EPA INSPECTORS FOUND DUST ON THE EXTERIOR LOUVERS AT THE STABILIZATION AND CONTAINMENT BUILDING IN DECEMBER 1998. SAMPLES TAKEN THEN AND LATER, IN AUGUST 1999, FROM THE INTERIOR OF THE SAME VENTILATION LOUVERS INDICATED THE PRE- SENCE OF HEAVY METALS. EPA SUSPECTED RELEASES OF K061 WASTE FROM WITHIN THE BUILDING. EPA ISSUED A RCRA 3007 INFORMATION REQUEST IN JANUARY 2000. A SHOW CAUSE LETTER WS ISSUED IN AUGUST 2000, AND A MEETING WAS HELD WITH RESPONDENT AND EPA ON OCTOBER 4, 2000. RESPONDENT AGREED TO SEEK A CLASS 2 PERMIT MODIFICATION TO THE FEDERAL RCRA PERMIT FOR THE STABILIZATION AND CONTAINMENT BUILDING, AND TO INSTALL SPECIALLY DESIGNED, HIGH EFFICIENCY FILTERS ON THE INTERIOR OF ALL VENTILATION LOUVERS IN THE BUILDING. NO COMPLAINT WAS ISSUED BY EPA. NO PENALTY WAS SOUGHT.