TCEQ has recently finalised three DSDs. The first document covers ethylene dibromide, a heavy brominated hydrocarbon which has been used as a fuel additive. The Commission has also published the DSD for manganese and several inorganic manganese compounds. The final document released considers chlorine.

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).

Texas Commission on Environmental Quality (2017). Development support documents. Final, 29 November 2017.

Ethylene dibromide. https://www.tceq.texas.gov/assets/public/implementation/tox/dsd/final/edb.pdf

Manganese and inorganic manganese compounds. https://www.tceq.texas.gov/assets/public/implementation/tox/dsd/final/mn.pdf

Chlorine.  https://www.tceq.texas.gov/assets/public/implementation/tox/dsd/final/chlorine.pdf

 

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

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