3402_Forsyth_HanesMillRoad_MSWLF_MonitoringRequest_FID1405297_20200504

J GOLDER
May 4, 2020
Ms. Jackie Drummond
North Carolina Department of Environmental Quality
Division of Waste Management - Solid Waste Section
2090 US Highway 70
Swannanoa, North Carolina 28778
Via Email: [e-mail]
Project No. 19117535
REQUEST TO DISCONTINUE ANALYSIS OF 1,4-DIOXANE
HANES MILL ROAD LANDFILL - CLOSED AND ACTIVE SUBTITLE D LANDFILLS, PERMIT NO. 34-02
FORSYTH COUNTY, NORTH CAROLINA
Dear Jackie:
On behalf of the Winston-Salem/Forsyth County City/County Utilities Commission (CCUC), Golder Associates
NC, Inc. (Golder) is submitting this request for the Closed and Active Subtitle D landfills at the above -referenced
facility. During the December 11 - 14, 2018, March 4 - 7, 2019, September 23 - 25, 2019, and March 2 - 5, 2020,
sampling events, the constituent 1,4-dioxane was analyzed for required groundwater and surface water samples
as requested in the May 29, 2018, memorandum from the Solid Waste Section.
As reported in our March 18, 2019, June 26, 2019, January 17, 2020, and May 4, 2020, semi-annual water quality
monitoring reports, 1,4-dioxane was not present in any groundwater or surface water samples during the four
events at the active Subtitle D landfill. At the closed Subtitle D landfill, 1,4-dioxane was detected at an estimate
concentration in the sample from well MW-11 during the December 2018 event, but has not been detected in
samples from the well during the last three monitoring events. 1,4-dioxane was also, detected in sample from
MW-7, MW-8, and MW-9 during the September 2019 event, but as described in the January 17, 2020, water
quality monitoring report, the detections are suspected laboratory artifacts. 1,4-dioxane was not detected in
samples from MW-7, MW-8, and MW-9 during the September 2019 event. 1,4-dioxane has been detected in
downstream surface water point SW-4 at concentrations below the surface water standard. Note that SW-4 is
also monitored as part of the network for the closed unlined landfill and 1,4-dioxane has been detected at one or
more downgradient wells for the unlined facility.
Based on the results presented herein, we are respectfully requesting that 1,4-dioxane be omitted during future
compliance sampling events for groundwater and surface water samples at the active Subtitle D landfill and for
groundwater samples from the closed Subtitle D landfill.
Should you have any questions or require additional information, please do not hesitate to contact the undersigned
at [phone]. We appreciate your assistance with this project and consideration of this request.
Golder Associates NC, Inc.
5B Oak Branch Drive, Greensboro, North Carolina, USA 27407
T: [phone] F: [phone]
Engineering Lic. No. C-2862/Geology Lic. No. C-399
Golder Associates NC, Inc. is a licensed user of the Golder trademark, and an associated operating entity.
Golder and the G logo are trademarks of Golder Associates Corporation. golder.com

Ms. Jackie Drummond
North Carolina Department of Environmental Quality
Sincerely,
Golder Associates NC, Inc.
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Project No. 19117535
May 4, 2020
David "Dusty" Y. Reedy II, PG Rachel P. Kirkman, PG
Senior Hydrogeologist Associate and Senior Consultant
CC: Adam Rickett, Senior Project Supervisor, Winston-Salem/Forsyth City/County Utilities Commission,
325 Hanes Mill Road, Winston-Salem, NC 27105. 336-661-4900. [e-mail].
Gordon Dively, PE, Solid Waste Operations Manager, Winston-Salem/Forsyth City/County Utilities
Commission, 325 Hanes Mill Road, Winston-Salem, NC 27105. 336-661-4900.
[e-mail].
Mike Plummer, PE, HDR, 440 South Church Street, 10th Floor, Charlotte, NC 28202, 704 338
6719. Michael. [e-mail]. (electronic copy)
https://golderassociates-sharepoint.com/sites/123522/19117535 20192020 fy/phase 400, 401. 402 - 1st sa wqm event/200 deliv/252 final issued/191117535.400-002-1-reva-1,4-
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