Approval and Promulgation of Air Quality Implementation Plans; Oregon; Removal of Perchloroethylene Dry Cleaning Systems Rules

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EPA is taking direct final action to approve a revision to the Oregon State Implementation Plan and repeal rules which are no longer required by the Clean Air Act. The revision consists of the repeal of Oregon's control technology guidelines for perchloroethylene (perc) dry cleaning systems and related definitions and provisions. Perc is a solvent commonly used in dry cleaning, maskant operations, and degreasing operations. In 1996, EPA excluded perc from the Federal definition of volatile organic compounds for the purpose of preparing state implementation plans to attain the national ambient air quality standards for ozone under title I of the Clean Air Act. Emissions from perc dry cleaners continue to be regulated as hazardous air pollutants under the National Emissions Standards for Hazardous Air Pollutants.