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

A Development Support Document summarizes how chemical-specific toxicity values were derived based on published guidelines (RG-442).

NEW The 4,4-Methylene Diphenyl Diisocyanate and 1,6-Hexamethylene Diisocyanate DSD has been finalized

Contact the TCEQ About DSDs and Fact Sheets

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


Write: Texas Commission on Environmental Quality Toxicology, Risk Assessment, and Research 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.