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Nitrate Loading Data: <br /> Variable Value Units Description <br /> Effluent Quanity(Q): 280 gpd effluent flow rate <br /> Effluent Stream(N,): 20 mg/L-N effluent stream concentration <br /> Site Area(A): 1 Acres Site area <br /> Concentration Rain(Nb): 1 mg/L-N Concentration of rain <br /> Denitrification(d): 0.190 constant Denitrification Factor <br /> Deep Perc.Of Rain(R)l 2.65 1 In./yr. I Deep percolation of rain water <br /> Table 1-Nitrate Loading Data <br /> Waste Loading(W): 1 7F In./yr. Uniform Waste Water Loading <br /> (W)in/yr=(Q)gal/day X 1 ft3/7.48 gal X 365 day/lyear X 1 acre/43,560 ft'X 12 in/1 ft X 1/(A)acre <br /> Nitrate Loading Calculations <br /> Nitrate loading Calculation(Nc):1 2 mg/L-N jAverage Nitrate Conentration <br /> N�=WN...(1-d)+11% Hantzche-Finnemore Equation <br /> W+r <br /> (C)runoff(in) (P)Rainfall(in) Curve Number(CN) 5 Q =runoff(in)I' =rainfall(in) <br /> 1.01 2.36 83.95 1.91 <br /> S =potential maximum retention after runoff <br /> 0.00 0.42 83.95 1.91 begins(in)and <br /> 0.66 1.89 83.95 1.91 I, =initial abstraction(in) <br /> 0.09 0.01 83.95 1.91 <br /> 0.10 0.00 83.95 1.91 <br /> 0.10 0.00 83.95 1.91 @_(P_0.2S)2 leQ._�) <br /> 0.01 0.24 83.95 1.91 P+0.8S <br /> 0.10 0.00 83.95 1.91 S is related to the soil and cover conditions of the <br /> 0.12 0.93 83.95 1.91 watershed through the CN.CN has a range of 0 to 100, <br /> 1.70 3.22 83.95 1.91 and S is related to CN by: <br /> 0.13 0.94 83.95 1.91 <br /> _1000 <br /> 0.08 0.03 83.95 1.91 S C�-10 (eq.2 t) <br /> Hydrologic Soil Group Area of Soil Type(Acres)Percentage of Soil Typ Site CN <br /> Jahant Loam D 4.7 0.061 84 <br /> San Joaquin Loam D 41.3 0.542 84 <br /> San Joaquin Complex D 29.4 0.386 84 <br /> San Joaquin-Urban Land C 0.8 0.011 79 <br /> Weighted Average= 83.95 <br /> 1.The Open Space(good condition)for Urban Areas as a conservative factor was used for calculations. <br /> Evotranspiration Adjsuted Precipitation Average Runoff Rate Available Net Rainfall <br /> (In/month) Evotranspiration (in/month) M Precipitation Recharge <br /> 3.22 2.25 2.36 0.003 2.35 0.10 <br /> 5.27 3.69 0.42 0.003 0.42 0.00 <br /> 5.98 4.19 1.89 0.003 1.88 0.00 <br /> 7.99 5.59 0.01 0.003 0.01 0.00 <br /> 8.46 5.92 0 0.003 0.00 0.00 <br /> 7.65 5.36 0 0.003 0.00 0.00 <br /> 5.52 3.86 0.24 0.004 0.24 0.00 <br /> 4.12 2.88 0 0.004 0.00 0.00 <br /> 2.18 1.53 0.93 0.005 0.93 0.00 <br /> 1.05 0.74 3.22 0.006 3.20 2.46 <br /> 1.22 0.85 0.94 0.001 0.94 0.09 <br /> 3.07 2.15 0.03 0.001 0.03 0.00 <br /> Sum 55.73 39.01 10.04 1 1 1 2.65 <br /> Table 2-Deep Percolation of Rain <br /> 1.Referece Eto from DWR/CIMIS for Zone 12,East Side sacramento-San Joaquin Valley;0.7landscape multiplier. <br /> 2.https://cimis.water.ca.gov/App_Themes/images/etozonemap.jpg <br /> Deep Perc.Of Rain(R)l 2 In./yr. Deep percolation of rain water <br /> `Western Regional Climate Center <br /> https://wrcc.dri.edu/cgi-bin/cliMAIN.pl?ca5O32 <br /> CIMIS <br />