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J <br /> Quarterly Summary Report <br /> . First Quarter 1996 <br /> Former Unocal Service Station 2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br /> County STID 4 None <br /> County San Joaquin <br /> BACKGROUND <br /> Underground storage tanks removed in March 1988 From March 1988 through <br /> November 1994, a total of 12 on-site and 3 off-site borings were drilled, 4 on-site <br /> momtonng wells, 3 on-site soil vapor extraction (SVE) wells, and 5 off-site monitoring <br /> wells were installed Analytical results indicate that soil near the eastern dispenser island <br /> contains gasoline hydrocarbons and groundwater has been impacted with gasoline <br /> hydrocarbons A work plan to initiate a 6-month SVE test was submitted on April 14, <br /> 1995 A 30-day public notification for air permitting was initiated, and an air permit to <br /> construct was received in December <br /> RECENT QUARTER ACTIVITIES <br /> Quarterly groundwater monitoring and sampling were performed in February 1996 The <br /> SVE remedial system was constructed in January 1996 Start-up and operation of the <br /> • SVE remedial system was initiated, and a report documenting startup activities of the <br /> groundwater monitoring system was submitted to Unocal in January <br /> NEXT QUARTER ACTIVITIES <br /> Second quarter 1996 groundwater monitoring and sampling will be performed A <br /> remedial performance summary report documenting SVE system performance in the first <br /> quarter 1996 will be submitted <br /> CHARACTERIZATION/R.ENIEDIAL STATUS <br /> Soil contamination delineated? Yes <br /> Dissolved groundwater delineated? Yes <br /> Separate-phase hydrocarbons delineated? Not applicable <br /> Amount of hydrocarbon contaminant recovered this quarter? Approximately 600 lbs <br /> -Soil remediation in progress? Yes <br /> Anticipated start date? January 1996 <br /> Anticipated completion date? Second Quarter 1996 <br /> Dissolved/Separate-phase hydrocarbons remediation in progress? No <br /> Anticipated start? Not applicable <br /> Anticipated completion? Not applicable <br /> Is CONSULTANT Pacific Environmental Group, Inc <br /> 3100405A/1Q96QSR 1 Apnl 18, 1996 <br />