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0 • <br /> Quarterly Summary Report <br /> Third Quarter 1995 <br /> Unocal Bulk Plant 0788 <br /> 8203 East 11th Street <br /> Tracy, California <br /> City/County ID #: Unknown <br /> County: San Joaquin, <br /> BACKGROUND <br /> A partially buried 5,000-gallon transmission fluid storage tank was removed on <br /> December 13, 1989, and analysis of soil samples indicated low levels of petroleum <br /> hydrocarbons. The San Joaquin County Public Health Services Department requested <br /> additional investigation on January 30, 1990. Since 1990,,10 groundwater monitoring <br /> wells have been installed to assess soil and groundwater conditions. A Remedial Action <br /> Plan (RAP) recommending soil vapor extraction and air sparging was submitted on <br /> March 18, 1993. A work plan for implementation of the RAP was submitted on July 13, <br /> 1993. The bulk plant was permanently closed and all related activities ceased on <br /> December 1, 1993. The aboveground tanks,loading racks, and garage structure were <br /> removed from the site in September 1994. <br /> RECENT QUARTER ACTIVITIES <br /> Quarterly groundwater monitoring and sampling were performed in August 1995. A <br /> Remedial system design plan was submitted. Pre-field activities and permitting were <br /> initiated for remediation system construction. <br /> NEXT QUARTER ACTIVITIES <br /> Quarterly groundwater monitoring and sampling will be performed and documented. <br /> Upon receipt of well permits, installation of the soil vapor extraction and air sparge wells <br /> will be initiated. <br /> CHARACTERIZATION/REMEDIAL STATUS <br /> Soil contamination delineated? Yes. <br /> Dissolved groundwater delineated? No. <br /> Separate-phase hydrocarbons delineated? Not applicable. <br /> Amount of groundwater contaminant recovered this quarter? None. <br /> Soil remediation in progress? No. <br /> Anticipated start? Soil vapor extraction system start-up during first quarter 1996. <br /> Anticipated completion date? Unknown. <br /> Dissolved/separate-phase hydrocarbons remediation in progress? No. <br /> Anticipated start?.First quarter 1996. <br /> Anticipated completion? Unknown. <br /> CONSULTANT: Pacific Environmental Group, Inc. <br /> 3 10001 1C/3Q95QSR 1 October 13, 1995 <br />