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Home My WebLink AboutMO-6731_27502_CA_MRP_20220129_Letter Groundwater Monitoring 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.excelenor.com January 29, 2022 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_20220129_Letter Report 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-1 OR on January 5, 2022. Laboratory analytical data indicates that overall dissolved phase hydrocarbon constituents continue to occur at the site and are decreasing with some seasonal fluctuations. Benzene and naphthalene constituent levels exceed NCAC 2L standards for MW-8 and MW 10R. Constituent levels the three monitoring wells sampled came back below the NCAC 10x2B standards, All constituent levels came back below NCAC 2L standards for MW 9. At this time, we recommend incident closure through a Notice of Residual Petroleum and issuance of a No Further Action for the incident. If you have any questions, please contact me. ��X%111lll/1�f Sincerely yours, .�`��N CgRo•'r EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC _�. O sAt Aaron C. Long, P.E. �,...... INO% \:x Principal Engineer �r�N C��`�. p.c_ Bob Gresham— SERVCQ Albemarle. NC FIELD MEASUREMENTS OF THE GROUNDWATER SAMPLES (Former) SERVCO No. 00311 Concord, North Carolina Excel Project No. 23056 Well Sampling pH Electrical Dissolved Temperature Identification Date (su) Conductivity Oxygen ORP o 1 C) (µS/cm) m (pp ) MW-8 1/5/22 5.83 0.426 3.74 -17 20.14 MW-9 6.86 0.519 3.41 126 20.10 MW-10R 6.39 0.597 2.90 84 19.87 Notes: SU PS/Cm ppm oC NS MW Standard units Microsiemens per centimeter Parts per million Degrees Celsius Not sampled, (Dry, Not Located, Destroyed, etc Monitoring Well 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 -- -- MW-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 91.79 37' 17' — 37' -- NS -- -- MW-8 99.28 49' 29' — 49' -- 34.49 -- 64.79 MW-9 80.24 26' 11' — 26' 16.90 63.34 MW-10R 79.44 30' 20'— 30' -- 14.92 -- 64.52 MW-11 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 I -- 61' 56' — 61' -- NS -- -- NOTES: Groundwater measurements collected January 5, 2022 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C 4) X o � m w a = N R t R Z v r o .2 C N w d o s 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 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 1.2 230 1 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 < 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 1 < 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C T X o � m w a = N R t R Z v r o .2 C N w d o s 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 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 I < 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 < 1 < 3 9.8 1 < 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C T X o � m w a = N R t R Z v r o .2 C N w d o s 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 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 < 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 1 < 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C 4) X o � m w a = N R t R Z v r o .2 C N w d o s 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 05/07/15 12.2 J 69.5 J 197 1,452 < 7.3 < 6.4 574 < 7.4 < 8 MW-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 06/16/21 13.2 2.98 J 34.7 40.2 < 1.01 < 1.05 95.1 < 3 < 1.9 01/05/22 19.1 3.67 J 91.3 54.6 J < 1.01 < 1.05 72.8 J4 < 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 < 2.08 160 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 < 1.06 165 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 L0.137 12/02/20 1.36 < 0.278 < 0.137 < 0.604 6.51 0.179 J < 1 J4 0.618 J < 0.19 06/16/21 < 0.0941 < 0.278 < < 0.604 1.11 < 0.105 < 1 0.752 J < 0.19 01 /05/22 < 0.0941 < 0.278 < 0.137 < 0.604 0.163 J < 0.105 < 1 J4 0.385 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C T X o � m w a = N R t R Z v r o .2 C N w d o s 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 1,900 600 580 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 06/16/21 73.7 J 214 1,130 5,240 34.5 J < 10.5 522 < 30 < 19 01 /05/22 18.9 22.3 187 328 3.6 J < 1.05 50.2 J4 < 3 < 1.9 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 I <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 11/16-5/191 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 Sam le p Date N N y 00 y 0 3 2 C N C � r w G1 C T X o � m w a = N R t R Z v r o .2 C N w d o s 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 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 MW-13 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 <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 - 5/191 