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1-2 urethane foam, and fiberglass covered with asbestos board. The roof is wood frame and ply- wood covered with polyurethane and/or fiberglass and an asphalt felt roofing material. Two main structures house the refrigeration facilities. The first and oldest structure houses the Engine Room, Dry Storage Area, and Cold Storage Rooms 1 through 6. Cold Storage Rooms 7 and 8 make up the other main structure. A separate wood-framed structure is uti- lized as an office. Electric heaters are used in this office building and in other limited areas of the plant. Electricity is provided by the Pacific Gas & Electric Company (PG&E). Water is supplied from two wells located on site (Figure 2). These wells are reported to be between 120 and 180 feet in depth. Construction and water levels information have not been provided for these wells. Sewage is disposed in a septic system located on site. The septic system receives waste from each of the bathrooms at the site and a floor drain located in the Engine Room (Figure 2). 1.3 FORMER OPERATIONS _ Prior to TCS, Inc.'s leasing of the facilities, the operation was run by Western Refrigerating and Cold Storage Company (Western). Western operated as a commercial cold storage and ice manufacturing facility. Ice manufacturing was conducted in the present Dry Storage Area (Figure 2). The ice-making process included the use of brine solutions that were chilled by an ammonia refrigeration process. Chilled brine was circulated from a tank to chill water (isolated from the brine in metal trays) to produce ice. The ice manufacturing portion of the business was discontinued in 1982. Prior to or during the dismantling and disposal of the brine tanks, two 45,000-gallon discharges of brine occurred. These discharges occurred in 1982 and permitted the flow of brine to ground surface outside of the plant buildings (Figure 2). :24447 i "REALISTIC SOLUTIONS FOR HAZARDOUS WASTE PROBLEMS"