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�r <br /> July 21,2003 <br /> Job Number:LG03-120 <br /> Page 6 <br /> Table 4. <br /> Selected Soil Properties of Surrounding Soils <br /> San Joaquin County Soil Survey Report." <br /> Soil Name and Map Depth(in) Unified Soil Salinity Soil Septic tank <br /> Symbol Classification mmhos/cm Reaction absorption <br /> pH fields <br /> — Honcut sandy loam, 0-21: Sandy loam SM <2 6.1 -7.3 Slight. <br /> 0 to 2 percent slopes, 21-60: Coarse sandy SM <2 6.1 -7.8 <br /> 175. loam,sandy loam <br /> Veritas fine sandy 0-15:Fine sandy loam SM,SC-SM <4 7.4-8.4 Moderate: <br /> loam,0 to 2 percent 15-54: Sandy loam, SM,SC-SM <4 7.4-8.4 flooding, <br /> slopes,266. fine sandy loam. cemented pan. <br /> 54-70:Cemented --- — <br /> Note: The table descriptions do not necessarily r fleet site-specific soil properties. 74104's y W C 4 5 R 4 eP* <br /> 4d j Q S&/l O•rrlhl <br /> Six (6) 3-foot deep soil borings were drilled on each of the proposed parcels to characterize the <br /> shallow subsurface conditions. The soil encountered to a depth of 3 feet on the site was <br /> composed of sand with some silt and is similar to the descriptions of the shallow soil in the San <br /> Joaquin Soil Survey. Six shallow percolation tests were completed within the 3-foot deep boring <br /> to measure the percolation rate of the soil. Plate 1 identifies the location of the soil borings and <br /> percolation tests. <br /> The percolation test borings were drilled utilizing a 4-inch hand auger drill. The casing used for <br /> the percolation test was 1-1/2-inch diameter PVC pipe with an open end on the top and bottom. <br /> Perforations were made on approximately the last 6 inches of the casing. One (1) inch of"pea <br /> gravel"was placed in the bottom of the hole,the casing was installed, and two (2) feet of"pea <br /> gravel'was backfilled in the annular space. The percolation test borings were pre-soaked on <br /> June 12,2003, 24-hours prior to the test. <br /> Six one (1) hour percolation tests were conducted on June 13, 2003, one on each of the six new <br /> parcels. The percolation tests were conducted in accordance with the requirements of EHD. The <br /> last ten minutes of each percolation test was observed by Linda Turkatte, Environmental Health <br /> Specialist of the EHD. The following table presents a summary of the percolation tests. <br /> _ �pE RSOt <br /> Z <br /> O � <br /> ISSO�♦ <br />