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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. The most recent test results from <br /> 2021 are included in Appendix 6. <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 /> Mr. Serna indicated that he is planning to construct a three-bedroom house; the existing <br /> house also has three bedrooms (personal communication, February 18, 2021). <br /> Crites and Tchobanoglous (1998) list a typical flow rate of 50 to 70 gallons per person <br /> per day for an individual residence. In the past, San Joaquin County Environmental <br /> Health Department has requested that the flow rate be calculated as 140 gallons per <br /> bedroom per day to reflect maximum usage. On March 4, 2020, however, Michael Kith, <br /> Lead Registered Environmental Health Specialist at the San Joaquin County <br /> Environmental Health Department, stated that he has conferred with Norman Hantzsche <br /> (author of the 1992 paper discussed previously), and they have arrived at a new <br /> method to determine flow from residential sources. He indicated that wastewater flow <br /> from a single-family residence should be calculated as 100 gallons per day (gpd) for the <br /> LOGE 2109 Page 10 <br />