NC0026051_Pretreatment_IUP_Renewal_Letter_20240828 (2)

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])

Amy Moore
Laboratory & Compliance Manager
Durham County
5926 NC Hwy 55 East
Durham, NC 27713

Subject: Pretreatment Review of Industrial User Pretreatment Permit Renewal
Program: Durham County
Wastewater Treatment Plant: Triangle 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)
renewal submitted by Durham County for the following Significant Industrial User (SIU). The submission was
received by the Division on 07/30/2024.
SIU # SIU NAME
DC-040 Wolfspeed, Inc. RTP
DC-076 Wolfspeed, Inc. Durham
The review indicates that the IUPs are adequate and meet 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.
Thank you for your continued cooperation with the Pretreatment Program. If you have any questions or comments,
please contact Natalie Gorensek [email: [e-mail]] at [phone] or Octavio Henriquez at
[phone] [email: [e-mail]].

nhg/durco_triangle_wolfspeed_iup_ren_142
Ec: Municipal Unit File
Cheng Zhang, RRO
Central Files (Laserfiche)
Sincerely,

Michael J. Montebello, NPDES Branch Chief
Division of Water Resources

Docusign Envelope ID: F5EA5054-709C-4E6B-BA56-65464FE81358
8/28/2024