NC0036269_Pretreatment_IUP_Modification_Letter_20230706

North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1611 Mail Service Center Raleigh, North Carolina 27699-1611
919.707.9000

Via Electronic Mail ([e-mail])

Ms. Beverly Metcalf
Environmental, Health & Safety Compliance Manager
Water & Sewer Authority of Cabarrus County
6400 Breezy Lane
Concord, NC 28025

Subject: Pretreatment Review of Industrial User Pretreatment Permit Modification
Program: Water & Sewer Authority of Cabarrus County (WSACC)
Wastewater Treatment Plant: Rocky River Regional WWTP
NPDES #: NC0036269, Cabarrus County

Dear Ms. Metcalf:

The Municipal Unit of the Division of Water Resources has reviewed the Industrial User Pretreatment Permit
(IUP) modification submitted by the WSACC for the following Significant Industrial User (SIU). The submission
was received by the Division on May 11th, 2023.

IUP # SIU NAME
1031 CHARLOTTE WATER

The review indicates that the IUP is adequate and meets the minimum requirements of 15A NCAC 2H .0916 and
40 CFR 403.8(f)(1)(iii). The allocation table, maintained in the Division’s database, has been updated accordingly.

Within 180 days of the effective date of any reissued or modified NPDES permit 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 (SIUs). Pursuant to 15A NCAC 2H .0907(b) either the Division or the permittee may
initiate pretreatment program revisions.

Federal and State pretreatment regulations require the local delegated pretreatment program to effectively control
and document the discharge of wastewater from Significant/Categorical Industrial Users to the POTW. It is the
POTW’s responsibility to ensure that these objectives are consistently met.

If you have any questions or comments, please contact Octavio Henriquez at [phone] [email:
[e-mail]] or Keyes McGee at [phone] [email: [e-mail]]. Thank
you for your continued support of the Pretreatment Program.

oih/cab_rocky_charlotte_iup_mod_128
Ec: Municipal Unit File
Wes Bell, MRO
Central Files (Laserfiche)
Sincerely,

for Richard E. Rogers, Jr., Director
Division of Water Resources
DocuSign Envelope ID: 19D61679-0A87-481A-80AB-3066974CFB0C
7/6/2023