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December 10, 1999 <br /> Job Number: S99308 <br /> Page 6 <br /> Soil Depth(in) Unified Soil Salinity Soil Permeability Septic tank <br /> Name Classification mmhos/cm Reaction in/hr absorption <br /> and Map pH fields <br /> Symbol <br /> Tinnin 0-28:Loamy coarse SM <2 6.6-8.4 6.0-20 Severe: <br /> loamy sand. Poor filter. <br /> coarse 28-53: Loamy SM <2 6.6-8.4 6.0-20 <br /> sand,255 coarse sand, loamy <br /> sand. <br /> 53-75: Loamy SM <2 6.6-8.4 6.0-20 <br /> coarse sand, loamy <br /> sand, sand. <br /> Veritas 0-19: Sandy loam SM <2 7.4-8.4 2.0-6.0 Moderate: <br /> sandy 19-44: Sandy loam, SM flooding, <br /> loam,265 fine sandy loam. <2 7.4-8.4 2.0-6.0 cemented <br /> 44-660: Cemented — — — — pan, <br /> wetness. <br /> Veritas 0-15: Fine sandy SM, SC-SM <2 7.4-8.4 2.0-6.0 Moderate: <br /> fine sandy loam. flooding, <br /> loam,266 15-54: Sandy loam, SM, SC-SM <2 7.4-8.4 2.0-6.0 cemented <br /> fine sandy loam. pan. <br /> 54-70: Cemented — — — — <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> One 10-foot soil boring was drilled on each of the three parcels to characterize the soils. <br /> Ground water was encountered in all three borings between the depths of 5 and 6.6 feet. <br /> Generally, the upper soil layer consists of a dark brown silty sand, sand, or sandy silt to a depth of <br /> about 5 to 6 feet. Below 5 to 6 feet, a dark brown silty sand or sand was observed to a total depth <br /> of 10 feet. No "hard pad'layer was encountered (See Appendix). <br /> One 4 hour percolation test was performed on each of the three parcels (Plate 1). A 4.5- <br /> inch auger hole was drilled and two inches of"pea gravel" was placed in the bottom of each hole. <br /> A 2-inch PVC pipe with slots on the bottom were installed into each of the holes then about 1 to <br /> 2 feet of"pea gravel'was backfilled in the annular space. The tests were conducted in accordance <br /> with the requirements of the San Joaquin Division of Environmental Health. The following table <br /> summaries the results of the three percolation tests: <br /> ?pERSO <br /> f 'L <br /> 1 N <br /> q V <br /> O � <br /> °ssoc. <br /> r <br />