{"abstract":"EPA is issuing this Advance Notice of Proposed Rulemaking (ANPR) to describe information currently available and information being collected that will be used by the Administrator to issue a subsequent proposal regarding whether, in the Administrator's judgment, aircraft lead emissions from aircraft using leaded aviation gasoline (avgas) cause or contribute to air pollution which may reasonably be anticipated to endanger public health or welfare. In this ANPR we describe and request comment on the data available for evaluating lead emissions, ambient concentrations and potential exposure to lead from the continued use of leaded avgas in piston-engine powered aircraft. We also describe and request comment on additional information being collected that will inform any future action. This ANPR is being issued to further respond to a petition submitted by Friends of the Earth (FOE) in 2006. Emissions of lead from piston-engine aircraft using leaded avgas comprise approximately half of the national inventory of lead emitted to air. There are almost 20,000 airport facilities in the U.S. at which leaded avgas may be used. EPA has long-standing concerns regarding exposure to lead, particularly during childhood. The most recent review and revision of the National Ambient Air Quality Standard (NAAQS) for lead, promulgated in 2008, found that serious health effects occur at much lower levels of lead in blood than previously identified and did not identify a safe level of lead exposure.","action":"Advance notice of proposed rulemaking.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2010/04/28/2010-9603.html","cfr_references":[{"chapter":null,"citation_url":null,"part":87,"title":40}],"citation":"75 FR 22440","comment_url":"http://www.regulations.gov/commenton/EPA-HQ-OAR-2007-0294-0100","comments_close_on":"2010-06-28","correction_of":null,"corrections":[],"dates":"Comments must be received on or before June 28, 2010.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2007-0294","FRL-9141-7"],"dockets":[{"supporting_documents":[{"title":"USEPA (2007) Lead: Human Exposure and Health Risk Assessments for Selected Case Studies [EPA-452/R-07-014a]","document_id":"EPA-HQ-OAR-2007-0294-0513"},{"title":"Advance Notice of Proposed Rulemaking on Lead Emissions from Piston-Engine Aircraft Using Leaded Aviation Gasoline. 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