40/01/01: RI/FS OF OPERABLE UNIT 3 (GROUNDWATER). THIS CASE REQUIRES RESPONDENTS TO PERFORM AN RI/FS FOR THE OPERABLE UNIT (#3) OF THE SITE. RESPONDENTS WILL PAY OVERSIGHT AND CERTAIN COSTS INCURRED IN NEGOTIATING THE AOC (ABOUT $40,000). THERE ARE 22 SETTLORS.