CIRCUIT LOGIC, INC. OPERATES A FACILITY IN ESCONDIDO THAT MANUFACTURES PRINTED CIRCUIT BOARDS. PRINTED CIRCUIT BOARDS MANAFACTURING IS A METAL FINISHING OPERATION. CIRCUIT LOGIC DISCHARGES INDUSTRIAL PROCESS WASTEWATER FROM ITS FACILITY TO THE CITY OF ESCONDIDO'S HALE AVENUE RESOURCE RECOVERY FACILITY. CIRCUIT LOGIC BEGAN OPERATION IN 1989. SINCE FEBRUARY 15, 1986, NEW METAL FINISHERS THAT DISCHARGE TO SEWAGE TREATMENT PLANTS HAVE BEEN REQUIRED TO COMPLY WITH PRETREATMENT STANDARDS AT 40 C.F.R. 433 GOVERNING THE CHARACTER OF THEIR INDUSTRIAL WASTEWATER. CIRCUIT LOGIC HAS VIOLATED LIMITS GOVERNING ITS WASTEWATER QUALITY RESULTING IN AT LEAST 879 DAYS OF VIOLATION. CIRCUIT LOGIC WAS EXPECTED TO ACHIEVE FULL COMPLIANCE AT THE FACILITY IN NOVEMBER 1995 BY INSTALLING AN ION EXCHANGE UNIT. BEFORE INSTALLATION OF TREATMENT CIRCUIT LOGIC HAD NOT DEMONSTRATED AN ABILITY TO CONSISTENTLY MEET ALL OF ITS STANDARDS. INITIALLY REG 9 SOUGHT A JUDICIAL ACTION TO ASSESS PENALTIES FOR CIRCUIT LOGIC'S PAST VIOLATIONS. IN OCTOBER 1995 THE CIRCUIT LOGIC MATTER WAS REFERRED TO DOJ, BUT AFTER CONSIDERATION, DOJ SENT THIS CASE BACK TO REG 9 IN SEPTEMBER 1996, DECLINING TO BRING THE CASE JUDICIALLY. THE REGION SUBSEQUENTLY FILED THE PRESENT ADMINISTRATIVE ACTION.