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Home My WebLink About8202_SampsonCoMSWLF_20170719_GWMR14DayNotification Golder Associates NC, Inc. 5B Oak Branch Drive Greensboro, NC 27407 USA Tel: (336) 852-4903 Fax: (336) 852-4904 www.golder.com Engineering Lic. No. C-2862/Geology Lic. No. C-399 Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation July 19, 2017 Project No. 0739603717.200 Mr. Ervin Lane Department of Environmental Quality Division of Waste Management, Solid Waste Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 RE: 14-DAY NOTIFICATION AND ALTERNATE SOURCE DEMONSTRATION FOR CHROMIUM, COBALT, IRON, MANGANESE, AND VANADIUM SAMPSON COUNTY ACTIVE MSW AND C&D LANDFILLS, PERMIT NO. 82-02 SAMPSON COUNTY, NORTH CAROLINA Dear Ervin: On behalf of Waste Industries USA, Inc. (Waste Industries) and Sampson County, Golder Associates NC, Inc. (Golder) is submitting this 14-Day Notification as required by North Carolina Solid Waste Management Regulation (NCSWMR) 15A North Carolina Administrative Code (NCAC) 13B .1633(c)(1). The 14-Day Notification of Groundwater Protection Standard Exceedance(s) form is included as Attachment 1. 1.0 14-DAY NOTIFICATION [15A NCAC 13B .1633(C)(1)] Table 1 (shown below) summarizes the NC Appendix I constituents that were detected at concentrations above their respective Solid Waste Section Limits (SWSLs) and NC 2L Groundwater Standards or Solid Waste Section Groundwater Protection Standards (GWPSs) during the first Semi-annual Water Quality Monitoring Event conducted at the Sampson County active municipal solid waste (MSW) and construction and demolition (C&D) landfills on May 8 – 10, 2017. Note that the previously proposed site-specific groundwater protection standards (GPSs) were included in our January 16, 2017, 14-Day Notification and Alternate Source Demonstration (ASD). Monitoring wells MW-100B and MW-103A are upgradient / background wells for the MSW landfill; therefore, groundwater exceedances in samples from those wells are not evaluated further as these concentrations are naturally occurring. Laboratory certificates of analysis are submitted under separate cover. Table 1: 14-Day Notifications Constituent Location Total Result (µg/L) Dissolved Result (µg/L) SWSL (µg/L) NC2L or GWPS (µg/L) Approved ASD Previously Proposed GPS (ug/L) MSW FACILITY Barium MW-100B 812 -- 100 700 No -- Chromium MW-103A 21.2 -- 10 10 No -- Chromium MW-107S 38.0 -- 10 10 No 77.0 Cobalt MW-107S 37.7 -- 10 1 No 177 Cobalt MW-108 13.3 -- 10 1 No 48.2 Cobalt GGI-1 Outfall 37.9 -- 10 1 No -- Mr. Ervin Lane July 19, 2017 NC DEQ, Compliance Hydrogeologist 2 Project No. 0739603717 Constituent Location Total Result (µg/L) Dissolved Result (µg/L) SWSL (µg/L) NC2L or GWPS (µg/L) Approved ASD Previously Proposed GPS (ug/L) C&D FACILITY Chromium MW-4N 27.6 -- 10 10 No -- Chromium MW-5AN 17.0 -- 10 10 No 20.0 Cobalt MW-5AN 68.8 -- 10 1 No -- Vanadium MW-4N 26.6 ND 10 1 No -- Iron MW-2N 27100 -- 300 300 No 89743 Iron MW-3N 13200 -- 300 300 No -- Iron MW-4N 9570 -- 300 300 No 14812 Iron MW-5AN 3980 -- 300 300 No 6397 Iron MW-5BN 580 -- 300 300 No -- Manganese MW-2N 203 -- 50 50 No 396 Manganese MW-3N 275 -- 50 50 No 703 Note: µg/L = micrograms per liter, ND = not detected above laboratory detection limit, -- = no data available 2.0 ALTERNATE SOURCE DEMONSTRATION [15A NCAC 13B .1633(C)(3)] As allowed under 15A NCAC 13B .1633(C)(3), the Waste Industries prepared an ASD in reference to the concentrations of inorganic compounds reported in samples from monitoring wells from the active MSW landfill and the active C&D landfill during the second semi-annual water quality monitoring event of 2016 and proposed site-specific GPSs based on statistical analyses were established. The 14-Day Notification and ASD was submitted to the NC Department of Environmental Quality (DEQ) on January 16, 2017. The previously proposed site-specific GPSs that coincide with groundwater exceedances from the May 2017 event are provided above in Table 1. The groundwater exceedances reported in Table 1 that have previously proposed GPSs were reported at concentrations below their respective GPS. As allowed under 15A NCAC 13B .1633(C)(3), we have prepared an ASD in reference to the concentrations of chromium, cobalt, iron, manganese, and vanadium, which do not have previously proposed site-specific GPS The Summary of Statistical Analysis (Attachment 2) summarizes the statistical methods and results used to determine appropriate background concentrations for chromium, cobalt, iron, lead, and vanadium. The statistical analyses were completed using WQStat software in accordance with 40 CFR 258 and 15A NCAC 13B .1632(f) through (h). The statistical summary sheets generated during the statistical analysis are included with Attachment 2. Data from the active MSW landfill’s five upgradient wells (MW-100, MW-100A, MW-100B, MW-102A, and MW-103A) and the active C&D landfill’s one upgradient well (MW-1N) were used to perform inter-well statistical analysis to establish the background concentrations for these constituents. At the MSW facility, chromium was detected at MW-107S and cobalt was detected at MW-107S, MW-108 and GGI-1 Outfall at concentrations exceeding their respective SWSLs and groundwater standards. However, all concentrations are below the previously proposed GPSs, as presented