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CAMBRIA <br /> During February 1996, Enviros, Inc drilled ten soil borings (SB-1 through SB-]0) m the <br /> vicinity of the UST complex and the dispenser islands TPHg was detected in three of the <br /> borings at concentrations ranging from less than 1 0 to 770 ppm Benzene was detected in <br /> one boring at concentrations ranging from 0 0082 to 0 026 ppm Methyl tertiary butyl <br /> ether (MTBE) was detected in four of the borings at concentrations ranging frorn less than <br /> 0 025 to 15 ppm This investigation is detailed in Enviros' May 21, 1996 Soil Boring <br /> Installation Report <br /> The results of the current investigation are presented below <br /> INVESTIGATION RESULTS <br /> Personnel Present Project Engineer Robert Perlowski directed the field sampling, <br /> working under the supervision of California Registered <br /> Geologist Joe Neely <br /> Permits Cambria obtained a well construction permit 4020387, from <br /> the SJCPHS/EDH (Appendix A) <br /> Drilling Company Gregg Drilling of Martinez, California (C57 License 4485165) <br /> Drilling Date September 15, 1999 <br /> Drilling Method Hollow-stem auger drilling equipment <br /> Sampling Methods Soil Iithology was logged using the Unified Soil Classification <br /> System and the Munsell Soil Color Charts Encountered <br /> hthology is described on the exploratory boring log presented <br /> in Appendix B Soil samples were collected at five foot <br /> intervals and/or significant lithologic changes for lithologic <br /> description, potential chemical analysis, and head-space <br /> analysis <br /> Number of Borings One soil boring was drilled and converted into a groundwater <br /> monitoring well (MW-1) The location of the well is shown <br /> on Figure 2 <br /> Boring Depth 75 5 fhg <br /> 241-1359 2 <br />