TSCA Risk Evaluation

A TSCA Risk Evaluation is a formal scientific and regulatory review conducted by the U.S. EPA under the Toxic Substances Control Act to determine whether a chemical presents an unreasonable risk to human health or the environment. For asbestos, EPA has issued evaluations identifying conditions of use (such as chlor-alkali diaphragms, sheet gaskets, brake blocks, and legacy products) that present unreasonable risks, triggering regulatory action. The evaluation considers exposure pathways, vulnerable populations, and disease endpoints including mesothelioma and lung cancer.

Origin

TSCA was enacted in 1976, but the risk evaluation framework was substantially overhauled by the Frank R. Lautenberg Chemical Safety for the 21st Century Act of 2016. Asbestos was named one of the first ten chemicals for evaluation under the new law, with EPA issuing Part 1 of its asbestos risk evaluation in December 2020 and Part 2 (covering legacy uses and associated disposals) in December 2024. A final rule banning ongoing uses of chrysotile asbestos was issued in March 2024.

Significance in Asbestos Context

For patients and families, TSCA Risk Evaluations are powerful, contemporary federal acknowledgments that asbestos (including chrysotile, which industry long defended as safe) causes mesothelioma, lung cancer, ovarian cancer, and laryngeal cancer, even at the exposure levels still occurring in modern American workplaces and consumer products. The findings can support claims that defendants knew or should have known their products were dangerous well after older exposures occurred. The evaluations also identify specific industries and product categories (chlor-alkali plants, automotive aftermarket, gasket and packing manufacturers, talc-containing consumer products in Part 2) that may correspond directly to a patient's exposure history, helping document where and how exposure happened.

Example Sentence

Her attorney cited EPA's 2020 TSCA Risk Evaluation to show that even small amounts of chrysotile asbestos in the brake work her husband performed posed an unreasonable risk of mesothelioma.

Related Terms

Toxic Substances Control Act, EPA Asbestos Ban, Chrysotile, Legacy Uses, Unreasonable Risk, Lautenberg Act

Notes

• If your exposure involved chlor-alkali work, gaskets, brakes, or talc-containing products, ask your legal team whether the relevant TSCA Risk Evaluation findings apply to your case.
• Preserve any employment records, product identifications, or purchase records that tie your exposure to a use category EPA has now found to present unreasonable risk.
• Part 2 of the evaluation (December 2024) addresses legacy uses such as older insulation, floor tile, and asbestos-containing talc, relevant for many historical and consumer exposures; ask whether it applies to your exposure history.
• The risk evaluations cite peer-reviewed evidence on dose, fiber type, and disease; your medical experts may reference them to connect your diagnosis to documented exposure scenarios.