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Table 2 <br /> Nitrogen Loading Summary(Low Estimate) <br /> 24754 EAST RIVER ROAD <br /> WKA No.11306.01 <br /> A B C <br /> 1 <br /> 2 <br /> 3 Water Use 15 gal/cap:day <br /> 4 Total Site Area 10.95 acres <br /> 5 Approximate Impervious Area 3 acres <br /> 6 Pervious Area 7.95 acres <br /> 7 Annual Average Rainfall 14.06 in <br /> 8 Total Nitrogen(Domestic Wastewater) 20-70 mg/L <br /> 9 Total Nitrogen(Storm Water Runoff) 0.91-1.91 mg/L <br /> 10 <br /> 11 East Septic System Nitrogen Loading(low estimate) <br /> 12 Number of Employees 4 <br /> 13 ISeptic Tank Size 1200 gallons <br /> 14 Leach Field Area 900 ft2 <br /> 15 Total Water Use =B12*B3 gal/day <br /> 16 Annual Septic Tank Leachate Infiltrated =815*365 gal/year <br /> 17 Total Nitrogen(Domestic Wastewater) 20 mg/L <br /> 18 Annual Nitrogen Loading =815*B17*3.78*365/453592 Ib/year <br /> 19 <br /> 20 South Septic System Nitrogen Loading(low estimate) <br /> 21 Number of Employees 3 <br /> 22 Septic Tank Size 1200 gallons <br /> 23 Leach Field Area 900 ft2 <br /> 24 Total Water Use =1321*83 gal/day <br /> 25 Annual Septic Tank Leachate Infiltrated =B24*365 gal/year <br /> 26 Total Nitrogen(Domestic Wastewater) 20 mg/L <br /> 27 Annual Nitrogen Loading =B24*B26*3.78*365/453592 Ib/year <br /> 28 <br /> 29 Recharge and Nitrogen Loading from Rainfall <br /> 30 Annual Site Rainfall =B7*B4 in-acre/year <br /> 31 Runoff Coefficient* 0 <br /> 32 Annual Rainfall Infiltrated =(1-631)*830 in-acre/year <br /> 33 Annual Rainfall Infiltrated =(632/12)*43560*7.48 gal/year <br /> 34 Total Nitrogen(Storm Water Runoff) 1.91 mg/L <br /> 35 jAnnual Nitrogen Loading =B33*B34*3.78/453592 Ib/year <br /> 36 <br /> 37 Estimated Nitrogen Concentration <br /> 38 Annual Nitrogen Loading(All sources) =818+027+1335 Ib/year <br /> 39 Annual Volume Infiltrated =1333+625+816 gal/year <br /> 40 Nitrogen Concentration =(B38)/(B39) Ib/gal <br /> 41 Nitrogen Concentration =840*543592/3.78 mg/L <br /> 42 <br /> 43 *Assumed no runoff losses <br />