About TCEQ Development Support Documents (DSDs) for Effects Screening Levels (ESLs) and Air Monitoring Comparison Values (AMCVs)

The Hexavalent Chromium Oral Reference Dose DSD is now final
The Toxicology Division is requesting toxicity information for n-hexane

• What is a Development Support Document?
• When are Proposed and Final DSDs Published?
• Procedure to Submit Comments
• Contact the TCEQ About DSDs and Fact Sheets
• Sign Up to Receive ESL List, AMCV List, and Other Related Toxicology Announcements

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What is a Development Support Document?

A Development Support Document (DSD) summarizes how chemical-specific toxicity values were derived based on RG-442, Guidelines to Develop Effects Screening Levels, Reference Values, and Unit Risk Factors.

When are Proposed and Final DSDs Published?

A proposed DSD is published at the TCEQ web site for a 60-day public review and comment period. After public comments are received, the TS will address and resolve all relevant issues and make scientifically defensible changes to the DSD and toxicity values, if needed.

The final DSDs with a Response to Comments, if applicable, are then published on the TCEQ website. Registrants on the Toxicology Announcement List will be notified by e-mail when proposed or final DSDs are posted.

Procedure to Submit Comments

Submit comments by e-mail to tox@tceq.texas.gov or by mail (must be received at the TCEQ no later than 12/2/16) to:

Regular mail:

Toxicology Division, MC 168

Texas Commission on Environmental Quality

P.O. Box 13087

Austin, TX 78711-3087

Mail delivery services:

Toxicology Division, MC 168

Texas Commission on Environmental Quality

12100 Park 35 Circle, Bldg. F

Austin, TX 78753

Contact the TCEQ About DSDs and Fact Sheets

Call: 877-992-8370 (toll free) or 512-239-1795

E-mail: tox@tceq.texas.gov

Write: Texas Commission on Environmental Quality

Toxicology Division, MC 168

P.O. Box 13087

Austin, TX 78711-3087

Sign Up to Receive ESL List, AMCV List, and Other Related Toxicology Announcements

For instructions on how to join the Toxicology Announcement List, click here.