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Quality of Rainwater <br /> Hantzsche and Finnemore listed 1 mg/L-N as the nitrate concentration of rainwater for <br /> their original calculation; in the past, Live Oak has also utilized this value for the nitrate <br /> loading calculation. <br /> To determine a more accurate local value, Live Oak has collected rainwater during <br /> several recent storm events in Lodi. Each sample was collected in a clean, dry, <br /> stainless steel bowl, then decanted into a plastic container and placed on ice for <br /> transport. The samples were analyzed for nitrate by FGL Environmental of Stockton. <br /> The results of the rainwater sampling are as follows: <br /> Table 2. 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 /> 2/11/21 0 (Non-detect) <br /> 2/12/21 0.1 <br /> Average 0.17 <br /> Live Oak then averaged the concentrations of the nine samples, for a value of 0.17 <br /> mg/L-N to represent the nitrate concentration of rain. <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 /> LOGE 2119 Page 7 <br />