NCS000020_Benchmark Exceedance_20240501

Peterson, Kathryn S
From: Eplin, Jerry W
Sent: Wednesday, May 1, 2024 12:58 PM
To: Peterson, Kathryn S
Subject: FW: [External] Duke Energy - McGuire Nuclear Station - NCS000020 Tier I Notification
- Copper &Zinc Benchmark Exceedances
Importance: High
FYI,for your response.
Jerry W. Eplin, PE
Regional Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources
Office: [phone]
Email: merry.eplina-deg.nc.gov
Physical and Mailing Address:
610 E. Center Ave. Suite 301
Mooresville, NC 28115
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Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties
From: Safrit, Don <[e-mail]>
Sent:Wednesday, May 1, 2024 9:06 AM
To: Eplin,Jerry W<[e-mail]>
Cc: Beaver, Gregory Thomas<[e-mail]>
Subject: [External] Duke Energy- McGuire Nuclear Station - NCS000020 Tier I Notification -Copper&Zinc Benchmark
Exceedances
Importance: High
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
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Jerry,
Please accept this email as the two-week notification as required by Part D, Condition D-5,Table 2(ii) regarding the
industrial stormwater system serving the McGuire Nuclear Station.
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On April 9, 2024, quarterly stormwater samples were collected and analyzed in accordance with NCS000020.
Analytical results for ISWO04 (ROS) were received by Duke Energy on April 22, 2024. Upon review of the results, it
was observed that benchmarks for Copper & Zinc were exceeded. The benchmark for Copper is 10 ug/L and the
analytical result was 13 ug/L. The benchmark for Zinc is 126 ug/L and the analytical result was 146 ug/L. We will
document these exceedances and our response/actions within our SWPPP per Part D, Condition D-5. We will also
document within our SWPPP the other obligations addressed in Table 2.
If any questions or if further discussions are needed, please do not hesitate to contact either Greg Beaver, McGuire
Environmental Field Support Professional, (704-642-6845 Cell or [e-mail]) or me via my
contact information below.
Thanks Don
Donald (Don)Safrit, P.E
Lead Environmental Specialist
Duke Energy I Permitting and Compliance, Carolinas
410 S.Wilmington Street I Raleigh, North Carolina 27601
Office: [phone] 1 Cell: [phone]
fDUKE
ENERGY,
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
2

Peterson, Kathryn S
From: Peterson, Kathryn S
Sent: Wednesday, May 1, 2024 3:09 PM
To: [e-mail]; [e-mail]
Cc: Eplin, Jerry W
Subject: McGuire Nuclear Station Copper &Zinc Exceedance
Hi Don,
The Mooresville Regional Office has received your exceedance date and value for ISWO04 at the McGuire
Nuclear Station. Please continue to follow the procedures listed in Table 2:Tier One Response for a
Benchmark Exceedance in Part D, Condition D-5, Table 2(ii) of your individual permit coverage under
NCS000020. Let us know if you need any technical assistance.
Best,
Kathryn
Kathryn Peterson
Assistant Regional Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral and Land Resources
Office: [phone]
Mobile: [phone]
Email: [e-mail]
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
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