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The EPA is developing a final rule related to an April 2015 proposal to require reporting and recordkeeping requirements under section 8(a) of the Toxic Substances Control Act (TSCA) for certain chemical substances when they are manufactured or processed at the nanoscale. Specifically, the EPA proposed to require persons that manufacture (defined by statute to include import) or process, or intend to manufacture or process these chemical substances to electronically report to EPA certain information, which includes the specific chemical identity, production volume, methods of manufacture and processing, exposure and release information, and existing data concerning environmental and health effects. This proposal involves one-time reporting for existing nanoscale materials and one-time reporting for new discrete nanoscale materials before they are manufactured or processed. This information would facilitate the EPA's evaluation of the materials and a determination of whether further action, including additional information collection, is needed. Consistent with the President's memorandum for Executive Agencies regarding Principles for Regulation and Oversight of Emerging Technologies, this rule would facilitate assessment of risks and risk management, examination of the benefits and costs of further measures, and making future decisions based on available scientific evidence.