THE SITE COMPRISES A SMALL PORTION OF AN AGRICULTURAL TRACT LEASED BY THE COCOPAH INDIAN TRIBE TO ROBERT L. STANFORD, DBA STANFORD FARMS, FROM 1983 THROUGH 1986. STANFORD FARMS IS A PARTNERSHIP MADE UP OF ROBERT L. STANFORD AND HIS SONS, GREGORY D. STANFORD AND STEVEN H. STANFORD. THE SITE LIES IN THE HEART OF THE RESERVATION'S COMMUNITY CENTER, ADJACENT TO THE TRIBAL HEADQUARTERS AND POLICE STATION. THE SITE WAS USED AS A STORAGE AREA FOR PESTICIDES AND AGRICULTURAL EQUIPMENT WHICH WERE APPARENTLY USED ON THE OTHER PORTIONS OF THE LEASED TRACT. IN EARLY 1987, EPA WAS CONTACTED BY YUMA COUNTY AND ASKED TO ASSIST IN A CLEAN-UP OF THE SITE. FOLLOWING AN INVESTIGATION OF THE SITE BY REGION 9'S AIR AND TOXICS DIVISION'S ( ATD ) PESTICIDES SECTION, THE SITE WAS REFERRED TO EPA'S EMERGENCY RESPONSE SECTION FOR A POTENTIAL CERCLA REMOVAL ACTION. ON MARCH 17, 1987, EPA ASSUMED THE ROLE OF LEAD AGENCY AND INITIATED AN EMERGENCY RESPONSE ACTION. ON NOVEMBER 14, 1987, AFTER DETERMINING THAT THE IN-SITU SOIL TREATMENT WAS SUCCESSFUL AND AFTER TRANSPORTING ALL OF THE CONTAINERS OF HAZARDOUS SUBSTANCES TO A PERMITTED STORAGE FACILITY, EPA'S TEAM AT THE SITE WAS DEMOBILIZED. DURING MARCH - APRIL 1987, THE ON-SCENE COORDINATOR ( OSC ), DANIEL SHANE, MADE REPEATED ATTEMPTS TO CONTACT ROBERT L. STANFORD BUT MR. STANFORD FA