ON APRIL 13, 1995, U.S. EPA ISSUED A NOTICE OF VIOLATION (NOV) TO MARATHON FOR VIOLATIONS OF THE CARBON MONOXIDE EMISSION LIMIT AT ITS FLUID CATALYTIC CRACKING UNIT-CARBON MONOXIDE BOILER (FCCU-CO BOILER). MARATHON CONDUCTED A CO STACK TEST ON THE EXHAUST GAS FROM FCCU-CO BOILER ON AUGUST 4 AND 5, 1993, AND FAILED TO MEET THE LIMIT OF 200 PPM SET FORTH IN ILLINOIS POLLUTION CONTROL BOARD RULE 216.31, WHICH IS PART OF THE ILLINOIS SIP. ALSO, MARATHON HAS VIOLATED LAND DISPOSAL RESTRICTION REQUIREMENTS PROMULGATED PURSUANT TO RCRA. SPECIFICALLY, AS IDENTIFIED DURING A RECORD REVIEW BY THE ILLINOIS ENVIRONMENTAL PROTECTION AGENCY, MARATHON FAILED TO PROPERLY DETERMINE WHETHER F037 WASTE, A LISTED WASTE IN 40 CFR PART 261, SUBPART D (GENERATED FROM THE CLEANING OF THE COKER SEWERS) WAS RESTRICTED FROM LAND DISPOSAL, IN VIOLATION OF 40 CFR 268.7(A). SECOND, MARATHON LAND DISPOSED OF UNTREATED F037 HAZARDOUS WASTE GENERATED FROM THE PLANT 5 AND 809 SUMPS ON SIX SEPERATE DATES AFTER THE EFFECTIVE DATE OF 40 CFR 268.36(B), WHICH PROVIDES THAT F037 LISTED WASTE IS PROHIBITED FROM LAND DISPOSAL UNLESS THE WASTE MEETS THE APPLICABLE STANDARDS SPECIFIED IN 40 CFR PART 268, SUBPART D. MARATHON OIL COMPANY ( MARATHON ) OWNS AND OPERATES A PETROLEUM REFINERY IN ROBINSON, ILLINOIS. ON MARCH 29, 1996, FOLLOWING NOTIFICATION TO THE STATE