NC0037834_Pretreatment_Compliance_Inspection_Letter_20240920

Docusign Envelope ID:2E9BBB93-34B8-4F1E-8687-lC99D9B47732 _...... r
" STATE,
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ROY COOPER -
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Governor
MARY PENNY KELLEY
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
9/20/2024
Via Electronic Mail([e-mail])
Joel Freeman
Industrial Waste Control Supervisor
City of Winston-Salem
2799 Griffith Road
Winston-Salem,NC 27103
Subject: Pretreatment Compliance Inspection
Program: City of Winston-Salem
Wastewater Treatment Plant: Archie Elledge WWTP and Muddy Creek WWTP
NPDES#: NCO037834 and NC0050342,Forsyth County
Dear Mr. Freeman:
On July 26t1i,2024 a Pretreatment Compliance Inspection(PCI)was performed by Octavio Henriquez of the
Central Office. Joel Freeman of the City of Winston-Salem was present for the PCI. The purpose of this PCI was
to determine the effectiveness of the City's pretreatment program,which includes the review of files, including
industrial monitoring data,POTW plant performance,industry monitoring data,adherence to the enforcement
response plan(ERP), an industry inspection,and other pretreatment elements as outlined by 15A NCAC
02H .0900.
Background
The city has twenty-seven(27) Significant Industrial Users(SIUs),ten(10) of which are categorical under federal
regulations. The City of Winston-Salem's Publicly Owned Treatment Works(POTW) operates two Wastewater
Treatment Plants(WWTP).Archie Elledge WWTP (NC0037834)is permitted for 30 MGD and Muddy Creek
WWTP(NC0050342) is permitted for 21 MGD.
POTW Interview
There are no known POTW issues related to pretreatment at the time of this PCI.
Pretreatment Program Elements Review
The Headworks Analysis(HWA)renewals were submitted for both WWTPs on September 9th, 2022. The HWA
renewals are currently awaiting review by the Division.
The Industrial Waste Survey(IWS)was approved on August 1 lth,2022.
North Carolina Department of Environmental Quality I Division of Water Resources
_ 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
NORTH CARDLINA
o�..mm i m 919.707.9000

Docusign Envelope ID:2E9BBB93-34B8-4F1E-8687-lC99D9B47732
The Sewer Use Ordinance(SUO)was approved on February 9th,2012.
The Enforcement Response Plan(ERP)was approved on February 5th, 2020.
The Long Term Monitoring Plan(LTMP)was approved on March 51h,2019.
LTMP File Review Findings
The Division reviewed the LTMP from 2018 and found the PQLs to be out of date.A new PQL list was released
in 2022. We request that the City of Winston-Salem revise the LTMP with the updated PQLs. The City of
Winston-Salem also indicated that fluoride will be added to the list of Pollutants of Concern
The Long Term Monitoring Plan(LTMP)is being conducted at the proper locations and frequencies.
Industrial User Permit(IUP)File Review
One(1)of the twenty-seven(27) SLUs was in significant noncompliance(SNC) in the last 2 semi-annual periods.
Stratford Metal Finishing(IUP# 1152)was in SNC for limits violations.
A review of the file for Liquid Environmental Solutions(IUP#2020)revealed that the monitoring data was well-
organized and in compliance with pretreatment rules.
A review of the file for Adele Knits,Inc. (IUP#2019)revealed that the monitoring data was well-organized and
in compliance with pretreatment rules.
A review of the file for Grass America Inc. (IUP#2103)revealed that the monitoring data was well-organized and
in compliance with pretreatment rules.
The slug control plan for Environmental Solutions (IUP#2020)was in good order.
The slug control plan for Adele Knits,Inc. (IUP#2019)was in good order.
The slug control plan for Grass America Inc. (IUP#2103)was in good order.
Industry Inspection
No industry inspection was conducted during this PCI.
Action Items
No action items are required.
E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
_ 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
NORTH CAROLINA
DWro^a^u1�_m a�• /� 919.707.9000

Docusign Envelope ID:2E9BBB93-34B8-4F1E-8687-lC99D9B47732
Final Comments
The City of Winston-Salem's Pretreatment Program is in excellent shape. The industry files and sampling records
are well organized, and Joel Freeman fosters good relationships with the industries in the pretreatment program.
Please review the attached inspection sheet.
Thank you for your continued cooperation with the Pretreatment Program. If you have any questions or comments,
please contact Octavio Henriquez at(919) 707-3662 [email: octavio.henriquez(cr�,deq.nc.gov].
Sincerely,
oih/winston-salem_pci_2024 Signed by:
Ec: Municipal Unit File I
A�'t�n. �Vti,S�bVG
Jenny Graznak,WSRO E5B6D66F2457475...
Central Files (Laserfiche) Karen Preston,Municipal Unit Supervisor
Division of Water Resources
DE Q�� North Carolina Department of Environmental Quality I Division of Water Resources
_ 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
NORTH CAROLINA
D^ d..d m�—�OW r 919.707.9000