NC0055786_IWS approval_20201202

DocuSign Envelope ID: CAB 10 D20-7 FO B-483C-A464- E26 D D E492427
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
12/2/2020
Via Electronic Mail (eminerali(alexingtonnc.gov)
Ms. Eglantina Minerali
Pretreatment Program Coordinator
City of Lexington
500 Glendale Road
Lexington, NC 27292
Subject: Pretreatment Review of Industrial Waste Survey (IWS)
Program: City of Lexington
WWTP: City of Lexington WWTP - NPDES Number NCO055786
Davidson County
Dear Ms. Minerali:
The Municipal Unit of the Division of Water Resources has reviewed the Industrial Waste Survey (IWS) for the
City of Lexington and the area of Welcome. The IWS was received by the Division on August 28, 2020. Additional
information was requested by the Division and the revised IWS was submitted on November 18, 2020.
Proper completion of an IWS is required by your NPDES permit. The review indicates that the IWS is adequate
and meets the minimum requirements of 40 CFR 403.8 (f) (2).
The City's IWS included 144 commercial establishments/industries that contribute approximately 285,313 gpd
(0.285 MGD), 4.4 % of the City's WWTP permitted flow, 6.5 MGD. The City has 5 Significant Industrial Users
(SIUs) and 4 industries with a local permit.
Please remember it is the responsibility of the POTW to continue efforts to ensure that any SIUs, as defined by
NCAC 15A 211 .0903(b)(30) (A) through (D), are identified and subsequently added to the City's pretreatment
program. This includes evaluation of new industrial users (IUs) before they commence discharge and evaluation
of existing IUs determined to be not SIUs that make changes to their process.
Next IWS Due Date: Your next updated IWS is due on November 23, 2025 unless conditions at the POTW change
significantly and thus warrant an earlier submittal.
Regardless of this approval action today, within 180 days of the effective date of any reissued NPDES permit (or
any subsequent NPDES permit modification) the Permittee would be required to submit to the Division a written
technical evaluation of the need to revise local limits (i.e., an updated IWS, or documentation of why one is not
needed). This action may include revising, updating or adding to the list of Significant Industrial Users (SIU's).
Pursuant to 15A NCAC 02H .0907(b) either the Division or the permittee may initiate pretreatment program
revisions. Any additional conditions or requirements provided to the permittee related to pretreatment or
pretreatment program updates must be complied with separately from this approval action.
If you have any questions or comments, please contact Diana Yitbarek at [phone] [email:
diana.yitbarek(a�ncdenr.gov] .
D EQ �� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA
oePenmamofEntIm—e�iQuality /`� 919.707.9000

DocuSign Envelope ID: CAB 10 D20-7 FO B-483C-A464- E26 D D E492427
Thank you for your continued cooperation with the Pretreatment Program.
Sincerely,
ADocuSigned byy:n Al A �'n.'' A
YVuC rVWVN� r✓l.�h
C464531431644FE...
for S. Daniel Smith, Director
Division of Water Resources
Attachments: Revised IWS
Correspondence
File name: dy/lexington.iws.2020
Copied to: Municipal Unit File
Alexander Lowe, WSRO
Central Files (Laserfische)