NC0026051_Pretreatment_IUP_Modification_Letter_20240506

DocuSign Envelope ID: 23508733-89C3-45A4-BA37-A27DF44196F2
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARI) E. ROGERS, JR.
Director
Via Electronic Mail (aimoorc&dconc. og_v)
Amy Moore
Laboratory & Compliance Manager
Durham County
5926 NC Hwy 55 East
Durham, NC 27713
NORTH CAROLINA
Environmental Quality
5/6/2024
Subject: Pretreatment Review of Industrial User Pretreatment Permit Modification
Program: Durham County
Wastewater Treatment Plant: Triangle Creek WWTP
NPDES #: NC0026051, Durham County
Dear Amy Moore:
The Municipal Unit of the Division of Water Resources has reviewed the Industrial User Pretreatment Permit (IUP)
modification submitted by Durham County for the following Significant Industrial User (SIU). The original
submission was received by the Division on 02/06/2024, with an additional modification submitted and received
on 05/01/2024.
SIU # SIU NAME
DC-080 Biogen 11
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)(111). 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.
Thank you for your continued cooperation with the Pretreatment Program. If you have any questions or comments,
please contact Natalie Gorensek [email: natalie.gorensekkdeq.nc.govl at [phone] or Octavio Henriquez at
[phone] [email: octavio.henriquezkdeq.nc.gov].
nhg/durco_triangle _biogen_iup_mod_ 141
Ec: Municipal Unit File
Cheng Zhang, RRO
Central Files (Laserfiche)
Sincerely,
DocuSigned by:
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Michael J. Montebello, NPDES Branch Chief
Division of Water Resources
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
NORTH CAROL Na 919.707.9000