PORTLAND CEMENT ASSOCIATION AN ILLINOIS NOT-FOR-PROFIT CORPORATION, PETITIONER, v. WILLIAM D. RUCKELSHAUS, ADMINISTRATOR, ENVIRONMENTAL PROTECTION AGENCY, RESPONDENT. MEDUSA PORTLAND CEMENT CO. AND NORTHWESTERN STATES PORTLAND CEMENT CO., INTERVENORS. No. 72-1073.United States Court of Appeals, District of Columbia Circuit.Argued January 29, 1973. Decided June 29, 1973. As Amended on Denial of Rehearing October 1, 1973. Page […]