FG I 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 FAI Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 E 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethyl benzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 (S) Toluene-d8 106 80.0-120 (S) 4-Bromof/uorobenzene 102 77.0-126 (S)1,2-Dich/oroethane-d4 102 70.0-130 Laboratory Control Sample (LCS) (LCS) R3603567-1 12/14/20 21:32 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/I ug/I % % Acetone 25.0 27.1 108 19.0-160 Acrolein 25.0 42.1 168 10.0-160 J4 Acrylonitrile 25.0 28.4 114 55.0-149 Benzene 5.00 5.27 105 70.0-123 Bromobenzene 5.00 5.69 114 73.0-121 Bromodichloromethane 5.00 5.35 107 75.0-120 Bromoform 5.00 4.96 99.2 68.0-132 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 18 of 24 WG1591724 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 L1293430-01 Laboratory Control Sample (LCS) (LCS) R3603567-1 12/14/20 21:32 Spike Amount Analyte ug/I Bromomethane 5.00 n-Butylbenzene 5.00 sec -Butyl benzene 5.00 tert-Butylbenzene 5.00 Carbon tetrachloride 5.00 Chlorobenzene 5.00 Chlorodibromomethane 5.00 Chloroethane 5.00 Chloroform 5.00 Chloromethane 5.00 2-Chlorotoluene 5.00 4-Chlorotoluene 5.00 1,2-Dibromo-3-Chloropropane 5.00 1,2-Dibromoethane 5.00 Dibromomethane 5.00 1,2-Dichlorobenzene 5.00 1,3-Dichlorobenzene 5.00 1,4-Dichlorobenzene 5.00 Dichlorodifluoromethane 5.00 1,1-Dichloroethane 5.00 1,2-Dichloroethane 5.00 1,1-Dichloroethene 5.00 cis-1,2-Dichloroethene 5.00 trans-1,2-Dichloroethene 5.00 1,2-Dichloropropane 5.00 1,1-Dichloropropene 5.00 1,3-Dichloropropane 5.00 2,2-Dichloropropane 5.00 Di -isopropyl ether 5.00 Ethylbenzene 5.00 Hexachloro-1,3-butadiene 5.00 Isopropylbenzene 5.00 p-Isopropyltoluene 5.00 2-Butanone (MEK) 25.0 Methylene Chloride 5.00 4-Methyl-2-pentanone (MIBK) 25.0 Methyl tert-butyl ether 5.00 Naphthalene 5.00 n-Propylbenzene 5.00 Styrene 5.00 LCS Result LCS Rec. Rec. Limits ug/I % % 4.76 95.2 10.0-160 5.24 105 73.0-125 5.54 111 75.0-125 5.49 110 76.0-124 5.72 114 68.0-126 5.36 107 80.0-121 5.11 102 77.0-125 4.81 96.2 47.0-150 5.61 112 73.0-120 4.75 95.0 41.0-142 5.65 113 76.0-123 5.54 111 75.0-122 4.75 95.0 58.0-134 5.61 112 80.0-122 5.50 110 80.0-120 5.41 108 79.0-121 5.66 113 79.0-120 5.23 105 79.0-120 4.32 86.4 51.0-149 5.54 111 70.0-126 5.39 108 70.0-128 5.34 107 71.0-124 5.12 102 73.0-120 5.24 105 73.0-120 5.56 111 77.0-125 5.24 105 74.0-126 5.52 110 80.0-120 4.40 88.0 58.0-130 5.58 112 58.0-138 5.36 107 79.0-123 4.35 87.0 54.0-138 5.46 109 76.0-127 5.23 105 76.0-125 26.4 106 44.0-160 5.36 107 67.0-120 26.9 108 68.0-142 5.18 104 68.0-125 4.85 97.0 54.0-135 5.69 114 77.0-124 5.56 111 73.0-130 LCS Qualifier FP1 FTC FSS [Cn] FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 19 of 24 WG1591724 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 620OB-2011 L1293430-01 Laboratory Control Sample (LCS) (LCS) R3603567-1 12/14/20 21:32 Spike Amount Analyte ug/I 1,1,1,2-Tetrachloroethane 5.00 1,1,2,2-Tetrachloroethane 5.00 Tetrachloroethene 5.00 Toluene 5.00 1,2,3-Trichlorobenzene 5.00 1,2,4-Trichlorobenzene 5.00 1,1,1-Trichloroethane 5.00 1,1,2-Trichloroethane 5.00 Trichloroethene 5.00 Trichlorofluoromethane 5.00 1,2,3-Trichloropropane 5.00 1,2,4-Trimethylbenzene 5.00 1,3,5-Trimethyl benzene 5.00 Vinyl chloride 5.00 o-Xylene 5.00 m&p-Xylenes 10.0 (S) Toluene-d8 (S) 4-Bromofluorobenzene (S) 1,2-Dich/oroethane-d4 LCS Result ug/I 4.90 5.74 5.18 5.40 4.82 5.07 5.53 5.47 5.22 4.42 5.51 5.48 5.44 4.82 5.26 11.1 LCS Rec 98.0 115 104 108 96.4 101 109 104 88.4 110 110 109 96.4 105 104 101 104 Rec. Limits LCS Qualifier 75.0-125 65.0-130 72.0-132 79.0-120 50.0-138 57.0-137 73.0-124 80.0-120 78.0-124 59.0-147 73.0-130 76.0-121 76.0-122 67.0-131 80.0-122 80.0-122 80.0-120 77.0-126 70.0-130 FP1 FTC FSS 4 Cn FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: Excel Civil & Environmental Associates 23056 L1293430 DATE/TIME: 12/16/20 16:18 PAGE: 20 of 24 WG1591760 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 L1293430-03 Method Blank (MB) (MB) R3604047-3 12/15/20 08:11 MB Result MB Qualifier MB MDL MB RDL Analyte ug/I ug/I ug/I Naphthalene U 1.00 5.00 (S) Toluene-d8 106 80.0-120 (S) 4-Bromofluorobenzene 104 77.0-126 (S)1,2-Dich/oroethane-d4 99.4 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3604047-1 12/15/20 07:10 • (LCSD) R3604047-2 12/15/20 07:30 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/I ug/I ug/I % % % % % Naphthalene 5.00 5.13 5.05 103 101 54.0-135 1.57 20 (S) Toluene-d8 104 103 80.0-120 (S)4-Bromofluorobenzene 103 104 77.0-126 (S)1,2-Dich/oroethane-d4 100 101 70.0-130 ONE LAB. NATIONWIDE. FP1 FTc FSS 4 Cn FSr �GI FAI [Sc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 21 of 24 GLOSSARY OF TERMS ONE LAB. NATIONWIDE. Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On -Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL RDL Rec. RPD SDG (S) U Analyte Dilution Limits Original Sample Method Detection Limit. Reported Detection Limit. Recovery. Relative Percent Difference. Sample Delivery Group. FP1 FTC FSS [Cn] FSr Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be F detected in all environmental media. C Not detected at the Reporting Limit (or MDL where applicable). The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the rA laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal I9 for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or SC duplicated within these ranges. The non -spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG. This column provides a letter and/or number designation that corresponds to additional information concerning the result Qualifier reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state "ND" (Not Detected) or "BDL" Result (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry) Confidence level of 2 sigma. A brief discussion about the included sample results, including a discussion of any non -conformances to protocol Case Narrative (Cn) observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control This section of the report includes the results of the laboratory quality control analyses required by procedure or Summary (Qc) analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. This is the document created in the field when your samples were initially collected. This is used to verify the time and Sample Chain of date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This Custody (Sc) chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. This section of your report will provide the results of all testing performed on your samples. These results are provided Sample Results (Sr) by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description B The same analyte is found in the associated blank. J The identification of the analyte is acceptable; the reported value is an estimate. J3 The associated batch QC was outside the established quality control range for precision. J4 The associated batch QC was outside the established quality control range for accuracy. J5 The sample matrix interfered with the ability to make any accurate determination; spike value is high. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 22 of 24 ACCREDITATIONS & LOCATIONS ONE LAB. NATIONWIDE. Pace National is the only environmental laboratory accredited/certified to support your work nationwide from one location. One phone call, one point of contact, one laboratory. No other lab is as accessible or prepared to handle your needs throughout the country. Our capacity and capability from our single location laboratory is comparable to the collective totals of the network laboratories in our industry. The most significant benefit to our one location design is the design of our laboratory campus. The model is conducive to accelerated productivity, decreasing FP1 turn -around time, and preventing cross contamination, thus protecting sample integrity. Our focus on premium quality and prompt service allows us to be YOUR LAB OF CHOICE. Not all certifications held by the laboratory are applicable to the results reported in the attached report. Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace National. Z Tc State Accreditations f—� Alabama 40660 Nebraska _ NE-OS-15-05 SS Alaska 17-026 Nevada TN000032021-1 Arizona AZO612 New Hampshire 2975 Arkansas 88-0469 NewJersey_NELAP TNO02 C n California 2932 New Mexico TN00003 Colorado TN00003 New York 11742 s Connecticut PH-0197 North Carolina Env375 Sr Florida E87487 North Carolina' _ DW21704 Georgia NELAP North Carolina' 41 Georgia' 923 North Dakota R-140 RC Idaho TN00003 Ohio—VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 G Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LA000356 Kentucky76 KY90010 South Carolina 84004 Kentucky 2 16 South Dakota n/a Louisiana A130792 Tennessee' 4 2006 Louisiana' LA180010 Texas T104704245-20-18 [SC Maine TN00003 Texas' LABO152 Maryland 324 Utah Massachusetts M-TNO03 Vermont Michigan 9958 Virginia Minnesota 047-999-395 Washington Mississippi TN00003 West Virginia Missouri 340 Wisconsin Montana CERT0086 Wyoming Third Party Federal Accreditations A21LA — ISO 17025 1461.01 AIHA-LAP,LLC EMLAP A21LA — ISO 17025 5 1461.02 DOD Canada 1461.01 USDA EPA—Crypto TN00003 ' Drinking Water 'Underground Storage Tanks 3 Aquatic Toxicity 4 Chemical/Microbiological 5 Mold 6 Wastewater n/a Accreditation not applicable Our Locations TN00003 VT2006 460132 C847 233 998093910 A2LA 100789 1461.01 P330-15-00234 Pace National has sixty-four client support centers that provide sample pickup and/or the delivery of sampling supplies. If you would like assistance from one of our support offices, please contact our main office. Pace National performs all testing at our central laboratory. WA MT NO OR MN T ID t WI NY SD WY MI NV T NE IA OH T PA T f IL Ills WY vA UT T CA�� T KS MO KY W 11110 � NM O� AR N Sc Ir T MS A`7L GA T TX * LA T AK T T q FL wo HI ACCOUNT: PROJECT: SDG: DATE/TIME: Excel Civil & Environmental Associates 23056 L1293430 12/16/20 16:18 ME PAGE: 23 of 24 - - Billing Information: n Iv- / rear,taire,/Prec ive Chain of Custody Page _Lai Excel Civil & Environmental Associates Mr. Mike Stanforth P'es IT I Chk W 625 Huntsman Court w.nw.a+k.-a.Taao,.m, 625 Huntsman Court Gastonia, NC 28054 I Gastonia, NC 28054 d Robs LulNnan Rd ❑• Report to Email To: Mr. Mike Stanforth mstanforth@excelengncom;dfarris@excelengr.c e2MS etaidi VA 615 7 8 859 c Phoneunt eeMe:800-06h 9 O faa6ls)Sa-585• Project Description City/State /� / J /_/eJ�a `'��#e G, /� PlI/ease Clrt PT MT CT ET Servco 00311 Concord Collected: SDG # Client Project # Lab Project # Phone'. 704-853-0800 23056 EXCELENVR-23056 G 1 60 Acctnum: EXCELENVR Collected by (print) Site/Facility tD# P.O.# ?U�6 GQI.4/w� 7 U Templin: P858102 Collected by (signature) ' Quote # Rush. (Lab MUST Be Notified) P PM: — Same Day _ Five Day _ Next Day _ 5 Day Iliad Only) Date Results Needed Q eat Re I PM: 873 - Heather 1 Wagner 873 Immediately Two Day _ 10 Day (Bad Only) No. i%li/'�lq� 0 C Pg; --- Shipped Via: FedEX Ground Packed on Ice N_ Y _Three Day of 0 0 l0 > Sample ID Comp/Grab Matrix" Depth p Date Time ntrs Rema,kt Sample#(lab only) Mw-B �yset fi G W -Z :.� / t 00!% 3 X _ _ p l Mw-9 G W 3 X AW1oa-- GW 3 X O e Matrix:Remarks: pH Temp sample Receiet CLecklist COc Seal Present/Intact: _NP _N $$-Soil AIR -Air f- fiit¢r COC Signed/Accurate: �i _N GW- Groundwater B- Bioassay Flow Other Bottles arrive intact: oef _N WW-Waste Water -- Correct bottles used: eY N DW- Drinking Water Samples returned via: A /' �% /' N �j `j7 Sufficient volume sent: e't _N If able OT - Other Tracking / /_s / // _UPS edEx Courier `� > f //�� l� 1 ace;Apial VOA zero xeadspace: Preservation Correct, Checketl: _Y ItAD Screen <0.5 mR/hr� N Relinquished by : (Signature) Date: Time: Received by: (Signature) Trip Blank Receiv d: a No F +� - 7/1 _� I 7 / R / MeoH —N Relinquished by: (Signature) Date: Time: Received by: (Signature) Tem : Bottles Received: If preservation required by Login: Date/Time Relinquished by: (Signature) Date: Time: Received for lab by gnature) Date: Time: /.215 L, _ D/;li l7 Hold: Conditlo NCF / OK C/ Beverly, Trudy From: Beverly, Trudy Sent: Tuesday, January 5, 2021 7:57 AM To: Donna Farris Cc: 'Mike Stanforth' Subject: RE: [External] Servco 00311 Concord Incident 27502 - Letter Report Received. Trudy Trudy Beverly, L.G. D-�IE Hydrogeologist, Division of Waste Management North Carolina Department of Environmental Quality IFepnrlren[ol Gma'nn mental4w UST Section, Mooresville Regional Office 704.235.2182 (Office) Trudy. B everlyAncdenn gov Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Office Mailing Address: 610 East Center Avenue, Suite 301 Mooresville, NC 28115 Branch's Underground Storage Tanks Website Address: https://deg.nc.gov/about/divisions/waste-management/ust Branch's Above Ground Storage Tanks Website Address: hit2s://deq.nc.gov/about/divisions/waste-management/ust/ast-program INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES: httns://dea.nc. gov/about/divisions/waste-management/waste-management-rules-data/waste-management-gis-mans File Review Procedures: hops://deq.ne. