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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 mmhoslcm pH (in/hr) fields <br /> Delhi loamy 0-16 Loamy sand; SM <2 6.1-7.8 6.0-20 Severe: <br /> sand, 0-2% 16-26 Loamy sand, loamy fine <2 6.1-7.8 6.0-20 Poor Filter <br /> slopes, 142 sand; SM <br /> 26-60 Sand, loamy sand, fine <2 6.1-7.8 6.0-20 <br /> sand; SP-SM, SM <br /> Veritas fine 0-15 Fine sandy loam; SM, <4 7.4-8.4 2.0-6.0 Moderate: <br /> sandy loam, SC-SM flooding, <br /> 0-2% 15-54 Sandy loam, fine sandy <4 7.4-8.4 2.0-6.0 cemented <br /> slopes, 266 loam; SM, SC-SM pan <br /> 54-70 Cemented; -- — -- -- <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> See description of the map unit for composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On May 5, 2010, Live Oak excavated one shallow soil boring on the Site for the purpose <br /> of conducting a percolation test. The boring was four inches in diameter, 3.5 feet deep, <br /> and was excavated by hand auger. The boring location is indicated on Plate 2. <br /> The soil in the borings was similar to that described by the Soil Survey; silty sand was <br /> observed from the surface to the maximum depth of the boring (3.5 feet). The log for <br /> the soil boring 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 /> Percolation Test <br /> One shallow percolation test was conducted on the Site; the shallow soil boring <br /> discussed above was used for the percolation test hole (Plate 2). Percolation test <br /> procedures conformed to San Joaquin County Environmental Health Department policy. <br /> LOGE1010 Page 5 <br />