NC0021709_Pretreatment_IUP_Modification_Letter_20190430

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Sent via email ([e-mail])
Mr. Tim Church
Water Resources Director
Town of Jefferson
P.O. Box 67
Jefferson, NC 28640
NORTH CAROLINA
Environmental Quality
April 23, 2019
Subject: Pretreatment Review of Industrial User Pretreatment Permit
Program: Town of Jefferson, NPDES Permit No. NCO021709
Ashe County
Dear Mr. Church:
The Pretreatment, Emergency Response and Collection Systems (PERCS) Unit of the Division of Water
Resources has reviewed the Industrial User Pretreatment Permit (IUP) modification submitted by the
Town of Jefferson. The IUP was received by the Division on April 15, 2019.
IUP # I SIU NAME
004 1 American Emergency Vehicles
The review indicates that the IUP is adequate and the minimum requirements of 15A NCAC 2H .0905 and
.0916 and 40 CFR 403.8(f)(1)(iii) are met.
It has come to the PERCS Unit's attention that the receiving stream classification for Jefferson WWTP is
C+, which is subject to a special management strategy to protect downstream waters designated as
Outstanding Resource Waters. During the Headworks Analysis (HWA) review in August 2018, we
overlooked the factor and did not apply % the Water Quality Standards in the Pass -Though loading
calculations. The updated HWA was attached with changes highlighted in orange.
No over allocation resulted from the updates. However, the Maximum Allowable Headworks Loading for
cyanide and several metals decreased, including silver. Please note with American Emergency Vehicles
opening another location and possibly receiving an IUP with limits similar to this one, the silver would be
over allocated. My apologies for the mistake and any inconvenience this might bring to the Town of
Jefferson.
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.
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North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

Thank you for your continued support of the Pretreatment Program. If you have any questions or
comments, please contact me at [phone] [email: [e-mail]] or Deborah Gore, Unit
Supervisor at [phone] [email: [e-mail]].
vz/j effe rso n. i u p.014
EC: PERCS Unit
Paul DiMatteo, WSRO
Central Files (Laserfiche)
Sincerely,
EDocuSigned by:
vivien Zhong, P RCS Unit
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