Approval and Promulgation of a State Implementation Plan for Photochemical Assessment Monitoring; Illinois

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The United States Environmental Protection Agency (USEPA) is approving a revision to the Illinois State Implementation Plan (SIP) for ozone. USEPA's action is based upon a revision request which was submitted by the State to satisfy the requirements for enhanced ozone monitoring in the Clean Air Act (Act). The Act requires the State to provide for establishment and maintenance of an enhanced ambient air quality monitoring network in the form of photochemical assessment monitoring stations (PAMS) by November 12, 1993. DATES: This rulemaking will be effective April 26, 1994, unless notice is received by March 28, 1994 that someone wishes to submit adverse comments. If the effective date is delayed, timely notice will be published in the Federal Register.