9/15/00: THE SETTLING DEFENDANTS (BP AMOCO PLC, BAYER CORPO RATION, CHEVRON CHEMICAL COMPANY, MONSANTO COMPANY, AND SHEL L OIL CONTRACTED WITH DICO, INC. AND DICO'S PREDECESSOR COMP ANIES TO HAVE HERBICIDES AND PESTICIDES FORMULATED AT DICO'S FACILITY LOCATED AT 200 SOUTHWEST SIXTEENTH STREET, DES MOI NES, POLK COUNTY, IOWA. RELEASES OF HERBICIDES AND PESTICID ES CONTAMINATED A SUBSTANTIAL PORTION OF THE SURFACE AREA OF DICO'S PROPERTY AND SURFACE DRAINAGE AREAS JUST OFF DICO'S PROPERTY. MOST OF THE NECESSARY SITE CLEANUP WORK WITH RESP ECT TO HERBICIDE AND PESTICIDE RELEASES WAS CONDUCTED IN A S ERIES OF REMOVAL ACTIONS WHICH HAVE ALREADY BEEN COMPLETED. THE ONLY REMAINING RESPONSE ACTIONS FOR OPERABLE UNITS 2 AN D 4 ARE LONG-TERM OPERATION AND MAINTENANCE OF ALREADY COMPL ETED REMOVAL ACTIONS AND INSTITUTIONAL CONTROLS. THE OTHER TWO IDENTIFIED POTENTIALLY RESPONSIBLE PARTIES, DI CO, INC. AND ITS PARENT TITAN WHEEL INTERNATIONAL, WHICH OWN AND OPERATE THE SITE, DECLINED TO PARTICIPATE IN THE SETTLE MENT NEGOTIATIONS AND ARE NOT PARTIES TO THE CONSENT DECREE. THE CONSENT DECREE PROVIDES FOR THE SETTLING DEFENDANTS TO P AY INTO THE HAZARDOUS SUBSTANCE SUPERFUND $2,513,808, PLUS I NTEREST FROM THE DATE OF THE LODGING OF THE CONSENT DECREE. THIS AMOUNT REPRESENTS THE SETTLING DEFENDANTS' FAIR SHARE OF ALL PAST AND ESTIMATED FUTURE RESPONSE AND OVERSIGHT COST S FOR OPERABLE UNITS 2 AND 4 (OU2/4) OF THE DES MOINES TCE S ITE (THE SITE). EPA CALCULATED THE