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 Sam le p Date N N y m y 0 3 2 C N C � r w G1 C T X o F- m w a = N R t R Z v r o .2 F C N w d o s � 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 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 j < 1 j < 3 2.5 1.4 < 5 71 < 1 12/03/12 < 1 < 5 < 1 < 3 4.6 2.1 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 1 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 10/11/11 <1 <5 <1 <3 <1 <1 <5 <1 <1 05/21/12 <1 <5 <1 <3 <1 <1 <5 <1 <1 12/03/12 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 < 14 <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 213 NA - Not Analyzed MTBE - Methyl Tert Butyl Ether IPE - Di -Isopropyl Ether PCE - Tetrachloroethene TCE - Trichloroethene NCAC - North Carolina Administrative Code Additional Detections: 1-22 Sampling Event Isopropylbenzene: MW-8 14.1; MW-10R 10 J p-Isopropyltoluene: MW-8 1.81 J; MW-1 OR 2.99 J n-Propylbenzene: MW-8 32.7; MW-1 OR 28.4 1,2,4-Trimethylbenzene: MW-8 264; MW-1OR 215 1,3,5-Trimethylbenzene: MW-8 19.7; MW-1OR 41.4 MW-8: n-Butylbenzene 13.5; sec-Butylbenzene 9.7 J MW-1 OR: n-Butylbenzene 2.24 J; sec-Butylbenzene 2.35 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 i FIRE STATION i i ASPHALT I I I i i MW-6® I ® I Ws-1 CHURCH I j I _.._..� I I i ASPHALT I I I I I i i � I i i i i i COMMERCIAL CHURCH i NOTES i Map adapted from Aerial Photograph & i Cabarrus County Tax Map. j UST - Underground Storage Tank All USTs removed on 5/28/03 i iMW-13 ASPHALT Data from liquid levels collected on January 5, 2022 I I I z O I ®MW-11 I � i I 2 C� ! COMMERCIAL = I I C C� I I , = I ASPHALT I ' Cn m I LEGEND MW-8 64' I 64.79' Property Line (Approximate) MW-10R i 64.52' ! i------- Right of Way GRASS I RESIDENTIAL -------- Former UST Area CANOPY �� I i oW I Water Table Contour Line (Approximate) MW-5 I I Monitoring Well Location I r-------- � Q i ® Irrigation Well Location ® m !MW-3 i ? • • VW 1 w MW-2 MW-11 MW-9 j q)MW-14------ i i _� 63.34' r MI i i MW-4 I @W-12 ------ ® - BRUMLEY AVENUE NE I i GRASS I I I LU > o RESIDENTIAL O ' O 2 N Q ti FIRE STATION I I ASPHALT I I NS NS I MW-6 : ws-1 I CHURCH j I I r.._.._.._.._..� I ' I i ASPHALT i i I I ' I I ' I � I i i i i i i � CHURCH I i i i :MW-1 I I I I Z O I � j I 2 I C7 I COMMERCIAL = I I C � j I = I ASPHALT 1 C i rrl M i 168.7 J MW-8 <1 I <3 I \ CANOPY I o� I r MW-2 _'2 MW-1�� Ns Mw-3 I j rys ��gN I L--------J MW-4 18.9 667.7 3.6 J I <3 I I MW-1 OR; NS 5 MW-9 I < 0.0941 BDL NS 0.163 J BRUMLEY AVENUE NE 0.385J NS ASPHALT r i i I I GRASS I RESIDENTIAL I I I NS MW—�44�NMW-12 --� Lj o RESIDENTIAL O ' O Q 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 January 5, 2022 LEGEND - - - - - Property Line (Approximate) ------- Right of Way -------- Former UST Area Monitoring Well Location Benzene BTEX Constituents Shown MTBE PCE Estimated extent of Benzene at 2L in groundwater Estimated extent of naphthalene at 2L in groundwater aceAnalytical ANALYTICAL REPORT January 13, 2022 Excel Civil & Environmental Associates Sample Delivery Group Samples Received: Project Number: Description: L1449827 01/11/2022 23056 Servco 00311 Concord Report To: Aaron Long 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. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 1 of 21 TABLE OF CONTENTS Cp: Cover Page Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 4 Sr: Sample Results 5 MW-8 L1449827-01 5 MW-9 L1449827-02 7 MW-10R L1449827-03 9 Qc: Quality Control Summary 11 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 11 GI: Glossary of Terms 19 Al: Accreditations & Locations 20 Sc: Sample Chain of Custody 21 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 2 of 21 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-8 L1449827-01 GW C. DeVane 01/05/2215:10 01/11/22 09:30 Cp Method Batch Dilution Preparation Analysis Analyst Location date/time date/time FTC Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1800709 10 01/12/22 06:01 01/12/22 06:01 ADM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1800880 10 01/12/2216:23 01/12/2216:23 ACG Mt. Juliet, TN Collected by Collected date/time Received date/time MW-9 L1449827-02 GW C. DeVane 01/05/2214:35 01/11/22 09:30 4Cn Method Batch Dilution Preparation Analysis Analyst Location date/time Fdate/time Volatile Organic Compounds (GC/MS) by Method 6200E-2011 WG1800709 1 01/12/22 03:59 01/12/22 03:59 ADM Mt. Juliet, TN 6 QC Collected by Collected date/time Received date/time MW-10R L1449827-03 GW C. Devane 01/05/2214:55 01/11/22 09:30 'GI Method Batch Dilution Preparation Analysis Analyst Location date/time date/time FAI Volatile Organic Compounds (GC/MS) by Method 620OB-2011 WG1800880 10 01/12/2216:43 