RESPONDENT OWNS AND OPERATES A FACILITY AT 4300 N. PORT WASHINGTON ROAD IN MILWAUKEE, WISCONSIN. RESPONDENT IS A WISCONSIN CORPORATION WHOSE REGISTERED AGENT IS CT CORPORA- TION SYSTEM, 222 W. WASHINGTON, MADISON, WISCONSIN, 53703. ON OR AFTER JULY 21, 1981, RESPONDENT BURNED SPENT SOL- VENTS IN A HEAT RECOVERY BOILER, INLCUDING METHYL ETHYL KETONE AND TOLUENE (HAZARDOUS WASTE CODE F005); AND N-BUTYL ALCOHOL, XYLENE, CYCLOHEXANONE, METHYL ISOBUTYL KETONE AND ETHYL BENZENE, (HAZARDOUS WASTE CODE F003) WHICH HAVE BEEN IDENTIFIED OR LISTED IN NR 181.16(2) AS HAZARDOUS WASTES. REGULATION NR 181.12 STATES THAT ANY SOLID WASTE GENERATED FROM THE TREATMENT, STORAGE, OR DISPOSAL OF A HAZARDOUS WASTE INCLUDING ANY ASH IS A HAZARDOUS WASTE. AT THE TIME OF THE SEPTEMBER 28, 1983, SITE INSPECTION, SOLID WASTE ASH GENERATED FROM THE BURNING OF HAZARDOUS WASTE IN THE HEAT RECOVERY BOILER WAS NOT MANIFESTED AS HAZARDOUS WASTE. REGULATION NR 181.12(3)(B) STATES THAT ANY WASTE DESCRIBED IN NR 181.12(1)(B)(4) THAT IS LISTED UNDER NR 181.16, OR CONTAINING A WASTE LISTED UNDER NR 181.16 IS NOT A HAZARDOUS WASTE IF IT HAS BEEN EXCLUDED UNDER 40 CFR 260.20(C) AND 260.22. UNLESS AND UNTIL THE CRITERIA OF NR 181.12 ARE MET, A HAZARDOUS WASTE SHALL REMAIN A HAZARDOUS WASTE UNDER NR 181.12(3). AS OF THIS DATE, THE RESPONDENT HAS NOT SOUGHT EXCLUSION FOR THE ASH UNDER 40 CFR 260.20(C) AND 260.22. UNDER NR 181.22, THE GENERATOR MUST