Approval and Promulgation of Air Quality Implementation Plans; Commonwealth of Pennsylvania; Oxygenated Gasoline Program

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EPA proposes to approve the State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The revision makes the oxygenated gasoline program a contingency measure for the five-county Philadelphia area, which means that the oxygenated gasoline program would only be required to be implemented in the five-county Philadelphia area if there is a violation of the carbon monoxide (CO) national ambient air quality standard (NAAQS). The revision also makes technical amendments to the oxygenated gasoline regulation. In the ``Rules and Regulations'' section of this Federal Register, EPA is approving the State's SIP submittal as a direct final rule without prior proposal because the Agency views this as a noncontroversial submittal and anticipates no adverse comments. A more detailed description of the state submittal and EPA's evaluation are included in a Technical Support Document (TSD) prepared in support of this rulemaking action. A copy of the TSD is available, upon request, from the EPA Regional Office listed in the ADDRESSES section of this document. If EPA receives no adverse comments, EPA will not take further action. If EPA receives adverse comments, EPA wil