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche): fts://deq.nc.gov/about/divisions/waste-manaizement/laserfiche Document Submittal & UST File Names for Laserfiche Policies: htti)s:Hfiles.ne.izov/nedeafWaste%2OManasement/DWM/UST[WhatsNew/Final-Electronic-Document-Submittal-Policv.l)df https:Hfiles.nc.gov/ncdeq/Waste%20Management/D WM/UST/Corrective%2OAction/UST%2Ofilc%20names%20for%2OLaserfiche.docx From: Donna Farris [mailto:dfarris@excelengr.com] Sent: Tuesday, January 5, 2021 7:38 AM To: Beverly, Trudy <trudy.beverly@ncdenr.gov> Cc: 'Mike Stanforth' <mstanforth@excelengr.com> Subject: RE: [External] Servco 00311 Concord Incident 27502 - Letter Report CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to Report Spam. See attached. Thank you, Donna Farris Excel Civil & Environmental Associates, PLLC 625 Huntsman Court, Gastonia, NC 28054 Ph: 704-853-0800 Fax: 704-853-3949 www.excelenqr.com `Please consider the environment before printing this e-mail. CONFIDENTIALITY NOTICE: The information in this e-mail is confidential. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients, any opinions or advice contained in this e-mail are subject to the terms and conditions expressed in the governing ECEA client engagement letter. From: Beverly, Trudy[mailto:trudy.beverly@ncdenr.gov] Sent: Monday, January 04, 2021 7:10 AM To: Donna Farris <dfarris@excelengr.com> Cc: Mike Stanforth <mstanforth(@excelenRr.com> Subject: RE: [External] Servco 00311 Concord Incident 27502 - Letter Report Good Morning Donna, The attached report does not have Mike's signature/seal. Please email a signed/sealed electronic copy of the report. No hard copy needed. Have a wonderful day, Trudy Trudy Beverly, L.G. Hydrogeologist, Division of Waste Management North Carolina Department of Environmental Quality UST . Section, Mooresville Regional Office g 704.235.2182 (Office) Trudy.Beverlygriedenn gov Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Office Mailing Address: 610 East Center Avenue, Suite 301 Mooresville, NC 28115 Branch's Underground Storage Tanks Website Address: ht_pt s://deg.nc.gov/about/divisions/waste-management/ust Branch's Above Ground Storage Tanks Website Address: https://deg.nc.gov/about/divisions/waste-management/ust/ast-proeram INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES: httns://dea.ne. eov/about/divisions/waste-manaeement/waste-manaeement-rules-data/waste-manaeement-eis-mans File Review Procedures: https://deq.nc. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche): hLtps://deg.nc.gov/about/divisions/waste-manaaement/laserfiche Document Submittal & UST File Names for Laserfiche Policies: httys:Hfiles.ne.izov/ncdea/Waste%2OManasement/DWM/UST/W hatsNew/Final-Electronic-Document-Submittal-Policy.pdf https:Hfiles.nc.gov/ncdeq/Waste%20Management/D WM/UST/Corrective%2OAction/UST%20file%20names%20for%2OLaserfiche.docx From: Donna Farris [mailto:dfarris@excelengr.com] Sent: Monday, December 28, 2020 12:05 PM To: Beverly, Trudy <trudy.beverly@ncdenr.gov> Cc: Mike Stanforth <mstanforthl@excelenRr.com> Subject: [External] Servco 00311 Concord Incident 27502 - Letter Report CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to Report Spam. See attached. Please advise if you need a hard copy submitted. Thank you, Donna Farris Excel Civil & Environmental Associates, PLLC 625 Huntsman Court, Gastonia, NC 28054 Ph: 704-853-0800 Fax: 704-853-3949 www.excelenqr.com `Please consider the environment before printing this e-mail. CONFIDENTIALITY NOTICE: The information in this e-mail is confidential. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients, any opinions or advice contained in this e-mail are subject to the terms and conditions expressed in the governing ECEA client engagement letter.