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APPENDIX II <br /> CONFIRMATORY SOIL AND WATER SAMPLES <br /> The type and number of samples to be collected will depend on whether or not water is <br /> present in the excavation, and whether obviously contaminated areas are detected in locations <br /> other than those proposed. <br /> If water is not present in the tank excavation, only soil samples will be collected. Samples <br /> will be collected from beneath the base of the excavation a maximum of 3 feet into the <br /> underlying soil. Two soil samples will be collected, one at each end of each tank as it was <br /> formerly positioned in the excavation. One soil sample will also be collected beneath every <br /> 20 feet of UST related pipes removed. <br /> If water is present in the tank excavation, both soil and water samples will be collected as <br /> described previously, except that they will be collected from the excavation wall at the <br /> soil/groundwater interface at each end of the tank. A single water sample will be collected <br /> from the excavation. Before sampling, the presence of floating product will be determined. <br /> The excavation will be carefully purged of all standing water by pumping and allowed to <br /> refill before sample collection. All purged water will be stored separately onsite pending the <br /> receipt of analytical results which will indicate final disposition: either transport and disposal <br /> as a hazardous waste, or disposal into the storm drain system. If the purge water is <br /> determined ti be a hazardous waste, it will be transported by a State of California licensed <br /> hazardous waste hauler under hazardous waste manifest to a TSD facility for disposal. <br /> Soil samples will be collected in 3- to 6-inch long brass liners using a drive-tube type sampler <br /> which will be driven into the ground using a rubber mallet. The sampler will be <br /> page 16 <br />