Approval and Promulgation of Air Quality Implementation Plans; Delaware, the District of Columbia, Maryland, Pennsylvania, Virginia; Revisions to the State Implementation Plans (SIPs) Addressing Ozone Monitoring

Résumé

EPA proposes to approve revisions to the following states State Implementation Plans (SIPs) for ozone: Delaware, the District of Columbia, Maryland, Pennsylvania, and Virginia. This action is based upon revision requests submitted by these states to satisfy the requirements of the Clean Air Act, as amended November 15, 1990 and the Photochemical Assessment Monitoring Stations (PAMS) regulations. The PAMS regulation required states to provide for the establishment and maintenance of an enhanced ambient air quality network in the form of PAMS by November 12, 1993. In the Final Rules section of this Federal Register, EPA is approving these states' SIP revisions as a direct final rule without prior proposal because the Agency views these as noncontroversial SIP revisions and anticipates no adverse comments. A detailed rationale for the approval is set forth in the direct final rule. If no adverse comments are received in response to this proposed rule, no further activity is contemplated in relation to this rule. If EPA receives adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed