TCEQ has finalised its DSD on isoprene, used in the manufacture of synthetic rubber, and also formed by oil fires, tobacco smoke and car exhausts. The Commission has also released a new proposed DSD, on diethanolamine and triethanolamine, and is seeking public comments. The DSDs are used by TCEQ to inform the derivation of inhalation Effect Screening Levels (ESLs), chemical concentrations in the air that are considered safe for the general population (including vulnerable sub-populations) and that also protect against “welfare effects” (e.g. on plants). Comments on the document are invited by June 8th.

Texas Commission on Environmental Quality (2018). Development support documents. Diethanolamine and triethanolamine. Proposed, 8 March 2018. http://www.tceq.com/assets/public/implementation/tox/dsd/proposed/mar18/dea%20and%20tea.pdf

Isoprene. Final, 8 March 2018. https://www.tceq.texas.gov/assets/public/implementation/tox/dsd/final/isoprene.pdf

 

The above items were taken from the April 2018 issue of Toxicology and Regulatory News which is sent automatically to members of bibra.

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