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Test results reveal a rapid perc rate of5,.,1_minutes per inch_(mpi) for the 42 inch boring. <br /> Consequently, this acceptable percolation rate demonstrates sufficient percability at 42 inches and <br /> will not require th4t thg seMtic,system,for tY�lsroaect be_engineered. <br /> C. Soil Analytical Chemical Test Results <br /> Soil samples for analytical testing were retrieved from the depths referenced above. The attached <br /> Soil Analysis Report illustrates the test results. Analyzed constituents relating to nitrate loading <br /> include the organic matter content of the soil, pH, Cation Exchange Capacity(CEC), and the <br /> nitrate-nitrogen content. The organic matter is low throughout the shallow soil profile, indicating a <br /> low contribution of nitrogen release. The pH is alkaline at each tested depth. This alkalinity can <br /> inhibit nitrification and promote denitrification. The CEC indicates the soil potential to retain <br /> ammonium molecules that are in the septic system effluent. The CEC has a high potential to <br /> inhibit nitrification, and is high in the soil profile. Of significance is the nitrate-nitrogen <br /> concentrations at each depth, revealing a low concentration at 0-6 inches,but a significant decrease <br /> at 24 inches to 1 ppm NO3-N which may be attributed to denitrification, but then back to a low <br /> concentration of 11 ppm at 42 inches. This may be from re-nitrification. The Table below <br /> summarizes the important soil parameters analyzed: <br /> TABLE 1 <br /> SUMMARY OF SOIL ANALYSIS <br /> DEPTH OF SAND SILT CLAY USDA/USCS NITRATE-N pH/CEC <br /> SAMPLE % % % SOIL TEXTURES CONTENT <br /> 0-6 Inches 33% 34% 32% Clay Loam/Silty Lean 12 ppm 7.7/19.7 <br /> Clay <br /> 24 Inches 35% 42% 22% Clay Loam/Silty Lean 1 ppm 8.0/19.0 <br /> Clay <br /> 42 Inches 29% 38% 32% Loam/Silt 11 ppm 7.8/24.4 <br /> III. GROUNDWATER TEST RESULTS <br /> The depth to the water table was measured in Mr. Rios' domestic well and found to be 68 feet from <br /> the top of the well casing. This well will serve the residential structure and the new winery. <br /> Consequently, this domestic water supply was tested for analysis, with the results discussed below <br /> It is typically assumed the groundwater directional flow is in a northeasterly direction towards the <br /> San Joaquin River. <br /> Page -4- <br /> Chesney Consulting <br />