Laserfiche WebLink
August 26,2002 <br /> ` Job Number:LG02-286 <br /> Page 6 <br /> VI. GEOLOGY, SOILS,AND PERCOLATION TEST <br /> The surface geology at the site is shown on Marchand's and Bartow's map and is <br /> composed of Pleistocene Upper Member Modesto Formation consisting of sand with minor <br /> gravel and silts(Plate 6). <br /> The surface and near surface soils located at the site are reported to be the Tokay fine <br /> sandy loam(no. 256) (Plate 7)6. An excerpt from the San Joaquin Soil Survey describes the <br /> Tokay fine sandy loam as the following: "This very deep, well drained, nearly level soil is on <br /> low fan terraces.Typically,the surface layer is grayish brown fine sandy loam about 19 inches <br /> thick. The subsoil is grayish brown, brown, and pale brown fine sandy loam about 26 inches <br /> thick. The substratum to a depth of 60 inches is pale brown fine sandy loam. Permeability is <br /> moderately rapid in the Tokay soil." Table 4 presents some selected properties of the Tokay fine <br /> sandy loam. <br /> ` Table 4. <br /> Selected Soil Properties of the Tokay fine sandy loam. <br /> San Joaquin County Soil Survey Report.' <br /> Soil Name and Map Depth(in) Unified Soil Salinity Soil Septic tank <br /> .w Symbol Classification mmhos/cm Reaction absorption <br /> PH fields <br /> Tokay fine sandy 0-19:Fine sandy loam. SM <2 6.1-7.8 Slight. <br /> loam,0 to 2%slopes, 1945:Fine sandy SM <2 6.1-7.8 <br /> 256. - loam,sandy loam. <br /> 45-60:Fine sandy SM <2 6.1-8.4 <br /> loam,sandy loam, <br /> coarse sandy loam. <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> On August 1, 2002, one(1) 3.0 foot boring was drilled in the proposed septic field area of <br /> the Phase II construction. Plate 1 identifies the locations where the soil borings and percolation <br /> s Atwater,B.F., 1982,Geologic Maps of the Sacramento-San Joaquin Delta,California:U.S.Geologic <br /> Survey Miscellaneous Field Survey Map MF-1401,21 Sheets,Scale 1:24,000. <br /> 6 USDA Soil Conservation Service,Soil Survey of San Joaquin County,California, Sheet 18. <br /> 4 <br /> 'w <br /> i <br /> O <br /> �SSOG\ <br />