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NITRATE LOADING ANALYSIS <br /> r~ <br /> � r <br /> E <br /> E <br /> Determine minimum acreage for a 4-bedroom residence <br /> Effluent Quantity(Q): 200.00 galsJday Site Area (A): 9.00 Ades <br /> Effluent Stream (N,,,): 46.50 mgt-N Concentration Rain (Nb): 0.97 mg&-N <br /> Waste Loading (VII): 2.69 i <br /> n/yr Denitrification (d): 25.0% <br /> Result: Deep Perc. of Rain (R): 6.79 in <br /> Mass Balance (N,): 10.0 mg/1-N <br /> ,! T MCLDrinking Water. 10-0 mg/L-N <br /> Percent of MCL: 100% <br /> Equations: <br /> (VII) in (Q) gal x 1 W x 363 5 day x 1 acre x 12 in x 1 <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A) acres <br /> Ncrng_= _WN_.fl-d1+13N„ <br /> L W+R <br /> Variables: <br /> t. Nc=Average nitrate-N concentration (mg/1) of combined effluent and rainfall percolate (10.01 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr). <br /> 200 gals/day on a 1 acre site (2.69 in/yr). j <br /> Nw= Total nitrate-N concentration of waste water percolate (46.5 mg/L-N). <br /> d = Fraction of nitrate-N loss due to denitrification in the soil(25%). <br /> R= Uniform deep percolation of rainfall (6-79 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/t--N). <br /> Assumptions: <br /> !^ 1. Nitrate-N concentration of waste stream based on estimate of 46.5 mg/L N. <br /> f Assumption based on work from Hantzsche and Finnemore, 1991. <br /> i <br /> 2. Fraction of nitrate-N loss due to Denitrification in the soil is assumed to be 25%. <br /> ' Assumption based on work from Hantzsche and Finnemore, 1991. <br /> a <br /> 3. Estimated deep percolation of rainfall is 6.79 in/yr, see deep percolation of rain table. <br /> 4. Assume background nitrate-N concentration of rainfall is 0.17 mg/L-N based on range by <br /> Hantzsche and Fennemore, 1991. <br /> t � <br /> v vpRs� <br /> NEIL O.ANDERSON&ASSOC.,INC. <br /> �y CEOIECHl/f1LL MMCES-9[31HMCO LASOMTCRE9 <br /> 22 Hmnt—Ln La,CA 9" 6 A. <br /> (20P)397-9701 4 s S O Lir .. <br /> "TE 10 <br /> I <br />