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hydrocarbons (gasoline) remain in the Site's ground-water plume. Advanced <br />GeoEnvironmental also stated that, "due to the lack of available exposure route to the <br />deeper impacted soil below the site grade and the fine soil type near the upper ten feet <br />of soil section at the site, no direct exposure (soil or soil vapor) is anticipated." The <br />case was issued a "No Further Action" letter by the Central Valley Regional Water <br />Quality Control Board in 2010. More detailed investigation and discussion of the case, <br />remediation, and current conditions are beyond the scope of this report. <br />On-Site Wells <br />No wells are located on the Site; the future development will receive municipal water <br />service. No well permits were identified for the Site from among the files of the San <br />Joaquin County Environmental Health Department. <br />Water Sample <br />No water sample was collected as part of this investigation. <br />Soil Profile and Geologic Information <br />The Site is depicted on the Preliminary geologic map showing Quaternary deposits of <br />the Lodi quadrangle, California (Marchand and Atwater, 1979). The Site is depicted <br />within a map unit of Holocene alluvium, described as "channel, levee, and floodplain <br />deposits; chiefly silt and clay with fine sand along principal drainageways" (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 Sailboat silt loam (Plate 9) (USDA, 2020). The table <br />below 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 Unified Soil <br />(in) Classification <br />Salinity <br />mmhos/cm <br />Soil Perme- Septic tank <br />Reaction ability absorption <br />pH (in/hr) fields <br />Sailboat silt 0-8: Silt loam; CL-ML, ML <2 6.1-7.3 0.6-2.0 Severe: <br />loam, 8-23: Stratified sandy loam to <2 6.6-7.8 0.2-0.6 percs slowly <br />drained, silty clay loam; CL-ML, <br />0-2% CL <br />slopes, 23-61: Stratified sandy clay <2 7.4-8.4 0.2-0.6 <br />234 loam to silty clay loam; <br />CL <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 />LOGE 2130 Page 4