WQ0003698_Site Assessment scope of work and schedule approval_20231206

North Carolina Department of Environmental Quality | Division of Water Resources
Asheville Regional Office | 2090 U.S. Highway 70 | Swannanoa, North Carolina 28778
828.296.4500

December 6, 2023

J. Robert Boyette – City Manager
City of Marion
P.O. Drawer 700
Marion, NC 28752

Subject: Corpening Creek Surface Disposal Units
Approval of Site Assessment Scope of Work and Schedule
Permit No. WQ0003698
McDowell County

Mr. Boyette,

On May 2, 2023, the North Carolina Division of Water Resources (DWR) Asheville Regional Office (ARO)
received a scope of work and schedule to address the site assessment requirements for your
wastewater residuals surface disposal units (SDU) as outlined in the March 2, 2023 Notice of Violation
(NOV-2022-LV-0130) and your renewed Non-discharge Permit WQ0003698. The proposed scope of work
and schedule are divided into the following phases:

• July 2023 to June 2024: Phase 1 – Initial Risk-Based Assessment
• July 2024 to June 2025: Phase 2 - Initial Land Clearing and Geophysics
• July 2025 to June 2026: Phase 3 - Preliminary Surface Disposal Unit Assessment
• July 2026 to June 2027: Phase 4 – Assess Remaining Surface Disposal Units

DWR ARO approves the scope of work and schedule as outlined above but with some caveats. You will
need to develop a separate scope of work and schedule for the assessment and disposal of the metal
fuel tank observed in Pit A-1 (see attached map and photo). You will also be required to provide a
quarterly progress report to DWR ARO for the duration of the project.

You’re encouraged to begin the Phase 1 assessment as soon as possible. Do not hesitate to contact me if
you have any questions or concerns. I can be reached at [phone] or at [e-mail].

Sincerely,

Brett Laverty
Water Quality Regional Operations
Asheville Regional Office
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SDU 2
Pit A -1
Pit B
Pit C
Pit A-2SDU 4, 5, 6 & 7
SDU 3
SDU 8 & 9
SDU 10
Pit G-1
Pit D
Pit F-1
Pit F-2
Pit H
Location of Past WWT Aerator
Pit G-2
Pit G-3
SDU 11 Pre-1981 Disposal Area
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Publish Date: 2023/03/09, 11:24 AM | User: cpippin
Filepath: Q:\Jobs\City_of_Marion_NC_2746\Maps\Fig2_SitePlan_cgp.mxd
NOTES:1. SDU: Surface Diposal Unit2. Unpermitted SDUs identified during Anchor QEAfield reconnaissance performed on December 21, 2022,by review of historical aerial photographs, and reviewof locations from the North Carolina Department ofEnvironmental Quality (DEQ).
Figure 2
Site Layout
Surface Disposal Unit - Permit No. WQ0003698
City of Marion
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Compliance Boundary
City of Marion Property Boundary
Surface Water
Access Road
Unpermitted SDU
Permitted SDU
Cross-Section Reference Line
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Metal fuel tank observed in Pit A-1 (October 2021)