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' I INC <br /> APPENDIX III <br /> ' EXPLORATORY EXCAVATION AND SOIL BORING SAMPLING PROTOCOL <br /> ' 1.0 EXPLORATORY EXCAVATION PROCEDURES <br /> The lateral and vertical extent of soil hydrocarbon contamination at the subject property <br /> ' will be determined by surface excavation procedure to attempt clean closure The area <br /> to be excavated will be immediately around the location of the existing above ground <br /> ' storage tank The excavation plan will provide for a pat extending vertically downward <br /> from the area of maximum surface contamination. Equipment will be able to excavate <br /> ' material to a maximum depth of approximately 30 feet, if necessary <br /> ' A California State Certified Engineering Geologist will supervise excavating operations <br /> He will review and supervise the separating and stockpiling of the clean and <br /> contaminated soil, make onsite changes in excavation geometry, and record encountered <br /> geologic and hydrocarbon contamination conditions as observed in the field Excavation <br /> ' of contaminated soil will continue until soil that is believed to be uncontaminated is <br /> reached both vertically and laterally along the sides and bottom of the pit Sod samples <br /> ' will be obtained along the walls and floor of the excavation laterally every 50 feet or as <br /> appropriate and will be analyzed for specific constituents as outlined in the workplan <br /> ' The excavation process will continue until non-detect soil contamination levels are <br /> reached for all walls and floors of the pit Appropriate fencing material will be placed <br /> ' around the excavation to prevent unauthorized entry After regulatory approval the <br /> excavation will be backfilled <br /> 1 <br /> ' APPENDIX III <br /> 08220010 005 1 <br /> 1 <br />