Approval and Promulgation of Air Quality Implementation Plans; States of Montana and Wyoming; Revisions to the Administrative Rules of Montana; New Source Performance Standards for Wyoming and Montana

EPA is proposing to take direct final action approving State Implementation Plan (SIP) revisions submitted by the Governor of Montana on October 28, 2002. The October 28, 2002 submittal revises the Administrative Rules of Montana (ARM) by updating the Incorporation by Reference rules, deleting the definition for volatile organic compounds (VOCs), and making other minor corrections to the rules. The October 28, 2002 submittal also makes revisions to the Yellowstone County Air Pollution Control Program (YCAPCP). EPA is only approving the revisions to the section of the YCAPCP that has been approved into the SIP. EPA is also announcing that on June 24, 2003 and August 13, 2003, we updated the delegation of authority for the implementation and enforcement of the New Source Performance Standards (NSPS) to the State of Montana and the State of Wyoming, respectively. The intended effect of this action is to make these revisions federally enforceable. This action is being taken under sections 110 and 111 of the Clean Air Act. In the "Rules and Regulations" section of this Federal Register, EPA is approving the State's SIP revision as a direct final rule without prior proposal because the Agency views this as a noncontroversial SIP revision and anticipates no adverse comments. A detailed rationale for the approval is set forth in the preamble to the direct final rule. If EPA receives no adverse comments, EPA will not take further action on this proposed rule. If EPA receives adverse comments, EPA will withdraw the direct final rule and it will not take effect. EPA will address all public comments in a subsequent final rule based on this proposed rule. EPA will not institute a second comment period on this action. Any parties interested in commenting must do so at this time. Please note that if EPA receives adverse comment on an amendment, paragraph, or section of this rule and if that provision may be severed from the remainder of the rule, EPA may adopt as final those provisions of the rule that are not the subject of an adverse comment.