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CAMBRIA <br /> number of tanks (5 total) listed by the MFD does not agree with the number of tanks (4 total) <br /> shown on the site map prepared by Geologic Technics, Inc (GTI) <br /> 2001 Site Investigation GTI performed a Geoprobe investigation on the western portion of the <br /> former service station property on August 16, 2001 GTI advanced four Geoprobe borings (GP-1 <br /> through GP-4) and collected soil and groundwater samples from the borings Total petroleum <br /> hydrocarbons as gasoline (TPHg) and benzene, toluene, ethylbenzene, and xylenes (BTEX), and <br /> methyl tertiary butyl ether (MTBE) were not detected in soil samples collected from borings <br /> GP-2, GP-3, or GPI �TPHg was detected in soil from GP-1 at a concentration of 154 P per <br /> er <br /> a}moi j -fz►1�million (ppm) No benzene or MTBE were detected in the soil sample from GP-1 <br /> was dei e�d_ at► so ivas <br /> Based on the soil and groundwater analytical results from the GTI investigation, SJCEHD Vin <br /> requested that Shell investigate the extent of gasoline constituents m soil and groundwater 3�uS <br /> beneath the site Wayne Perry, Inc (WPI) submitted a work plan for this investigation on <br /> February 7, 2003 Shell subsequently assigned this case to Cambria, and Cambria performed the <br /> investigation outlined in the WPI work plan The locations of the wells and borings were altered <br /> slightly from the work plan due to encroachment issues and property access issues <br /> • INVESTIGATION RESULTS <br /> Personnel Present: Cambria geologist Anne Wettstone directed the field activities, <br /> working under the supervision of California Registered <br /> Geologist Joe Neely Ym7,/ a/Gy <br /> Permits: Cambria obtained permits INNo 0036007 and 0037782 from <br /> SJCEHD (Appendix A) <br /> Drilling Company: Gregg Drilling and Testing, Inc of Martinez, California <br /> (C57 License Nos 485165) <br /> Drilling Dates September 4& 5, 2003, and May 24& 25, 2004 ' <br /> Drilling Method• Geoprobe and 8-inch hollow-stem auger(HSA) <br /> Number of Borings Five HSA bonngs were drilled and converted into groundwater <br /> monitoring wells (MW-1 through MW-5) Seven soil borings <br /> . (B-1 though B-7) were advanced using Geoprobe direct push <br /> 1660 2 <br />