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C. Soil Analytical Chemical Test Results �!� So' samples for alytical testing were retrieved from the depths referenced above. The attached 011 Analyses Repo illustrates the test results. Analyzed constituents relating to nitrate loading ude the organic matter content of the soil, pH, Cation Exchange Capacity(CEC), and the nitrate-nitrogen content. The organic matter is low throughout the shallow soil profile, indicating a\ low contribution of nitrogen release. The pH is alkaline at both tested depths. This alkalinity can inhibit nitrification and promote denitrification. The CEC indicates the soil potential to retain ammonium molecules that are in the septic system effluent. The CEC has a potential to inhibit nitrification, and is of medium concentration in the soil profile. Of signific a is the nitrate- nitrogen concentrations at each de yealing a medium concentration o 9 tpm at 24 inches, but a significant decrease at 36 inches 3 pp)n NO3-N. This may be attributedtd the 24 inch deep sample retrieved from under the law a. The Table below summarizes the important soil parameters analyzed: TABLE 2 I SUMMARY OF SOIL ANALYSIS DEPTH OF SAND SILT CLAY USDA/USCS NITRATE-N pH/CEC SAMPLE % % % SOIL TEXTURES CO NT 24 Inches 39% 36% 25% Loan,//Silty Lean Clay 9 ppm 7.7/14.8 (From awn) 36 Inches 39% 34% 27% Cla7 Loam/Lean 3 ppm 7.7/13.0 Clay with silt (From Under 4 Soil) III. GROUNDWATER TEST RESULTS The groundwater directional flow is generally assumed to be in a northeasterly direction toward the San Joaquin River. It is also generally acceptedthat gro, at ically flows with the topography of the land surface. As noted from the attar d at m , the land surface declination is in a northeast direction. 11 The depth to the water table could not be measured in the on-site domestic well. However, the L static water level was measured at 68 feet deep in a domestic well 100 yards to the west of the ~ subject property. As referenced, the Prioste's plan to drill a new, deeper well 10 to 15 feet west of the existing well. Consequently,this existing domestic well water supply was tested for analysis, with the results discussed below. Page -5- Chesney Consulting