Portland Cement Ass'n v. Train

The court remanded to the Administrator of the Environmental Protection Agency, respondent, the case then before us involving the validity of the stationary source standards 1 he had promulgated 2 under section 111 of the Clean Air Act3 for new or modified portland cement plants. Portland Cement Association v. Ruckelshaus, 158 U.S.App.D.C. 308, 486 F.2d 375 (1973), cert. denied, 417 U.S. 921, 94 S.Ct. 2628, 41 L.Ed.2d 226 (1974). Some of the matters the court then reviewed on the petition of the Portland Cement Association we concluded required further consideration and clarification, hence…