4501_Henderson_MSWLF_CDLF_14DayNotification_DIN28774_20180215

Golder Associates NC, Inc. 5B Oak Branch Drive Greensboro, NC 27407 USA Tel: [phone] Fax: [phone] 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
February 15, 2018 0839650617.101
Ms. Jaclynne Drummond Compliance Hydrogeologist
North Carolina Department of Environmental Quality Division of Waste Management – Solid Waste Section
2090 US Highway 70 Swannanoa, North Carolina 28778
[phone]
RE: 14-DAY NOTIFICATION ASND ALTERNATE SOURCE DEMONSTRATION FOR COBALT
CLOSED HENDERSON COUNTY LANDFILL, PERMIT NO. 45-01
HENDERSON COUNTY, NORTH CAROLINA
Dear Jackie:
On behalf of Henderson 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.
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 (GPSs) during the second semi-annual water quality monitoring event conducted at the closed municipal solid waste (MSW) landfill on September 19 - 20, 2017,
a surface water re-sampling event on October 2, 2017, and a verification sampling event on December 19, 2017. The laboratory certificates-of-analyses are submitted under separate cover. It is noted that the
closed MSW landfill is in corrective action for volatile organic compounds (VOCs); therefore no notifications for groundwater standard exceedances for VOCs are required for this facility.
Table 1: 14-Day Notification
Constituent Location
Total
Result
(µg/L)
Verification
Total
Result
(µg/L)
Verification
Dissolved
Result
(µg/L)
SWSL
(µg/L)
NC2L
or GPS
(µg/L)
Approved
ASD
Cobalt MW-8 10.4 10.3 10.5 10 1 No
Notes: µg/L = micrograms per liter
A desktop study was performed to determine the prevalence of cobalt in soil and sediment in the general
proximity of the Henderson County MSW Landfill. Twenty sediment samples collected within 25 miles of the Henderson County MSW Landfill were present in the United States Geological Survey (USGS) National
Geochemical Survey Database (presented in Attachment 2). As shown, cobalt concentrations range from
non-detect to 16 parts-per-million (ppm). While a direct comparison between sediment sample concentrations and groundwater concentrations cannot be made, these data show that cobalt does occur naturally in stream sediment. Therefore, are likely to occur in subsurface soil at the Henderson County
MSW Landfill at concentrations that would account for the concentrations of these constituents in
groundwater.
Unless otherwise directed by NC DEQ, the County will continue monitoring the uppermost aquifer beneath
the closed MSW landfill in accordance with the requirements of the Assessment Monitoring Program as
February 2018 1 of 1 0839650617.101
G:\PROJECTS\Henderson County\0839650617\Phase 101 - 2nd SQ WQMR 2017\200 DELIV\252 Final Issued\14-Day Notification\Attachment 4.xlsx
NURE
Record ID Lab ID
Collection
Date Datum Latitude Longitude Medium Source Units Cobalt
5287765 C-110024 06/03/76 NAD27 35.3919 -82.4395 Sediment Stream ppm ND
5288276 C-110099 06/04/76 NAD27 35.2858 -82.2908 Sediment Stream ppm 4
5288402 C-110164 08/03/76 NAD27 35.2925 -82.6996 Sediment Stream ppm 4
5287509 C-110206 06/07/76 NAD27 35.6083 -82.4171 Sediment Stream ppm 11
5288425 C-110285 08/03/76 NAD27 35.2003 -82.8557 Sediment Stream ppm 4
5287782 C-110313 06/04/76 NAD27 35.3999 -82.6317 Sediment Stream ppm 6
5287813 C-110459 06/07/76 NAD27 35.3505 -82.8203 Sediment Stream ppm 8
5288593 C-142453 07/08/76 NAD27 35.0267 -82.6374 Sediment Stream ppm 5
5287493 C-143098 06/06/76 NAD27 35.4751 -82.6388 Sediment Stream ppm 9
5287791 C-143172 06/05/76 NAD27 35.4303 -82.6555 Sediment Stream ppm 8
5287574 C-143236 06/09/76 NAD27 35.6346 -82.4159 Sediment Stream ppm 16
5287825 C-143564 06/07/76 NAD27 35.4695 -82.8924 Sediment Stream ppm 11
5288393 C-143759 08/03/76 NAD27 35.3832 -82.7216 Sediment Stream ppm 8
5287780 C-143901 06/04/76 NAD27 35.3899 -82.5668 Sediment Stream ppm 6
5287534 C-143909 06/07/76 NAD27 35.5901 -82.6262 Sediment Stream ppm 12
5288412 C-144004 08/03/76 NAD27 35.2523 -82.8528 Sediment Stream ppm 7
5288288 C-210857 06/05/76 NAD27 35.5212 -82.1979 Sediment Stream ppm 9
5287506 C-210895 06/07/76 NAD27 35.641 -82.3088 Sediment Stream ppm 10
5287739 C-210903 06/03/76 NAD27 35.2585 -82.5017 Sediment Stream ppm 3
5287472 C-210906 06/05/76 NAD27 35.4504 -82.474 Sediment Stream ppm 4
Average 7
Notes:
