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i <br /> Ms. Diane Hinson -2- 17 May 1989 <br /> 3. Soil samples are to be collected at every 5-foot interval and change in <br /> lithology to document the vertical variation in lithology as well as <br /> hydrocarbon contamination in the soil . A sufficient number of samples <br /> are to be submitted for laboratory analysis to show the extent and <br /> variations in hydrocarbon concentrations in the soil . Those not sent <br /> for analysis are to be frozen and retained for potential analysis. <br /> 1f you have any questions, please call me at (916) 361-5725. <br /> EDWARD W. JAME- <br /> Engineering Geologist <br /> EWJ:ew j <br /> Z <br />