ON DECEMBER 17, 2002, EPA SENT A REFERRAL TO THE DEPARTMENT OF JUSTICE REQUESTING THE FILING OF A PROOF OF CLAIM IN THE CHAPTER 11 BANKRUPTCY PROCEEDINGS FOR KAISER ALUMINUM & CHEMICAL CORPORATION ( KAISER ). KAISER IS A POTENTIALLY RESPONSIBLE PARTY AT OPERABLE UNIT TWO OF THE PETERSON PURITAN INC SUPERFUND SITE (THE SITE ) IN CUMBERLAND, RI. OPERABLE UNIT TWO OF THE SITE WAS FORMERLY USED FOR DISPOSAL OF WASTES CONTAINING HAZARDOUS SUBSTANCES FROM 1954 TO 1986. WITHIN THIS PERIOD OF TIME, THE PROPERTY WAS PRIMARILY USED AS A PRIVATELY-OWNED, MIXED MUNICIPAL AND INDUSTRIAL LANDFILL. EPA HAS EVIDENCE THAT KAISER GENERATED HAZARDOUS SUBSTANCES THAT WERE SHIPPED TO THE SITE DURING THE PERIOD IN WHICH THE LANDFILL WAS IN OPERATION.