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SECTION 2 SUMMARY 2.1 Project Summary ICF will perform a limited subsurface investigation at the Union Ice Property (Site) located at 425 North Union Street, Stockton, California (Figure 1). The details of ICF Kaiser field activities are identified in the Work Plan dated March 9, 1994, and the Addendum to the Work Plan dated June 9, 1994, and include the following: • Conducting a soil boring investigation including soil sampling at 2 locations using a truck-mounted drill rig with hollow stem augers, • Installation and development of a groundwater monitoring well using a truck- mounted drill rig with hollow stem augers, and • Purge and sampling of three existing groundwater monitor wells as well as newly constructed well. Field activities are scheduled to begin sometime in June, 1994 and are anticipated to last approximately 3 days. There will be one ICF personnel onsite throughout the activities. A list of personnel involved in the field activities is provided in Section 3 of this SSHP. 2.2 Area Description/History The property is located at 425 North Union Street, Stockton, California (Figure 1). The property consists of a storage building, ammonia coolers, ice manufacturing plant, and an asphalt paved drive and stock yard (Figure 2). In September 1989, four underground storage tanks were removed from the Union Ice property under the direction of the San Joaquin County Division of Environmental Health. The tanks included two 10,000-gallon fuel tanks, one 500-gallon fuel oil tank, and one 250- gallon waste oil tank. Results from soil samples collected at the time of tank removals indicated that soil beneath the two smaller tanks had been impacted with petroleum hydrocarbon products. In January of 1990, soil remediation of the two impacted tank sites was performed. A combined total of approximately 550 cubic yard of soil was excavated and removed from the former tank locations. Additional soils and groundwater investigations were carried out from January 1992, to September 1993, and included the installation of four monitor wells and multiple soil borings. Maximum soil concentrations of analytes tested include; xylenes at 16,000 µg/kg, ethyl benzene at 934 µg/kg, and kerosene at 158 mg/kg. Maximum groundwater concentrations of analytes tested include; ethyl benzene at 0.6 µg/L, and xylene at 0.9 pg/L. U@IICESSHT 6.9.9041814001-04 2-1