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Proposed Septic Sys 3 - Store <br /> i <br /> Data Input: <br /> Effluent Quantity in GPD (Q): 150 Gal/Day <br /> F! Effluent Stream in mg/L-N (N,): 44 mg/L-N <br /> Site Area in Acres (A): 1.27 Acres <br /> Concentratilon in Rain in mg/L-N (Nb) 1 mg/L-N <br /> Denitrification in percent(d): 2 ° <br /> Deep Perc. Of Rain in inches/yr(R): r <br /> Calculations: <br /> Wi=Q x Cu-Ft1Gal x (DaysNr)x (Sq-Ft/Acre x inches/Ft) x(1/A) <br /> I NG=Wi*NJI-d)+RNh <br /> Wi+R <br /> Result: <br /> Uniform waste water loading (Wi)Mass Ba <br /> lance in mg/L-N (N,): SnFchVr� <br /> Tota! Nitrate Mass <br /> M MCL Drinking Water N as N: 10 m /L-N <br /> Perecnt of MCL Nitrate as N 124 % <br /> Variables: <br /> N,= Average nitrate-N concentration (mg/L) of combined effluent and ranfall percolate <br /> Wi = Uniform waste water loading for study area (in/year) <br /> s Nw=Total nitrate-N concentration of waste water percolate (mg/L-N) <br /> d = Fraction of nitrate-N loss due to denitrification in the soil {%) <br /> R= Uniform deep percolation of rainfall (inches/yr) <br /> Nb = Background nitrate-N concentration of rainfall (mg/L-N) <br /> Assumptions: <br /> _. Effluent Stream in mg/L-N (NW): 44 mg/L-N <br /> Concentratiion in Rain in mg/L-N (Nb) 1 mg/L-N <br /> Denitrification in percent (d): 25 % <br /> Fi <br /> �1 <br />