METRO VIOLATED THE PARTICULATE STANDARDS IN THE MINNESOTA ST ATE IMPLEMENTATION PLAN (SIP) AND IN THE NSPS STANDARD FOR SEWAGE TREATMENT PLANTS IN THE OPERATION OF ITS SLUDGE INCINERATORS. THESE VIOLATIONS ARE BASED UPON STACK TESTS AND UPON CALCULATION OF UNCONTROLLED EMISSIONS FROM EMERGEN- CY STACKS AT THE INCINERATORS. METRO ALSO FAILED TO OPERATE ITS FACILITY IN A MANNER CONSISTENT WITH GOOD AIR POLLUTION CONTROL PRACTICES FOR MINIMIZING EMISSIONS IN VIOLATION OF 40 C.F.R. SEC. 60.11(D) AND FAILED TO INSTALL COM DEVISES IN ACCORDANCE WITH THE SIP.