federal_register: 2011-21359

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document_number title type abstract publication_date pub_year pub_month html_url pdf_url agency_names agency_ids excerpts
2011-21359 Review of National Ambient Air Quality Standards for Carbon Monoxide Rule This rule is being issued at this time as required by a court order governing the schedule for completion of this review of the air quality criteria and the national ambient air quality standards (NAAQS) for carbon monoxide (CO). Based on its review, the EPA concludes the current primary standards are requisite to protect public health with an adequate margin of safety, and is retaining those standards. After review of the air quality criteria, EPA further concludes that no secondary standard should be set for CO at this time. EPA is also making changes to the ambient air monitoring requirements for CO, including those related to network design, and is updating, without substantive change, aspects of the Federal reference method. 2011-08-31 2011 8 https://www.federalregister.gov/documents/2011/08/31/2011-21359/review-of-national-ambient-air-quality-standards-for-carbon-monoxide https://www.govinfo.gov/content/pkg/FR-2011-08-31/pdf/2011-21359.pdf Environmental Protection Agency 145 This rule is being issued at this time as required by a court order governing the schedule for completion of this review of the air quality criteria and the national ambient air quality standards (NAAQS) for carbon monoxide (CO). Based on its review,...

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