The URL can be used to link to this page

Home My WebLink About8201_SampsonClosedMSW_July2017_14DayNotificationandASD_20170719 Golder Associates NC, Inc. 5B Oak Branch Drive Greensboro, NC 27407 USA Tel: (336) 852-4903 Fax: (336) 852-4904 www.golder.com Golder Associates: Operations in Africa, Asia, Australasia, Europe, North America and South America Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation July 19, 2017 Project No. 0739603817 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, LEAD, AND NICKEL SAMPSON COUNTY CLOSED MSW LANDFILLS, PERMIT NO. 82-01 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 Closed MSW Landfill on May 9 - 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 well MW-14A is an upgradient / background wells for the MSW landfill; therefore, the groundwater exceedance at that well is not evaluated further as the concentration is naturally occurring. Laboratory certificates of analysis are submitted under separate cover. Table 1: 14-Day Notifications Constituent Location Total Result (µg/L) Re- Analysis Result (µg/L) Dissolved Result (µg/L) SWSL (µg/L) NC2L or GWPS (µg/L) Ap-proved ASD Previously Proposed GPS (ug/L) Chromium MW-15 157 35.0 ND 10 10 No -- Cobalt MW-14A 15.4 -- -- 10 1 No -- Cobalt MW-10 32.3 -- -- 10 1 No 100 Cobalt MW-12 22.3 -- -- 10 1 No 100 Cobalt MW-15 1280 60.9 J 8.60 J 10 1 No 688 Lead MW-13 127 5.17 J ND 10 15 No -- Nickel MW-15 171 29.0 J 4.32 J 50 100 No -- Notes: µg/L = micrograms per liter, J = estimated value below the SWSL, ND = not detected above laboratory detection limit, -- = no data available Mr. Ervin Lane July 19, 2017 NC DEQ, Compliance Hydrogeologist 2 Project No. 0739603817 2.0 ALTERNATE SOURCE DEMONSTRATION [15A NCAC 13B .1633(C)(3)] As allowed under 15A NCAC 13B .1633(C)(3), Waste Industries prepared an ASD in reference to the concentrations of inorganic compounds reported in samples from monitoring wells from the closed MSW 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, lead, and nickel, 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, lead, and nickel. 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 closed MSW landfill’s three upgradient wells (MW-11, MW-14, and MW-14A) were used to perform inter-well statistical analysis to establish the background concentrations for these constituents. The concentrations of cobalt at MW-10 and MW-12 during this event are below the previously proposed GPSs, as presented in our January 16, 2017, 14-Day Notification and ASD. The original concentration of cobalt at MW-15 is above the previously proposed GPS. Statistically derived backgrounds were determined to establish GPS for chromium and nickel at MW-15 and lead at MW-13. The intra-well background statistical limits were established using non-parametric prediction limits as allowed under Title 15A NCAC 13B .1632 (g)(3) for lead at MW-13 and nickel at MW-15. Statistically significant increases over background were noted for cobalt and nickel at MW-15 and lead at MW-13. Verification sampling was performed on June 23, 2017, to confirm the original concentrations of cobalt and nickel at MW-15 and lead at MW-13. The results for the verification samples indicate that the lead, and nickel concentrations are estimated below the SWSLs and newly proposed statistical background limits; the cobalt concentration is estimated below the previously proposed site-specific GPS. Therefore, the original concentrations for the aforementioned constituents are considered suspect based on historical data. Also, dissolved metals concentrations were non-detect or estimated values lower than total values for cobalt, lead, and nickel during the verification event, which suggests that entrained sediment may bias total metals results high. 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. Based on the statistical analyses contained herein, we present the following site-specific GPS for the aforementioned constituents based on statistically derived background concentrations: Table 1: Proposed Groundwater Protection Standards Detected Monitoring Constituent Monitoring Wells Proposed Groundwater Protection Standard Reporting Units Chromium Downgradient MSW wells 753 ug/L Lead MW-13 126 ug/L Nickel MW-15 55.9 ug/L Note: ug/L = micrograms per liter July 2017 1 of 1 Project No. 0739603817 G:\PROJECTS\Waste Industries\Sampson County\Closed MSW and C&D Landfill 82-01\0739603817 WI 2017 Sampson Closed-NC\Phase 100 WQMR\600 Calculations\Stats\Stats_Summary_May 2017.xlsx NC 2L GWPS Interwell Intrawell Chromium ug/L 10 --MW-15 157 35.0 ND --753 --Below Statistically Calculated Background 753 MW-10 32.3 --------Below Proposed GPS -- MW-12 22.3 --------Below Proposed GPS -- MW-15 1280 60.9 J 8.60 J 688 105 688 Verification Concentration Below