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NITRATE LOADING STUDY- DATA <br /> Data lnpat: <br /> Q—tty(Q) 40 gaIrlday Concentration Rain(N�- ,00m LN <br /> Stream(N„). 3.00 -N LDenitrification(d): 5.0% <br /> Site Arra(A). .73Acres Deep Pere.of Rain(R): .76 iml r <br /> Equations: <br /> (W) Ia_ -(Q> gW = _t_F x 365d x 3s_ x 12.ia x L Rbrd(F) <br /> yr day 7.45 yak 1 year 43,590 t' it (A)eCte <br /> 0.33 in/yr(rite)=740 gal/dnyx(1 eu-11/7.48 grin)x(365*W/1 year)x(1 acre/43,360 sq ft)x(11 in/1If)x(1 sire/9.73 acres) ^� <br /> N,-WN 11-d)-RN HamRtc'1u-F-emtemer6Emnrioa Mc) y <br /> W-R <br /> 7.56 mWL-N=((0.33 aa/yr x 35 mg/4N x(1-0.15))+(3.76 bdyr x 1mg1L-N))/(0 fidyr+5.74 lWyr) <br /> Result: <br /> Mass Balance(N,I:7.6 mg/LN <br /> MCL Drinking Water Nitrate as N:10.0 mg/L-N Waste Loading(W):0.337 <br /> Percent of MCL Nitrate as N 26% <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg4)of combined efRuent and rainfall percolate(2.56 mga N). <br /> W=Uniform waste water loading for study area(idyx)(0.33 mches(yew). <br /> Nw=Total nitrate-N concentration of waste water percolate(35 mg/1A). <br /> d-Fraction of nitrate-N loss due to denitrificatica in the roil(15%). <br /> R=Uniform deep percolation of rainfall(5.76 inlyr). <br /> Nb=Background niftme-N concentration ofrainfall(I mglGN). <br /> Assumplloas: <br /> 1. Total nitrogen concentration ofwade abeam based on estimate of 35 mWL N. <br /> 2. Fmfion ofnitrate-N loss due to denitrification in the soil is assumed in be 15%. <br /> 3. Patimated deep percolation ofreinfall is 3.76 inlyr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is I mg/L-N. '' <br />