NC0026051_Pretreatment_IUP_Modification_Letter_20240711

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])

Ms. Amy Moore
Laboratory and Compliance Manager
Durham County
5926 NC Hwy 55 East
Durham, NC 27713

Subject: Pretreatment Review of Industrial User Pretreatment Permit Modification
Program: Durham County
Wastewater Treatment Plant: Triangle Creek WWTP
NPDES #: NC0026051, Durham County

Dear Ms. 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 Division
received the submission on June 21st, 2024.

IUP # SIU NAME
DC-106 TriPharm Services, Inc. dba Alcami Corporation

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)(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 Significant
Industrial Users (SIUs) list. 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 wastewater discharge from Significant/Categorical Industrial Users to the POTW. It is the POTW’s
responsibility to ensure that these objectives are consistently met.

If you have any questions or comments, please contact Octavio Henriquez at [phone] [email:
[e-mail]]. Thank you for your continued support of the Pretreatment Program.

oih/durco_triangle_tripharm_iup_mod_144
Ec: Municipal Unit File
Cheng Zhang, RRO
Central Files (Laserfiche)
Sincerely,

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

Docusign Envelope ID: 22000401-678B-4323-BFBF-44314A776743
7/11/2024