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-2(0 LA 5 0 �61( a <br /> Hantzche and Finnemore Equation Calculator <br /> Effluent Quantity (Q) 560.00 gals/day Hantzche and Finnemore Equation <br /> Effluent Stream (Nw) 35.00 mg/L-N <br /> Nr = <br /> I Nw(1-d)+RNb I _ Q 365 12 <br /> Site Area (A) 0.36 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) 0.35 % 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 12.60 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) 20.91 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 (Nw) mg/L-N <br /> Uniform waste water loading (I) 20.91 Site Specific Considerations <br /> VO' boo <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 /> a� Number of OWTS in 1-mile radius of site <br /> Nitrate concentration in onsite well, nearby water wells <br /> Other sources of nitrate in 1-mile radius <br /> Input Parameters Number of water wells in 1-mile radius of site <br /> Date of water well installations at the site, in area <br /> Depth of wells, depth of grout seals <br /> Dispersal Field = DF <br /> Vadose Zone = bottom of DF to season high groundwater <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 /> (i b. v Q ,�� '� v J W Oakdale (194) 3.29 29% <br /> �' a I 1` Ripon (249) 3.12 26% <br /> _C ii � Manteca3.62 3 <br /> `�Q1 IN I'T Holt(248)) 3.72 31/1% <br /> o <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 multiplel dwellings or bedrooms over 4. <br /> a, cy CP <br />