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n <br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhaslcm pH (in/hr) fields <br /> .Bruella 0-18:. Sandy loam; SC-.SM, SM <2 6.1 - 7.3 2.0 - 6.0 Severe: <br /> sandy loam, .18-31: Sandy clay loam, sandy <2 6.1 - 7.3 0.2 - 0:6 peres slowly <br /> 0-2 % loam; SC <2 6.1 - 7.3 0.2 - 0.6 <br /> slopes, 111 31-67: Sandy clay loam, clay <br /> loam;SC, CL <br /> Bruella 0-8: Sandy loam; SC-SM, SM <2 6.1 - 7.3 2.0 - 6.0 Severe: <br /> sandy loam, 8-42: Sandy loam, sandy clay <2 6.1 - 7.3 0.2 - 0.6 peres slowly <br /> hard loam; SC <2 6.1 - 7.3 0.06 - 0.2 <br /> substratum, 42-60: Sandy clay loam, sandy <br /> 0-2 % clay; SC <br /> slopes, 112 <br /> San Joaquin 0-12: Loam; CL-ML, ML <2 5.6 - 6.5 0.6 - 2.0 Severe: <br /> loam, thick 12-26: Sandy clay loam; SC <2 6.1 - 7.3 0.2 - 0.6 cemented <br /> surface, 0- 26-35: Clay loam, clay; CL <2 6.1 - 7.8 <0.06 pan, peres <br /> 2% slopes, 35-60: Indurated --- --- --- slowly <br /> 240. <br /> Note:The table descriptions do not necessarily reflect site-speck soil properties. <br /> "See description of the map unit for composition and behavior characteristics of the map unit. <br /> / Soil Borings <br /> r/ <br /> On October 21, 2609, LOGE excavated one shallow and one deep soil boring on the <br /> Site (two borings total) for the purpose of conducting a percolation test. The borings <br /> were four inches in diameter and were excavated by hand auger. The shallow boring <br /> was 3.0 feet deep; the deep boring was 6.18 feet deep. The boring locations are <br /> indicated on Plate 2. <br /> The soil in the borings was within the range of what would be anticipated based on the <br /> Soil Survey data reviewed; sandy silt was observed, with cemented conditions present <br /> at subsurface depths. The log for the soil borings is presented in Plate 9. <br /> Discussion of Soil Lithology <br /> Based on the soils observed in the boring, there appears to be moderate potential for <br /> .percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> test results are discussed in the following section. <br /> LOGE0915 Page 5 <br />