in our January 16, 2017, 14-Day Notification and ASD, with the exception of cobalt at GGI-1 Outfall. The intra-well background statistical limit for cobalt at GGI-1 Outfall was based on the non-parametric prediction limit as allowed under Title 15A NCAC 13B .1632 (g)(3) and the concentration is below the statistically determined background value. Based on statistical background and similar or higher concentrations of chromium and cobalt at the upgradient wells historically and/or lack of increasing statistical trends, the data indicate that the concentrations detected in the samples from the downgradient wells are likely naturally occurring as evidenced by field data collected from the site upgradient wells. Mr. Ervin Lane July 19, 2017 NC DEQ, Compliance Hydrogeologist 3 Project No. 0739603717 At the C&D facility, chromium was detected at MW-4N and MW-5AN, cobalt was detected at MW-5AN, vanadium was detected at MW-4N, iron was detected at MW-2N, MW-3N, MW-4N, MW-5AN, and MW-5BN, and manganese was detected at MW-2N and MW-3N at concentrations exceeding their respective SWSLs and groundwater standards. However, all concentrations are below the previously proposed GPS as presented in our January 16, 2017, 14-Day Notification and ASD, with the exception of the following: chromium at MW-4N, cobalt at MW-5AN, vanadium at MW-4N, iron at MW-3N and MW-5BN. The inter-well background statistical limit was determined for iron at MW-5BN as allowed under Title 15A NCAC 13B .1632 (g)(3) and the concentration is below the statistically determined background value. The intra-well background statistical limits were determined for chromium at MW-4N, cobalt at MW-5AN, vanadium at MW-4N, iron at MW-3N as allowed under Title 15A NCAC 13B .1632 (g)(3) and the concentrations are below the statistically determined background values with the exception of vanadium at MW-4N. Based on statistical background and similar or higher concentrations of chromium, cobalt, iron and manganese at the upgradient wells historically and/or lack of increasing statistical trends, the data indicate that the concentrations detected in the samples from the downgradient wells are likely naturally occurring as evidenced by field data collected from the site upgradient wells. The vanadium concentration at the MW-4N was determined to be statistically significant over background. An additional sample from MW-4N was analyzed for dissolved vanadium analysis based on a relatively high turbidity recorded in the field during the May 2017 event (165 nephelometric turbidity units; field data submitted under separate cover). The dissolved vanadium results were non-detect and indicate that the total vanadium results are likely biased high by entrained sediment. We therefore recommend well re-development prior to the next scheduled compliance monitoring event. Based on the statistical analyses contained herein, we present the following proposed site-specific GPS for the aforementioned constituents based on statistically derived background concentrations as allowed under 15A NCAC 13B.1632(g): Table 2: Proposed Groundwater Protection Standards Detected Monitoring Constituent Monitoring Wells Proposed Groundwater Protection Standard Reporting Units MSW FACILITY Cobalt GGI-1 Outfall 40.4 ug/L C&D FACILITY Chromium MW-4N 71.1 ug/L Cobalt MW-5AN 25.8 ug/L Vanadium MW-4N 23.9 ug/L Iron MW-3N 79067 ug/L Iron MW-5BN 3540 ug/L Note: ug/L = micrograms per liter In addition to the statistical analysis and dissolved vanadium analysis, a desktop study was performed to determine the prevalence of chromium, cobalt, iron, manganese, and vanadium in soil and sediment in Sampson County. Data for 15 sediment samples from Sampson County were reviewed in the United States July 2017 Page 1 of 5 Attachment 3 Summary Table 0739603717 G:\PROJECTS\Waste Industries\Sampson County\Active MSW Landfill 82-02\0739603717 WI 2017 Sampson LF-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 day notification\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Cr (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 17.4 INAA 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 16.6 INAA 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 60.6 INAA 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 42.6 INAA 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 28.4 INAA 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 41.9 INAA 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 37.6 INAA 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 81 ICP40 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 15 ICP41 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 42 ICP42 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 36 NURE 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 26 ICP44 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 12 ICP45 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 30 ICP46 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 8 ICP47 Average 33.0 Notes: Source of chromium data is the United States Geological Survey National Geochemical Surey Database. Cr = Chromium, ppm = parts per million July 2017 Page 2 of 5 Attachment 3 Summary Table 0739603717 G:\PROJECTS\Waste Industries\Sampson County\Active MSW Landfill 82-02\0739603717 WI 2017 Sampson LF-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 