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Hantzche and Finnemore Equation Calculator <br />Effluent Quantity (Q) 200.00 gals/day <br />Effluent Stream (Nw) 34.42 rng/L-N <br />Site Area (A) 0.46 Acres <br />Concentration Rain (Nb) 0.10 mg/L-N <br />Denitrification (d) 0.30 % <br />Average recharge rate of rainfall, in inches <br />per year (R) 8.82 in/year <br />Uniform waste water loading (I) 5.84 in/year <br />Total Nitrate-N Concentration of waste <br />water percolate (Nr) 9.66 mg/L-N <br />Nr — I*Nw(1-d)+RNb <br />I — Q*365*12 <br />(I+R) A*7.48*43560 <br />I= Volume rate of water water entering the soil averaged over the gross <br />developed area, in inches per year. <br />Nw= Total nitrogen concentration of water water, in milligrams per liter. <br />d= fraction of nitrate-nitrogen loss due to denitrification in the soil. <br />R=average recharge rate of rainfall, in inches per year. <br />Nb= Background nitrate-nitrogen concentration of rainfall recharge at the <br />water table, exclusive of waste-water influences, in milligrams per liter. <br />No Area of localized recharge? <br />60 ft Seasonal high depth to groundwater <br />Uniform waste water loading (I) 5.84 35 ft 3.5 Depth of vadose zone from bottom of DF to seasonal high groundwater <br />24 ft Total feet of confining layers from bottom of DF to seasonal high groundwater <br />69% oh 4.3 Percent confining layers in vadose zone <br />7.8 <br />1.86 <br />Input Parameters 1 point for every 10' of vadose zone <br />Calculated Paramter 1 point for every 10% confining layer <br />Result <br />Dispersal Field = DF