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4 '-- <br /> W <br /> _F <br /> SIERRA <br /> 5,2 Analytic Results for Ground Water <br /> Hydrocarbo,.s as gasoline and diesel. ETIT'X, or organic lead were not detected ill any of <br /> C the.Ground water samples analyzed from wells'IW-1, MW-2 and MW-3. Decal coliform was not <br /> 10 detected in the sample from MW-1. Laboratoti, analytic rarsrtlts for ground water are shown ill <br /> Table 2 (Appendix E3). <br /> CD <br /> G. CONCLUSIONS <br /> r <br /> S,tl)surface work at the site indicates that the site is underlain by at least 24 feet (total <br /> 0 depth explored) of alluvial and colluvial sandy silt and clay. The surface topography in the site <br /> vicinity is nearly flat. The closest surface water is a marsh approximately 1.000 ft west ofthe site. <br /> The elevatiort of the uppermost water bearing zone on May 9. 1991 was measured below <br /> Q- mean sea level with a gradient of 0.0013 ft/ft descending; to thcnortheast. Tile northeasterly <br /> ground water;low direction at the site(which is converse to the topographic gradient)may be the <br /> result of overpumping In wells adjam2eot to or n,*ar the site, <br /> 0 <br /> 0 Hydrocarbons as gasoline and diesel. BTEX or Pb were riot detected in any soil samples <br /> analyzed from borings MW-1. MW-2 and Ih1W-3. <br /> Hydrocarbons as gasoline and diesel. BTI-.,X or organic lead were not detected in any <br /> ground water samples from wells MW-1.MW-2 and MW-3, Fecal coliform was not detected 1n a <br /> sample from MSV-1. <br /> e <br /> (50 <br /> 60 <br /> V <br /> (A Page 8 <br />