NC0024112_Pretreatment_IUP_Review_20200402

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
April 2, 2020
(sent via email: [e-mail])
Misty Conder, Laboratory Supervisor
City of Thomasville
P.O. Box 368
Thomasville, NC 27361
Subject: Pretreatment Review of Industrial User Pretreatment Permit
City of Thomasville (NPDES Number: NC0024112)
Davidson County
Dear Ms. Conder:
PERCS Unit of the Division of Water Resources has reviewed the Industrial User Pretreatment Permit (IUP)
modification submitted by the City of Thomasville for the following Significant Industrial User (SIU). The
draft IUP was initially received by the Division on March 4, 2020, followed by updated copy of modified
IUP received on March 26, 2020.
IUP # SIU 40 CFR
0029 Custom Drum Services, Inc. N/A
The review, with the observation below, indicates that the IUP is adequate and the minimum
requirements of 15A NCAC 02H .0905 and .0916 and 40 CFR 403.8(f)(1)(iii) are met.
1. Allocation Table: By reviewing the updated Allocation (AT), with the increased limits of some
of the metals in the Custom Drum Services IUP, it appears that the available MAHLs still
positive. However, please note that the POTW needs to use site -specific water quality
standards using dissolved metal criteria and in -stream and effluent hardness in the next
updated Headworks Analysis, which is due October 1, 2020, and some of the metals MAHLs
could be much lower than the current ones.
2. IUP Transmittal: Please note that, State rules have updated effective July 1, 2019. Per 15A
NC 02H .0917(a), each control authority shall transmit to the Division of all significant
industrial user pretreatment permits 30 days prior to the effective date.
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.
D E Q�� 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
mo
m )ry rN c. itiA
o.�ro�em or Ew�����a�:r� �./� 919.707.9000

Thank you for your continued cooperation with the Pretreatment Program. If you have any questions or
comments, please contact Monti Hassan at [phone], or email at [e-mail].
Sincerely,
DocuSigned by:
866374CA4137482...
for S. Daniel Smith, Director
Division of Water Resources
mh/Thomasville. iup.mod.031
cc: Jim Gonsiewski, WSRO (email)
Laserfiche
PERCS copy (e-copy)