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June 21, 2000 <br /> Job Number: LGW-173 <br /> Page 5 <br /> forming Mokelumne River alluvial fan. These deposits were mapped by Marchland and Atwater' <br /> for the Lodi area(Plate 6). Alluvial fan deposits of the Modesto Formation are commonly <br /> unconsolidated to semi-consolidated arkosic sediment, often heterogeneous in nature, and were <br /> thought to have been deposited during the Pleistocene glacial outwash episodes in the western <br /> Sierra Nevada Mountains. A small sand dune deposit, probably eolian(wind blown), was mapped <br /> along the eastern property boundary by Marchland and Atwater.° <br /> The surface and near surface soils located on the site are reported to be the Kingdom <br /> Loam and the Tokay Fine Sandy Loam(Plate 7). The Kingdom fine sandy loam and the Jahant <br /> loam soils are similar and described by the Soil Survey report to be generally very deep, well <br /> drained, with a permeability that's moderately rapid in the Kingdom fine sandy loam and moderate <br /> in the Tokay fine sandy loam.' The following is an excerpt of some selected engineering <br /> properties for the following soils. <br /> Table 2. <br /> Selected Soil Properties of the Kingdom Loam and the Tokay Fine Sandy Loam s <br /> Soil Name Depth (in) Unified Salinity Soil Septic tank <br /> and Map Soil mmhos/ Reaction absorption <br /> Symbol Classific- cm pH fields <br /> ation <br /> Kingdom 0-5: Fine sandy loam SM <2 5.6-7.3 Moderate: <br /> loam,0 to 2 5-14:Fine sandy loam, sandy loam SM <2 6.1-7.3 wetness, <br /> percent 14-28: Sandy loam,fine sandy loam. SM <2 6.1-7.3 peres slowly. <br /> slopes, 189 28-42:Fine sandy loam,loam. SC-SM, <2 6.1-7.8 Perm.Mod. <br /> 42-61:Fine sandy loam,sandy loam, SM <2 6.6-8.4 rapid, <br /> coarse sandy loam. <br /> Tokay fine 0-19:Fine sandy loam SM <2 6.1-7.8 Slight limits: <br /> _ sandy loam, 19-45:Fine sandy loam, sandy loam SM <2 6.1-7.8 Perm. is <br /> 0 to 2 percent 45-60:Fine sandy loam, sandy loam, SM <2 6.1-8.4 moderate. <br /> slopes, 256 coarse sandy loam <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> °Marchand,D.E.,and Atwater,B.F., 1979,Preliminary Geologic Map showing Quaternary Deposits of <br /> the Lodi Quadrangle,California. USGS Open File Report 79-933,scale 1:62,500. <br /> ' USDA Soil Conservation Service, Soil Survey of San Joaquin County,California, Sheet 6. <br /> pERJO <br /> i <br /> t• <br />