day notification\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Co (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 5 NURE 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 0.552 INAA 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 17 NURE 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 10 NURE 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 7 NURE 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 1.33 INAA 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 10 NURE 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 5 NURE 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 0 INAA 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 0 INAA 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 0 INAA 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 5 NURE 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 0 INAA 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 7 NURE 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 10 NURE Average 5.2 Notes: Source of cobalt data is the United States Geological Survey National Geochemical Surey Database. Co = Cobalt, ppm = parts per million July 2017 Page 3 of 5 Attachment 3 Summary Table 0739603717 G:\PROJECTS\Waste Industries\Sampson County\Active MSW Landfill 82-02\0739603717 WI 2017 Sampson LF-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 day notification\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Fe (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 6700 NURE 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 2080 INAA 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 29800 NURE 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 8900 NURE 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 8000 NURE 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 10500 NURE 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 8300 INAA 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 5000 NURE 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 3600 ICP40 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 17700 NURE 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 10000 NURE 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 10800 NURE 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 3400 ICP40 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 8300 ICP40 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 9100 NURE Average 9478.7 Notes: Source of iron data is the United States Geological Survey National Geochemical Surey Database. Fe = Iron, ppm = parts per million July 2017 Page 4 of 5 Attachment 3 Summary Table 0739603717 G:\PROJECTS\Waste Industries\Sampson County\Active MSW Landfill 82-02\0739603717 WI 2017 Sampson LF-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 day notification\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Mn (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 54 ICP40 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 53 ICP40 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 130 NURE 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 112 ICP40 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 62 ICP40 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 290 NURE 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 116 ICP40 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 101 ICP40 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 150 NURE 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 230 NURE 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 200 NURE 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 204 ICP40 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 180 NURE 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 183 ICP40 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 150 NURE Average 147.7 Notes: Source of manganese data is the United States Geological Survey National Geochemical Surey Database. Mn = Manganese, ppm = parts per million July 2017 Page 5 of 5 Attachment 3 Summary Table 0739603717 G:\PROJECTS\Waste Industries\Sampson County\Active MSW Landfill 82-02\0739603717 WI 2017 Sampson LF-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 day notification\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude V (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 21 ICP40 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 12 ICP40 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 90 NURE 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 25 ICP40 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 27 ICP40 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 30 NURE 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 34 ICP40 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 20 ICP40 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 30 NURE 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 40 NURE 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 30 NURE 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 44 ICP40 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 30 NURE 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 45 ICP40 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 34 ICP40 Average 34.1 Notes: Source of vanadium data is the United States Geological Survey National Geochemical Surey Database. V = Vanadium, ppm = parts per million