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Estimated Flow and Concentration (Typical Use) • <br /> Based on the existing and proposed residential and recreational use of the Site, the <br /> maximum average daily flow for the Site with its proposed development was estimated <br /> to be 556.9 gallons per day (gpd). <br /> A typical residential concentration of 35 mg/L of nitrate as nitrogen (N) is selected for <br /> the old clubhouse and trailers, and a concentration of 85 mg/L is selected for the annual <br /> party usage (Crites and Tchobanoglous, 1998). <br /> Through the use of a weighted average, the average concentration of the different <br /> effluent flows and concentrations was determined to be 35.0 mg/L-N at 556.9 gallons <br /> per day. Please see the following tables for details. <br /> Table 4. Average Daily Flow Calculation (Typical Use) <br /> Use Units Rate Subtotal Reduction Average Daily <br /> Flow <br /> Old 2 140 gal/bedroom 280 gpd none 280.0 gpd <br /> Clubhouse bedroom <br /> New 2 Not occupied --- --- --- <br /> Clubhouse bedroom <br /> Trailers 16 <br /> (1 bedroom bedroom 140 gal/bedroom 2,240 gpd 45/365 276.2 gpd <br /> each) <br /> Annual Party guests 5 gal/guest 250 gpd 11365 0.68 gpd <br /> Total 556.9 gpd <br /> Reduction factors convert calculated flow into average daily flow over a year: 45/365 and 1/365 converts for days of <br /> operation per year. These reduction factors need to be taken Into account since not all parts of the facility are <br /> occupied at all times. <br /> LOGE 1708 Page 12 • <br />