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n C) The nitrate concentration of rainfall was estimated to be 1 mg/L-N (Hantzsche and /Finnemore, 1992). Y uanti and-Quality of Domestic Wastewater 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 (2003), Crites and Tchobanoglous (1998), and EPA (1980). The references indicate that 13 gallons for each employee is typical for an office worker, and 5 gallons is typical for a bar customer; these rates were used for the winery facility (Crites and Tchobanoglous, 1998). 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 Sewage Standards which incorporate peak and surge flow factors. The estimates used in the Sewage Standards may be greater than those discussed here. According to the Site Approval Application, the proposed small winery will be open seven days a week for both employees and customers. The two owners, one additional employee, and up to 10 customers are anticipated per day. Eight marketing events per year are anticipated, with up to 50 guests present at each event. The marketing events will take place during normal `open" hours and will not require additional staff. Four additional special events will take place after the normal closing time; three employees and up to 50 guests are anticipated at each special event. The nitrate as nitrogen (N) concentration of these uses is estimated to be 85-mg/L .(Crites and Tchobanoglous, 1998). In addition to the winery uses, the existing three-bedroom residence is considered for the nitrate loading. We estimate a maximum use of 120 gallons per day per bedroom for the residence. A typical residential concentration of 45 mg/L of nitrate as N is selected (Crites and Tchobanoglous, 1998). it is possible a second dwelling unit could be constructed on the Site in the future. The second dwelling unit can be up to two bedrooms. This potential future use is considered. No contributions from the vineyard 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. LOGE1003 Page 10