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Table 5. Average Daily Flow Calculation <br /> Use Units Rate Subtotal Reduction Average Daily <br /> Flow <br /> Residence/ 5 bed 600 gallons per <br /> Second rooms 120 gal/br/day 600 gpd None day <br /> dwelling unit <br /> Winery Staff 1 staff 13 gal/staff 13 gpd 517 x 8112 6.2 gallons per <br /> day <br /> Winery 10 cust 5 gal/cust 50 gpd 317 x 8112 14.3 gallons per <br /> Customers day <br /> E Winery <br /> (4) 50 oust 5 gal/cust 250 gal/event 4/365 2.7 gallons per <br /> entday <br /> Reduction factors convert calculated flow into average daily flow over a year. This needs to be taken into account <br /> since winery hours, days, and seasonal schedule are not continuous. No reduction is used for a residence since it is <br /> continuously occupied. <br /> Table 6. Weighted Average Concentration Calculation <br /> Use Average Daily Estimated Waste Weighted Average <br /> Flow Water Quality Product <br /> Res <br /> Dwelling <br /> Unit Gond S00 gpd 45 mg/L-N 27,000 gpd-mglL-N <br /> Dwelling Unit <br /> Winery Staff 6.2 gpd 85 mg/L-N 527 gpd-mg/L-N <br /> Winery Customers 14.3 gpd 85 mg/L-N 1,215.5 gpd-mg/L-N <br /> Winery Events 2.7 85 mg/L-N 229.5 gpd-mg/L-N <br /> Totals 23.2 gpd 28,972 gpd-mg/L-N <br /> Weighted Average <br /> Concentration: 28 gpd-mglL-N 1 623.2 gpd =46.5 mg/L-N <br /> Venitrification Reductions <br /> Denitrification is a process that occurs in the septic system drain field whereby certain <br /> bacteria oxidize the nitrate (NO3) in the waste water and release nitrogen gas (N2) to the <br /> atmosphere. Due to the biologic processes in the shallow soils, nitrogen in the drain <br /> field will may undergo a reduction between 10 percent to 35 percent. Soils with higher <br /> clay content, moist soil conditions, high pH, and organic material denitrify by about 35 <br /> LOGE0911 Page 11 <br />