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KLEINFELDER <br /> 2 BACKGROUND <br /> ' This report describes Kleinfelder's petroleum hydrocarbon soil assessment of three <br /> underground gasoline storage tanks at the San Joaquin County Hospital at 150 Hospital <br /> Lane in French Camp, California (Plate 1, Site Location Map). The underground tanks are <br /> ' located at two sites (Plate 2, Underground Tank Location Map) <br /> ' Site #1 has a 6,000 gallon underground gasoline storage tank (T1) Although there is no <br /> written record of the tank installation date, it is believed that T1 may have been installed in <br /> the 1940s. Although T1 was reported to contain unleaded gasoline, because of its age, it is <br /> possible that it had contained leaded gasoline at one time. Because T1 recently failed a <br /> precision tank test, San Joaquin County is considering closure of the tank <br /> Site #2 has two 750 gallon underground storage tanks (T2, T3) Tank T2 was originally <br /> ' thought to be the only tank at the site; however, tank T3 was found to be adjacent to 12 <br /> during a geophysical survey The tanks reportedly contained gasoline at one time, but have <br /> not been filled in at least 25 years A recent sounding of one of the tank's contents <br /> indicated that the tank was empty, but the sounding stick smelled of gasoline when <br /> retrieved Tanks 12 and T3 are scheduled for closure to allow for the construction of a <br /> building on the site <br /> San Joaquin County's Department of Capital Projects (SJCDCP) contracted with <br /> Kleinfelder to assess soil in the vicinity of the tanks The purpose of the assessment was to <br /> ' provide SJCDCP with additional information in its evaluation of closure options for the <br /> tanks sites <br /> FR25-91-29 Page 3 of 11 <br /> ' Copyright 1991 Kleinfelder,Inc <br />