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F., <br /> F. <br /> Sutter Homes Winery <br /> ry <br /> ` Page No. 5 <br /> The high levels of Nitrate found to four borings range between 53 and 170 m g/L nitrate <br /> as NO3 ranging from 1.1 to 3.8 times higher then the 45 mg/L nitrate as NO3 is the maximum <br /> contaminate level MCL standard. The.high levels of nitrate found in the shallow ground water <br /> most likely originated from prior beef cattle, sheep, and farming uses of the site and other nearby <br /> dairy uses of the land. <br /> VI. SOIL PROFILE AND PERCOLATION TEST <br /> F The geology of the area is reported to be Pleistocene Modesto Formation'�Z(Plate 7). <br /> The Modesto Formation is composed of compact.silt and very fine sand. In the Central Valley, <br /> these deposits are estimated to be as much as 100-feet thick and because of their fine-grained <br /> nature would not yield much water to well and would impede the vertical movement of water.Z <br /> r The soils located on the site are reported to be the Devries and Guard Soils (Plate 8). The <br /> # ! . following is an excerpt of the engineering properties of the following soils.' <br /> Selected Properties from the Soil Survey of San Joaquin County, California <br /> J Soil Name Depth (in) Unified Soil Salinity Soil Reaction Septic tank <br /> F and Map Classification mmhos/cm pH absorption fields <br /> Symbol <br /> Devries, 0-13 Sandy loam SM <2 6.6-8.4 Severe:-cemented <br /> 149 13-28 Sandy loam, SM <2 6.6-8.4 pan. <br /> line sandy loam <br /> 28-80 Indurated --- --- --- <br /> Guard, 169 0-15 Clay loam CL <2 7.9-8.4 Severe: cemented <br /> l 15-72 Clay loam, SC,CL <2 7.9-8.4 pan,peres slowly. <br /> sandy clay loam <br /> Note: The table descriptions do not necessarily reflect the site-specific conditions encountered. <br /> FAtwater, B.F., 1982,Geologic maps of the Sacramento-San Joaquin Delta, California,United States <br /> Geologic Survey map MF-1401. <br /> z Page, R.W., 1986,Geology of the Fresh Ground-Water Basin of the Central Valley,California,with <br /> Texture Maps and Sections, USGS Prof. Paper 1401-C. <br /> 3 USDA Soil Conservation Service, Soil Survey of San Joaquin County,California, sheet 5. <br /> a ,UR so <br /> a N <br /> x � <br /> Ft <br /> o 4I10c" <br /> A <br />