PARTICULATE MATTER, OPACITY AND CO EMISSIONS, LIMIT VIOLATIONS. REGION V FILED THE ADMINISTRATIVE COMPLAINT IN THIS MATTER ON OCTOBER 25, 1995. THE COMPLAINT ALLEGED THAT THE REFINERY'S EMISSIONS FROM THE FLUIDIZED CATALYTIC CRACKING UNIT (FCCU) AND CO BOILERS EXCEEDED THE 30 PERCENT OPACITY LIMIT SET FORTH AT 35 ILL. ADMIN. CODE SEC. 212.123(B) ON 9 DAYS DURING OCTOBER, NOVEMBER AND DECEMBER 1994; THAT STACK TESTING INDICATED THAT IN ONE OF THREE TEST RUNS PERFORMED, MOBIL EXCEEDED THE ALLOWABLE EMISSION RATE CALCULATED BY THE METHOD SET FORTH IN 36 ILL. ADMIN. CODE SEC. 212.381; THAT STACK TESTING INDICATED THAT MOBIL EXCEEDED THE ALLOWABLE 200 PPM EMISSION CONCENTRATION SET FORTH IN 35 ILL. ADMIN. CODE SEC. 216.361; AND THAT MOBIL FAILED TO COMPLY WITH AN EPA SECTION 114 INFORMATION REQUEST BY FAILING TO CONDUCT THE DECEMBER 1994 EMISSIONS TESTING UNDER NORMAL