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CAMBRIA <br /> During October 2001, Cambria advanced two cone penetration test (CPT) borings (SB-1 and <br /> SB-2) near the northwestern dispenser Soil samples collected from SB-1 contained MTBE at <br /> concentrations ranging from 0 50 to 4 6 ppm No total petroleum hydrocarbons as gasoline <br /> (TPHg), benzene, toluene, ethylbenzene, xylenes (BTEX), or fuel oxygenates other than MTBE <br /> were detected in soil from either boring One groundwater sample was collected from boring <br /> SB-2 and it contained 48,000 parts per billion (ppb) MTBE and 220 ppb tertiary amyl methyl <br /> ether(TAME) No TPHg, BTEX, or fuel oxygenates other than MTBE or TAME were detected <br /> in the groundwater sample Results from this investigation are summarized in Cambria's <br /> December 4,2001 Site Investigation Report <br /> Based on these analytical results, SJCPHS/EHD requested further assessment of impact to soil <br /> and groundwater beneath the site <br /> Technical Rationale for Proposed Scope of Work <br /> • MTBE and TAME have been detected in groundwater, and MTBE has been detected in <br /> soil beneath the site <br /> • A survey to identify water supply wells within 2,000 feet of the site has not been <br /> completed <br /> • Cambria proposes to install five groundwater monitoring wells to determine the vertical <br /> and lateral extent of petroleum hydrocarbons and fuel oxygenates in soil and <br /> groundwater beneath the site <br /> • Cambria proposes to conduct a sensitive receptor survey to identify water supply wells <br /> and surface water bodies within a 2,000-foot'radius of the site' <br /> Work Tasks <br /> Permits. Cambria will obtain a drilling permit from SJCPHS/EHD <br /> Site Safety Plan Cambria will prepare a Site SafetyPlanfor fieldwork <br /> Utility Clearance. Cambria will mark proposed drilling locations and will clear the locations <br /> through Underground Service Alert prior to drilling <br /> 0953 2 <br />