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Following promulgation of May 2024 TSCA section 6(a) final rule addressing the unreasonable risk presented by methylene chloride under its conditions of use, non-federally contracted public and private sector laboratories that use methylene chloride have indicated to EPA that there are challenges in implementing the Workplace Chemical Protection Program (WCPP) for methylene chloride. The first general industry deadline for complying with the WCPP requirements for methylene chloride is begins on May 5, 2025, with full implementation concluding on October 30, 2025. EPA intends to reconsider the rule’s requirements for laboratories either through a rulemaking or interpretative guidance. As an interim step, EPA has initiated an action to extend the WCPP deadlines for such laboratories to comply with the WCPP requirements for methylene chloride while also considering whether to adjust the WCPP requirements for methylene chloride as they apply to laboratories.