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05 November 2014 AGE Project No. 14-3119 Page 15 of 17 NWrestrooms = Total nitrogen concentration of wastewater at 85 mg/L-N based on the average discharge. NWkitchen = Total nitrogen concentration of wastewater at 45 mg/L-N based on the average discharge. d = Fraction of nitrogen concentration removed from the wastewater due to denitrification within the soil (20 percent for clay type soils). R = Average rainfall rate per year: 13 inches. Nb = Background nitrate-nitrogen concentration of rainfall recharge, from wastewater influences. RESIDENTIAL CALCULATIONS: Nr = I x Nw (1-d)+ R x Nb - (I+R) Assumptions: 262,800 gallons = 7.48 gallons per cubic foot = 35,133 1 = 262,800 gallons = 35,133 cubic feet wastewater + [(2.68 acres x 43,560 feet') _ 12 inches] = 3.61 inches/year NW = 45 mg/L-N d = 20 percent denitrification R = 13 inches/year Nb = 0.1 milligram per liter Nr = [3.61 inches/year x 45 mg/L-N (1-0.20)] + (13 inches/year x 0.1 milligram per liter) (3.61 inches/year + 13 inches/year) Nr = 131.26 + 16.61 = 7.09 Nr = 7 ppm nitrogen (NO3_N) COMMUNITY CHURCH CALCULATIONS: Laboratory/Restroom Mass Loading - Assumptions: I = 52,122 gallons = 6,968 cubic feet wastewater _ [(2.68 acres x 43,560 feet2) + 12 inches] = 0.716 inches/year NW = 85 mg/L-N d = 20 percent denitrification R = 13 inches/year Nb = 0.1 milligram per liter Nr = [0.716 inches/year x 85 mg/L-N (1-0.20)] + (13 inches/year x 0.1 milligram per liter) (0.716 inches/year + 13 inches/year) Nr = 49.9 _ 13.716 = 3.64 Nr = 3.64 ppm nitrogen (NO3_N) Restaurant/Kitchen Mass Loading - Assumptions: I = 102,960 gallons = 13,764 cubic feet wastewater + [(2.68 acres x 43,560 feetz) _ 12 inches] = 1.41 inches/year NW = 45 mg/L-N d = 20 percent denitrification R = 13 inches/year Nb = 0.1 milligram per liter Advanced GeoEnvironmental,Inc.