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09 August 2022 <br />Project No. 22-6942 <br />Page 14 of 16 <br />(0.27 inches/year + 2.99 inches/year) <br />Nr=12.10+3.26=3.71 <br />Nr = 3.71 ppm nitrogen (NO3_N) <br />PROPOSED INDUSTRIAL: <br />AdvancedGeo <br />An Employee -Owned Company <br />The Hantzsche / Finnemore (Nr) equation for commercial applications: <br />Nr=IxNw(1-d)+RxNb_(I+R) <br />Definitions: <br />Nr = The average concentration of nitrate -nitrogen in the recharged wastewater parts per <br />million of nitrate -nitrogen. <br />I = Volume rate of wastewater entering the soil averaged over the gross developed area <br />(acres) in inches per year. The total industrial wastewater volume for the proposed project <br />will be 240 gpd (proposed system) x 260 days of proposed operation = 240 x 260 days <br />7.48 gallons per cubic foot = 8,342 cubic feet of wastewater. Does not account for <br />evapotranspiration likely to occur. <br />NW = Total nitrogen concentration of wastewater at 85 mg/L-N based on the average <br />discharge. <br />d = Fraction of nitrogen concentration removed from the wastewater due to denitrification <br />within the soil (25 percent for sandy loam soils). <br />R = Estimated Deep percolation / average rainfall recharge rate per year: 2.99 inches. <br />Nb = Background nitrate -nitrogen concentration of rainfall recharge: 1.0 mg/I. The Nb is <br />an average value determined for San Joaquin County by the EHD. <br />PROPOSED INDUSTRIAL CALCULATIONS - <br />Nr =IxNw(1-d)+RxNb=(I+R) <br />Assumptions: <br />I = 62,400 gallons = 8,342 cubic feet wastewater _ [(10 acres x 43,560 feet2) _ 12 inches] <br />= 8,342 _ 36,300 = 0.23 inches/year <br />NW = 65.025 mg/L-N <br />d = 25 percent denitrification <br />R = 2.99 inches/year <br />Nb = 1.0 milligram per liter <br />Nr = [0.23 inches/year x 85 mg/L-N (1-0.25)] + (2.99 inches/year x 1.0 milligram per liter) <br />