FINA OIL AND CHEMICAL COMPANY IS AN OIL REFINERY LOCATED IN PORT AUTHUR, TEXAS. THE NPDES PERMIT # TX4201, ISSUED TO FINA ON 3/21/88 AND EFFECTIVE ON 9/22/88, ALLOWS THE DISCHARGE OF WASTEWATER FROM 5 OUTFALLS FOR THE FOLLOWING TYPES OF WASTEWATER: TREATED PROCESS AND UTILITY WASTEWATER, NONCONTACT COOLING WATER, FILTER BACKWASH AND STORMWATER RUNOFF. DURING THE PERIOD FROM 6/87 TO 2/92 THE FINA OIL AND CHEMICAL COMPANY EXPERIENCED AND REPORTED NUMEROUS EFFLUENT VIOLATIONS AND VISIBLE OIL SHEENS. IN ADDITION, A TOTAL OF 21 BYPASSES OCCURRED AND THERE WERE 25 INCIDENTS IN WHICH NO SAMPLE WAS TAKEN ON DAYS WHEN THERE WAS A DISCHARGE.