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t v <br /> July 17,2002 <br /> Job Number: LG02-136 <br /> Page 11 <br /> Table 7. <br /> Average Daily Flow of Septic System Effluent. <br /> Category Effluent usage People per Daily effluent quantity Average Daily Flow Rate <br /> for each day/event per category <br /> category <br /> Employees 15 gals 25 25 people* 15gal/person- 375 gpd <br /> day =375 gpd <br /> Customer 10 gals 35.7 per day 35.7 people/day* 10 357 gpd <br /> Tasting (250 weekly) gal/person-day=357 <br /> Room gal/day <br /> Special 10 gals 1000 per (4 events/year * 1000 people/event* 10 <br /> Events event gpd/person)/365days/year=110 gpd <br /> (4 per year) <br /> Sum Total Average Daily Flow: 375 gpd+357 gpd+ 110 gpd <br /> =842 d <br /> Note: GPD is gallons per day. <br /> Denitrification is an important process in septic systems that normally occurs in the leach <br /> line whereby certain bacteria utilize the oxygen in the nitrate (NOO and release nitrogen gas (NO <br /> to the atmosphere. Denitrification is expressed as a percentage, and the normally accepted range <br /> is 10 percent to 35 percent. Soils with higher clay content, moist soil conditions, high pH, and <br /> organic material denitrify about 35 percent and soils with very high sand content and fast <br /> percolation rates are estimated to denitrify at a lower rate, about 10 percent tol5 percent. Due to <br /> the occurrence of clayey soils, a typical denitrifaction factor of 25%was estimated for the site. <br /> Nitrates from Winery Waste <br /> The planned total annual production of the entire winery is 2,000 tons of grapes. The <br /> waste water generated from wine processing is the wash water needed to clean equipment and <br /> clean the inside the tanks. The majority of the winery wastewater will be generated between <br /> September and November each year. <br /> _. The winery process waste water will be generated from the sixteen(16) on site micro <br /> wineries and possibly some other off site sources depending on available disposal capacity of the <br /> facility. Winery waste water is planned to be disposed on site through a combination of <br /> evaporation ponds and land application to agricultural crop. <br /> �*4RJO <br /> 4 <br /> 1 + <br /> 2 A <br /> O <br /> J,O�♦ <br />