NC0043176_Correspondence_20200708

north carolina Mayor
William P. Elmore Jr.
LWDUNN MayorMembers
ro Tern
Chuck Tumage
Councill Members
city of d u n n April LeGaulden
POST OFFICE BOX 1065 • DUNN, NORTH CAROLINA 28335 Frank McLean
Billy Tart
[phone] • FAX [phone] Dr. David L. Bmdham
www.dunn-nc.org City Manager
Steven Neuschafer
July 8, 2020
Re: City of Dunn, NC
Black River WWTP
NPDES Permit No. NCO043176
Aeration System Replacement
DWI Project E-SRP-W-17-0106
DMP 170207 (AL)
Mr. Trent Allen
NCDEQ Fayetteville Regional Office
225 Green Street
Suite 714
Fayetteville, NC 28301
Dear Trent:
The City of Dunn is implementing the much needed Aeration System Replacement
Project. The contractor has reached the point where we must remove aeration basins
from operation so that they can clean, demo existing equipment, and install new
aeration components.
This will reduce the available basin capacity by 50%, and will also reduce the capacity
to pass wet weather flows downstream to the final clarifiers. We plan to use the
equalization basin to manage flows during rain events and maximize the level of
treatment to the extent possible.
The following is an outline of the contractor's proposed schedule:

Target Activi
Date
July 141h Dewater Basins 3 & 4, begin cleanout
July 301h Begin installation of new diffusers
Sept 1511, Test system, return Basins 3 & 4 to service
Sept 22nd Dewater Basins 1 & 2, begin cleanout
Oct 151h Begin installation of new diffusers
Nov 121h Test system and return Basins 1 & 2 to service
We will update the Regional Office as these tasks progress forward. The key to meeting
this schedule is the delivery of electrical components and air piping which have been
delayed by COVID49 issues at the manufacturing facilities.
If you have any questions, or need additional information, please let us know.
Sincerely,
Heather Adams
Public Utilities Director
DUNN
II -America Ciq
1989 * 2013
communi masters