BACKGROUND AND NATURE OF THE CASE ON FEBRUARY 7, 1986, REGION V ISSUED A NOTICE OF VIOLA- TION TO THE STATE OF MICHIGAN DEPARTMENT OF MENTAL HEALTH FOR EMITTING VISIBLE AIR CONTAMINANTS INTO THE ATMOSPHERE IN VIOLATION OF MAPCC RULE R336.1301, WHICH IS PART OF THE FEDERALLY APPROVED AND ENFORCEABLE MICHIGAN SIP. VISIBLE EMISSIONS FROM THREE OF NORTHVILLE HOSPITAL'S BOILERS HAVE CONSISTENTLY EXCEEDED THESE LIMITS FOR SEVERAL YEARS. CAUSE OF ACTION U.S. EPA IS AUTHORIZED TO BRING SUIT TO ABATE SIP VIOLATIONS AND RECOVER PENALTIES UNDER SECTION 113 OF THE CLEAN AIR ACT, 42 U.S.C. SECTION 7413. PROPOSED REMEDY IN ORDER TO ACHIEVE COMPLIANCE WITH THE MICHIGAN SIP, NORTHVILLE HOSPITAL WOULD HAVE TO INSTALL POLLUTION CONTROL EQUIPMENT THAT WILL REDUCE THE VISIBLE AIR CONTAMINANTS EMITTED FROM ITS BOILERS. ISSUES OF NATIONAL AND PRECEDENTIAL SIGNIFICANCE THERE ARE NO ISSUES OF NATIONAL OR PRECEDENTIAL SIGNI- FICANCE. STATUTORY BASIS SECTION 113(B) OF THE CLEAN AIR ACT, 42 U.S.C. SECTION 7413(B) DEFENDANT STATE OF MICHIGAN DEPARTMENT OF M