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Useful Links for Developing Ecological Risk Assessments

Links to pages on this and other sites that have useful information for developing ecological risk assessments.

TCEQ Documents and Rules

Ecological Guidance




Surface Water




Amphibians and Reptiles


Threatened and Endangered Species

Toxicological Profiles

Petroleum-Contaminated Sites


Defense Site–Related Research/Munitions

Chemical Names and CAS Numbers


General Sites

Publication Sites

About These Links

These online resources are meant to be a service to those persons preparing ecological risk assessments for submittal to the agency. As you use these resources, keep these points in mind:

  • Many of these links exit our Web site. Exit the TCEQ
  • This list is not an endorsement of the information contained on the site.
  • These links are sources of useful information, however, the information may not be directly applicable to the preparation of ERAs for submittal to the TCEQ.
  • Some of these sites contain more generalized information and so might include both ecological- and human health–related information.

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New Information Required use of SW-846 Method 5035

Beginning January 1, 2016, the TCEQ Remediation Division will require the use of United States Environmental Protection Agency (USEPA) SW846 Method 5035A, Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples, as amended, for the collection and preparation of solid samples for volatile organic compound (VOC) analysis using purge-and-trap technology.

The TCEQ Remediation Division guidance on Method 5035 has been updated and is available.