WEYERHAEUSER HAS VIOLATED THE WISCONSIN SIP AT ITS PLANT IN ROTHSCHILD, WISCONSIN. ON OCTOBER 14, 1988, THE REGION ISSUED A NOTICE OF VIOLATION TO WEYERHAEUSER CLAIMING THAT THE ROTHSCHILD PLANT'S SHORT-TERM SULFUR DIOXIDE EMISSIONS OF HIGH CONCENTRTATION WERE CAUSING AIR POLLUTION, IN VIOLA- TION OF WISCONSIN SIP RULE NR 154.12(1). ON OCTOBER 17, 1988, WISCONSIN ALSO ISSUED A NOV, CLAIMING THE SAME SUBSTAN TIVE VIOLATION. AFTER SEVERAL DISCUSSIONS WITH STATE AND WEYERHAEUSER, WEYERHAEUSER HAS TENTATIVELY AGREED TO THE INSTALLATION OF THE NECESSARY POLLUTION CONTROL EQUIPMENT TO RESOLVE THE SO2 AIR POLLUTIOIN PROBLEM. REGION V IS PRESENTLY NEGOTIATING A TIME FRAME FOR INSTALLATION OF THIS EQUIPMENT. WEYERHAEUSER HAS EXPRESSED A WILLINGNESS TO ENTER A FEDER- ALLY ENFORCEABLE CONSENT DECREE TO ENSURE CONTINUED COMPLI- ANCE WITH THE WISCONSIN SIP. THERE HAS BEEN NO DISCUSSION REGARDING PENALTIES TO DATE.