THE FACILITY WAS OPERATED BY E.H. SCHILLING & SON, GENERAL CONTRACTORS, INC. OPEARTION BEGAN IN 1969 AND ENDED IN 1980 THE LANDFILL RECEIVED COMMERCIAL AND INDUSTRIAL WASTES SUCH AS SOLIDS, LIQUIDS AND SLUDGE. - THE USEPA PLACED THE FACILITY ON THE NPL ON 12/30/82, DUE TO POTENTIAL PUBLIC HEALTH RISK OF HAZARDOUS CONSTITUENTS FOUND AT THE SITE. - ON 9/6/85, USEPA ISSUED ARISTECH, DOW, AND E.H. SCHILLING GENERAL NOTICE LETTERS OFFERING AN OPPORTUNITY TO PERFORM RI/FS.