EPA is moving forward to ease new source review (NSR) preconstruction permitting, agreeing with Arizona air officials’ decision that a semiconductor manufacturer does not need a permit to build initial stages of a planned facility, under a narrower definition of “begin actual construction” that appears likely to form the basis for a regulation next year. For now, the agency is implementing the policy on a case-by-case basis, starting with its approval of a semi-conductor facility in Maricopa County, AZ. But...