THIS REFERRAL SEEKS INJUNCTIVE RELIEF AND CIVIL PENALTIES AGAINST ULTRAMAR DIAMOND SHAMROCK (FORMERLY KNOWN AS COLORADO REFINING COMPANY) FOR VIOLATIONS AND POTENTIAL VIOLATIONS THAT OCCURRED AT ITS PETROLEUM REFINERY IN COMMERCE CITY, COLORADO. NOTE: COLORADO REFINING COMPANY WAS PURCHASED BY ULTRAMAR DIAMOND SHAMROCK IN NOVEMBER 2001 AND ON DECEMBER 19, 2001, VALERO ENERGY CORPORATION PURCHASED ULTRAMAR DIAMOND SHAMROCK. REGION 8 HAS NOT CALCULATED A CIVIL PENALTY FOR POTENTIAL CAA VIOLATIONS SINCE WE DID NOT UNDERTAKE AN INVESTIGATION OF SUCH VIOLATIONS.