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Soil Suitability / Nitrate Loading Study <br />Ehlers Property Lodi, California <br />May 13, 2021 Terracon Project No. NA217019 <br />Table 7. <br />Physical and Chemical Properties* <br />1rerracon <br />Soil <br />Soil <br />Name / <br />Depth <br />USDA <br />Unified Soil <br />Clay <br />Permeability <br />Salinity <br />Septic tank <br />Map <br />(in) <br />Texture <br />Classification <br />(%) <br />(in/hour) <br />reaction <br />(mmhoslcm) <br />absorption fields <br />(pH) <br />Symbol <br />Guard <br />0-15 <br />Clay loam <br />CL <br />27-35 <br />0.2-0.6 <br />7.9-8.4 <br /><2 <br />clay <br />Clay loam, <br />Severe: peres <br />loam <br />15-72 <br />sandy clay <br />SC, CL <br />20-35 <br />0.06-0.2 <br />7.9-8.4 <br /><2 <br />slowly <br />(169) <br />loam <br />'Selected USDA physical and chemical properties <br />2.1.2 Mass Transport Soil Properties <br />The longer the effluent remains near the surface, the more treatment is enhanced due to natural <br />processes within the soil. The percolation test has revealed that the onsite soils have a <br />moderately rapid percolation at shallow depths (<3.0 feet bgs). <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 />The proposed grain operations and hemp operations will be connected to the existing onsite <br />domestic well. <br />2.3 Sources and Impact of Nitrate to Groundwater <br />2.3.1 Current Off -Site Sources of Nitrate <br />Agriculture land use and septic systems in the area may be the most significant sources of nitrate <br />in groundwater. Septic tank usage in the vicinity is discussed in Section 1.3.5. <br />2.3.2 Contribution of Rainfall <br />An estimate of the quantity and quality of rainfall was required for the nitrate loading analysis. <br />Average precipitation and potential evapotranspiration (ETo) data was obtained from the <br />Responsive s Resourceful v Reliable 13 <br />