Notice of Approval of Clean Air Act Prevention of Significant Deterioration Permit for Ocotillo Power Plant

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This notice announces that the Maricopa County Air Quality Department (MCAQD) issued a final permit decision to Arizona Public Service (APS) for a major modification of a Clean Air Act Prevention of Significant Deterioration (PSD) permit (Permit No. PSD16-01). The PSD permit decision authorizes a major modification at the Ocotillo Power Plant, located in Tempe, Arizona, primarily for the purposes of constructing five simple cycle natural gas-fired combustion turbines, including ancillary equipment. The MCAQD is authorized to issue PSD permit decisions pursuant to a delegation agreement with the EPA, in which the MCAQD "stands in the shoes" of the EPA when administering certain elements of the PSD permitting program. This MCAQD-issued PSD permit decision is considered to be a federally-issued PSD permit decision, and serves as a final agency action by the EPA.