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C 114 Edinburgh S. Drive,Ste.200 T 919.827.0864
�� Cary, NC 27511 TRCcompanies.com
October 29, 2024
Mr. Jeff Morrison
Environmental Program Manager, Remediation
Colonial Pipeline Company
3925 Anderson Farm Road
Austell, Georgia 30106
Re: Colonial Pipeline SR 2448/Pipeline ROW
NPDES Permit No. NC0090000
Site Mitigation Plan Quarterly Report 3Q2024
Huntersville, North Carolina
Dear Mr. Morrison:
This Quarterly Site Mitigation Report for reporting period July 2024—September 2024 (3Q2024) has been prepared
as required by National Pollution Discharge Elimination System (NPDES) Permit No. NC0090000, Section A.9.b.(i)
for the Colonial Pipeline Company (CPC) Huntersville-Concord Road (State Road 2448 [SR 2448]) pipeline release
site located near Huntersville, Mecklenburg County, North Carolina (Site).
The on-site water treatment system construction has not yet begun, and the system is therefore not operational at
this time. As such, there are no nuisance conditions (noise, odor, or vapors) associated with water treatment that
need to be mitigated at this time.
Construction of stormwater control measures began at the Site on August 19, 2024 in accordance with the
approved Town of Huntersville (Town) Land Development Plans and existing Land Disturbance Permit(MECK
2023-030) issued by the North Carolina Department of Environmental Quality (NCDEQ), Activities completed to
date, include the following:
• Installation of temporary construction entrance, silt fence, silt fence gravel outlets, and other construction
related best management practices (BMPs).
• Construction of dry pond, riprap, stormwater outfall, and erosion control blanket.
After the above listed stormwater control measures and BMPs were installed at the Site, construction activities
associated with the vapor extraction portion of the proposed remedy were initiated. These activities include
installation of subsurface utilities (i.e., natural gas), cable tray footers, and underground piping. Construction has
been limited to the portion of the Site that is located south of SR 2448 due to ongoing negotiations with
Mecklenburg County for long term access to the Oehler Preserve. At this time, construction activities are
anticipated to continue into 2025.
If have any questions or require additional information, please do not hesitate to contact me at (845) 853-5388 or
by e-mail at cmacionus@trccompanies.com.
Sincerely,
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Chelsea Macionus
Project Manager