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Request for a Modification of a Previously Approved Plan

Forms to complete for a request to modify an approved Edwards Aquifer protection plan.

Under what circumstances would I need to submit a modification request?

A request for a modification to a previously approved plan, or modification plan, is required for any modification to a previously approved Edwards Aquifer protection plan.

You should submit a modification plan:

  • to deviate from your approved plans in the physical design of a pond, dam, berm, sewage treatment plant, flow diverter, or any other structure designed to reduce water pollution;
  • to change the way you intend to operate any of these structures;
  • to change the type of regulated activity from what was originally approved;
  • to make a change that would significantly affect the ability of the plan to prevent pollution of the Edwards Aquifer;
  • to develop land that was to be left undeveloped under your original water pollution abatement plan; and
  • to make a physical modification to an approved organized sewage collection system, UST facility, or AST facility.

When should a modification request be submitted to the TCEQ?

A modification request must go through the application submission and review process and be approved prior to the commencement of the modification.

How much is the fee?

The fee is based on the acreage of the entire area included within the legal boundaries of the property described in the application and the type of development (one single-family dwelling; multiple single-family residential or parks; and non-residential). The minimum fee is $650; the maximum fee, $10,000. For additional information on fees, view the Application Fee Form TCEQ-0574 (PDF, Word), which includes a complete fee schedule.

Are there any tips for completing this request?

Do not leave any questions unanswered. If a question does not apply to your site, enter “N/A” in the blank and briefly explain why the question does not apply.

How do I know what forms to complete?

The forms listed below are required regardless of which area you are requesting an exception for.

Application Cover Page

Form TCEQ-20705 (PDF, Word)

Agent Authorization, (if application submitted by agent)

Form TCEQ-0599 (PDF, Word)

Application Fee (Check payable to the “Texas Commission on Environmental Quality”)

Form TCEQ-0574 ( PDF, Word)

Core Data Form

Form TCEQ-10400 (Word)
TCEQ-10400 Standards (PDF)
TCEQ-10400 Instructions (PDF)

In addition to the forms listed above, use the applicable forms below to complete your modification request. These forms are grouped by Recharge and Transition Zones or Contributing Zone.

Forms - Recharge and Transition Zone

The following forms are required when requesting an exception in the Recharge or Transition Zones of the Edwards Aquifer.

General Information

Form TCEQ-0587 (PDF, Word)

Geologic Assessment

Form TCEQ-0585 (PDF, Word)
Instructions to Geologists (PDF, Word)
Geologic Assessment Table (PDF, Excel)

Modification of a Previously Approved Plan

Form TCEQ-0590 (PDF, Word)
Application Checklist (PDF, Word)

Water Pollution Abatement Plan Application (if applicable)

Form TCEQ-0584 (PDF, Word)

Temporary Stormwater Section

Form TCEQ-0602 (PDF, Word)

Permanent Stormwater Section

Form TCEQ-0600 (PDF, Word)

Underground Storage Tank Facility Plan Application (if applicable)

Form TCEQ-0583 (PDF, Word)

Aboveground Storage Tank Facility Plan Application (if applicable)

Form TCEQ-0575 (PDF, Word)

Organized Sewage Collection System Plan Application (if applicable)

Form TCEQ-0582 (PDF, Word)

Lift Station/Force Main System Application (if applicable)

Form TCEQ-0624 (PDF, Word)

Forms - Contributing Zone

The following forms are required when requesting an exception in the Contributing Zone of the Edwards Aquifer.

Modification of a Previously Approved Contributing Zone Plan

Form TCEQ-10259 (PDF, Word)
Application Checklist (PDF, Word)

Contributing Zone Plan Application

Form TCEQ-10257 (PDF, Word)

Temporary Stormwater Section (if applicable)

Form TCEQ-0602 (PDF, Word)

Stormwater Pollution Prevention Plan (if applicable)

Notice of Intent (NOI) for Stormwater Discharges Associated with Construction Activity under TPDES General Permit (TXR30000) (if applicable)

Form TCEQ-20022 (Word)

Who can I contact if I need help?

If you are located in Williamson, Travis, or Hays County, call the TCEQ’s Austin Regional Office at 512-339-2929. For help in Comal, Bexar, Medina, Uvalde, or Kinney County, call TCEQ’s San Antonio Regional Office at 210-490-3096.