Approval and Promulgation of Implementation Plans for Arizona and California; General Conformity Rules

This action approves various revisions to State Implementation Plans (SIP) which contain regulations for implementing and enforcing the general conformity rules which the EPA promulgated on November 30, 1993. EPA is approving SIP revisions which contain general conformity rules for the Arizona SIP and the California SIP for the following California Air Pollution Control Districts (APCD) and Air Quality Management Districts (AQMD): El Dorado County APCD, Great Basin Unified APCD, Monterey Bay Unified APCD, San Joaquin Valley Unified APCD, Santa Barbara County APCD, South Coast AQMD, Feather River AQMD, Placer County APCD, Sacramento Metro AQMD, Imperial County APCD, Bay Area AQMD, San Diego County APCD, Butte County AQMD, Ventura County APCD, Mojave Desert AQMD and Yolo-Solano AQMD. The approval of these general conformity rules into the SIP will result in the SIP criteria and procedures governing general conformity determinations instead of the Federal rules at 40 CFR Part 93, Subpart B for those actions under the jurisdiction of the SIPs. Federal actions by the Federal Highway Administration and Federal Transit Administration (under Title 23 U.S.C. or the Federal Transit Act) are covered by the transportation conformity rules under 40 CFR Part 51, Subpart T-Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Act (and 40 CFR Part 93, Subpart A) and are not affected by this action. EPA approves these SIP revisions under sections 110(k) and 176(c) of the Clean Air Act (CAA or the Act). A more detailed discussion of this action is provided below and in the support documentation.