3402_HanesMill_MSWLF_LeachateReleaseResultsResponse_DIN26607_20160811

PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secretary

MICHAEL SCOTT
Director
State of North Carolina | Environmental Quality | Waste Management
Asheville Regional Office | 2090 US Highway 70 | Swannanoa, NC 28778
828 296 4500 T

August 11, 2016
Sent Via Email – [e-mail]

Mr. Ed Gibson
Winston-Salem City/County Utility Commission
325 Hanes Mill Road
Winston-Salem, NC 27105

Re: Soil and Surface Water Sampling and Analysis Report
Hanes Mill Road Landfill
Forsyth County
Solid Waste Permit Number 3402
DIN 26607

Dear Mr. Gibson:

The Solid Waste Section has completed a review of the Soil and Surface Water Sampling and Analysis
Report dated August 10, 2016 (DIN 26606) and submitted on behalf of the Winston-Salem/Forsyth County
City/County Utilities Commission by Golder Associates NC, Inc. for the Hanes Mill Road Landfill, Solid
Waste Permit Number 3402. The report was submitted in response to a leachate release that occurred
at the landfill and the approved Sampling Plan in Response to Leachate Response dated July 11, 2016 (DINs
26453 and 26454).

Subsurface soil sampling and surface water sampling was conducted on July 19, 2016 to evaluate the
extent of the potential environmental impacts from the release. The subsurface soil samples were
analyzed for Appendix I of 40 CFR 258 (Volatile Organic Compounds and Metals) and pH. In addition, two
surface water samples were collected from Grassy Creek. The surface water samples were analyzed for
Appendix I of 40 CFR 258 (Volatile Organic Compounds and Metals), BOD, COD, and chloride.

The analytical soil results indicated no volatile organic compounds exceeded the Preliminary Soil
Remediation Goals (PSRGs). In addition, cobalt, thallium, and vanadium were detected above their
Preliminary Soil Remediation Goals (PSRGs) for the Protection of Groundwater and the Residential Health
Based in all of the soil samples including the landfill’s background soil sample. Selenium was detected
above its Preliminary Soil Remediation Goals (PSRGs) for the Protection of Groundwater and the
Residential Health Based in two sample locations and in the landfill’s background soil sample. The
analytical surface water results indicated no exceedances of the NC 2B Surface Water Standards.

As a result, based upon the soil and surface water assessment conducted at the landfill, no additional
environmental assessment associated with this leachate release is required at this time. If you have any
questions or concerns regarding this letter, please feel free to contact me at 828.296.4706 or by email at
[e-mail]. Thank you for your cooperation with this matter.

Sincerely,

Jaclynne Drummond
Compliance Hydrogeologist
Solid Waste Section, Division of Waste Management
NCDEQ

cc sent via email: Jan McHargue, Winston-Salem/Forsyth County City/County Utilities Commission
Jason Watkins, Field Operations Branch Head
Deb Aja, Western District Supervisor
Susan Heim, Senior Environmental Specialist
Perry Sugg, Permitting Hydrogeologist
Ming Chao, Permitting Engineer
Dusty Reedy, Golder Associates NC, Inc.
Rachel Kirkman, Golder Associates NC, Inc.
Michael Plummer, HDR