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WatellSample <br /> The well on the Site is not currently operational; no water sample was collected. A <br /> sample will a collected and analyzed for nitrate and dibromochloropropane (DBCP) �{ <br /> once the well has been repaired. <br /> z err b .�► cc� � � �r � 1�a�fi, ��s/�J <br /> Soil Profileand Geologic Information <br /> The Site is depicted in an area without detailed geologic mapping. Geologic mapping <br /> for the area to the west of the site is titled Geologic Maps of the Sacramento — San <br /> Joaquin Della by Atwater (1983). Based on this map and experience in the area, the <br /> site is located within alluvial deposits of the Pleistocene age upper Modesto Formation <br /> {equivalentAlluvium of the Calaveras River and vicinity, a Holocene and/or upper <br /> Pleistocene tit, per Atwater) (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the USDA Web <br /> Soil Survey to be composed of Jacktone clay, 0 to 2 percent slopes (Plate 8) (USDA, <br /> 2010). The table below 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 Penne- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos�cm pH (inthr) fields <br /> Jacktone 0-22 Clay; CL, CH <2 6.6-8.4 0.0642 Severe: �} <br /> clay, 0-2% cemented CSJ <br /> slopes, 180 22-34 Clay loam, clay silty <2 7.9-9.0 0.06-0.2 pan, peres <br /> clay; CL, CH slowly <br /> 34-37 Indurated --- -- --- <br /> 37-46 Loam, clay loam; CL- <2 7.9-9.0 0.2-0.6 <br /> ML, CL <br /> 46-60 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 October 18, 2010, Live Oak excavated one shallow soil boring on the Site for the <br /> purpose of conducting a percolation test. A second, adjacent boring was excavated on C�2� <br /> October 20 for the purpose of soil logging. The borings were four inches in diameter <br /> and were 3.21 and 9.0 feet deep. The location of the borings is indicated on Plate 2. <br /> The soil in the borings was within the range of what would be anticipated based on the <br /> Soil Survey data reviewed. Clay with fine sand was encountered from the surface to 2.5 <br /> LOGE1025 Page 4 <br />