01/12/2216:43 ACG Mt. Juliet, TN FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 3 of 21 CASE NARRATIVE 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 have 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 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. Heather J Wagner Project Manager FP FC FSS Fr RC F, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 4 of 21 MW-8 Collected date/time: 01/05/22 15:10 SAMPLE RESULTS - 01 L1449827 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Result Qualifier MDL Analyte ug/I ug/I Acetone U 113 Acrolein U 25.4 Acrylonitrile U 6.71 Benzene 19.1 0.941 Bromobenzene U 1.18 Bromodichloromethane U 1.36 Bromoform U 1.29 Bromomethane U 6.05 n-Butylbenzene 13.5 1.57 sec -Butyl benzene 9.70 J 1.25 ter[-Butylbenzene U 1.27 Carbon tetrachloride U 1.28 Chlorobenzene U 1.16 Chlorodibromomethane U 1.40 Chloroethane U 1.92 Chloroform U 1.11 Chloromethane U 9.60 2-Chlorotoluene U 1.06 4-Chlorotoluene U 1.14 1,2-Dibromo-3-Chloropropane U 2.76 1,2-Dibromoethane U 1.26 Dibromomethane U 1.22 1,2-Dichlorobenzene U 1.07 1,3-Dichlorobenzene U 1.10 1,4-Dichlorobenzene U 1.20 Dichlorodifluoromethane U 3.74 1,1-Dichloroethane U 1.00 1,2-Dichloroethane U 0.819 1,1-Dichloroethene U 1.88 cis-1,2-Dichloroethene U 1.26 trans-1,2-Dichloroethene U 1.49 1,2-Dichloropropane U 1.49 1,1-Dichloropropene U 1.42 1,3-Dichloropropane U 1.10 2,2-Dichloropropane U 1.61 Di -isopropyl ether U 1.05 Ethylbenzene 91.3 1.37 Hexachloro-1,3-butadiene U 3.37 Isopropylbenzene 14.1 1.05 p-Isopropyltoluene 1.81 J 1.20 2-Butanone (MEK) U 11.9 Methylene Chloride U 4.30 4-Methyl-2-pentanone (MIBK) U 4.78 Methyl tert-butyl ether U 1.01 Naphthalene 72.8 J4 10.0 n-Propylbenzene 32.7 0.993 Styrene U 1.18 1,1,1,2-Tetrachloroethane U 1.47 1,1,2,2-Tetrachloroethane U 1.33 Tetrachloroethene U 3.00 Toluene 3.67 J 2.78 1,2,3-Trichlorobenzene U 2.30 1,2,4-Trichlorobenzene U 4.81 1,1,1-Trichloroethane U 1.49 1,1,2-Trichloroethane U 1.58 Trichloroethene U 1.90 ACCOUNT: Excel Civil & Environmental Associates RDL Dilution Analysis ug/I date / time Batch 500 10 01/12/2022 06:01 WG1800709 500 10 01/12/2022 06:01 WG1800709 100 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 25.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 100 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/2022 06:01 WG1800709 100 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 50.0 10 01/12/202216:23 WG1800880 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 10.0 10 01/12/2022 06:01 WG1800709 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 5 of 21 FP1 FTc FSS 4 Cn Rc F FAI FSC MW-8 SAMPLE RESULTS - 01 Collected date/time: 01/05/22 15:10 L1449827 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 1.60 50.0 10 01/12/2022 06:01 U 2.37 25.0 10 01/12/2022 06:01 264 3.22 10.0 10 01/12/2022 06:01 19.7 1.04 10.0 10 01/12/2022 06:01 U 2.34 10.0 10 01/12/2022 06:01 9.49 1_ 1.74 10.0 10 01/12/2022 06:01 45.1 4.30 20.0 10 01/12/2022 06:01 102 80.0-120 0111212022 06.01 102 80.0-120 011121202216:23 105 77.0-126 0111212022 06.01 100 77.0-126 011121202216:23 104 70.0-130 0111212022 06.01 108 70.0-130 011121202216:23 Batch WG1800709 WG1800709 WG1800709 WG1800709 WG1800709 WG1800709 WG1800709 WG1800709 WG1800880 WG1800709 WG1800880 WG1800709 WG1800880 FP1 FTc FSS 4 Cn RC F, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 6 of 21 MW-9 Collected date/time: 01/05/22 14:35 SAMPLE RESULTS - 02 L1449827 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Result Analyte ug/I Acetone U Acrolein U Acrylonitrile U Benzene U Bromobenzene U Bromodichloromethane U Bromoform U Bromomethane U n-Butylbenzene U sec -Butyl benzene U ter[-Butylbenzene U Carbon tetrachloride U Chlorobenzene U Chlorodibromomethane U Chloroethane U Chloroform U Chloromethane U 2-Chlorotoluene U 4-Chlorotoluene U 1,2-Dibromo-3-Chloropropane U 1,2-Dibromoethane U Dibromomethane U 1,2-Dichlorobenzene U 1,3-Dichlorobenzene U 1,4-Dichlorobenzene U 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 2-Butanone (MEK) U Methylene Chloride U 4-Methyl-2-pentanone (MIBK) U Methyl tert-butyl ether 0.163 Naphthalene U n-Propylbenzene U Styrene U 1,1,1,2-Tetrachloroethane U 1,1,2,2-Tetrachloroethane U Tetrachloroethene 0.385 Toluene U 1,2,3-Trichlorobenzene U 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 J4 J ACCOUNT: Excel Civil & Environmental Associates 11.3 50.0 1 01/12/2022 03:59 WG1800709 2.54 50.0 1 01/12/2022 03:59 WG1800709 0.671 10.0 1 01/12/2022 03:59 WG1800709 0.0941 1.00 1 01/12/2022 03:59 WG1800709 0.118 1.00 1 01/12/2022 03:59 WG1800709 0.136 1.00 1 01/12/2022 03:59 WG1800709 0.129 1.00 1 01/12/2022 03:59 WG1800709 0.605 5.00 1 01/12/2022 