220 F.3d 683 (5th Cir. 2000) CENTRAL AND SOUTH WEST SERVICES, INC.; ENTERGY SERVICES INC.; MISSISSIPPI POWER COMPANY; UTILITY SOLID WASTE ACTIVITIES GROUP, Petitioners,v.UNITED STATES ENVIRONMENTAL PROTECTION AGENCY, Respondent.THE GENERAL ELECTRIC COMPANY, Petitioner,v.UNITED STATES ENVIRONMENTAL PROTECTION AGENCY, Respondent.SIERRA CLUB, a non-profit California corporation, Petitioner,v.UNITED STATES ENVIRONMENTAL PROTECTION AGENCY, Respondent. No. 98-60495, No. 98-60642 AND No. […]