Approval and Promulgation of State Implementation Plans; Oregon

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EPA is approving a State Implementation Plan (SIP) revision submitted by the state of Oregon. This revision establishes and requires the implementation of an oxygenated gasoline program in the Clackamas, Jackson, Multnomah, Washington and Yamhill counties, and an eleven by twelve mile area surrounding Klamath Falls and a nine mile by nine mile area surrounding Grants Pass. This SIP revision was submitted to satisfy the requirement of section 211(m) of the Clean Air Act, as amended (CAA), which requires all carbon monoxide nonattainment areas with a design value of 9.5 parts per million (ppm) or greater based generally on 1988 and 1989 air quality monitoring data to implement an oxygenated gasoline program. The intended effect of this action is to approve the oxygenated gasoline program. This action is being taken under Section 110 of the CAA.