SUMMARY DEF FAILED TO NOTIFY EPA OF RELOCATION AND DSCHRG ACTIV ITIES OF DRILLSHIP. VIOL OF NPDES PRMT, WHICH REQ 14 DAYS PRIOR NOTICE. DSCHRG WAS FR DRILLING SHIP CONDUCTING EXPLORATORY OIL/GAS DRILLING OFF CALIF COAST. EPA BELIEVES THAT ON OR ABOUT 07/01/83, SHIP MOVED TO NEW PARCEL AND BEGAN DSCHRG WHICH CONT UNTIL 09/30/83. DURING 92 DAYS FR JULY TO SEPT 30, DEF DSCHRGD TO PAC OCEAN VARIOUS CONSTITUENTS ASSOC W/DRILLING ACTIVITIES. INFO ON DAYS IN VIOL AND TYPE OF DSCHRG RECEIVED FR DEF VIA CWA 308 REQUEST FOR INFO. ACTIONS OF DEF DENY EPA ABILITY TO LOC POINT OF DSCHRG UNTIL AFTER DSCHRG COMMENCED AND TO DETERMINE IF DSCHRGS AT NEW LOCATION APPROP REGULATED BY GEN PRMT. PNLTYS MUST BE OBTAINED TO PROVIDE DETERRENCE OF UNAUTHORIZED ACTIVITY.