1. SECTION 7003 OF THE RESOURCE CONSERVATION AND RECOVERY ACT ( RCRA ) AND SECTION 1431 OF THE SAFE DRINKING WATER ACT ( SDWA ). 2. SPARTON TECHNOLOGY, INC. COORS ROAD FACILITY ALBUQUERQUE, NEW MEXICO 3. SPARTON MANUFACTURED ELECTRONIC COMPONENTS FROM 1961 TO 1994, AND PAST WASTE MANAGEMENT PRACTICES PRODUCED A CON- TAMINANT PLUME IN THE GROUND WATER CONTAINING SOLVENTS SUCH AS TRICHLOROETHYLENE (TCE). THE LEADING EDGE OF THIS CONTAMINANT PLUME IS APPROXIMATELY 1/2 MILE BEYOND THE FACILITY BOUNDARY. CONCENTRATIONS OF TCE IN THE GROUND WATER ARE AS HIGH AS 7.6 PARTS PER MILLION (PPM), WHICH IS OVER 1000 TIMES THE MAXIMUM CONTAMINANT LEVEL OF 0.005 PPM FOR DRINKING WATER UNDER THE SDWA. GROUND WATER IS THE SOLE SOURCE OF DRINKING WATER FOR THE CITY OF ALBU- QUERQUE, AND A PUBLIC WATER SUPPLY WELL IS APPROXIMATELY 2 MILES DOWNGRADIENT FROM THE LEADING EDGE OF THE CON- TAMINANT PLUME. SPARTON HAS BEEN INVESTIGATING AND EVALUATING REMEDY AL- TERNATIVES UNDER A RCRA SECTION 3008(H) ADMINISTRATIVE ORDER ON CONSENT (AOC) SIGNED WITH EPA ON OCT. 1, 1988. AS PART OF THIS PROCESS, EPA PREPARED A STATEMENT OF BASIS SUMMARIZING THE SITE HISTORY AND THE VARIOUS CLEAN- UP ALTERNATIVES TO ADDRESS GROUND