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Proposal 2106c: Ruvalcaba SS/NLS Addendum Page 2 <br /> February 11, 2021 <br /> Rainwater Nitrate Concentration <br /> Date Nitrate (mg/L-N) <br /> 5/17/2019 0.4 <br /> 5/19/2019 0.2 <br /> 3/16/20 0.2 <br /> 5/18/20 0.4 <br /> 1/27/21, 10:00 0 (Non-detect) <br /> 1/27/21, 19:30 0 (Non-detect) <br /> 1/29/21 0.2 <br /> Average 0.2 <br /> Live Oak then averaged the concentrations of the seven samples, for a value of 0.2 <br /> mg/L-N to represent the nitrate concentration of rain. The test results from 2021 are <br /> attached. <br /> Because the San Joaquin County Environmental Health Department has requested that <br /> local and recent data be utilized wherever possible, the concentration of the Lodi <br /> rainwater been selected for use in the nitrate loading calculation. <br /> Revised Nitrate Loading Calculations <br /> All other variables discussed in the original report remain unchanged. <br /> The assumptions for the nitrate loading calculations, including a single three-bedroom <br /> house or a single two-bedroom house are presented in the following table, as well as <br /> on the attached plates. <br />