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Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br />Soil Name <br />and Map <br />Symbol <br />Depth <br />(in) <br />Unified Soil <br />Classification <br />Salinity <br />mmhos/cm <br />Soil <br />Reaction <br />pH <br />Perme- <br />ability <br />(in/hr) <br />Septic tank <br />absorption <br />fields <br />BrueIla 0-18: Sandy loam; SC-SM, <2 6.1 - 7.3 2.0 - 6.0 Severe: <br />sandy loam, <br />0-2 % <br />slopes, 111 <br />18-31: <br />SM <br />Sandy clay loam, sandy <br />loam; SC <br /><2 6.1 - 7.3 0.2- 0.6 <br />percs slowly <br />31-67: Sandy clay loam, clay <br />loam; SC, CL <br /><2 6.1 - 7.3 0.2 - 0.6 <br />San 0-12: Loam; CL-ML, ML <2 5.6-6.5 0.6-2.0 Severe: <br />Joaquin 12-26: Sandy clay loam; SC <2 6.1-7.3 0.2-0.6 cemented <br />loam, thick 26-35: Clay loam, clay; CL <2 6.1-7.8 <0.06 pan, percs <br />surface, 0- 35-60: Indurated slowly <br />2% slopes <br />240. <br />Note: The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for <br />composition and behavior characteristics of the map unit. <br />Soil Borings <br />On April 1 through 5, 2021, Live Oak excavated shallow borings on each parcel of the <br />Site for the purpose of conducting percolation tests. The borings were four inches in <br />diameter, 3.03 to 3.36 feet deep, and were excavated by hand auger. The borings on <br />Parcels A and B were preliminarily measured to have insufficient percolation rates. As <br />a result, on April 19, 2021, Live Oak observed the drilling of additional percolation test <br />borings on those parcels by Central Valley Septic Services with a Spiradrill LHD 50 <br />drilling rig. The borings were 12 inches in diameter and 3.50 to 19.57 feet deep (Table <br />2). <br />The location of the borings is indicated on Plate 11. <br />The soil in the borings was similar to that described by the Soil Survey. A variety of soil <br />types were encountered, including silts, clays, and sands. The soil logs are presented <br />on Plates 12 through 15. <br />Discussion of Soil Lithology <br />Based on the soil observed in the borings, there appears to be limited potential for <br />percolation in the shallow soil zones, but good potential for percolation in the deeper soil <br />zones at the test locations. Sandy soils generally have a much greater potential for <br />percolation than fine-grained or cemented soils. However, a percolation test is the only <br />accepted method for determining the suitability of the soils for a septic disposal area. <br />Percolation test results are discussed in the following section. <br />LOGE 2062 Page 6