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On-Site Wells <br /> One domestic well is currently located on the Site. No power is connected to the well at <br /> this time, according to Mr. De Casas. <br /> Two well documents were identified for the Site from among the files of the San Joaquin <br /> County Environmental Health Department: <br /> • April 2017 well consultation report for placement of domestic well. <br /> • June 2017 well completion report. The report indicates a total depth of 280 feet <br /> and a static water level of 88 feet. <br /> These documents have been included in Appendix 4 of this report. <br /> Water Sample <br /> The well on the Site is not connected to a power supply. No water sample was <br /> collected. <br /> Soil Profile and Geologic Information <br /> The Site is mapped on the Preliminary geologic map of Cenozoic deposits of the Bellota <br /> quadrangle, California (Marchand, D.E., and Bartow, J.A., 1979). It is depicted within a <br /> map unit of the Modesto formation upper member, defined as "foothill-derived alluvial <br /> silt, clay and minor sand forming terraces, upper fans, and following distributaries <br /> across lower fans; abundant volcanic detritus" (Plate 10). <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 11) (USDA, 2020). 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 Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm pH (in/hr) fields <br /> Galt clay, 0- 0-25 Clay; CL, CH <2 6.6-7.3 0.06-0.2 Severe: <br /> 2% slopes, cemented <br /> 160 25-34 Clay, silty clay; CL, CH <2 6.6-8.4 0.06-0.2 pan, peres <br /> slowly. <br /> 34-60 Cemented --- --- --- <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 20-10 Page 4 <br />