R.I. BUSSE, INC. OWNS AND OPERATES A ROCK CRUSHING FACILITY AT THE ABOVE ELK GROVE VILLAGE ADDRESS, WHICH IS SUBJECT TO NSPA SUBPART OOO, NONMETALLIC MINERAL PROCESSING. SUB- PART OOO STIPULATES A 15% OPACITY LIMIT ON ROCK CRUSHERS. IN RESPONSE TO A CITIZEN COMPLAINT, THIS SITE WAS INSPECTED ON JULY 23, 1998, AND VIOLATION OF THE 15% OPACITY LIMIT WAS DOCUMENTED AT THE PRIMARY CRUSHER. ON A FOLLOW-UP INSPECTION LON JULY 27, 1998, ANOTHER VIOLATION OF THE 15% OPACITY LIMIT WAS AGAIN DOCUMENTED AT THE PRI(?) CRUSHER. ON SEPTEMBER 1, 1998, U.S. EPA ISSUED A FINDING OF VIOLATION TO R.I. BUSSE, INC.(BUSSE), ELK GROVE VILLAGE, ILLINOIS, FOR VIOLATIONS OF THE FEDERAL NEW SOURCE PERFORMANCE STANDARDS (NSPS) FOR NONMETALLIC MINERAL PROCESSING PLANTS AND THE NSPS GENERAL PROVISIONS. BUSSE EXCEEDED THE NSPS OPACITY LIMITS AT THE PRIMARY ROCK CRUSHER AND FAILED TO OPERATE WATER SPRAYS IN A MANNER ADEQUATE TO CONTROL DUST. OPACITY IS THE AMOUNT OF LIGHT OBSCURED BY PARTICULATES (DUST, SMOKE, ADSH). THE VIOLATIONS WERE DETERMINED BY U.S. EPA INSPECTIONS IN JULY OF 1988. ON DECEMBER 7, 1998, THE U.S. EPA, REGION 5, FILED AN ADMINISTRATIVE PENALTY COMPLAINT, PROPOSING A CIVIL PENALTY IN THE AMOPUNT OF $55,000 AGAINST BUSSE. THE COMPLAINT ALLEGED THAT BUSSE VIOLATED THE NEW SOURCE PERFORMANCE STANDARDS (NSPS) FOR NONMETALLIC MINERAL PROCESSING PLANTS AND THE NSPS GENERAL PROVISIONS. SPECIFI- CALLY, EMISSIONS FROM BUSSE'S PRIMAR