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Soil Suitability/ Nitrate Loading Study <br /> Ripon Winery Proposed Warehouse ■ Ripon, CA 1 rerracon <br /> January 20, 2017 ■ Terracon Project No. NAI 67059 <br /> Table 4. <br /> Summary of Soil Lithology. <br /> Boring Depth Interval (ft) Soil Type Unified Soil <br /> Classification <br /> P1 0.0 to 3.0 Silty sand, fine to SM <br /> medium grained, brown <br /> P2 0.0 to 3.0 Silty sand, fine to SM <br /> medium grained, brown <br /> 0.0 to 8.0 Silty sand,fine to SM <br /> B1 medium grained, brown <br /> 8.0 to 10.0 Lean clay, gray CL <br /> 0.0 to 8.0 Silty sand,fine to SM <br /> B2 medium grained, brown <br /> 8.0 to 10.0 Lean clay, gray CL <br /> 1.5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow soils from the test hole points to favorable conditions for septic <br /> disposal areas due to the porosity of the the sandy soils. These characteristics allow good <br /> seepage or percolation. Generally speaking, coarse-grained soil has a greater potential for <br /> percolation than fine-grained or cemented soil. <br /> Even though the near surface soils are sandy, the area is known to have patches of clay strata <br /> with depth as well as "hardpan" or cemented soils which have low porosity. For this reason, <br /> seepage pits are used with leach lines in various areas of the county. <br /> 1.6 Percolation Test Information <br /> 1.6.1 Percolation Test Locations <br /> Refer to Section 1.5.1 and Appendix A, Exhibit 2. <br /> 1.6.2 Number of Percolation Tests i <br /> Two shallow percolation tests were conducted. <br /> 1.6.3 Boring Preparation and Presaturation <br /> Responsive ■ Resourceful ■ Reliable 9 <br />