Laserfiche WebLink
November 19, 1999 <br /> .lob Number.5993{13.. <br /> Page 5 <br /> VI. GEOLOGY,SOILS,.AND PERCOLATION TEST <br /> The geology of.the site and surrounding area is re orted�t <br /> o <br /> , be the lower member of the <br /> Pleistocene age Modesto Formation consisting of alluvium_ and alluvial fan.deposits made of sand <br /> and finer grained materials. These deposits were mapped by Marshland and Atwatera for the <br /> Lodi'area(Plate 6). These types.of deposits are commonly unconsolidated to semi-consolidated <br /> y .arkosic sediment, often heterogeneous`in nature. This formation vvas deposited during the <br /> Pleistocene glacial outwash.episodes in the westem.-Sierra Nevada Mountains. <br /> - The surface and near surface soils located on theAsite are reported•to be the Tokay fine <br /> sandy loam (Plate 7). The Sari Joaquin soil is described by the Soil Survey report as very deep, <br /> well drained; with a permeability that's moderately rapid:, Typically, the surface layer is grayish <br /> 19 inches th <br /> brown fine sandy loam about ick. The subsoil isgr yr a ish bra 4 <br /> . wn, brown, and pale � <br /> brown fine sandy loam about 26 inches thick. The substratum to a depth of 64 inches is a.pale ► <br /> brown fine sandy loam. The rate of water intake in irrigated areas is 1.5 inches per hour.' The <br /> following is an excerpt of the engineering properties for'the following soil <br /> Selected Soil Properties of the San Joaquin-Urban land Complex a <br /> Soil Name and Depth(in) Unified Soil_ Salinity, Soil <br /> -Septic tank <br /> Map Symbol Classification mmhoslc Reaction absorption <br /> # <br /> In pH fields <br /> 4 <br /> _ Tokay fine sandy: 0-19:Fine sandy loam SM <br /> Y , dY �Y _ <2 6:1-7.8 Slight limits, _ ► <br /> loam,0 to 2 1945:Fine sandy SM <2 6.1-7.8_ permeability is <br /> percent slopes,256 loam; sandy-loam moderately <br /> 4:1) :Fine sandy SM 2 .. 6:1.8.4 rapid,. . . <br /> loam :'sandy loam, <br /> coarse smdv loam- <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> 3 Hell ,E.J.;and Harwood,D.S- 1985 Geologic. eY ood, Map of the I;aie Cenozoic Deposits,oCthe Sacramento <br /> Valley and Northern Sierian Foothills,California_USGS miscellaneous field studies nrap W4790_ <br /> '. a 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 />