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of soil sampling, the borehole will be backfilled using a sand-cement slurry containing five <br /> L. percent bentonite as described in Appendix B. <br /> Unused soil samples from the boring and rinsate from decontamination of probe equipment will <br /> LA be containerized in U. S. Department of Transportation approved 55-gallon drums. These <br /> drums will be properly sealed and labeled, and will be secured within a fenced area of the <br /> L. Port's property. Recommendations will be provided in the technical report for appropriate <br /> disposal of these drums in a timely manner, based on the findings of this characterization work. <br /> 3.2 LABORATORY TESTING <br /> La The soil and groundwater samples will be submitted under chain-of-custody procedures to BSK <br /> Analytical Laboratories, a California DHS-certified laboratory for PHC analyses. Samples will <br /> �• be analyzed for BTEX, TPHg, and MTBE using EPA methods 8020/8015; and for total lead <br /> using EPA method 200.8. if MTBE is detected in a sample using EPA method 8020, that <br /> sample will be run for oxygenates utilizing EPA method 8260. <br /> Le <br /> 3.3 TECHNICAL REPORT <br /> Upon completion of the field investigation and laboratory testing, a Site Investigation and <br /> Ld Evaluation report will be prepared summarizing results and findings, following Tri-Regional <br /> Board Staff Recommendations (Central Valley Regional Water Quality Control Board, 1991). <br /> The data obtained during this investigation will be evaluated along with the historical data <br /> collected from the site to evaluate the lateral and vertical extent of PHCs beneath the site. <br /> Based on these findings, appropriate actions will be recommended. This report will also <br /> include a figure depicting the site location and existing features, a geologic cross section <br /> depicting PHC-impacted areas and the depth to groundwater, tabulated analytical results, and <br /> copies of all permits obtained for the work. <br /> 3.4 HEALTH AND SAFETY <br /> B&R Health and Safety plan for the subsurface investigation is provided in Appendix E. A <br /> L. copy of this plan will be available on-site during the field work. This plan is not intended for <br /> use by other contractor's personnel involved with this work. <br /> 5 981171S4USTINv.WPN <br /> V <br /> J�Dc BOYAJIAN & ROSS, INC. <br /> ■ Environmental Scienlis[s & Engineers <br /> Y <br />