NCS000076_ROS Approval_20230620

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
DOUGLAS R. ANSEL
Interim Director
Corning Incorporated
Attn: Carol B. Yates
Environmental Control Supervisor
310 North College Road
Wilmington, NC 28405
Dear Ms. Yates:
NORTH CAROLINA
Environmenta/Quality
June 20, 2023
Subject: NPDES Stormwater Permit
Permit No. NCS000076
Representative Outfall Status Request
Corning
New Hanover County
The Wilmington Regional Office staff have reviewed your request dated May 24, 2023 for a
determination that stormwater discharge outfall (SDO) 003 be granted representative outfall status
for stormwater outfall 008. We are approving this request. In accordance with 40 CFR
§122.21(g) (7), you are authorized to sample outfall number 003 as a representative outfall. This
approval is effective with the next sampling event. We also want to remind you that the permit still
requires Qualitative Monitoring be performed at all SDOsregardless of representative status.
Please remember that any actions you initiate in response to benchmark exceedances as directed in
the tiered response provisions of your permit must address all drainage areas represented by SDO
003, where appropriate.
Please append this letter to your Stormwater Pollution Prevention Plan (SPPP) or permit to
document that representative outfall status has been approved. If changes in drainage areas,
structures, processes, storage practices, or other activities occur that significantly alter the basis of
this approval, representative outfall status may no longer be valid. You should either resume
sampling at all SDOs, or reapply to this office for representative outfall status based on updated
information.
If you have any questions or comments concerning this letter, please contact Brian Lambe at (910)
796-7215 or at [e-mail]
Sincerely,
Daniel Sams, E
Regional Supervisor
cc: Stormwater Program Permit File
D_EQ�Z North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796.7215