EDISON ELECTRIC INSTITUTE, ET AL., PETITIONERS, v. U.S. ENVIRONMENTAL PROTECTION AGENCY, RESPONDENT. No. 91-1586.United States Court of Appeals, District of Columbia Circuit.Argued December 11, 1992. Decided June 18, 1993. Page 327 [EDITORS’ NOTE: THIS PAGE CONTAINS HEADNOTES. HEADNOTES ARE NOT AN OFFICIAL PRODUCT OF THE COURT, THEREFORE THEY ARE NOT DISPLAYED.] Page 328 Douglas H. […]