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Table 6. Average Daily Flow Calculation (Full Occupancy) • <br /> Use Units Rate Subtotal Reduction Average Daily <br /> Flow <br /> Old 2 <br /> Clubhouse bedroom 140 gal/bedroom 280 gpd none 280 gpd <br /> New 2 140 gal/bedroom 280 gpd none 280 gpd <br /> Clubhouse bedroom <br /> Trailers 16 <br /> (1 bedroom bedroom 140 gal/bedroom 2,240 gpd none 2,240 gpd <br /> each) <br /> Annual Party 50 guests 5 gal/guest 250 gpd 1/365 0.68 gpd <br /> Total 2,800.68 gpd <br /> Reduction factors convert calculated flow Into average daily flow over a year: 1/365 converts for days of operation per <br /> year. These reduction factors need to be taken into account since not all parts of the facility are in operation at all <br /> times. <br /> Table 7. Weighted Average Concentration Calculation (Full Occupancy) <br /> Use Average Daily Estimated Waste Weighted Average <br /> Flow Water Quality Product • <br /> Old Clubhouse 280 gpd 35 mg/L-N 9,800 gpd-mg/L-N <br /> New Clubhouse 280 gpd 35 mg/L-N 9,800 gpd-mg/L-N <br /> Trailers <br /> (1 bedroom each) 2,240 gpd 35 mg/L-N 78,400 gpd-mg/L-N <br /> Annual Party 0.68 gpd 85 mg/L-N 57.8 gpd-mg/L-N <br /> Totals 2,800.68 gpd 98,057.8 gpd-mg/L-N <br /> Weighted Average 98,057.8 <br /> Concentration: gpd-mg/L-N/ 2,800.68 gpd = 35.0 mg/L-N <br /> Denitrification 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 may undergo a reduction between 10 percent to 35 percent. Soils with higher clay <br /> content, moist soil conditions, high pH, and organic material denitrify by about 35 <br /> 5 <br /> , <br /> LOGE 1708 Page 14 • <br />