NCS000571_Cliffside Steam Station Tier I Notification_20230602

Chandler, Jeffrey A
From: Eplin, Jerry W
Sent: Friday, June 2, 2023 9:53 AM
To: Chandler, Jeffrey A
Subject: FW: [External] Cliffside Steam Station NCS000571 Tier One notification
Please upload to Laserfiche.
From: Eplin, Jerry W
Sent: Friday, June 2, 2023 9:52 AM
To: Hodges, Steve D <[e-mail]>
Cc: Tollie, Lori White <[e-mail]>; Conner, Steven B <[e-mail]>; Khan,
Zahid <[e-mail]>
Subject: RE: [External] Cliffside Steam Station NCS000571 Tier One notification
Mr. Hodges:
NC DEQ has received your Tier I and Tier II notifications. Please let us know if we may provide assistance.
Regards,
Jerry W. Eplin,
Assistant Regional Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources
DEQ is upading its email addresses to @deq.nc.gov in phases from May 1st to June 9t", 2023.
Employee email addresses may look different, but email performance will not be impacted.
Office: [phone] x2147
Email: ierrv.eolin(d)dea.nc.aov
Physical and Mailing Address:
610 E. Center Ave. Suite 301
Mooresville, NC 28115
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

From: Hodges, Steve D <[e-mail]>
Sent: Wednesday, May 31, 2023 1:41 PM
To: Khan, Zahid <[e-mail]>; Eplin, Jerry W <[e-mail]>
Cc: Tollie, Lori White <[e-mail]>; Conner, Steven B <[e-mail]>
Subject: [External] Cliffside Steam Station NCS000571 Tier One notification
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As directed by Part D., Section D-5 of the stormwater permit (NCS000571), a notification is required to the Mooresville
Regional Office of the sample result that entered into Tier One status. Stormwater sample results were received on
5/18/2023 for the stormwater sampling event on 4/26/2023 and 4/27/2023. Tier One status was triggered for Copper
at SW011 during this storm event.
Tier Two status was triggered for Total Suspended Solids and Mercury at Outfall SW011. The attached letter was mailed
to the Mooresville Regional Office as directed by Part D-6 of the stormwater permit on 5/31/2023.
A site investigation has been completed. Total Suspended Solids at stormwater outfalls SWO11 and SWO16-42 are
associated with the hauling of ash from the ash basin to the onsite landfill. Additional BMP have been installed and
steps to minimize wheel track out have been implemented. The site is evaluating adding a flocculant to the
sediment basins and sediment traps along side the haul road. It is assumed that the high Total Suspended Solids
caused the copper and mercury to be over the bench marks at these outfalls.
Qualitative and Quantitative monitoring will be conducted monthly at Outfall SW001, SW011 and SWO16-42 until three
consecutive samples results are below the benchmark values.
If you have any questions you can contact me at 828 657-2339.
Steve Hodges
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