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Soil Suitability/ Nitrate Loading Study <br /> Jeremy Winery Lodi, CA Irerracon <br /> May 7, 2019 < Terracon Project No. NA197008 <br /> Table 8. <br /> Physical and Chemical Properties* <br /> Soil Soil Septic <br /> Name/ Depth USDA Unified Soil Clay Permeability reaction in/hour Salinity tank <br /> Map (in) Texture Classification (% <br /> (' ) (pH) (mmhoslcm) absorption <br /> Sym bol fields <br /> Fine <br /> 0-19 sandy SM 10-15 2.0-6.0 6.1-7.8 <2 <br /> loam <br /> Tokay Fine 2.0-6.0 6.1-7.8 <2 <br /> 256 19-45 sandy SM 10-18 Slight <br /> loam <br /> 45-60 Sandy SM 8-15 2.0-6.0 6.1-7.8 <2 <br /> loam <br /> 'Selected USDA physical and chemical properties <br /> 2.1.2 Mass Transport Soil Properties <br /> The percolation test has revealed that the stiff sandy silt to silty sand soils have a slow percolation <br /> rate at 3.5 feet bgs and 25 feet bgs. The longer the effluent remains near the surface, the more <br /> treatment is enhanced due to natural processes within the soil. Based on the slow percolation <br /> and stiffness/cementation of the soils, effluent is anticipated to remain within the soil column. <br /> 2.2 Groundwater Analysis <br /> 2.2.1 Regional Groundwater <br /> A discussion of regional groundwater, including depth to groundwater is included in Section 1.4.1. <br /> No significant seasonal trends were evident from the sources consulted. <br /> 2.2.2 Potential Ground Water Contamination Issues <br /> A discussion of issues related to potential groundwater contamination is included in Section 1.4.2. <br /> 2.2.3 Current and Future On-Site Ground Water Uses <br /> A new groundwater supply well is proposed to provide drinking water on the site. <br /> 2.3 Sources and Impact of Nitrate to Groundwater <br /> 2.3.1 Current Off-Site Sources of Nitrate <br /> Agriculture and septic systems in the area may be the most significant sources of nitrate in <br /> groundwater. Septic tank use in the vicinity is discussed in Section 1.3.5. <br /> Responsive ■ Resourceful ■ Reliable 14 <br />