Approval and Promulgation of Implementation Plans; State of Missouri

EPA is approving a rule revision submitted by the state of Missouri to clarify that any credible evidence (referenced as the "CE revisions" or "CE" throughout this document) may be used to establish compliance or noncompliance with applicable requirements of the Missouri air pollution control regulations under the authority of applicable provisions in section 110(a) of the Clean Air Act (the "Act") (CAA). EPA proposed approval of the Missouri rule on February 6, 1996. The proposal was accompanied by a direct final rule approving the Missouri submission. In that rule, EPA stated that the rule would become final if no adverse comments were received, but that if EPA received adverse comments, it would withdraw the final rule, treat the action as a proposed rulemaking, and respond to the comments prior to taking a final action. Because it received adverse comments, EPA withdrew the final action. We are now taking final action to approve the rule. Public comments are addressed in this action and in a Response to Comments document.