NC0021709_Pretreatment_HWA_Letter_20180807

Water Resources
Environmental Quality
August 7, 2018
Sent via email ([e-mail])
Mr. Tim Church
Water Resources Director
Town of Jefferson
P.O. Box 67
Jefferson, NC 28640
Subject: Pretreatment Review of Headworks Analysis (HWA)
Town of Jefferson, NPDES Permit No. NC0021709
Ashe County
Dear Mr. Church:
ROY COOPER
Gove, nor
MICHAEL S REGAN
Secret(' y
LINDA CULPEPPER
Interim Di, ector
The Pretreatment, Emergency Response, and Collection Systems (PERCS) Unit of the Division of
Water Resources has reviewed the Headworks Analysis (HWA) for the Town of Jefferson. The
HWA was submitted to reflect the new NPDES limits changes and to apply the dissolved metal
stream standards. The HWA was received by the Division on August 3, 2018.
The Division concurs with the HWA calculations for all pollutants of concern, with the
observations discussed below. These approved Maximum Allowable Headworks Loadings
(MAHLs), Maximum Allowable Industrial Loadings (MAILs), and the basis for these values are
found on the last page of the HWA spreadsheet. The results of the HWA are also listed in the
bottom section of the Allocation Table.
1. Cyanide and Silver Over Allocation: Cyanide and Silver are over allocated based on NPDES
loadings and stream standards Per the discussion between Michael Whittenburg from McGill
Associates, the town consultant and Vivien Zhong from PERCS Unit, the town would work
with the SIU to revise the IUP limits to resolve the over allocation. The PERCS Unit would be
notified when it is completed.
2. HWA Due Date: The HWA approved today is primarily based on DMR/STMP data for the
period of January through December 2016. Unless conditions at the POTW change
significantly and thus warrant an earlier submittal (see Comprehensive Guide, Section 8), the
POTW must submit an updated HWA on or before April 1, 2022.
Nothing Compares°"--,_.w_
State of North Carolina I Environmental Quality
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-707-9000

If you have any questions or comments, please contact me at [phone] (Please note the
new phone numbers') [email: Vivien.Zhong@ncdenr goy] or Deborah Gore, Unit Supervisor at
[phone] [email [e-mail]]. Thank you for your continued cooperation
with the Pretreatment Program.
Sincerely,
Vivien Zhong, PERCS Unit
vz/J effe rson. H WA.2018
EC: Michael Whittenburg, McGill Associates
PERCS Unit
Jim Gonsiewski, WSRO
CC: Central Files