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` f k4 K L E I N F E L D E R <br /> of the Western Pacific Railroad, and one boring was advanced south of the processing facility <br /> (GT-4) in an area communicated to Kleinfelder as a newly proposed spray application field. GT- <br /> 1 and GT-2 borings were advanced south of the Western Pacific Railroad. Groundwater was <br /> encountered in one of these four borings, GT-2 at a depth of approximately 20 feet bgs. <br /> The two deep soil borings (TW-1 and TW-2) were advanced near the one million gallon storage <br /> pond and the near the proposed 114 million gallon pond, respectively (Plate 3). The deep soil <br /> borings were drilled (until groundwater was encountered) at a maximum depth of 121 feet bgs in <br /> TW-1, and 26 feet bgs in TW-2. Groundwater rose in TW-1 to approximately 90 feet bgs. <br /> Groundwater was encountered at approximately 13 %2 feet bgs in TW-2 and rose to <br /> approximately 7 feet bgs. <br /> The eleven geotechnical soil borings were advanced in the proposed dam areas of the 84 million <br /> gallon wastewater pond Kleinfelder Report No. 20-4594-04.G01, dated August 14, 2001 (Plate <br /> 4). First encountered subsurface water varied from 3 to 34 feet bgs. The shallowest water was <br /> found in the middle of the intermittent stream the deepest water was detected along the flanks of <br /> the drainage. <br /> Based on review of the subsurface groundwater elevations it appears that most of the shallow <br /> subsurface water generally mimics surface topography in the southwestern parcel of the site <br /> (Section 4). Shallow subsurface water in Section 4 was found primarily near low lying area and <br /> near drainages. Groundwater flow direction in the northeast portion of the site (Section 34) <br /> however did not appear to mimic topography and was calculated to flow towards the northwest. <br /> j Groundwater depths near hilly areas appear to vary greatly and are at depths of 75 feet and <br /> greater below ground surface. <br /> F <br /> The site is generally bisected from the southwest to the northeast by an intermittent stream (the <br /> 84 million gallon pond is located within this stream). Groundwater flow directions may also <br /> significantly flucuate due to groundwater pumping, rainfall, groundwater recharge, etc. <br /> Therefore, changes in groundwater depth, gradient and flow direction may vary at this site with <br /> F time. <br /> i <br /> I` <br /> k <br /> 13498.VvrP2/STO2R534 Page 4 of 13 <br /> Copyright 2002,Kleinfelder,Inc. September 26,2002 <br />