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<br />LOGE 2211 Page 4 <br /> <br />the MCL at 0.2 parts per billion (ppb, equivalent to µg/L) because it believes that given <br />present technology and resources, this is the lowest level to which water systems can <br />reasonably be required to remove this contaminant should it occur in drinking water. <br />The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. <br />On-Site Wells <br />No wells are located on the Site. No well permits were identified for the Site from <br />among the files of the San Joaquin County Environmental Health Department. <br />Water Sample <br />Because no wells are located on the Site, no water sample was collected as part of this <br />investigation. <br />Soil Profile and Geologic Information <br />The Site is depicted on the Preliminary geologic map of Cenozoic deposits of the <br />Bellota quadrangle, California (Marchand and Bartow, 1979). The Site is depicted <br />within a map unit of the Modesto formation upper member described as “foothill-derived <br />alluvial silt, clay, and minor sand forming terraces, upper fans, and following <br />distributaries across lower fans; abundant volcanic detritus” (Plate 8). <br />The surface and near surface soils located at the Site are reported by the USDA Web <br />Soil Survey to be composed of Galt clay (Plate 9) (USDA, 2022). The table below <br />presents some selected properties of this soil: <br />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 />Galt clay, <br />0-2% <br />slopes, 160 <br /> <br />0-25 <br />25-34 <br />34-60 <br />Clay; CL, CH <br />Clay, silty clay; CL, CH <br />Cemented <br /><2 <br /><2 <br />--- <br />6.6-7.3 <br />6.6-8.4 <br />--- <br />0.06-0.2 <br />0.06-0.2 <br />--- <br />Severe: <br />cemented <br />pan, percs <br />slowly. <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 /> <br />Soil Boring <br />On April 6, 2022, Live Oak excavated a shallow soil boring located between the <br />proposed septic disposal areas of the two parcels for the purpose of conducting a <br />percolation test. The boring was four inches in diameter, 2.51 feet deep, and was <br />excavated by hand auger (Table 2).