03:59 WG1800709 0.157 1.00 1 01/12/2022 03:59 WG1800709 0.125 1.00 1 01/12/2022 03:59 WG1800709 0.127 1.00 1 01/12/2022 03:59 WG1800709 0.128 1.00 1 01/12/2022 03:59 WG1800709 0.116 1.00 1 01/12/2022 03:59 WG1800709 0.140 1.00 1 01/12/2022 03:59 WG1800709 0.192 5.00 1 01/12/2022 03:59 WG1800709 0.111 5.00 1 01/12/2022 03:59 WG1800709 0.960 2.50 1 01/12/2022 03:59 WG1800709 0.106 1.00 1 01/12/2022 03:59 WG1800709 0.114 1.00 1 01/12/2022 03:59 WG1800709 0.276 5.00 1 01/12/2022 03:59 WG1800709 0.126 1.00 1 01/12/2022 03:59 WG1800709 0.122 1.00 1 01/12/2022 03:59 WG1800709 0.107 1.00 1 01/12/2022 03:59 WG1800709 0.110 1.00 1 01/12/2022 03:59 WG1800709 0.120 1.00 1 01/12/2022 03:59 WG1800709 0.374 5.00 1 01/12/2022 03:59 WG1800709 0.100 1.00 1 01/12/2022 03:59 WG1800709 0.0819 1.00 1 01/12/2022 03:59 WG1800709 0.188 1.00 1 01/12/2022 03:59 WG1800709 0.126 1.00 1 01/12/2022 03:59 WG1800709 0.149 1.00 1 01/12/2022 03:59 WG1800709 0.149 1.00 1 01/12/2022 03:59 WG1800709 0.142 1.00 1 01/12/2022 03:59 WG1800709 0.110 1.00 1 01/12/2022 03:59 WG1800709 0.161 1.00 1 01/12/2022 03:59 WG1800709 0.105 1.00 1 01/12/2022 03:59 WG1800709 0.137 1.00 1 01/12/2022 03:59 WG1800709 0.337 1.00 1 01/12/2022 03:59 WG1800709 0.105 1.00 1 01/12/2022 03:59 WG1800709 0.120 1.00 1 01/12/2022 03:59 WG1800709 1.19 10.0 1 01/12/2022 03:59 WG1800709 0.430 5.00 1 01/12/2022 03:59 WG1800709 0.478 10.0 1 01/12/2022 03:59 WG1800709 0.101 1.00 1 01/12/2022 03:59 WG1800709 1.00 5.00 1 01/12/2022 03:59 WG1800709 0.0993 1.00 1 01/12/2022 03:59 WG1800709 0.118 1.00 1 01/12/2022 03:59 WG1800709 0.147 1.00 1 01/12/2022 03:59 WG1800709 0.133 1.00 1 01/12/2022 03:59 WG1800709 0.300 1.00 1 01/12/2022 03:59 WG1800709 0.278 1.00 1 01/12/2022 03:59 WG1800709 0.230 1.00 1 01/12/2022 03:59 WG1800709 0.481 1.00 1 01/12/2022 03:59 WG1800709 0.149 1.00 1 01/12/2022 03:59 WG1800709 0.158 1.00 1 01/12/2022 03:59 WG1800709 0.190 1.00 1 01/12/2022 03:59 WG1800709 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 7 of 21 FP1 FTc FSS 4 Cn Rc F FAI FSC MW-9 SAMPLE RESULTS - 02 Collected date/time: 01/05/22 14:35 L1449827 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/I ug/I ug/I date / time Trichlorofluoromethane U 0.160 5.00 1 01/12/2022 03:59 WG1800709 1,2,3-Trichloropropane U 0.237 2.50 1 01/12/2022 03:59 WG1800709 1,2,4-Trimethylbenzene U 0.322 1.00 1 01/12/2022 03:59 WG1800709 1,3,5-Trimethyl benzene U 0.104 1.00 1 01/12/2022 03:59 WG1800709 Vinyl chloride U 0.234 1.00 1 01/12/2022 03:59 WG1800709 o-Xylene U 0.174 1.00 1 01/12/2022 03:59 WG1800709 m&p-Xylenes U 0.430 2.00 1 01/12/2022 03:59 WG1800709 (S) Toluene-d8 102 80.0-120 0111212022 03:59 WG1800709 (S) 4-Bromofluorobenzene 102 77.0-126 0111212022 03:59 WG1800709 (S) 1,2-Dich/oroethone-d4 109 70.0-130 0111212022 03:59 WG1800709 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 8 of 21 FP1 FTc FSS 4 Cn RC F, FAI FSC MW-10R Collected date/time: 01/05/22 14:55 SAMPLE RESULTS - 03 L1449827 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 Analyte Acetone Acrolein Acrylonitrile Benzene Bromobenzene Bromodichloromethane Bromoform Bromomethane n-Butylbenzene sec -Butyl benzene ter[-Butylbenzene Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane Chloroform Chloromethane 2-Chlorotoluene 4-Chlorotoluene 1,2-Dibromo-3-Chloropropane 1,2-Dibromoethane Dibromomethane 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Dichlorodifluoromethane 1,1-Dichloroethane 1,2-Dichloroethane 1,1-Dichloroethene cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,2-Dichloropropane 1,1-Dichloropropene 1,3-Dichloropropane 2,2-Dichloropropane Di -isopropyl ether Ethylbenzene Hexachloro-1,3-butadiene Isopropylbenzene p-Isopropyltoluene 2-Butanone (MEK) Methylene Chloride 4-Methyl-2-pentanone (MIBK) Methyl tert-butyl ether Naphthalene n-Propylbenzene Styrene 1,1,1, 2-Tet ra c h l o ro et h a n e 1,1,2,2-Tetrachloroetha ne Tetrachloroethene Toluene 1,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene 1,1,1-T ri c h l o ro eth a n e 1,1,2-Trichloroethane Trichloroethene Result Qualifier MDL RDL Dilution Analysis ug/I ug/I ug/I date / time J 113 500 10 01/12/202216:43 IJ 25.4 500 10 01/12/202216:43 J 6.71 100 10 01/12/202216:43 18.9 0.941 10.0 10 01/12/202216:43 J 1.18 10.0 10 01/12/202216:43 J 1.36 10.0 10 01/12/202216:43 J 1.29 10.0 10 01/12/202216:43 J 6.05 50.0 10 01/12/202216:43 2.24 J 1.57 10.0 10 01/12/202216:43 2.35 J 1.25 10.0 10 01/12/202216:43 J 1.27 10.0 10 01/12/202216:43 J 1.28 10.0 10 01/12/202216:43 J 1.16 10.0 10 01/12/202216:43 IJ 1.40 10.0 10 01/12/202216:43 J 1.92 50.0 10 01/12/202216:43 IJ 1.11 50.0 10 01/12/202216:43 J 9.60 25.0 10 01/12/202216:43 U 1.06 10.0 10 01/12/202216:43 