NCS000590_PGM Tier II Notification SW009_20240311

DUKE Brunswick Nuclear Plant
8470 River Road SE
ENERGY,, Southport, NC 28461
MAR 0 7 2024
Serial: RA-24-0079
Mr. Dan Sams, Regional Engineer
NC DEQ DEMLR—Wilmington Regional Office
127 Cardinal Drive
Wilmington, North Carolina 28405
Reference: Duke Energy Carolinas, LLC — Brunswick Steam Electric Plant
Industrial Stormwater NPDES Permit No. NCS000590
Tier II Required Response/Action
Brunswick County, North Carolina
Dear Mr. Sams,
Please accept this letter as the two-week written notification as required by Part D, Condition D-
6, Table 3 (iii) regarding the industrial stormwater system serving the Brunswick Steam Electric
Plant.
On February 12, 2024, quarterly stormwater samples were collected and analyzed in
accordance with NCS000590. Analytical results for ISWO09 outfall were received by Duke
Energy on March 5, 2024. Upon review of the results, it was observed that the benchmark for
Aluminum was exceeded. The benchmark for Aluminum is 240 lag/L and the analytical result
was 549 lag/L. This is the second consecutive sample above benchmark value. Duke Energy
will document this exceedance and our response/actions within our SWPPP per Part D,
Condition D-6. We will also increase our monitoring frequency to monthly (qualitative and
quantitative) and document within our SWPPP the other obligations addressed in Table 3.
If any questions or if further discussions are needed, please do not hesitate to contact Mr. Drew
Petrusic BSEP Environmental Field Support Professional, (910-832-2728 or
drew.petrusicCa_duke-energy.com).
Sincerely,
Jay Ratliff
Plant Manager
Brunswick Steam Electric Plant
cc. Christine Hall, Stormwater Program Supervisor I
Brain Lambe, Environmental Specialist II
Don Safrit, P.E., Carolinas Permitting & Compliance
Eric Caison, DEC BSEP