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Section 2 2012 <br /> Site Soil Type <br /> The City of Riverbank's Waste Water Treatment and Disposal Facility is located west of the <br /> Sierra Nevada Foothills and within the Great Valley Geomorphic Province of California, adjacent <br /> to the Stanislaus River. The California Department of Mines and Geology (CDMG) Geologic Map <br /> for the San Francisco-San Jose Quadrangle (1991) indicates that the WWTF overlies the <br /> Quaternary Modesto Formation, which is comprised of arkosic (feldspar rich and generally <br /> derived from the rapid disintegration of granite or granite rocks) alluvium of gravel, sand, silt <br /> and clay. The USDA Natural Resources Conservation Service Soil Survey classifies the <br /> surrounding area as having the soil types: Hollenbeck Clay, Delhi Loamy Sand, and Columbia <br /> Fine Sandy Loam. See Figure 1-2 for the Web Soil Survey. <br /> Figure 1-2: USDA Web Soil Survey. <br /> `rl T <br /> tit <br /> f A'. <br /> t <br /> t it , <br /> h t webso surve .nres.usda. ova WebSoi[Surve .as x <br /> P// Y B / PP/ Y P <br /> 4 City of Riverbank Waste Water Treatment Facility Background Water Quality Monitoring Well Work Plan <br />