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San Joaquin County <br /> 2 26 October 1995 <br /> 851 East Lodi Avenue <br /> contamination remaining and the July 1993 soil boring, Geological Technics estimated that approximately <br /> 22 pounds(3.6 gallons) of diesel range petroleum hydrocarbons are remaining in a 12'x 22'x 5' volume <br /> at approximately 30 feet bgs. Remaining volumes of other toluene, ethylbenzene, and xylenes were not <br /> estimated. <br /> i <br /> Based on the presence of a silt layer located between 25to 30 feet bgs and a highest depth to ground <br /> water of approximately 40 feet bgs (taken from San Joaquin Flood Control and Water Conservation <br /> District Spring 1989 Semi-Annual Groundwater Report), which leaves a buffer of about 10-15 feet i <br /> between ground water and the remaining contaminated soils, Geological Technics and the San Joaquin <br /> County Department of Environmental Health(County) believe no further investigation or remediation is <br /> necessary. In a letter dated 6 June 1995, the County closed the site. <br /> WEG , <br />` Staff s w <br /> concurith Geological Technics conclusions and:the County's recommendation for no further <br /> action. <br /> SDJ <br />