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C A M B R I A <br /> 0 130 parts per million (ppm) xylenes and 1 630 ppm methyl tertiary butyl ether (MTBE) These <br /> results are discussed in Cambna's December 27, 2000 Soil Sampling Report <br /> 2001 Soil Bonngs During October 2001, Cambria advanced two cone penetration test (CPT) <br /> borings (SB-1 and SB-2) near the northwestern dispenser Soil samples collected from SB-1 <br /> contained MTBE at concentrations ranging from. 0 50 to 4 6 ppm at depths from 25 to 60 fbg <br /> MTBE was not detected in soil from SB-2, and 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 /> oSB-1 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 the groundwater analytical results from the October 2001 soil borings, SJCEHD <br /> requested submittal of a work plan for further investigation of the extent of gasoline constituents <br /> in soil and groundwater beneath the site Cambria submitted the requested work plan on <br /> • June 12, 2002, and the results of this work are presented below <br /> INVESTIGATION RESULTS <br /> Personnel Present Cambria geologist Geno Mammini directed the field activities, <br /> working under the supervision of California Registered <br /> Geologist Joe Neely <br /> Permit Permit No 0027031 was obtained from SJCEHD (Appendix A) <br /> Drilling Company Gregg Drilling and Testing, Inc of Martinez, California (C57 <br /> License No 485165) <br /> Drilling Dates September 12, 13, 16, 17, and 20,2002 <br /> Drilling Method. Ten-inch hollow-stem augers <br /> Soil Sampling Methods. Cambria logged soil types from the borings using the Unified <br /> Soil Classification System and Munsell Soil Color Charts Soil <br /> samples were collected at five-foot intervals for soil description, <br /> 0953 2 <br />