1. NURE = National Uranium Resource Evaluation
2. ID = identification
3. ND = non-detect
4. Inorganic analysis performed by ICP40.
5. ppm = parts per million
6. Sample locations are within 25 miles of the Henderson County MSW Landfill
7. Source of data is the United States Geological Survey National Geochemical Survey Database.
ATTACHMENT 2
USGS National Geochemical Survey Database Summary
Henderson County MSW C&D Landfill, Permit No. 45-01
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236021802160 2160HENDERSONCOUNTY BUS DEPOTMAINTENANCEFACILITYTRANSFERSTATIONCONVENIENCECENTERCLOSED C&DLANDFILLLOCATED ONMSW AREACLOSED MSWLANDFILLCLOSED WOODWASTE ANDWHITE GOODSACTIVITYCENTERHENDERSONCOUNTY HUMANESOCIETYCLOSED TVADISPOSAL AREASCALE HOUSEiCLOSEDDEMOLITIONLANDFILL AREA3CLOSED C&DLANDFILLiPOST 1991AREA2i1MW-10MW-13MW-12MW-11MW-92210.24MW-82189.65MW-7<2186.84MW-62329.64MW-5BR-1BR-2BR-32178.54AMW-1S2175.63AMW-1D2173.05CONVENIENCECENTERAMW-2DAMW-2SMW-2MW-1OLD MW-12366.74OLD MW-22200.712199.402169.10MP-3TR-3MP-42178.19MP-6IW-1MP-1SW-1MP-92247.422249.082257.412242.772174.002171.78LFG-101LFG-102LFG-103TR-2MP-7MP-80 1 in0839650617PHASE101FIGURE10 2018/01/02ACWWBBDYRRPKHENDERSON COUNTY CLOSED MSW AND C&D LANDFILLPERMIT # 45-01HENDERSON COUNTYGROUNDWATER SURFACE CONTOUR MAPSEPTEMBER 20, 2017TITLEPROJECT NO.REV.PROJECTCLIENTCONSULTANTPREPAREDDESIGNEDREVIEWEDAPPROVEDYYYY-MM-DDPath: \\greensboro\CAD\_2008\08396506 - Henderson\PRODUCTION\_J - 2017 GW Monitoring Report\ | File Name: 0839650617-002 Groundwater Surface Contour Map - September 20, 2017.dwg
IF THIS MEASUREMENT DOES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ANSI D EXISTING 10 FT. CONTOUREXISTING 2 FT. CONTOURPROPERTY LINELIMITS OF WASTESTREAMBUFFERTREELINEEXISTING ROADFENCEGROUNDWATER SURFACE CONTOURSAPPROXIMATE GROUNDWATER FLOW SEGMENT USED TO CALCULATE GRADIENTCOMPLIANCE GROUNDWATER MONITORING WELL AND IDENTIFICATIONNON COMPLIANCE GROUNDWATER MONITORING WELL AND IDENTIFICATIONCOMPLIANCE METHANE MONITORING WELL AND IDENTIFICATIONASSESSMENT COMPLIANCE METHANE MONITORING WELL AND IDENTIFICATIONSURFACE WATER MONITORING POINT AND IDENTIFICATIONINJECTION WELL AND IDENTIFICATIONNOT MEASUREDLEGENDNOTESREFERENCESi1MW-8MP-8BR-1MW-12210.241. TOPOGRAPHIC CONTOUR INTERVAL = 2 FEET2. GROUNDWATER SURFACE CONTOUR INTERVAL = 20 FEET3. GROUNDWATER ELEVATIONS MEASURED ON SEPTEMBER 20, 2017.4. GROUNDWATER CONTOURS BASED ON LINEAR INTERPOLATION BETWEEN AND EXTRAPOLATION FROM KNOWNDATA, TOPOGRAPHIC CONTOURS, AND KNOWN FIELD CONDITIONS. THEREFORE GROUNDWATER CONTOURSMAY NOT REFLECT ACTUAL CONDITIONS.5. GROUNDWATER CONTOUR LINES SHOW THE WATER TABLE SHAPE AND ELEVATION. THESE CONTOURS AREINFERRED LINES FOLLOWING THE GROUNDWATER SURFACE AT A CONSTANT ELEVATION ABOVE SEA LEVEL6. COORDINATE SYSTEM IS N.C. STATE PLANE GRID.7. TOPOGRAPHIC DIVIDING LINE DIVIDES THE BASE MAP TOPOGRAPHIC CONTOURS FROM LANDSATTOPOGRAPHIC CONTOURS. LANDSAT TOPOGRAPHIC CONTOURS HAVE A 5-CONTOUR INTERVAL.8. LOCATION OF COMPLIANCE METHANE MONITORING WELL MP-4 IS APPROXIMATE.1. BASE MAP PROVIDED BY CAMP DRESSER & McKEE FROM PREVIOUS WATER QUALITY MONITORING REPORTS.0FEET200 400SCALENMIW-12199.402178.19MP-6GOLDER ASSOCIATES NC, INC.