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• a <br /> C A M B R I A <br /> Based on the extracted volume and sample analytical results, interim remediation removed <br /> approximately 3 33 pounds of MTBE <br /> Groundwater Monitoring Program• There are currently seven groundwater monitoring wells <br /> located onsite (MW-1 through MW-7), which are sampled quarterly In addition, Cambria <br /> installed three offsite wells (MW-8, MW-9, and MW-10) during July 2003, which have not yet <br /> been sampled During the second quarter 2003 sampling event, MTBE was detected in wells <br /> MW-1 through MW-5, MW-7, P-1, and P-2 at concentrations ranging from 18 to 280,000 ppb <br /> TBA was detected in wells MW-1 through MW-4, MW-7, P-1, and P-2 at concentrations ranging <br /> from 190 to 74,000 ppb No other fuel oxygenates were detected TPHg and BTEX were also <br /> not detected, although some reporting limits were elevated <br /> WORK TASKS <br /> SVE Well Installation <br /> Permits: Cambria will obtain appropriate permits for drilling from SJCEHD <br /> • Site Safety Plan: Cambria will prepare a Site Safety Plan for field work <br /> Utility Clearance Cambria will mark proposed drilling locations and the locations will be <br /> cleared through Underground Service Alert prior to drilling <br /> Site Investigation: Three exploratory soil borings (SVE-1, SVE-2, and SVE-3) are proposed at <br /> the locations shown on Figure 2 The exploratory borings will be drilled using hollow-stem <br /> auger equipment and will be converted to SVE wells All the SVE wells will be located around <br /> the USTs The proposed SVE well locations are intended to target the areas where previous soil <br /> sampling data identified the most highly impacted soils <br /> A Cambria geologist will supervise the drilling and describe encountered soils using the Unified <br /> Soil Classification System and Munsell Soil Color Charts Soil samples from the borings will be <br /> collected at five-foot intervals for soil description, possible chemical analyses, and organic vapor <br /> screening with a photo-ionization detector(PID) Cambria will prepare an exploratory boring log <br /> for each well, and PID measurements will be recorded on the boring logs <br /> Soil samples designated for chemmcal analyses will be retained in stainless steel or brass sample <br /> • tubes The tubes will be covered on both ends with Teflon sheets and plastic end caps Soil <br /> 0955 4 <br />