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Hantzche and Finnemore Equation Calculator <br /> Effluent Quantity (Q) 420.00 gals/day Hantzche and Finnemore Equation <br /> Effluent Stream (Nw) 35.00 mg/L-N Nr _ I*Nw(1-d)+RNb I _ Q*365*12 <br /> Site Area (A) 2.07 Acres (I+R) A*7.48*43560 <br /> Q=Volume of wastewater generated, in gallons per day. <br /> Concentration Rain (Nb) 1.00 mg/L-N Nw=Total nitrogen concentration of wastewater from development, in milligrams per <br /> liter. <br /> Denitrification (d) 0.30 % A= Parcel size, in acres. <br /> d =Fraction of nitrate-nitrogen loss due to denitrification in the soil. <br /> Average recharge rate of rainfall, in Inches 1.01 in/year R=Average recharge rate of rainfall, in inches per year. <br /> per year R Nb= Background nitrate-nitrogen concentration of rainfall recharge at the water table, <br /> exclusive of waste-water influences,in milligrams per liter. <br /> Uniform waste water loading (I) J2.73 in/year I= Volume rate of water water entering the soil averaged over the gross developed area <br /> Total Nitrate-N Concentration of waste <br /> water percolate (Nr) mg/L_ <br /> N <br /> Uniform waste water loading (I) 2.73 Site Specific Considerations <br /> Within 1-mile of an area of localized recharge <br /> \ � Seasonal high depth to groundwater <br /> Thickness(in feet) of vadose zone <br /> Total thickness(in feet) of clay in vadose zone and %clay in vadose zone <br /> (f" 1 Number of OWTS in 1-mile radius of site, location and distance of municipal supply wells <br /> Nitrate concentration in onsite well, nearby water wells, public well <br /> Other sources of nitrate in 1-mile radius <br /> Input Parameters Number of water wells in 1-mile radius of site, or service by public water system <br /> Date of water well installations at the site, in area <br /> Result Depth of wells, depth of grout seals <br /> Dispersal Field = DF Within a city Sphere of Influence <br /> Vadose Zone = bottom of DF to season high groundwater Number of sewered homes within 1-mile radius of site <br /> Seasonal High Groundwater= highest groundwater table since 1980 per CA Irrigation Management Information System (CIMIS) <br /> SIC Flood Control Maps(typically 1983 or 1997) Deep Percolation from Rainfall Data (2014-2018) <br /> Deep Percolation from Rainfall = Rainfall-Evapotranspiration Station Annual Ave(in)Annual Ave (%) <br /> Oakdale (194) 3.29 29% <br /> Ripon (249) 3.12 26% <br /> Manteca (70) 3.62 32% <br /> Holt(248) 3.72 31% <br /> Staten Island (242) 12.6 55% <br /> Note: Additional wastewater nitrate(Nw)contribution should be included for the additional wastewater quantity(Q)added for multiple]dwellings or bedrooms over 4. <br /> os PC-&—04 <br /> j <br /> was <br />