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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 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 (20 sand Tchobanoglous (1998), and EPA (1980). The indicate th13 gallo for each employee is typical for an office worker, an 5 gall7chobanoglous, typical for a stoner, these rates were used for the winery facility (Crite 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 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. According to the Site Approval Application, the proposed small winery will be open four days a week with both employees and customers present; the hours will be from 12:00 until 6:00 p.m. Two employees will operate the winery. Up to 10 customers are (3 ,4) anticipated per day that the winery is open. No marketing or special events are planned. The nitrate as nitrogen (N) concentration of these uses is estimated to 85 mg/L (Crites and Tchobanoglous, 1998). In addition to the winery uses, the existing four-bedr idence is considered for the nitrate loading. We estimate a maximum use 12 per day per bedroom for the residence. Atypical residential concentration nitrate as N is selected (3.3 (Crites and Tchobanoglous, 1998). It is possible FM4 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 future 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. LOGE 1301 Page 10