Laserfiche WebLink
' Neste Mass Balance Calculation, Parcel <br /> (8-People, add Second Dwelling Unit) <br /> 6 <br /> Data Input: �I <br /> Occupancy: 8 people Waste Loading(W): 1.00 in/yr <br /> Gallons Per Person Per Day: 50 gpd/person Site Area(A):,5.40 Acre <br /> Effluent Quantity(Q): 400 Gals Concentration Rain(Nb): 0.17 mg/L-N <br /> Effluent Stream(Nw): 45.00 riig/L-N Denitrification(d): 25% <br /> Deep Perc.of Rain(R): 7.86 inches <br /> Result: <br /> Mass Balance(Nc): 3.95 mg/L-N i <br /> MCL Drinking Water Nitrate as N: 10.00 mg/L-N li <br /> Percent of MCL Nitrate as N 39% <br /> Equations: I! <br /> 8 people x 50 gals/day/person.=400 gals/day Find Effluent Quantity l01 <br /> (W) 'in (Q) gal x 1 fe x 365 da x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,560 fe 1 ft (A) <br /> I in/yr(site)=400 gal/day x(i cu-8/7 48 gals)x(365 days✓1 year)x(f acre/43,560sq-ff)x(12 in/1 ft)x(1 site/5.4 acres) <br /> N - WN 1-d+RN Hantzsche-Fennemom Equation(Nc) <br /> W+R 1 <br /> 3.95 mg/L-N=((i in/yr x 45 mg/L-N x{1-0.25))+(7.86 in/yr x 0.17mg/L-N))/(1 in/yr+7.86.in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mgA)of combined effluent and rainfall percolate(3.95 mg/L-N). <br /> W=Uniform waste water loading for study area(inlyr)(1 incheslyear). <br /> NW=Total nitrate-N concentration of waste water percolate(45 mg/L-N). <br /> d=Fraction of nitrate-N loss.due to denitrification in the soil(25%). <br /> R=Uniform deep percolation of rainfall(7.86 in/yr). <br /> Nb=Background nitrate-N concentration of rainfall(0.17 mg/L-N). N.I <br /> . <br /> Assumptions: q <br /> 1. Nitrate-N concentration of waste stream based on estimate of 45 mg/L-N. <br /> Assumption based on work from Hantzsche and Finnemore, 1992. <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, 1992. <br /> 3.. Estimated deep percolation of rainfall is 7.86'in/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 0.17 mg/L-N based on range by <br /> Hantzsche and Fennemore, 1992. <br /> ' IP <br /> n <br /> e <br /> .I <br /> NEIL O.ANDERSON&Assoc.,INC. + <br /> I - aEo¢wKc.4 ss„nces-sow�s+.w ueona,owcs Y � <br /> I <br /> PLATE 4 <br />