THE COUNTY SANITATION DISTRICTS OF LOS ANGELES COUNTY ( LASAN ) HAVE THREE COMBINED CYCLE GAS TURBINES WHICH ARE GOVERNED BY 40 C.F.R. PART 60, SUBPART GG. THEREFORE, UNDER 40 C.F.R. S 60.8, LASAN WAS REQUIRED TO CONDUCT PERFORMANCE TESTS FOR THESE TURBINES WHITHIN 180 DAYS OF THEIR INITIAL STARTUP. WHILE OPERATION SUMMARIES RECEIVED BY REGION 9 INDICATE THAT IT WAS PHYSICALLY IMPOSSIBLE TO TEST ONE OF THE TURBINES, THE EVIDENCE COLLECTED THUS FAR SHOWS THAT WITH RESPECT TO TWO OF THE TURBINES, STARTUP OCCURED IN JANUARY 1986, AND AS OF AUGUST 1988, LASAN STILL HAD NOT CONDUCTED THE REQUIRED PERFORMANCE TEST.