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Y S. <br /> ; - <br /> - T FMo <br /> KEI-P88-0810-1 <br /> December 9, 1988 <br /> Page 3 <br /> HYDROLOGY AND GEOLOGY <br /> Ground water is present at the site at depths ranging from 11 to <br /> 12 feet below the surface. <br /> The subsurfacefo <br /> of about rmations at the site consist <br /> explored. of clay to a depth <br /> 10 feet, followed by silt t;, sand to the total death . <br /> LIMITATTONs <br /> Soil deposits and rock formations <br /> lithology, saturation, strength and other vary in thickness, <br /> site. In addition, environmental chap esraperties across any <br /> occurring or artificially-kndu�ed may g , either naturally- <br /> water levels and flaw paths ► y cause changes in ground <br /> concentration of an thereby changing the extent and <br /> field and laboratory <br /> Contaminants, Our studies assume that the <br /> site. as a whole, anda data <br /> that reasonablyare subsurface epsentative of the <br /> reasonably conducive to interpolation and extrapolation. <br /> conditions are <br /> The results of this study are based on the data obtained from th <br /> field and laboratory investigations. We have analyzed this e <br /> using what we believe to be currentlydata <br /> techniques and principles in the Northern California region. Wne <br /> make no warranty, either expressed or implied, except that our <br /> services have been performed in accordancewith <br /> generally <br /> accepted professional. principles <br /> work. and practices existingrsbc <br />