{"abstract":"This action promulgates revisions to ambient air monitoring requirements for criteria pollutants. These revisions include adding and harmonizing definitions; clarifying annual monitoring network plan public notice requirements; revising network design requirements; system modifications and operating schedules; clarifying data certification, data submittal and archiving procedures; reorganizing and clarifying quality assurance requirements; and revising certain network design criteria for non-source oriented lead monitoring. These revisions also address other issues in the Ambient Air Quality Surveillance Requirements, to help reduce the compliance burden of monitoring agencies operating ambient monitoring networks.","action":"Final rule.","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/2016/03/28/2016-06226.html","cfr_references":[{"chapter":null,"citation_url":null,"part":58,"title":40}],"citation":"81 FR 17248","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on April 27, 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