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The nitrate concentration of rainfall was estimated to be 1 mg/LLN (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 (2003), Crites and Tchobanoglous (1998), and EPA (1980). The references indicate that 13 gallons usage for each employee is typical for an office worker, and usage of one to five gallons is typical for a bar customer; these rates were used for the vinegar processing 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 vinegar processing facility will be open seven days a week with three employees present. The tasting room will be open Thursday through Sunday; one employee and up to 20 customers are anticipated per day at the tasting room. No marketing or special events are anticipated. 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 four-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 mg1L 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. LOGE1120 Page 10