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en vtroso <br /> TPH-g and BTEX have been detected in ground water samples collected from a ground <br /> water monitoring well (N W-8) installed by Exxon near the Shell Service Station SJCPHS <br /> has requested further investigation near Shell's eastern product island to evaluate whether <br /> Shell is impacting ground water quality near MW-8 <br /> Waste Oil Tank <br /> Additional information was requested regarding the waste oil tank This tank was not <br /> replaced in 1990 with the gasoline tanks The June 14, 1990 Aegis Tank Closure Results <br /> Report contains a "Table 1 -Tank Inventory" This table lists a new double-wall fiberglass <br /> waste oil tank, with an age of two years Therefore it had been previously upgraded, and <br /> was not part of this investigation <br /> Files have been requested from Shell to see what data are available from the waste oil tank <br /> replacement Information will be forwarded when received <br /> Technical Rationale for Proposed Scope of Work <br /> * One soil boring is proposed near the eastern dispenser island at the subject site <br /> Soil and ground water samples will be collected from the boring to evaluate whether <br /> Shell is impacting ground water quality near MW-8 <br /> * The well screens for Wells MW-1 through MW-3 have been submerged since <br /> 1995 TPH-g and BTEX had not been detected in ground water samples collected <br /> from these well for several quarters prior to the submersion of the well screens <br /> Three soil borings are proposed near monitoring wells MW-1, MW-2, and MW-3 <br /> Ground water samples will be collected from the borings to evaluate current ground <br /> water conditions near the referenced wells <br /> Work Tasks <br /> Task 1 Permits <br /> Appropriate permits for drilling will be obtained from SJCPHS <br /> Task 2 Health and Safety Plan <br /> A site-specific Health and Safety Plan will be prepared for field work <br /> Task3 Utility Clearance <br /> Proposed drilling locations will be marked and their locations cleared through Underground <br /> Services Alert (USA) prior to drilling <br /> Task 4 Site Investigation <br /> Four exploratory borings are proposed as shown on Plate 3 These borings will be drilled <br /> using Geoprobe drilling techniques These borings will be drilled to first encountered <br /> ground water <br /> 97373 2 <br />