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TCEQ Toxicology

Toxicology News!!!

New Information Final Development Support Documents (DSDs)Now Available!!

List of Chemicals Under Consideration for ESL Development in 2008 Now Available


Research Projects

Houston Exposure to Air Toxics Study (HEATS)

Air Pollutant Concentrations Near Texas Roadways

What Is Toxicology?

Toxicology is the study of the adverse effects of chemicals on living organisms. A toxicologist is trained to examine the nature of those effects and assess the probability of their occurrence.

Toxicology is used to help the TCEQ make scientifically sound decisions when developing environmental regulations and policy. TCEQ toxicologists help by identifying chemical hazards, evaluating potential exposures, and assessing risks.

What Do TCEQ Toxicologists Do?

TCEQ toxicologists provide toxicological support for a broad range of agency activities. They assist with stakeholder meetings and drafting rules, as well as making technical recommendations regarding agency permitting, monitoring, and enforcement.

For example, TCEQ toxicologists:
  • Conduct the toxicological evaluations of air permit applications;
  • Develop Effects Screening Levels;
  • Evaluate environmental data collected from the air, water, and soil;
  • Contribute toxicological expertise to agency enforcement and emergency-response activities;
  • Coordinate all agency activities that assess risks to human health;
  • Notify private drinking-water well owners of potential groundwater contamination as required by new legislation in Texas Water Code 26.408;
  • Stay abreast of environmental-health issues and initiatives emerging nationally; and
  • Review Baseline Risk Assessments and various other remediation-related documents submitted under the Texas Risk Reduction Program and the Risk Reduction Rules for state and federal Superfund sites.

In all areas of responsibility, the section strives to ensure consistency of reviews across the agency.

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Toxicology Staff and Contact Information

You may e-mail us at tox@tceq.state.tx.us . If you wish to reach a particular staff member, please put “Attn:” and the staffer’s name in the subject line.

Phone Numbers

Toll-Free: 1-877-992-8370
Local: 512/239-1795
Fax: 512/239-1794


Toxicology Section Manager
Michael Honeycutt, Ph.D.
Administrative Assistant
Mary Lively
Toxicologists

Mike Aplin, M.S.

Angela Curry, M.S.

Neeraja Erraguntla, Ph.D.

Shannon Ethridge, M.S.

Roberta Grant, Ph.D.

Joseph Haney, M.S.

Jong-Song Lee, Ph.D.

Vincent Leopold, M.S.

Darrell McCant, B.S.

Valerie Meyers, Ph.D.

Tracie Phillips, Ph.D.

Manuel Reyna, B.S.

Sign Up to Receive Air Pollutant Watch List, ESL List, and Other Toxicology Announcements

To join the Toxicology Announcement List, please e-mail:

join-tox@listserv.tceq.state.tx.us.

Do not put any information in either the subject or message body.

You will automatically receive an acknowledgment by e-mail informing you that your request has been received; however, you must confirm you want to be placed on the list. To make the confirmation, reply to the message.

Once the list administrator has admitted your email address to the list, you will receive a “welcome” document.

RELATED LINKS:

Final Development Support Documents (DSDs)

Toxicological Evaluations of Ambient (Outdoor) Air Monitoring Data

About the Air Pollutant Watch List

About Guidelines for Developing ESLs, ReVs, and URFs

List of Chemicals Under Consideration for ESL Development for 2006

About TCEQ Development Support Documents (DSDs) for Effects Screening Levels
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