0501_AsheCoLF_Phase3DesignHydroAddendum_Appr1832040_20240318

March 18th, 2024

Sent Via Email: [e-mail]
Mr. Scott Hurley
Ashe County
Department of Environmental Services Director
P.O. Box 1327
West Jefferson, North Carolina 28694

Re: Design Hydrogeologic Report Addendum
Ashe County Unlined Closed Landfill
Permit# 0501-MSWLF-1980
FID 1832040

Dear Mr. Hurley:

The Solid Waste Section (Section) has reviewed the Ashe County Design Hydro Report Addendum (FID
1826368) for the facility’s closed unlined MSW landfill submitted on behalf of Ashe County by Municipal
Engineering, Inc. (MESCO). The initial Design Hydrogeologic Report was conditionally approved on
February 17, 2009, on the basis that it satisfied the rule requirements, but construction of Phase 3 could
not begin due to the need to further assess groundwater contamination upgradient and at the southern
edge of Phase 3. In the interim, MESCO conducted remedial activities, additional assessment, and
continued groundwater monitoring in the area of concern. The Section issued correspondence (FID
1817023) on August 29, 2023 to Ashe County stating that groundwater contamination in the area of
concern had been adequately addressed and was no longer an impediment to Phase 3 expansion.

During assessment and corrective action activities, additional wells were installed within the Phase 3
footprint and information collected during their installation was used to supplement the findings of the
initial design hydrogeologic report. Additional groundwater elevation measurements collected during the
remediation and assessment process were used to confirm the minimum required four feet of separation
between the proposed Phase 3 base grade and seasonal high groundwater table and top of bedrock.

This correspondence serves as final approval of the Design Hydrogeologic Report for Phase 3 and Ashe
County may proceed accordingly. Please contact me at [phone] or by e-mail at
[e-mail] if you have any questions or concerns regarding this letter. Thank you for your
cooperation in 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
Sherri Stanley – SWS Permitting Branch Head
Allen Gaither, P.E. – SWS Permitting Engineer
Charles Gerstell – SWS Environmental Senior Specialist
Jay Zimmerman, P.G. – Municipal Engineering, Inc.