A bill to amend the Clean Air Act with respect to the approval of revisions of implementation plans for standards in air quality control regions.

Amends the Clean Air Act to provide that a revision of an implementation plan concerning standards of air quality control in an air quality control region will have met the requirements of the Act where ambient air monitoring for four consecutive quarters (prior to the publication of proposed rulemaking on the revision) of operation at emission levels contemplated by the revision has recorded no violation of primary or secondary ambient air quality standards for the pollutants affected by the revision within the area significantly affected by the revision, unless demonstrated that such monitoring was substantially inadequate to measure compliance with such standards.