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i <br /> performed using a PID to detect the potential presence of VOCs in the headspace above the soil <br /> samples selected for field screening <br /> On recovering a sample from the split-spoon system, selected soil samples will be <br /> prepared for transport to the analytical laboratory The ends of the sample sleeves will be covered <br /> with Teflon® end patches and sealed with airtight plastic caps The sample tubes will be labeled <br /> with the project name, project number, boring number, sample depth, the date/time of sampling, <br /> and the sampler's initials The sample tubes will be placed into plastic bags and stored in an <br /> insulated ice chest containing crushed ice for transport to the laboratory Chain-of-custody <br /> documentation will be completed and will accompany the soil samples to the analytical laboratory <br /> Recovered soil samples will be examined for soil classification and will be <br /> described on detailed boring logs in general conformance with the Unified Soil Classification <br /> System, as described in the American Society for Testing and Materials Standard D 2488-90 <br /> • Additional lithologic descriptions, headspace test results, and other drilling information (e g , blow <br /> counts per foot and sample recovery) will be recorded on the boring logs An example of the type j <br /> of boring log that will be used during this investigation is provided m Appendix A <br /> Quality assurance/quality control (QA/QC) samples, duplicate soil samples and <br /> field blanks will also be obtained for laboratory analyses Duplicate soil samples will be <br /> obtained at the rate of 5% of the total soil samples obtained for laboratory analyses Field blanks <br /> will be collected daily <br /> On completion of the drilling, the borings will be backfilled to grade with a <br /> cement-bentonite grout The grout will be placed into the borings using tremie methods All <br /> work will be performed in accordance with SJC-EHD permit requirements and their inspections <br /> • <br /> Preliminary Site Investigation Work Plan-Draft June 30, 1998 <br /> Roberts Property(Fortner Vemalis Pump Station) <br /> Vernalis,California <br /> 10 <br />