AO, ISSUED BY THE EPA UNDER THE AUTHORITY OF THE SDWA, 42 U.C. SECTION 300F-300J-26 1996 AND ITS IMPEMENTING REGULATIONS. AMONG OTHER THINGS THE AO FINDS THAT YOU HAVE VIOLATED THE NATIONAL PRIMARY DRINKING WATER REGULATIONS AT 40 C.F.R.AND 141.66 & 141.203.