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i - -. ------------- <br /> ----------- -------------- <br /> _ _ ._____________ <br /> I <br /> t. <br /> Soil samples from the waste oil lank area were needed to prove to San <br /> Joaquin Coun.y that the waste al tarp <br /> had not leaked. Since the waste oil tank <br /> had been removed and <br /> the excavation backFi Iled, a new <br /> excavation wag dug in <br /> order to take certified soil samples. This initial excavation was six feet long by <br /> three feet wide and was eight feet deep: the depth was measured from the <br /> original surface level to insure that samples would be taken from below the tank. <br /> A sample was taken from the sidewall near the WHOM of the excavation, and <br /> laboratory analysisshowe(' -he sample to be contaminated. <br /> The waste oil tank area was then excavated to a I,, er extent in an attempi to <br /> remove the contaminated soil This new excavation was eight feet long by eight <br /> feet wide and was at a depth of nine to nine and a halt feet deep below the <br /> I r roxirnat®! seven feet below existing surface level). <br /> original surface leve ,app y <br /> Four sal samples were taken, one from each sidewall, fron a depth as near the <br /> bottom as possible. These soil samples were taken under the supervision of a <br /> San Joaquin County inspector from the Office of Environmental Health. All of <br /> these samples showed <br /> non-detectable contamination levels from analysis by <br /> Eureka Laboratory. <br /> Iss excavation <br /> was bac <br /> k filled with clean <br /> ea gravel, an <br /> <= = 1h®spoiled snit removed was manifested to an authorized dump. <br /> _ w�. <br />