NC0031836_NOV-2021-LV-0445 Response_20210628

From: Andy Smith
To: Basinger, Corey
Cc: Bell. Wes
Subject: [External] FW: City of Statesville WTP 06/25/2021 15:50
Date: Friday, June 25, 2021 3:42:51 PM
Attachments: D00062521-06252021155033.pdf
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as
an attachment to Report Spam.<mailto:report.spam@n nc.gov>
Mr. Basinger, attached is the response for the Fourth Creek WWTP NOV for Ammonia Nitrogen.
Original Message
From: City of Statesville WTP <[e-mail]>
Sent: Friday, June 25, 2021 3:51 PM
To: Andy Smith <[e-mail]>
Subject: City of Statesville WTP 06/25/2021 15:50
[NOTICE: This message originated outside of the City of Statesville mail system -- DO NOT CLICK on links or
open attachments unless you are sure the content is safe.]
Scanned from MFP11864953
Andy
Scan To_File
Date:06/25/2021 15:50
Pages:1
Resolution:200x200 DPI
Please DO NOT REPLY to this email. This is a send only device
Pursuant to NCGS Chapter 132, Public Records, this electronic mail message and any attachments hereto, as well as
any electronic mail messages that may be sent in response to it may be considered public record and as such are
subject to request and review by anyone at any time. If you are not the intended recipient of this message, please
delete this message and inform the sender.

CITY of
��!
NORTH CAROLINA
June 25, 2021
NCDEQ
Corey Basinger, Regional Supervisor
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: Response to Notice of Violation
Tracking Number: NOV-2021-LV-0445
Permit No. NC0031836
Fourth Creek WWTP
Dear Mr. Basinger,
The Fourth Creek WWTP has an open storage pad that we use to store dewatered sludge on for both the
Third Creek and the Fourth Creek WWTP's. There are several storm drains on this pad that direct the
rainwater back to the head of the WWTP. The months of February and March produced some rain
events that saturated the dewatered sludge on the storage pad. The rain events also caused the Influent
flow to increase considerably. With the increased flow due to the rain and the runoff from the sludge
storage pad coming back to the head of the WWTP is the cause for exceeding the weekly average and
the monthly average for the Ammonia Nitrogen concentration
The City of Statesville is looking into several options to prevent these issues from occurring in the future.
• Option A- Assess a cost estimate to build an equalization basin to help manage the hydraulic
profile of the influent stemming from I & I.
• Option B — Install a cover over the open storage pad to keep the dewatered sludge from
absorbing any rainwater and conveying it back to the headworks of the WWTP to be treated
again.
The City of Statesville has completed a study with McGill Engineers for a future plant upgrade that
specifically addresses biological nutrient removal as well as the increased flow.
The City is committed to effective operation to maximize nutrient reduction of the Fourth Creek WWTP.
Water Resources Operations Manager
PO Box 1111 • Statesville, NC 28687 • ci.statesville.nc.us