J 1.14 10.0 10 01/12/202216:43 J J4 2.76 50.0 10 01/12/202216:43 J 1.26 10.0 10 01/12/202216:43 J 1.22 10.0 10 01/12/202216:43 J 1.07 10.0 10 01/12/202216:43 J 1.10 10.0 10 01/12/202216:43 J 1.20 10.0 10 01/12/202216:43 J 3.74 50.0 10 01/12/202216:43 J 1.00 10.0 10 01/12/202216:43 J 0.819 10.0 10 01/12/202216:43 J 1.88 10.0 10 01/12/202216:43 IJ 1.26 10.0 10 01/12/202216:43 J 1.49 10.0 10 01/12/202216:43 IJ 1.49 10.0 10 01/12/202216:43 J 1.42 10.0 10 01/12/202216:43 IJ 1.10 10.0 10 01/12/202216:43 J 1.61 10.0 10 01/12/202216:43 J 1.05 10.0 10 01/12/202216:43 187 1.37 10.0 10 01/12/202216:43 IJ 3.37 10.0 10 01/12/202216:43 10.0 J 1.05 10.0 10 01/12/202216:43 2.99 J 1.20 10.0 10 01/12/202216:43 J 11.9 100 10 01/12/202216:43 J 4.30 50.0 10 01/12/202216:43 J 4.78 100 10 01/12/202216:43 3.60 J 1.01 10.0 10 01/12/202216:43 50.2 J4 10.0 50.0 10 01/12/202216:43 28.4 0.993 10.0 10 01/12/202216:43 J 1.18 10.0 10 01/12/202216:43 J 1.47 10.0 10 01/12/202216:43 J 1.33 10.0 10 01/12/202216:43 U 3.00 10.0 10 01/12/202216:43 22.3 2.78 10.0 10 01/12/202216:43 J 2.30 10.0 10 01/12/202216:43 J 4.81 10.0 10 01/12/202216:43 J 1.49 10.0 10 01/12/202216:43 J 1.58 10.0 10 01/12/202216:43 J 1.90 10.0 10 01/12/202216:43 Batch WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 FP1 FTc FSS 4 Cn Rc I q, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 9 of 21 MW-10R SAMPLE RESULTS - 03 Collected date/time: 01/05/22 14:55 L1449827 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 01/12/202216:43 1,2,3-Trichloropropane U 2.37 25.0 10 01/12/202216:43 1,2,4-Trimethylbenzene 215 3.22 10.0 10 01/12/202216:43 1,3,5-Trimethyl benzene 41.4 1.04 10.0 10 01/12/202216:43 Vinyl chloride U 2.34 10.0 10 01/12/202216:43 o-Xylene 113 1.74 10.0 10 01/12/2022 16:43 m&p-Xylenes 215 4.30 20.0 10 01/12/202216:43 (S) Toluene-d8 99.4 80.0-120 011121202216:43 (S) 4-Bromofluorobenzene 103 77.0-126 011121202216:43 (S)1,2-Dich/oroethone-d4 106 70.0-130 011121202216:43 Sample Narrative: L1449827-03 WG1800880: Non -target compounds too high to run at a lower dilution. Batch WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 WG1800880 FP1 FTc FSS 4 Cn RC F, FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 10 of 21 WG1800709 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 QUALITY CONTROL SUMMARY L1449827-01,02 Method Blank (MB) (MB) R3749128-3 01/11/22 21:42 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 L1449827 01/13/22 13:08 11 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800709 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 QUALITY CONTROL SUMMARY L1449827-01,02 Method Blank (MB) (MB) R3749128-3 01/11/22 21:42 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 U Styrene U 1,1,1,2-Tetrachloroethane U 1,1,2,2-Tetrachloroethane U Tetrachloroethene U Toluene U 1,2,3-Trichlorobenzene U 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 U Vinyl chloride U o-Xylene U m&p-Xylenes U (S) Toluene-d8 105 (S) 4-Bromof/uorobenzene 101 (S)1,2-Dich/oroethane-d4 102 MB Qualifier MB MDL MB RDL ug/I ug/I 1.19 10.0 0.430 5.00 0.478 10.0 0.101 1.00 1.00 5.00 0.0993 1.00 0.118 1.00 0.147 1.00 0.133 1.00 0.300 1.00 0.278 1.00 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 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) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3749128-1 01/11/22 20:20 • (LCSD) R3749128-2 01/11/22 20:41 Spike Amount LCS Result LCSD Result Analyte ug/I ug/I ug/I Acetone 25.0 31.4 31.1 Acrolein 25.0 20.6 21.4 Acrylonitrile 25.0 29.2 30.3 Benzene 5.00 4.44 4.65 Bromobenzene 5.00 4.78 4.83 Bromodichloromethane 5.00 4.98 5.09 Bromoform 5.00 5.42 5.35 ACCOUNT: Excel Civil & Environmental Associates LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 126 124 19.0-160 0.960 27 82.4 85.6 10.0-160 3.81 26 117 121 55.0-149 3.70 20 88.8 93.0 70.0-123 4.62 20 95.6 96.6 73.0-121 1.04 20 99.6 102 75.0-120 2.18 20 108 107 68.0-132 1.30 20 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 12 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800709 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1449827-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3749128-1 01/11/22 20:20 • (LCSD) R3749128-2 01/11/22 20:41 Spike Amount LCS Result LCSD Result Analyte ug/I ug/I ug/I Bromomethane 5.00 4.19 4.38 n-Butylbenzene 5.00 4.89 5.10 sec -Butyl benzene 5.00 4.87 4.87 tert-Butylbenzene 5.00 4.89 4.61 Carbon tetrachloride 5.00 4.67 4.91 Chlorobenzene 5.00 5.14 4.98 Chlorodibromomethane 5.00 5.34 5.22 Chloroethane 5.00 4.43 4.68 Chloroform 5.00 4.86 4.87 Chloromethane 5.00 4.84 5.11 2-Chlorotoluene 5.00 4.75 4.56 4-Chlorotoluene 5.00 4.74 4.61 1,2-Dibromo-3-Chloropropane 5.00 6.14 6.26 