FAILURE TO MAKE A DETERMINATION OF WHETHER ITS SOLID WASTES WERE HAZARDOUS WASTES CONSTITUTES A VIOLATION OF 40 CFR 262.11. FAILURE TO OBTAIN AN EPA IDENTIFICATION NUMBER IS A VIOLATION OF 40 CFR 262.12. STORE HAZARDOUS WASTE AT THE CASPER FACILITY FROM, AT LEAST, APPROXIMATELY DECEMBER 1985, UNTIL RESPONDENT VACATED THE CASPER FACILITY IN AUGTUST 1987, WITH NEITHER A PERMIT NOR INTERIM STATUS, CONSTITUTES A VIOLATION OF SECTION 3005 OF RCRA, 42 U.S.C. 6925. STORE HAZARDOUS WASTE AT THE CASPER FACILITY FROM THE DATE OF ABANDONMENT, WITH NEITHER A PERMIT NOR INTERIM STATUS, CONSTITUTES A VIOLATION OF SECTION 3005 OF RCRA, 42 U.S.C. 6925. FAILURE TO HAVE A WRITTEN CLOSURE PLAN IS A VIOLATION OF 40 CFR 265.110. FAILURE TO PROVIDE WRITTEN NOTICE TO ITS SUCCESSOR WHEN IT ABANDONED THE CASPER FACILITY IN APPROXIMATELY AUGUS 1989 IS A VIOLATION OF 40 CFR 264.12.