NC0038377_Notification of 85% Rule exceedence_20200908

1
Thomas, Zachary T
From:Manuel, Vanessa
Sent:Tuesday, September 8, 2020 12:47 PM
To:Thomas, Zachary T; Rice, Eric; Vinson, Scott
Cc:Zimmerman, Jay
Subject:FW: [External] Mayo Steam Station exceedance of 85% allowable level for Arsenic
Attachments:Signed 85 percent permit condition interpretation 11142018.pdf; Mayo NPDES permit
NC0038377.pdf
Follow Up Flag:Follow up
Flag Status:Flagged
Zach/Eric –

FYI. Please ensure a copy of Lori’s email is placed into Mayo’s NPDES permit file (NC0038377). Zach, I’m not sure if a
violation will populate BIMS for the August 2020 reporting period. You’ll need to verify & compare the analytical result
to the hardcopy permit to determine any compliance issues.

Thanks,

Vanessa E. Manuel
Assistant Regional Supervisor
Division of Water Resources – Raleigh Regional Office
Department of Environmental Quality

919 791-4232 Office
[e-mail]

Physical: 3800 Barrett Drive, Raleigh, NC 27609
Mailing: 1628 Mail Service Center, Raleigh, NC 27699-1628

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

From: Tollie, Lori White [mailto:[e-mail]]
Sent: Tuesday, September 8, 2020 12:24 PM
To: Chernikov, Sergei <[e-mail]>; Manuel, Vanessa <[e-mail]>; Wilson,
Leanne <[e-mail]>
Subject: [External] Mayo Steam Station exceedance of 85% allowable level for Arsenic

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]

Sergei and Vanessa,
2

I left both of you a voicemail concerning the recent data Mayo received with an arsenic value of 9.1 ug/L at outfall 002
from a sample taken on August 26. This value is in excess of the 85% of the allowable level for Arsenic based on the
water quality standard of 10 ug/L. The Mayo ash basin had a large slough event happen on August 31 and all decanting
activity has stopped as we continue to access the ash basin. Please let me know if you have any questions or if you need
further information. Thank you.

Lori W. Tollie
Duke Energy
Permitting & Compliance
2500 Fairfax Road
Greensboro, NC 27407
Cell: [phone]
Office: [phone]