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EPA's regulations governing the use of Polychlorinated Biphenyls (PCBs) in electrical equipment and other applications were first issued in the late 1970s and have not been updated since 1998. EPA has initiated rulemaking to reassess the ongoing authorized uses of PCBs to determine whether certain use authorizations should be ended or phased out because they can no longer be justified under section 6(e) of the Toxic Substances Control Act, which requires that the authorized use will not present an unreasonable risk of injury to health and the environment. As the first step in this reassessment, EPA published an Advanced Notice of Proposed Rulemaking (ANPRM)in 2010, and took comment through August 20, 2010. EPA reviewed and considered all comments received on the ANPRM in planning the current rulemaking. This action will address the following specific areas: (1) the use, distribution in commerce, marking and storage for reuse of liquid PCBs in electric equipment; (2) improvements to the existing use authorization for natural gas pipelines; and (3) definitional and other regulatory "fixes." The reassessment of use authorizations related to liquid PCBs in equipment will focus on small capacitors in fluorescent light ballasts, large capacitors, transformers and other electrical equipment. In addition, revised testing, characterization, and reporting requirements for PCBs in natural gas pipeline systems to provide more transparency for the Agency and the public when PCB releases occur will be considered. Consistent with Executive Order 13563, "Improving Regulation and Regulatory Review," wherever possible and consistent with the overall objectives of this rulemaking, the Agency will also eliminate or fix regulatory inefficiencies noted by the Agency or in public comments on the ANPRM.