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In May 2019, Live Oak collected rainwater during two storm events in Lodi; in March <br /> and May 2020, Live Oak collected two additional samples at the same location. Each <br /> sample was collected in a clean, dry, stainless steel bowl, then decanted into a plastic <br /> container and placed on ice for transport. The samples were analyzed for nitrate by <br /> FGL Environmental of Stockton. <br /> Nitrate was detected in the May 17, 2019 sample at a concentration of 0.4 mg/L-N, in <br /> the May 19, 2019 sample at a concentration of 0.2 mg/L-N, in the March 16, 2020 <br /> sample at a concentration of 0.2 mg/L, and in the May 18, 2020 sample at a <br /> concentration of 0.4 mg/L. Live Oak then averaged the concentrations of the four <br /> samples, for a value of 0.30 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 /> No construction is proposed, and there are currently no structures on the Site. Based <br /> on the assumption of the nitrate loading method that only septic systems should <br /> be considered for the calculation, the wastewater flow from the proposed future <br /> use of the Site will be zero. <br /> Nevertheless, for the purposes of this study, a hypothetical five-bedroom main house <br /> and three-bedroom second house are assumed for each parcel. These are considered <br /> so that, should the property owners at some point in the future decide to build on the <br /> land, nitrate loading will have been addressed. <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 /> Registered Environmental Health Specialist and Land Use Program Coordinator at the <br /> San Joaquin County Environmental Health Department, stated that he has conferred <br /> with Norman Hantzsche (author of the 1992 paper discussed previously), and they have <br /> arrived at a new method to determine flow from residential sources. He indicated that <br /> wastewater flow from a single-family residence should be calculated as 100 gallons per <br /> day (gpd) for the first bedroom and 50 gpd for each additional bedroom; additional <br /> residences should be calculated in the same manner (personal communication, March <br /> 4, 2020). <br /> The first hypothetical house on each parcel will have five bedrooms, which would result <br /> in a flow value of 300 gpd using the new method. The second hypothetical house will <br /> LOGE 20-54 Page 11 <br />