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The nitrate concentration of rainfall was estimated to be 1 mg/L-N (Hantzsche and Finnemore, 1992). Quantity and Quality of Domestic Wastewater Ms. Paskett indicated that the tasting room will be open three days per week. During these days, one employee will be present. An estimated four to 10 customers per day are anticipated. No special events are anticipated. Ms. Paskett stated that the houses on the Site are unoccupied; the main house has two bedrooms, while the guesthouse has one bedroom. In the event that the houses should be occupied in the future, they are considered for the calculation. The estimated sewage flow rates for various uses are available from a number of references. The uses presented below were guided by the San Joaquin County On-Site Wastewater Disposal Standards (2016), Crites and TchobanogIous (1998), and US EPA (1980). The references indicate that 13 gallons for each employee is typical for an office or industrial worker and 3 gallons is typical for a bar customer; these rates were used for the tasting room employee and customers (Crites and Tchobanoglous, 1998). Crites and Tchobanoglous (1998) list a typical flow rate of 50 to 70 gallons per person per day for an individual residence. The San Joaquin County Enviromental Health Department has indicated that maximum flow and double occupancy within each bedroom should be considered for the nitrate loading assessment, as a result, a value of 140 gallons per bedroom per day has been selected (personal communication, January 6, 2017). The estimated flow values discussed here should not be used for the design and sizing of the septic system. The design and sizing of the septic system should utilize the San Joaquin County Environmental Health Department On-Site Wastewater Disposal Standards which incorporate peak and surge flow factors. The estimates used in the On-Site Wastewater Disposal Standards may be greater than those discussed here. The nitrate as nitrogen (N) concentration of the customer and employee use is estimated to be 85 mglL (US EPA, 1980). A typical residential concentration of 35 mglL of nitrate as N is selected for the existing residences (Crites and Tchobanoglous, 1998). No contributions from crop irrigation or soil amendments are considered for the Hantzsche/Finnemore method. It is reasonably assumed that the irrigation and soil amendments would be applied at close to agronomic rates for a net balance of plant irrigation and nutrients. No contribution from winery process water is considered; the actual wine production will take place elsewhere. LOGE 1729 Page 10