WREG prepared the Prevention of Significant Deterioration (PSD) and operating permit application for the Panda Gila River Project in Maricopa County, Arizona. The project was developed by Panda Gila River, LP. The project is a combined-cycle combustion turbine facility capable of generating 2,080 megawatts of electrical power. WREG prepared an initial permit application including emission estimates, applicable requirements identification, Best Available Control Technology (BACT) analyses, and an air quality impact analysis. During the permit review and negotiation process, WREG conducted analyses on fugitive particulate matter emission reductions associated with the project, and prepared an ambient particulate matter monitoring plan/Quality Assurance Project Plan (QAPP). WREG also prepared documentation required under the Acid Rain Provisions of the Clean Air Act for submission.