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05 November 2014 AGE Project No. 14-3119 Page 15 of 17 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 = 25 percent denitrification R = 13 inches/year Nb = 0.1 milligram per liter Nr = [3.61 inches/year x 45 mg/L-N (1-0.25)] + (13 inches/year x 0.1 milligram per liter) (3.61 inches/year + 13 inches/year) Nr = 135.26 = 16.61 = 8.12 Nr = 8.12 ppm nitrogen (NO3_N) COMMUNITY CHURCH CALCULATIONS: Restroom (Laboratory) Mass Loading - Assumptions: = 52,122 gallons = 6,968 cubic feet wastewater - [(2.68 acres x 43,560 feet') = 12 inches] = 0.716 inches/year NW = 85 mg/L-N d = 25 percent denitrification (new system) R = 13 inches/year Nb = 0.1 milligram per liter Nr = [0.716 inches/year x 85 mg/L-N (1-0.25)] + (13 inches/year x 0.1 milligram per liter) (0.716 inches/year + 13 inches/year) Nr = 45.6 = 13.716 = 3.4 Nr = 3.4 ppm nitrogen (NO3_N) 9.7. IMPACT OF NITROGEN LOADING FROM SITE PROJECT The recharging of groundwater is the most likely potential feature that could be impacted by nitrogen loading. However, the potential vertical migration of the wastewater would be lesser with the current septic design. Based on the low volume of wastewater to be generated and the significant to ground water, the potential vertical migration would not likely degrade the local ground water. An additional of 3.4 ppm restrooms of additional nitrogen will be added to the subject site through waste water recharge; following final development of the community church. The residential mass loading of 8.12 ppm and the proposed church mass loading of 3.4 ppm with considering maximum capacity of the new church facility, could generated nitrogen loading greater than the desired value of 10 ppm. Advanced GeoEnvironmental,Inc.