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Table 5. Average Daily Flow Calculation <br /> Use Units Rate Subtotal Reduction Average <br /> Daily Flow <br /> Farm Services 2 13 gal/employee 26 gpd 5/7 18.6 gpd <br /> Employees (5 days) <br /> Tasting Room <br /> Employees 2 13 gal/employee 26 gpd None 26 gpd <br /> (7 days) <br /> Tasting Room 10 5 gal/cust 50 gpd None 50 gpd <br /> Customers (7 days) <br /> Milling / Processing <br /> Employees 4 13 gal/employee 52 gpd 4/12 17.3 gpd <br /> (4 months) <br /> Marketing <br /> Event Customers 125 5 gal/cust 625 gpd 15/365 25.7 gpd <br /> (15x per year) <br /> Total � ��o� 137.6 gallons <br /> per day <br /> Reduction factors convert calculated flow into average daily flow over a year. This needs to be taken into account since winery/olive <br /> mill hours,days,and seasonal schedule are not continuous. <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 wastewater 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 /> percent, and soils with high sand content and fast percolation rates tend to denitrify at a <br /> lower rate of about 10 percent. <br /> A standard denitrification factor of 25 percent (Hantzsche and Finnemore, 1992) was <br /> selected for the Site because of the silty soil p sent in the septic system area. <br /> Nitrate Loading Estimate <br /> A nitrate loading scenario was employed to determine the impact from the proposed <br /> project to ground water. The scenario utilizes the variables discussed previously, which <br /> represent the estimated conditions and uses associated with this project. The following <br /> LOGE 1903 Page 14 <br />