1,2-Dibromoethane 5.00 5.29 5.24 Dibromomethane 5.00 5.28 5.30 1,2-Dichlorobenzene 5.00 5.44 5.41 1,3-Dichlorobenzene 5.00 5.33 5.19 1,4-Dichlorobenzene 5.00 5.08 5.09 Dichlorodifluoromethane 5.00 4.60 4.77 1,1-Dichloroethane 5.00 4.69 4.85 1,2-Dichloroethane 5.00 4.92 5.16 1,1-Dichloroethene 5.00 3.82 3.97 cis-1,2-Dichloroethene 5.00 4.52 4.72 trans-1,2-Dichloroethene 5.00 4.37 4.53 1,2-Dichloropropane 5.00 4.79 5.21 1,1-Dichloropropene 5.00 4.37 4.49 1,3-Dichloropropane 5.00 5.22 4.94 2,2-Dichloropropane 5.00 3.90 3.97 Di -isopropyl ether 5.00 4.74 4.83 Ethylbenzene 5.00 4.89 4.76 Hexachloro-1,3-butadiene 5.00 5.51 5.29 Isopropylbenzene 5.00 5.10 5.07 p-Isopropyltoluene 5.00 4.93 4.98 2-Butanone (MEK) 25.0 29.7 30.1 Methylene Chloride 5.00 4.62 4.89 4-Methyl-2-pentanone (MIBK) 25.0 27.9 27.7 Methyl tert-butyl ether 5.00 4.68 5.02 Naphthalene 5.00 6.96 6.88 n-Propylbenzene 5.00 4.70 4.75 Styrene 5.00 5.17 5.01 ACCOUNT: Excel Civil & Environmental Associates LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 83.8 87.6 10.0-160 4.43 25 97.8 102 73.0-125 4.20 20 97.4 97.4 75.0-125 0.000 20 97.8 92.2 76.0-124 5.89 20 93.4 98.2 68.0-126 5.01 20 103 99.6 80.0-121 3.16 20 107 104 77.0-125 2.27 20 88.6 93.6 47.0-150 5.49 20 97.2 97.4 73.0-120 0.206 20 96.8 102 41.0-142 5.43 20 95.0 91.2 76.0-123 4.08 20 94.8 92.2 75.0-122 2.78 20 123 125 58.0-134 1.94 20 106 105 80.0-122 0.950 20 106 106 80.0-120 0.378 20 109 108 79.0-121 0.553 20 107 104 79.0-120 2.66 20 102 102 79.0-120 0.197 20 92.0 95.4 51.0-149 3.63 20 93.8 97.0 70.0-126 3.35 20 98.4 103 70.0-128 4.76 20 76.4 79.4 71.0-124 3.85 20 90.4 94.4 73.0-120 4.33 20 87.4 90.6 73.0-120 3.60 20 95.8 104 77.0-125 8.40 20 87.4 89.8 74.0-126 2.71 20 104 98.8 80.0-120 5.51 20 78.0 79.4 58.0-130 1.78 20 94.8 96.6 58.0-138 1.88 20 97.8 95.2 79.0-123 2.69 20 110 106 54.0-138 4.07 20 102 101 76.0-127 0.590 20 98.6 99.6 76.0-125 1.01 20 119 120 44.0-160 1.34 20 92.4 97.8 67.0-120 5.68 20 112 111 68.0-142 0.719 20 93.6 100 68.0-125 7.01 20 139 138 54.0-135 J4 J4 1.16 20 94.0 95.0 77.0-124 1.06 20 103 100 73.0-130 3.14 20 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 13 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800709 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1449827-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3749128-1 01/11/22 20:20 • (LCSD) R3749128-2 01/11/22 20:41 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits Analyte ug/I ug/I ug/I % % % 1,1,1,2-Tetrachloroethane 5.00 5.31 5.30 106 106 75.0-125 1,1,2,2-Tetrachloroethane 5.00 5.19 4.92 104 98.4 65.0-130 Tetrachloroethene 5.00 4.98 5.03 99.6 101 72.0-132 Toluene 5.00 4.85 4.84 97.0 96.8 79.0-120 1,2,3-Trichlorobenzene 5.00 5.60 5.38 112 108 50.0-138 1,2,4-Trichlorobenzene 5.00 5.89 6.20 118 124 57.0-137 1,1,1-Trichloroethane 5.00 4.68 4.76 93.6 95.2 73.0-124 1,1,2-Trichloroethane 5.00 5.21 5.32 104 106 80.0-120 Trichloroethene 5.00 5.03 4.86 101 97.2 78.0-124 Trichlorofluoromethane 5.00 4.50 4.62 90.0 92.4 59.0-147 1,2,3-Trichloropropane 5.00 5.48 5.25 110 105 73.0-130 1,2,4-Trimethylbenzene 5.00 4.89 4.93 97.8 98.6 76.0-121 1,3,5-Trimethyl benzene 5.00 4.96 4.88 99.2 97.6 76.0-122 Vinyl chloride 5.00 4.39 4.49 87.8 89.8 67.0-131 o-Xylene 5.00 5.13 5.01 103 100 80.0-122 m&p-Xylenes 10.0 9.84 9.88 98.4 98.8 80.0-122 (S) Toluene-d8 104 102 80.0-120 (S) 4-Bromofluorobenzene 104 103 77.0-126 (S)1,2-Dich/oroethane-d4 102 106 70.0-130 LCS Qualifier LCSD Qualifier RPD RPD Limits 0.189 20 5.34 20 0.999 20 0.206 20 4.01 20 5.13 20 1.69 20 2.09 20 3.44 20 2.63 20 4.29 20 0.815 20 1.63 20 2.25 20 2.37 20 0.406 20 FP1 FC FSS 4 Cn FSr �GI FAI FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 14 of 21 WG1800880 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 QUALITY CONTROL SUMMARY 1-1449827-01,03 Method Blank (MB) (MB) R3749312-5 01/12/22 11:44 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 L1449827 01/13/22 13:08 15 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800880 Volatile Organic Compounds (GC/MS) by Method 620OB-2011 QUALITY CONTROL SUMMARY 1-1449827-01,03 Method Blank (MB) (MB) R3749312-5 01/12/22 11:44 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 U Styrene U 1,1,1,2-Tetrachloroethane U 1,1,2,2-Tetrachloroethane U Tetrachloroethene U Toluene U 1,2,3-Trichlorobenzene U 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 U Vinyl chloride U o-Xylene U m&p-Xylenes U (S) Toluene-d8 102 (S) 4-Bromof/uorobenzene 100 (S) 1,2-Dich/oroethane-d4 104 MB Qualifier MB MDL MB RDL ug/I ug/I 1.19 10.0 0.430 5.00 0.478 10.0 0.101 1.00 1.00 5.00 0.0993 1.00 0.118 1.00 0.147 1.00 0.133 1.00 0.300 1.00 0.278 1.00 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 