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nitrate-nitrogen is not occurring, as evidenced by the test results. All of the waste application <br /> fields possess an above average Cation Exchange Capacity (CEC) which indicates the clay soil <br /> can attract and hold positively charged cations, particularly ammonium ions. Higher CEC soils <br /> theoretically reduce nitrate formation by impeding nitrification or the transformation of <br /> ammonium to nitrate. <br /> GROUNDWATER ANALYSIS <br /> The Tosta Dairy has three monitoring wells which are orientated around the home dairy site as <br /> illustrated on the attached plot map. These wells were installed in 1996 under a requirement by <br /> _ the California Regional Water Quality Control Board and the San Joaquin County Department of <br /> Environmental Health. Elevations of the monitoring wells were determined by the engineering <br /> firm of Schack and Company, Inc. - Tracy, CA. <br /> Well Top of Ground Depth to Depth to Depth of Water <br /> Number Casing Elevation Water Water Well Table <br /> Elevation From From Elevation <br /> T.O.C. Ground <br /> Elevation <br /> MW#1 4.93' 2.38' 6.48' 3.93' 18.10' -1.55 <br /> MW#2 4.89' 2.28' 5.32' 2.71' 23.10' -0.43 <br /> MW#3 4.30' 1.25' 8.15' 5.10' 23.75' -3.85 <br /> The following data was obtained during well purge procedures prior to groundwater sampling: <br /> MONITORING WELL #1 NORTH <br /> Purge Volume Temperature pH Elect. Cond. - EC <br /> Initial - 0 gallons 61.3 7.8 5100 <br /> 4 gallons 61.7 7.4 5250 <br /> 8 gallons 61.5 7.4 5170 <br /> 12 gallons 61.3 7.4 5170 <br /> 16 gallons 61.4 7.4 5170 <br /> 3 <br /> Vaffey Ag Prsearch <br />