LOUISIANA-PACIFIC IS THE OWNER OPERATOR OF A LUMBER MILL IN MOYIE SPRINGS, IDAHO. ON JUNE 27, 1991, AND DECEMBER 3, 1991 AND EPA INSPECTOR OBSERVED VISIBLE EMISSIONS FROM THE FACILITY IN ORDER TO DETERMINE COMPLIANCE WITH 16 IDAPA SECT. 1-1201. VIOLATIONS WERE DOCUMENTED AS A RESULT OF SUCH OBSERVATIONS. ON OCTOBER 17, 1991 EPA ISSUED REPSONDENT A NOTICE OF VIOLATION (NOV) UNDER SECTION 113(A)(1) OF THE CAA.