Active Rulemaking | State Implementation Plan Rules for Specific Locations — Rillito PM10 Nonattainment Area

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State Implementation Plan Rules for Specific Locations — Rillito PM10 Nonattainment Area

Posted On: Oct. 7th, 2024 - 12:23 pm

Revised on: Sept. 30, 2024 - 9:30 a.m.

Summary:

This rulemaking is necessary to develop an EPA-approvable nonattainment area (NAA) state implementation plan (SIP) revision for the Rillito PM10 NAA under section 172 of the Clean Air Act (CAA) since PM10 reductions at the CalPortland Rillito cement plant may be necessary in order for the Rillito area to attain the PM10 National Ambient Air Quality Standard (NAAQS). ADEQ anticipates EPA issuing a SIP call for the Rillito NAA under CAA § 110(k)(5), which would require the submission of a nonattainment area plan meeting the requirements of CAA Section 172. Upon issuance of the anticipated SIP call, this rulemaking will be necessary in order to develop adequate controls for the Rillito NAA, without which EPA would be required to impose sanctions, including the loss of federal highway funds, for failure to submit a satisfactory state plan or plan item required under the CAA. In addition, EPA would be required to adopt a federal implementation plan (FIP) imposing the necessary controls.

Documents:

  • Notice of Docket Opening | View >