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i <br /> GEOMATRIX <br /> After sampling, cement grout was placed in the boreholes from the bottom to the ground <br /> surface via a tremie pipe. Grouting was performed with the approval of a SJC-PHS inspector. <br /> Soil cuttings were stored on-site in labeled 55-gallon steel drums for disposal by <br /> ChevronTexaco. <br /> f 2.3.3 Analytical Methods <br /> ` f <br /> J Soil samples were analyzed for TPHc (C10-C36 carbon range)using U.S. Environmental <br /> i� Protection Agency(EPA)Method 8015 Modified; benzene, toluene, ethylbenzene, and xylene <br /> (BTEX) using EPA Method 802113; and polynuclear aromatic hydrocarbons (PAHs)using EPA <br /> Method 8270 SIM. <br /> Ll <br /> Grab groundwater samples were analyzed for TPHg (C6 to C12 carbon range) and TPHd (Clo to <br /> 7 C25 carbon range) using EPA Method 8015 Modified,BTEX using EPA Method 802113, and <br /> PAHs using EPA Method 8270 SIM. TPHd analyses were performed both with and without a <br /> silica-gel preparation procedure. <br /> The laboratory data sheets and COC records are included in Appendix C. <br /> 2.4 RESULTS OF THE BELLINI PROPERTY INVESTIGATION <br /> The lithology, soil data, and grab groundwater data are discussed in the following three <br /> sections. The analytical results for the soil samples are summarized in Tables 2 and 3 and <br /> shown on Figure 3. Grab groundwater analytical results are summarized in Tables 4 and 5 and <br /> !, J shown on Figure 4. <br /> 2.4.1 Lithology and Hydrogeology <br /> Soil encountered during previous investigations conducted at the site includes deposits of <br /> fine-grained soil(including silts with sand or gravel) with interbedded coarse-grained deposits <br /> (including silty sands and sands). A layer of sandy silt or silt with sand was observed between <br /> about 30 and 45 feet in several borings advanced at the site(Geomatrix, 2002a). A layer of <br /> sandy lean clay from about 65 to 70 feet bgs underlain by clayey sand from about 70 feet to at <br /> least 82 feet bgs was observed in the deepest boring (SB-9) advanced at the site (Geomatrix, <br /> 2002a). <br /> Soil encountered at and downgradient of the Bellini property during the August 2003 <br /> investigation is similar to that of previous investigations. Lean clay was encountered at depths <br /> ._J <br /> I.NPROJECT5000s\5011.00015011-03.dm 8 <br /> d <br />