THIS CASE IS A JUDICIAL ACTION SEEKING INJUNCTIVE RELIEF AND CIVIL PENALTIES AGAINST USX CORP. AT ITS FAIRLESS HILLS, PENNSYLVANIA STEEL PRODUCING PLANT, FOR VIOLATIONS OF SEC- TION 110 OF THE CLEAN AIR ACT AND THE PENNSYLVANIA STATE IMPLEMENTATION PLAN PROMULGATED THEREUNDER. THE VIOLATIONS ASSERTED IN THIS ACTION INVOLVE VIOLATIONS OF THE PARTICUATE MATTER AND VISIBLE EMISSION STANDARDS AT THE SINTER PLANT ANS OPEN HEARTH SHOP AT THE FACILITY.