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Wastewater System Design Requirements

Note: Do not send blueprints or full specification booklets with the Chapter 317, Summary Transmittal Letter. The Texas Commission on Environmental Quality (TCEQ) will request these items by mail or fax if it is determined that a full review is required. This does not apply to wastewater projects located over the Edwards Aquifer. Full plans and specifications must be submitted to the appropriate regional office (Austin or San Antonio).

Background

Sewerage systems (domestic wastewater treatment systems) or material alterations to sewerage systems are required to be developed in accordance with state design criteria. The design criteria set minimum standards necessary for domestic wastewater treatment systems to function properly and meet requirements for effluent quality. The criteria also contain certain safety standards.

Submittal And Review Requirements

Up until January of 1996, plans and specifications (plans and specs) for all sewerage systems or material alterations to sewerage systems were required to be technically reviewed and approved by the state to ensure that they complied with design criteria. In January 1996, the TCEQ rules were modified to give TCEQ the discretion to select plans and specs on a case-by-case basis for technical review, rather than reviewing all of them. In addition, municipalities and other state agencies were given the option to review and approve projects in lieu of TCEQ.

In March 1997, the TCEQ rules were further modified by limiting the requirement for submittal of plans and specs for every project where TCEQ is the review authority and instead require submittal of a summary transmittal letter for each project. The summary letter must contain a written findings statement from a registered professional engineer that the plans and specs for the project are in substantial compliance with design criteria and that any deviation from the standards is based on best professional judgment. If TCEQ chooses to conduct a technical review of the plans and specs for the project, TCEQ must notify the design engineer within 10 days of receipt of the summary, and the plans and specs for the project must then be submitted to TCEQ for technical review and approval. Construction may not be initiated on projects which are designated for technical review until TCEQ has issued written approval for the plans and specs.

Design Criteria

Texas Cities with Design Approval Authority

The TCEQ is currently updating this list and therefore, what follows is a partial list only.
  • City of Austin
  • City of Carrollton
  • City of Dallas
  • City of Faith
  • City of Fort Worth
  • City of Houston
  • City of Kerrville
  • City of Plano
  • City of San Antonio
  • City of Wichita Falls

Design Forms and Instructions

All application forms listed below are Word Perfect and Adobe Acrobat PDF documents. (Help with downloading files.)

The forms may be used as refresher/training aids or to prepare for a TCEQ full technical review/Edwards Aquifer project.

Edwards Aquifer Projects

  • TCEQ-00582: Sewage Collection Systems Application for Regulated Activities on the Edwards Aquifer Recharge Zone (MS Word, Word Perfect, PDF)

  • TCEQ-00624: Lift Station/Force Main System Application for Regulated activities on the Edwards Aquifer Recharge Zone (MS Word, Word Perfect, PDF)


RELATED LINKS:

Wastewater System Design Criteria Stakeholder Group
Texas Homeland Security
TRAIL: Texas Records and Information Locator
TexasOnline