Federal Register - "Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; Infrastructure Requirements for Nitrogen Dioxide and Sulfur Dioxide"

Title: Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; Infrastructure Requirements for Nitrogen Dioxide and Sulfur Dioxide Source: Federal Register Data/Action: Environmental Protection Agency (Final Rule) Date: 8/21/2018 Text Preview: ...ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2015-0472; FRL-9982-23--Region 9] Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; Infrastructure Requirements for Nitrogen Dioxide and Sulfur Dioxide AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. ----------------------------------------------------------------------- SUMMARY: The Environmental Protection Agency (EPA)... ...EPA is reclassifying Pima County from Priority II to Priority III for SO 2 emergency episode planning purposes. The EPA is also approving into the Arizona SIP sections of an Arizona Revised Statute related to air quality modeling and the submission of modeling data to the EPA. Finally, the EPA is clarifying several inconsistencies between its technical support document and notice of proposed rulemaking. DATES: This rule is effective on September 20, 2018. ADDRESSES: The EPA has established a docket for this action under Docket ID No. EPA-R09-OAR-2015-0472... ...EPA Region IX, (415) 972-3963, [email protected] . SUPPLEMENTARY INFORMATION: Throughout this document, the terms ``we,'' ``us,'' and ``our'' refer to the EPA...