Need for Agency to Address Chemistry under Appendix W Sierra Club filed a lawsuit against EPA on August 31, 2011 alleging that EPA is unreasonably delayed in : –responding to an administrative petition for rulemaking to identify air quality models for ozone and PM2.5 to use in evaluating applications for PSD permits under the Clean Air Act, and –taking action required under the Clean Air Act §165(e)(3)(D) to designate such models through rulemaking.
{}