Laserfiche WebLink
4 <br /> Septic Sys 1 - Permanent Residence <br /> F-, <br /> Ll <br /> Data Input: <br /> Effluent Quantity in GPD (Q): 350 Gal/Day <br /> E Effluent Stream in mg/L-N CN )= 44 mg/L-N <br /> Site Area in Acres (A): 1.27 Acres <br /> Concentratiion in Rain in mg/L-N (Ne) 1 mg/L-N <br /> _+ Denitrification in percent (d): 25 <br /> Deep Perc. Of Rain in inches/yr(R): 2.86 In/yr <br /> Calculations. <br /> Wi=Q x Cu-FVGal x(Days/Yr)x (Sq-Ft/Acre x Inches/Ft)x(1/A) <br /> Nc = Wi*N 1-d +RN <br /> Wi+R <br /> Result: <br /> Uniform waste water loading (Wi) 3.70 Inches/Yr <br /> Mass Balance in mg/L-N (N,): 19.06 mg/L-N <br /> Total Nitrate Mass 35 lbs <br /> - MCL Drinking Water N as N: 10 m /L-N <br /> Perecnt of MCL Nitrate as N 1-9 1 <br /> o/Q <br /> Variables: <br /> i <br /> =Average nitrate-N concentration (mg/L) of combined effluent and ranfall percolate <br /> F, Wi = Uniform waste water loading for study area (infyear) <br /> 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 /> Fi R = Uniform deep percolation of rainfall (incheslyr) <br /> -- Nb = Background nitrate-N concentration of rainfall (mg/L-N) <br /> Assumptions: <br /> Fii Effluent Stream in mg/L-N (NW): 44 m /L- <br /> g N <br /> Concentratiion in Rain in mg/L-N (Nb) 1 mg/L-N <br /> Denitrification in percent (d): 25 <br /> i <br /> �: I <br />