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• 35 mg/L of nitrate as N is selected for the existing residences (Crites and <br /> Tchobanoglous, 1998). <br /> No contributions from crop irrigation or soil amendments are considered for the <br /> Hantzsche/Finnemore method. It is reasonably assumed that the irrigation and <br /> soil amendments would be applied at close to agronomic rates for a net balance <br /> of plant irrigation and nutrients. <br /> The maximum average daily flow for the Site was estimated to be 1,106.4 gallons <br /> per day (gpd). Through the use of a weighted average, the average <br /> concentration of the different effluent flows and concentrations was determined to <br /> be 40.7 mg/L-N at 1,106.4 gallons per day. Please see the following tables: <br /> Table 6-1. Average Daily Flow Calculation <br /> Use Units Rate Subtotal Reduction Average Daily <br /> Flow <br /> Residences 7 140 gal/bedroom 980 gpd none 980 gpd <br /> bedroom <br /> Employee 3 13 gal/employee 39 gal 5/7 27.9 gal <br /> (Mon.-Fri.) employee <br /> Employee 2 13 gal/employee 26 gal 1/7 3.7 gal <br /> • (Saturday) employee <br /> Employee 1 13 gal/employee 13 gal 1/7 1.9 gal <br /> (Sunday) employee <br /> Customers 12 5 gal/customer 60 gpd 5/7 42.9 gpd <br /> (Mon.-Fri.) <br /> Customers 50 5 gal/customer 250 gpd 1/7 35.7 gpd <br /> (Saturday) <br /> Customers 20 5 gal/customer 100 gpd 1/7 14.3 gpd <br /> (Sunday) <br /> Total 1,106.4 gpd <br /> Reduction factors convert calculated flow into average daily flow over a year: 5/7 and 1/7 convert for days of <br /> operation per week. These reduction factors need to be taken into account since the numbers of customers <br /> and employees vary depending on the day of the week. <br /> • LOGE 1820 Page 6-2 <br />