November 28, 2016

In accordance with 40 CFR 403.18, the Fairfield-Suisun Sewer District (District) submitted a request to the California Regional Water Quality Control Board (RWQCB) on October 15, 2015 for modification of its local limits.  Because this change relaxes local limits, it is considered a substantial modification of the District’s Pretreatment Program.

The following local limit changes are proposed to improve program administration while continuing to protect the District’s publically-owned treatment wastewater facilities:

  • Removal of limits for total identifiable chlorinated hydrocarbons (TICH) and phenolic compounds: These limits were developed based on past definitions, making compliance determination difficult using current methods.  The District’s 2015 Local Limits Evaluation examines all detected organics and does not find any requiring local limits.
  • Removal of the existing total petroleum hydrocarbon (TPH) limit: There is no EPA-approved analytical method for TPH in wastewater, and the District proposes a more stringent benzene, toluene, ethylbenzene, and xylene (BTEX) limit for worker health and safety.
  • Adoption of a single numeric limit for Oil & Grease.

In accordance with 40 CFR 403.11(b)(1) and 40 CFR 403.18(c)(3) this modification may be approved without a public notice of decision at the end of the public review period and review by the RWQCB if:

  • No comments are received by December 31, 2016;
  • No substantive comments are received; and

There are no changes to the proposed modifications as a result of this public notice.

Anyone may submit written comments or provide comments or request a public hearing on this proposal within 30 days of this notice.  If no comments on this notice are received, the proposed modification will be approved as set forth within and without changes and without further public notice.

The public comment period begins on: November 30, 2016

The public comment period ends on:  December 31, 2016

The proposed Wastewater Discharge Ordinance and Local Limit review documents can be viewed online at  A hard copy is available for viewing by the general public at:

Fairfield-Suisun Sewer District
1010 Chadbourne Road
Fairfield, CA 94534

The proposed pretreatment program modification will be considered for adoption by the District Board of Directors at its January 23, 2017 meeting.  Comments regarding to the proposed modifications should submitted in writing via mail or email to:

Meg Herston, Environmental Compliance Engineer
Fairfield-Suisun Sewer District
1010 Chadbourne Road
Fairfield, CA 94534-9700
Fax: (707) 429-1280