NC0044423_NOI2021LV0623_Response_20210831

From: Daniel Gryder <[e-mail]>
Sent: Tuesday, August 31, 2021 8:58 AM
To: Lowery, Patricia
Subject: [External] ASU NOV-2021-LV-0623 Response
Attachments: NOV-2021-LV-0623 May 26.pdf
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Ms. Lowery,
Thank you for responding to my voicemail yesterday regarding the attached NOV for Permit Number:
NC0044423.
The attached permit violation is for high turbidity in the plants effluent wastewater on 5/26/21.
Since the high turbidity reading in May, ASU has taken the following steps to remediate the problem:
1. The week of June 28th 2021 ASU performed a plant shutdown in order to vacuum excavate the sludge
basin. Approximately 9000 gallons of sludge and water was removed from the bottom of the sludge
basin. The basin was then thoroughly pressure washed and and again pumped out. This was the first
time the basin had been cleaned in at least 4 years. ASU has implemented a basin cleaning ticket into
our work order system so that the basin will be cleaned yearly in the future. ASU believes that the
removal of the basin sludge will serve to reduce turbidity in the wastewater.
2. ASU has also implemented a new discharge schedule to avoid running the plant during a waste water
discharge. When the backwash from the plant runs into the basin, the basin water gets stirred up. ASU
is now performing discharges when the plant is not running, giving the basin water approximately 20
hours to settle before the discharge is performed.
We at the ASU Water Plant are highly committed to protecting the water quality of our basin, and will
continue to strive for excellence in all aspects of water treatment.
Please let me know if there is any other information I can provide for you.
Thanks,
Daniel Gryder
file:///edc-nasvm01.eads.ncads.net/...uSign/Tricia/CPA%20Awaiting%20Response/NC0044423 NOI2021LV0623 Response_20210831.txt[8/31/2021 10:36:28 AM]