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EPA is proposing to extend the compliance dates for certain restrictions of TSCA section 6(a) final rules addressing the unreasonable risk presented by methylene chloride, trichloroethylene (TCE), perchloroethylene (PCE), and carbon tetrachloride (CTC). Section 6(a) of TSCA requires EPA to address unreasonable risk of injury to health and/or the environment that the Administrator has determined is presented by a chemical substance under its conditions of use following a risk evaluation carried out under the authority of TSCA section 6(b). EPA is proposing to extend these compliance dates for certain activities to avoid disruption of important functions of various entities potentially affected by the 2024 final rules. EPA's final rule, Methylene Chloride; Regulation Under the Toxic Substances Control Act (TSCA), published on May 8, 2024, is in EPA docket EPA-HQ-OPPT-2020-0465. EPA's final rule, Trichloroethylene (TCE); Regulation Under the Toxic Substances Control Act (TSCA), published on December 17, 2024, is in docket EPA-HQ-OPPT-2020-0642. EPA's final rule, Perchloroethylene (PCE); Regulation Under the Toxic Substances Control Act (TSCA), published December 18, 2024, is in docket EPA-HQ-OPPT-2020-0720. EPA's final rule, Carbon Tetrachloride (CTC); Regulation Under the Toxic Substances Control Act (TSCA), published December 18, 2024, is in docket EPA-HQ-OPPT-2020-0592.