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r222�N =b Assumed to be 0.1 ppm NO;-N <br /> 0.71 ac-ft(223 mg N/L) 0 -0.35)+(63.44 ac-ft x 0.1 mg/L) <br /> Nr = (0.71 ac-ft+63.44 ac-ft) <br /> Nr = 1.70 ppm as nitrate-nitrogen(NO3-N); 7.6 ppm as nitrate. <br /> IV. O.W.T.S. OPERATIONAL PARAMETERS AND COMPONENTS <br /> A. EXISTING SEPTIC SYSTEM OPERATION <br /> SSS§ 3.7. The winery facility currently has four separate restrooms (Men's/Women's) and a future <br /> restroom for the proposed Production Office Building. An overview of the OWTS operation <br /> serving the winery facility is as follows: <br /> 1. Existing Office Building: 1 - 1,500 gallon septic tank and 3 - 100 ft Leachlines(LL)trenches. <br /> 2. Existing Warehouse Building 3: 1 - 1,500 gallon septic tank and 4-80 ft long LL trenches. <br /> 3. Existing Maintenance Building: 1 - 1,500 gallon septic tank. Effluent gravity flows to D-Box connected to 3 - 100 ft <br /> LL trenches. Leachlines to be abandoned upon start of Production Office Building construction,with effluent <br /> gravity flow directly to Lift Station from tank. <br /> 4. Existing Maintenance Building: 1 -2,000 gallon septic tank. Effluent gravity flows to adjacent Lift Station. <br /> Lift Station pumps effluent through a 3"Force Main to 4- 100 ft LL trenches. The effluent enters a <br /> center-feed D-Box to remove pump energy,with effluent gravity flowing to two D-Boxes to the north and to the <br /> south connecting to the two 100 ft LL,for a total of 4- 100 ft LL trenches. <br /> 5. Proposed Production Office Building: 1 -2,000 gallon septic tank. Effluent proposed to gravity flow directly to the <br /> Lift Station. <br /> All 100%reserve replacement areas, serving the Office Building, Warehouse Building and the <br /> Maintenance Building are illustrated on the Site Plans. <br /> B. SEPTIC TANK <br /> Septic tanks store accumulated sludge, scum and effluent(clear zone)volumes, which in turn <br /> affect treatment of nitrogen within the tanks. The calculations below demonstrate that the 2,000 <br /> gallon tank referenced above can maintain sufficient hydraulic residence time (HRT) even when <br /> the ADF for all winery employees is used for this one tank. Therefore, the remaining referenced <br /> tanks are of sufficient capacity: <br /> Detention/Hydraulic Residence Time Calculation: <br /> HRT Time=2000 gal tank capacity x 0.70 (30%volume lost to sludge/scum accumulation) <br /> 1.5 (Peaking Factor)x 770 gals/day(ADF) <br /> Detention Time= 1.2 days. The minimum acceptable detention time is 1.0 day. <br /> Page -9- <br /> Chesney Consulting <br />