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r L <br /> August 5, 2005 <br /> NOA Project Number: E05098A <br /> Table 1. <br /> Future Staffing Level for the Wine . <br /> Year Employee Staffing Level <br /> (single shift) <br /> 2006 6 <br /> Lir <br /> 2010 15 <br /> 2025 30-40 <br /> The text from Crites and Tchobanoglous (1998) (Table 4-2) indicates that the typical office worker <br /> (includes commercial workers) use rate is 13 gpd. The EPA (19 80) Design Manual (Table 4-6) <br /> indicates the typical use rate is 14.5 gpd for an office worker. Since the Crites and Tchobanoglous <br /> _ (1998) information is the mos t.current available, our office believes it provides the best estimate of <br /> waste water flow for both residential and office worker categories. Therefore, 13 gpd*0' <br /> used for each employe., o customer,visitor, or special events are planned for the wineryti ! <br /> IThe following table presents the septic waste water uses associated with the Site. The 2025 use level <br /> of 40 employees will be used as a conservative estimate reflecting the long term maximum impact. <br /> We assume that the winery will operate a maximum of one shift for a maximum 6 days per week. <br /> U { The rates presented from the references provide general guidance but do not always reflect a match <br /> Y in usage. Careful examination, professional judgement, and experience are necessary to select a <br /> reasonable flow rate estimate. The flow rates selected for the uses associated with this project are <br /> presented in the following table. <br /> UTable 2. <br /> Typical Quantity of Effluent from Commercial Sources. <br /> Category Total People Average Quantity Average Daily Flow <br /> U per Day per Person Per 1 a cel <br /> i <br /> Employee 40 13 gal/day/personyee/day* 13 gpd/person*6/7 <br /> 2025 level emplo =446 gpd <br /> Note —gpd is gallons per day.6/7 is a conversion factor fo a 6 day work week. <br /> The daily septic waste water quantity f the year 2025 is stimated to be 446 gallons per day. <br /> The average total nitrogen concentration of domestic waste water is normally considered to be <br /> Y g g y <br /> 20-85 mg/L-N (Crites and Tchobanoglous, 1998). For the purposes of the nitrate loading estimate, <br /> U' the long-term average concentration for total nitrogen in waste water is estimated to be 60 mg/L-N. <br /> U5 <br /> R.l <br />