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) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3749312-1 01/12/22 10:05 • (LCSD) R3749312-2 01/12/22 10:25 Spike Amount LCS Result LCSD Result Analyte ug/I ug/I ug/I Acetone 25.0 33.6 34.6 Acrolein 25.0 16.5 16.4 Acrylonitrile 25.0 27.3 30.5 Benzene 5.00 4.75 4.68 Bromobenzene 5.00 4.83 5.00 Bromodichloromethane 5.00 5.20 5.32 Bromoform 5.00 5.52 5.35 ACCOUNT: Excel Civil & Environmental Associates LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 134 138 19.0-160 2.93 27 66.0 65.6 10.0-160 0.608 26 109 122 55.0-149 11.1 20 95.0 93.6 70.0-123 1.48 20 96.6 100 73.0-121 3.46 20 104 106 75.0-120 2.28 20 110 107 68.0-132 3.13 20 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 16 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800880 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1449827-01,03 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3749312-1 01/12/22 10:05 • (LCSD) R3749312-2 01/12/22 10:25 Spike Amount LCS Result LCSD Result Analyte ug/I ug/I ug/I Bromomethane 5.00 4.97 4.90 n-Butylbenzene 5.00 5.28 5.54 sec -Butyl benzene 5.00 5.15 5.34 tert-Butylbenzene 5.00 5.28 5.42 Carbon tetrachloride 5.00 5.39 5.38 Chlorobenzene 5.00 5.30 4.93 Chlorodibromomethane 5.00 5.37 5.31 Chloroethane 5.00 5.12 4.60 Chloroform 5.00 5.15 5.06 Chloromethane 5.00 5.14 4.58 2-Chlorotoluene 5.00 4.69 4.93 4-Chlorotoluene 5.00 4.88 5.15 1,2-Dibromo-3-Chloropropane 5.00 6.03 6.84 1,2-Dibromoethane 5.00 5.08 5.02 Dibromomethane 5.00 5.32 5.37 1,2-Dichlorobenzene 5.00 5.35 5.77 1,3-Dichlorobenzene 5.00 5.52 5.67 1,4-Dichlorobenzene 5.00 5.22 5.33 Dichlorodifluoromethane 5.00 5.42 5.23 1,1-Dichloroethane 5.00 5.02 5.01 1,2-Dichloroethane 5.00 5.13 5.39 1,1-Dichloroethene 5.00 4.16 4.00 cis-1,2-Dichloroethene 5.00 4.75 4.70 trans-1,2-Dichloroethene 5.00 4.64 4.75 1,2-Dichloropropane 5.00 5.08 4.99 1,1-Dichloropropene 5.00 4.73 4.54 1,3-Dichloropropane 5.00 4.85 4.85 2,2-Dichloropropane 5.00 5.24 4.91 Di -isopropyl ether 5.00 4.66 4.84 Ethylbenzene 5.00 5.03 4.81 Hexachloro-1,3-butadiene 5.00 5.70 5.57 Isopropylbenzene 5.00 5.34 5.02 p-Isopropyltoluene 5.00 5.30 5.38 2-Butanone (MEK) 25.0 29.3 31.3 Methylene Chloride 5.00 5.01 4.94 4-Methyl-2-pentanone (MIBK) 25.0 26.2 26.8 Methyl tert-butyl ether 5.00 4.55 4.76 Naphthalene 5.00 6.12 6.80 n-Propylbenzene 5.00 4.85 4.97 Styrene 5.00 5.10 4.90 ACCOUNT: Excel Civil & Environmental Associates LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 99.4 98.0 10.0-160 1.42 25 106 111 73.0-125 4.81 20 103 107 75.0-125 3.62 20 106 108 76.0-124 2.62 20 108 108 68.0-126 0.186 20 106 98.6 80.0-121 7.23 20 107 106 77.0-125 1.12 20 102 92.0 47.0-150 10.7 20 103 101 73.0-120 1.76 20 103 91.6 41.0-142 11.5 20 93.8 98.6 76.0-123 4.99 20 97.6 103 75.0-122 5.38 20 121 137 58.0-134 J4 12.6 20 102 100 80.0-122 1.19 20 106 107 80.0-120 0.935 20 107 115 79.0-121 7.55 20 110 113 79.0-120 2.68 20 104 107 79.0-120 2.09 20 108 105 51.0-149 3.57 20 100 100 70.0-126 0.199 20 103 108 70.0-128 4.94 20 83.2 80.0 71.0-124 3.92 20 95.0 94.0 73.0-120 1.06 20 92.8 95.0 73.0-120 2.34 20 102 99.8 77.0-125 1.79 20 94.6 90.8 74.0-126 4.10 20 97.0 97.0 80.0-120 0.000 20 105 98.2 58.0-130 6.50 20 93.2 96.8 58.0-138 3.79 20 101 96.2 79.0-123 4.47 20 114 111 54.0-138 2.31 20 107 100 76.0-127 6.18 20 106 108 76.0-125 1.50 20 117 125 44.0-160 6.60 20 100 98.8 67.0-120 1.41 20 105 107 68.0-142 2.26 20 91.0 95.2 68.0-125 4.51 20 122 136 54.0-135 J4 10.5 20 97.0 99.4 77.0-124 2.44 20 102 98.0 73.0-130 4.00 20 PROJECT: SDG: DATE/TIME: PAGE: 23056 L1449827 01/13/22 13:08 17 of 21 FP1 FC FSS 4 Cn FSr �GI FAI FSC WG1800880 QUALITY CONTROL SUMMARY Volatile Organic Compounds (GC/MS) by Method 620OB-2011 1-1449827-01,03 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) FP1(LCS) R3749312-1 01/12/22 10:05 • (LCSD) R3749312-2 01/12/22 10:25 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 % % % % % FC 1,1,1,2-Tetrachloroethane 5.00 5.43 5.28 109 106 75.0-125 2.80 20 1,1,2,2-Tetrachloroethane 5.00 4.97 5.15 99.4 103 65.0-130 3.56 20 FSS Tetrachloroethene 5.00 5.06 5.28 101 106 72.0-132 4.26 20 Toluene 5.00 4.97 4.72 99.4 94.4 79.0-120 5.16 20 1,2,3-Trichlorobenzene 5.00 5.14 5.54 103 ill 50.0-138 7.49 20 rCn 1,2,4-Trichlorobenzene 5.00 5.63 6.32 113 126 57.0-137 11.5 20 1,1,1-Trichloroethane 5.00 5.37 5.05 107 101 73.0-124 6.14 20 FSr 1,1,2-Trichloroethane 5.00 5.03 5.28 101 106 80.0-120 4.85 20 Trichloroethene 5.00 5.17 5.33 103 107 78.0-124 3.05 20 Trichlorofluoromethane 5.00 5.01 4.74 100 94.8 59.0-147 5.54 20 1,2,3-Trichloropropane 5.00 5.13 5.66 103 113 73.0-130 9.82 20 1,2,4-Trimethylbenzene 5.00 4.95 5.30 99.0 