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Table 3. 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 /> Quantity and Quality of Domestic Wastewater <br /> According to the Site Approval application, two employees will be present on the Site <br /> five days per week. A maximum of two customers per day are anticipated; many of <br /> business's sales take place online. <br /> The estimated sewage flow rates for various uses are available from a number of <br /> references. To select an appropriate use value for the employees on the Site, Live Oak <br /> reviewed the San Joaquin County On-Site Wastewater Treatment Systems Standards <br /> (2017), Crites and Tchobanoglous (1998), and US EPA (1980). Crites and <br /> Tchobanoglous indicate that 13 gallons per day for each employee is typical for an <br /> office or industrial worker, and 5 gallons per day per user is typical for a public lavatory; <br /> these rates were used for the facility's employees and customers. <br /> The nitrate as nitrogen (N) concentration of the employee and customer use is <br /> estimated to be 85 mg/L (US EPA, 1980). <br /> LOGE 2107 Page 11 <br />