2001_CherokeeCoMSWLF_GWAssmtRptAppr_FID1901267_20241010

October 10th, 2024

Sent Via Email: [e-mail]

Mr. Robert Ward
Cherokee County Solid Waste Director
75 Peachtree Street
Murphy, North Carolina 28906

Re: Water Quality Assessment Report
Cherokee County Closed MSW Landfill
Permit# 2001-MSWLF-1990
FID 1901267

Dear Mr. Ward:

The Solid Waste Section (Section) has reviewed the Water Quality Assessment Report (FID 1893457)
submitted by Municipal Engineering, Inc. (MESCO) on behalf of Cherokee County. The Assessment was
conducted in accordance with the Assessment Workplan (FID 1818164) approved by the Section on
September 27th, 2023. Cobalt, 1,4-dichlorobenzene, benzene, and 1,4-dioxane exceedances were
reported in downgradient monitoring wells and MESCO installed additional downgradient monitoring
wells to define the horizontal extent of groundwater contamination. Monitoring well MW-8 was installed
downgradient of MW-4R, MW-9 was installed downgradient of MW-5, and MW-10 was installed
downgradient of MW-1. All three monitoring wells were installed at the compliance boundary and
samples were analyzed for constituents listed in 40 CFR 258 Appendix II and 1,4-dioxane. Cobalt was the
only constituent reported above the 2L Standard at concentrations of 13 ppm in MW-8 and 4.1 ppm in
MW-10.

Based on the lack of volatile organic compound exceedances in the newly installed monitoring wells,
MESCO concluded that the horizontal extent of groundwater contamination has been defined and the
installation of additional monitoring wells beyond the compliance boundary is not necessary at this time.
The Section approves MESCO’s recommendation and additional assessment beyond the compliance
boundary is not required based on current site conditions. Please contact me at [phone] or by e-
mail at [e-mail] if you have any questions or concerns regarding this letter. Thank you in
advance for your cooperation with this matter.

Sincerely,

Ervin Lane
Hydrogeologist
Solid Waste Section, Division of Waste Management
NCDEQ

cc sent via email: Perry Sugg, P.G. – SWS Environmental Compliance Branch Head
Lee Hill – SWS Environmental Senior Specialist
Jay Zimmerman, P.G. – Municipal Engineering, Inc.
Jonathan Pfohl – Municipal Engineering, Inc.