106 76.0-121 6.83 20 7G1 1,3,5-Trimethyl benzene 5.00 5.03 5.28 101 106 76.0-122 4.85 20 Vinyl chloride 5.00 4.82 4.36 96.4 87.2 67.0-131 10.0 20 o-Xylene 5.00 4.91 4.76 98.2 95.2 80.0-122 3.10 20 FAI m&p-Xylenes 10.0 10.3 9.63 103 96.3 80.0-122 6.72 20 (S) Toluene-d8 100 99.9 80.0-120 FSC (S) 4-Bromofluorobenzene 102 98.1 77.0-126 (S)1,2-Dich/oroethane-d4 109 110 70.0-130 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 18 of 21 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report FP1 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, FTC 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 FSS MDL Method Detection Limit. RDL Reported Detection Limit. rCn] Rec. Recovery. RPD Relative Percent Difference. FSr SDG Sample Delivery Group. Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and (S) Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be rqC detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte 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 Dilution standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the FAI 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 Limits for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or SC duplicated within these ranges. 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 J The identification of the analyte is acceptable; the reported value is an estimate. J4 The associated batch QC was outside the established quality control range for accuracy. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 19 of 21 ACCREDITATIONS & LOCATIONS Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey—NELAP TN002 California 2932 New Mexico TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina' DW21704 Georgia NELAP North Carolinas 41 Georgia' 923 North Dakota R-140 Idaho TN00003 Ohio—VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhodelsland LA000356 Kentucky16 KY90010 South Carolina 84004002 Kentucky 2 16 South Dakota n/a Louisiana A130792 Tennessee' ° 2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas' LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A21-A A21-A — ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A21-A — ISO 17025 s 1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA—Crypto TN00003 Drinking Water 2 Underground Storage Tanks 'Aquatic Toxicity ° Chemical/Microbiological 'Mold 6 Wastewater n/a Accreditation not applicable 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 Analytical. FP1 FTc FSS 4 Cn FSr Rc I ql FSC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Excel Civil & Environmental Associates 23056 L1449827 01/13/22 13:08 20 of 21 Ul9Z E C EA Huntsman Court Billing Information. Donna Farris man Cc 625onia,NC28054Huntsman tGastonia, NC 28054Gastonia, Analysis/Container/Preservative Chain or wswdy Page 1 of 1 1625 NC 28054*ESC 1 12065 Lebanon Road Mt Juliet, TN 37122 eport to: Aaron Long ail to: along@excelengr.com Phone: (B00) 767.5859 phone (615) 758 5856 Fax: (615) 75"859 L Project Description: Servco 00911 Concord Concord, NC Phone: 704-853-0800 FAX Client Project #: 23056EXCELENVR-23056 ey: Collected byC DeVane Site/Facility ID#: : 23056 = (lab use only) Template/Prelogin Shipped Via: Collected by (signature): Immed,atel' Packed on Ice N YCnb ID Rush? ( Lab MUST Be) SameDay....n6�i"QI NextDay... Day.....ofFAX? Comp/Grab Matdx' Grab GW Grab GW Grab GW WRe%ultsNeeded: Date Results Needed: No ECoCode Q ofTwo o QD ONSample Emailo No✓Yes ( No_Yes Date Time Remarks/Contaminant Sample#(lab only) 1-5-22 1510 3 x MW-8 1-5-22 1435 3 x C)� MW-9 1-5-22 1455 3 x O MW-10R Sam^le Y 1ei t Checkl-at %JV If A4P1==3_. —3C Seal Yreeenlntact:� y,_A Zecc Header=:-: .� �cc signed/Accurate: _/- 6'.ttlas arrive intact: Free. Cprro�r Garrett tottlea uaed: iq_N Sufficient volume aen: - ma/hr: /Y ti __ `Matrix: SS-SoiVSolid GW-Groundwater WW-WasteWater DW-Drinking Water OT-Other Remarks'. pH Temp _ Plow Other Relinquished by: (Si nature) Relinquished by: (S Date: Time: Received bSi : nature y (Signature) ) Received by: ( Samples resumed via: ❑ UPS �FedEx ❑Courser ❑ Condition: (lab use only) COC Seals Intad. _ Y _ N NA Date: T Time: Temp: D:77 r'� Bottles Receivetl: Relinquished by: ( )' _` Date: Time: d for lab bySignal ve�gnature) J Date: Time: pH Checked: NCF: (-P(,1 ey, 57W b" I Beverly, Trudy From: Beverly, Trudy Sent: Monday, January 31, 2022 9:17 AM To: Donna Farris Cc: 'Aaron Long' 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: Monday, January 31, 2022 9:15 AM To: Beverly, Trudy <trudy.beverly@ncdenr.gov> Cc: 'Aaron Long' <along@excelengr.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. Regards, Donna Farris Excel 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.