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3.0 SUBSURFACE SOIL AND GROUNDWATER CONDITIONS <br /> 3.1 SOIL LITHOLOGY <br /> Soils encountered during this assessment consisted of silty sand and gravelly, silty sand. The soil <br /> materials were olive in color(5Y 4/2), moist to saturated. Odors were not detected. <br /> 3.2 GROUNDWATER FLOW DIRECTION <br /> Groundwater was encountered at a depth of approximately 12 feet bgs and remained at this depth <br /> during sampling activities. The determination of groundwater flow direction was not part of this <br /> assessment. However, according to PHS-EHD personnel, groundwater is expected to flow to the <br /> north-northeast with a relatively flat gradient. <br /> 3.3 RESULTS OF LABORATORY ANALYSIS <br /> McCampbell Analytical reported that the soil samples submitted for HVOC analysis did not contain <br /> chemicals of concern above the method detection limits of 5.0 micrograms per kilogram (/.cg/kg) <br /> which is approximately parts per billion.However,tetrachloroethylene(PCE)was detected in"grab" <br /> groundwater samples collected from SB-1 and SB-2 at concentrations of 2.9 and 1.2 micrograms per <br /> liter (µg/L), respectively. Other HVOCs were not detected above the method detection limits (0.5 <br /> yg/L) in"grab" groundwater samples collected from SB-1 and SB-2. <br /> Q1Ceres Assoc:z7es 5 Project CA518-2 <br /> 11"F13-C\t0.Quality Cleaners,Tracy,CA June 8, 1999 <br />