Proposed GPS -- Lead ug/L 15 --MW-13 127 5.17 J ND --125 126 Verification Concentration Below Statistically Calculated Background 126 Nickel ug/L 100 --MW-15 171 29.0 J 4.32 J --41.8 55.9 Verification Concentration Below Statistically Calculated Background 55.9 Notes:1. Statistical worksheets are provided as Appendix C. 2. ug/L = micrograms per liter 3. NC 2L = North Carolina 2L Groundwater Standard 4. GWPS = North Carolina Solid Waste Section Groundwater Protection Standard5. SSI = statistically significant increase 6. ND = not detected above laboratory detection limit7. J = estimated concentration below the Solid Waste Section Limit 8. -- = not available Sampson County, North Carolina Sampson County Closed Landfill, Permit No. 82-01 Summary of Statistical Analysis Closed MSW Landfill Newly Proposed GPS Verification Constituent Concentration ug/L --1 May 2017 9. North Carolina Appendix I Inorganic constituents detected above their respective Solid Waste Section Reporting Limit and Groundwater Standard in samples from downgradient monitoring wells were statistically evaluated. Statistical Determination Verification Constituent Concentration (Dissolved) Detected Monitoring Constituent Reporting Units Groundwater Standard Downgradient Monitoring Well Constituent Concentration Statistical AnalysisPreviously Proposed GPS 100Cobalt July 2017 Page 1 of 4 Attachment 3 Summary Table 0739603817 G:\PROJECTS\Waste Industries\Sampson County\Closed MSW and C&D Landfill 82-01\0739603817 WI 2017 Sampson Closed-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 Day Notification & ASD\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 4 Attachment 3 Summary Table 0739603817 G:\PROJECTS\Waste Industries\Sampson County\Closed MSW and C&D Landfill 82-01\0739603817 WI 2017 Sampson Closed-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 Day Notification & ASD\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 4 Attachment 3 Summary Table 0739603817 G:\PROJECTS\Waste Industries\Sampson County\Closed MSW and C&D Landfill 82-01\0739603817 WI 2017 Sampson Closed-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 Day Notification & ASD\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Pb (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 23 ICP40 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 15 ICP40 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 37 ICP40 4 5287231 C-116843 08/05/17 Sediment NAD27 35.0336 -78.198 28 ICP40 5 5287244 C-116848 08/06/77 Sediment NAD27 35.1824 -78.4552 28 ICP40 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 23 ICP40 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 27 ICP40 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 11 ICP40 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 17 ICP40 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 13 ICP40 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 12 ICP40 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 19 ICP40 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 17 ICP40 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 28 ICP40 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 14 ICP40 Average 20.8 Notes: Source of lead data is the United States Geological Survey National Geochemical Surey Database. Pb = Lead, ppm = parts per million July 2017 Page 4 of 4 Attachment 3 Summary Table 0739603817 G:\PROJECTS\Waste Industries\Sampson County\Closed MSW and C&D Landfill 82-01\0739603817 WI 2017 Sampson Closed-NC\Phase 100 WQMR\200 DELIV\202 Draft Issued\14 Day Notification & ASD\SampsonSoils.xlsx Sample #NURE ID Lab ID Sample Date Type Datum Latitude Longitude Ni (Max) Concentration (ppm)Method 1 5285076 C-110126 08/23/77 Sediment NAD27 34.7692 -78.3302 9 INAA 2 5287260 C-110757 08/22/77 Sediment NAD27 35.1322 -78.4805 12 NURE 3 5287253 C-116836 08/09/77 Sediment NAD27 35.1684 -78.3 23 INAA 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 12 NURE 6 5285071 C-116849 08/23/77 Sediment NAD27 34.6643 -78.207 17 NURE 7 5287233 C-116859 08/05/77 Sediment NAD27 35.0972 -78.2232 17 NURE 8 5287265 C-143266 08/12/77 Sediment NAD27 35.0121 -78.4869 17 NURE 9 5287267 C-143512 08/12/77 Sediment NAD27 35.0593 -78.5923 15 NURE 10 5285068 C-143541 08/23/77 Sediment NAD27 34.7109 -78.2799 7 NURE 11 5285079 C-143896 08/24/77 Sediment NAD27 34.8709 -78.2028 ---- 12 5287258 C-210823 08/11/77 Sediment NAD27 35.0902 -78.3791 22 NURE 13 5287272 C-210858 08/22/77 Sediment NAD27 35.2287 -78.5624 12 NURE 14 5285056 C-210879 08/03/77 Sediment NAD27 34.8494 -78.439 20 NURE 15 5287236 C-210892 08/05/17 Sediment NAD27 35.1688 -78.1742 15 NURE Average 14.9 Notes: Source of nickel data is the United States Geological Survey National Geochemical Surey Database. Ni = Nickel, ppm = parts per million