1. SECTION 1423(C) OF THE SAFE DRINKING WATER ACT ( SDWA ), 42 U.S.C. SECTION 300H-29C). 2. NORTHBROOK OIL AND GAS COMPANY, AN OKLAHOMA COMPANY P.O. BOX 14055 OKLAHOMA CITY, OKLAHOMA COUNTY, OKLAHOMA 73113 WELLS: INV. NO. OK0060, WELL NO. 11, SW/4, SEC. 18, T 3S, R 11W INV. NO. OK0065, WELL NO. 3, NW/4, SEC. 19, T 3S, R 11W COTTON COUNTY, OKLAHOMA 3. RESPONDENT WAS IN VIOLATION OF SECTION 1421 OF THE SDWA BY: 1) FAILURE TO HAVE MECHANICAL INTEGRITY; AND 2) FAIL- URE TO PLUG AND ABANDON WITHIN TWO YEARS AFTER CESSATION OF INJECTION OPERATIONS. 4. RELIEF SOUGHT PURSUANT TO SECTION 1423(C) OF THE SDWA, EPA ISSUED THE RESPONDENT A PROPOSED ADMINISTRATIVE ORDER (AO) THAT WOULD REQUIRE THE RESPONDENT TO: A) PLUG THE WELLS ACCORDING TO REGULATIONS WITHIN 30 DAYS AFTER THE EFFECTIVE DATE OF THE AO.