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Assessing and Managing Chemicals under TSCA

Enforceable Consent Agreement for Environmental Testing on Octamethylcyclotetrasiloxane (D4)

EPA entered into an Enforceable Consent Agreement with five manufacturers of octamethylcyclotetrasiloxane, which is widely used as a chemical intermediate and component of personal care products. The EPA required testing for the chemical’s presence in several environmental media.

Under the terms of the ECA, the signatory companies agreed to collect and analyze samples from environmental media around wastewater treatment plants (WWTP) that treat D4: (WWTP influent, WWTP effluent, and WWTP biosolids). In addition, downstream surface water, sediment, and biota were tested. The signatory companies completed the ECA testing requirements in September 2017. The information gathered by the ECA will be used in conjunction with other available data to assess exposures and risks due to environmental releases from D4. The final test report can be found in multiple sections in the docket (EPA-HQ-OPPT-2012-0209).

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