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_ Den Hartog Property Page 5 of 9 <br /> Our Project Number: LGS080514 <br /> May 23, 2008 <br /> i,A.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The site is depicted on the California Geologic Survey Map of the San Francisco-San Jose <br /> Quadrangle as within the Quaternary Modesto Formation. The Quaternary Modesto Formation <br /> (undifferentiated) is unit of undifferentiated alluvial deposits, mainly arkosic, forming the toe of <br /> the Mokelumne alluvial fan, generally covered by 0.3 to 1.0 m of Holocene intertidal deposits <br /> (Plate 5). <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 Guard clay loam, Scribner clay loam and Rioblancho clay loam, <br /> all 0-2% slopes (Plate 6) (USDA, 1992). The table below presents some selected properties of <br /> these soils: <br /> Table 1 <br /> San Joaquin County Soil Survey <br /> Elected Soil Properties of On-Site Soils <br /> Soil Salinity Soil Perme- Septic tank <br /> Name Depth Unified Soil mmhos/ Reaction ability absorption <br /> and Map (in) Classification cm pH (in/hr) fields <br /> Symbol <br /> Guard clay 0-15 Clay loam; CL <2 7.9-8.4 0.2 - 0.6 Severe: <br /> loam, wetness, <br /> drained, 0- 15-72 Clay loam, sandy clay <2 7.9-8.4 .06 - 0.2 percolates <br /> 2% slopes, loam; SC, CL slowly <br /> 169 <br /> 0-16 Clay loam; CL <2 7.4-8.4 0.2 - 0.6 <br /> 16-28 Loam, Clay loam; CL- <2 7.4-8.4 0.2 - 0.6 Severe: <br /> ML, CL cemented <br /> Rioblancho pan, <br /> 226 28-39 Sandy loam, loam, silt <2 7.9-8.4 0.6 - 2.0 percolates <br /> loam; SC-SM, SM, CL- slowly <br /> ML, ML <br /> 39-80 Cemented --- --- --- <br /> Scribner 0-24 Clay loam; CL <2 6.1 - 7.8 0.2 - 0.6 Severe: <br /> clay loam, <br /> partially wetness, <br /> drained, 0 24-60 Stratified loam to silty <2 6.6 8.4 0.2 0.6 percolates <br /> 2% slopes, clay loam; CL slowly <br /> 243. <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 /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02008 Nei!O.Anderson&Associates,Inc <br />