IPC OPERATES A BOILER WHICH FIRES WOOD AND OIL, THE WASTE FUEL INCINERATOR (WFI), WHICH MAINE LICENSED IN 1977 TO BURN OIL AT A RATE LESS THAN 250 MILLION BTU/HR., THEREBY AVOID- ING NSPS APPLICATION. IPC HAS REPEATEDLY FIRED OIL IN THE WFI AT A RATE GREATER THAN 250 MILLION BTU/HR., MAKING THE NSPS APPLICABLE TO THE WFI'S EMISSIONS. THE WFI HAS REPEAT- EDLY VIOLATED THE PARTICULATES NSPS LIMIT, AND EPA HAS EVID- ENCE OF VIOLATIONS OF THE NITROGEN OXIDES LIMIT AS WELL. THE WFI VIOLATES THE SULFUR LIMIT WHEN FIRING OIL ALONE.