SHELL OIL CO. OWNS AND OPERATES AN OIL REFINERY AND MANUFACTURING COMPLEX LOCATED IN MARTINEZ CALIFORNIA. THIS CASE ARISES UNDER THE CLEAN WATER ACT AND CONCERNS VIOLA- TIONS OF SHELL'S NPDES PERMIT AS WELL AS VIOLATIONS OF SPILL PREVENTION CONTROL AND COURT MEASURE (SPCC) REGULATIONS PROMULATED UNDER THE AUTHORITY OF SECTION 311 OF THE ACT. ON APRIL 22-23, 1988 THERE WAS AN OIL SPILL FROM SHELL'S FACILITY THAT DISCHARGED APPROXIMATELY 450,000 GALLONS OF CRUDE OIL INTO A SLOUGH, ADJACENT WETLANDS AND THE SAN FRANCISCO BAY. THIS SPILL RESULTED IN VIOLATIONS OF SHELL'S NPDES PERMIT AND WAS CAUSED BY VIOLATIONS OF SHELL'S SPCC PLAN AND REGULATIONS. THIS ENFORCEMENT ACTION VIOLATIONS OF SHELL'S SPCC PLAN AND REGUALTIONS. THIS ENFORCEMENT ACTION IS SEEKING INJUNCTION RELIEF FOR DAMAGES TO NATURAL RESOUCES, PENALTIES AND COST RECOVERY. EPA IS ONE OF SEVERAL FEDERAL, STATE & LOCAL AGENCIES PURSUING A COORDINATED ACTION.