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October 23,2009 Page 4 of 9 <br /> Our Project Number: LGS0090519 <br /> The Site is depicted on the California Geologic Survey Map of the Sacramento Quadrangle as <br /> within the Quaternary Modesto Formation (Qm). This unit consists of Undifferentiated alluvial <br /> deposits, mainly arkosic, forming toe of the Mokelumne alluvial fan, generally covered by 0.3 to <br /> 1.0 meters of Holocene intertidal deposits. (Plate 5, Appendix A). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County <br /> Soil Survey to be composed of Acampo sandy loam (101) with 0-2% slopes, Hollenbeck silty <br /> clay (173) with 0-2% slopes, and Tokay fine sandy loam (256) with 0-2% slopes. (Plate 6, <br /> Appendix A) (USDA, 1992). The table below presents some selected properties of these soils: <br /> - Table 1 <br /> San Joaquin County Soil Survey <br /> Elected Soil Properties of On-Site Soils <br /> Soil Name Depth Salinity Soil Perme- Septic ta <br /> (in) nk <br /> and Map Unified Soil Classification mmhos Reaction ability absorption <br /> Symbol /cm pH (in/hr) fields <br /> 0-19 Sandy loam; SM <2 6.1 - 7.8 2.0 - 6.0 <br /> 19-47 Sandy loam, fine sandy loam, <2 6.6 - 8.4 2.0 - 6.0 <br /> Ac 1coarse sandy loam.; SM Moderate: <br /> 101 01 cemented pan <br /> 47-49 Indurated; --- --- --- <br /> 49-60 Cemented; --- --- --- --- <br /> Hollenbeck 0-10 Silty clay; CH, CL <2 6.6-8.4 0.06-0.2 Severe: peres <br /> silty clay, o-2 10-37 Clay, silty clay; CH, CL <2 6.6-8.4 0.06-02 slowly <br /> % slopes, <br /> 173 37-42 Silty clay loam, clay loam; CL <2 6.6-8.4 0.2-0.6 <br /> 42-60 Cemented --- <br /> Tokay fine 0-19 Fine sandy loam; SM <2 6.1-7.8 2.0-6.0 Slight <br /> sandy loam, 19-45 Fine sandy loam, sandy loam; <2 6.1-7.8 2.0-6.0 <br /> 0-2 % slope SM <br /> 256 45-60 Fine sandy loam, sandy loam <br /> coarse sandy loam; SM <2 6.1-8.4 2.0 6.0 <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 /> A total of 21 soil borings were advanced on the Site, all to an approximate depth varying <br /> between 3.0 and 3.5 feet. The soil borings were used later for percolation test holes; the (� <br /> locations of the borings are indicated in Plate 1. The soil borings were approximately 3.5 feet, <br /> as noted above, and were four (4) inches in diameter. Generally, the soil encountered in the <br /> boring is similar to the soils reported by the San Joaquin County Soil Survey for the area (USDA, <br /> 1992). The table below presents the soil log for the soil boring. <br /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02009 Neil O.Anderson&Associates,Inc <br />