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Sunrise Trucking— Nitrate Loading Section Page 14 of 16 <br /> Our Project Number: NA157003G <br /> October 23, 2015 <br /> A denitrification factor of 25 percent was selected for the site because of the silty sand soil at 3.5 <br /> feet bgs with a rapid percolation rate. <br /> 2.3.5 Nitrate Loading Scenario <br /> A nitrate loading scenario was performed to determine the impact from the proposed project. The <br /> scenario utilizes the variables discussed previously which represent the estimated conditions and <br /> uses associated with this project. The following table presents a summary of the nitrate loading <br /> calculation for the site, as presented in Plate 8. <br /> Table 5. <br /> Summary of Nitrate Mass Balance Equation. <br /> Result Average Effluent Leachfield Deep <br /> Parcel (Nc)* Acres(A) Daily Flow Concentration Denitrification Percolation <br /> (Nw) of Rainfall <br /> (mglL-N) (0)(gpd) (d) <br /> (mg/L-N) (R)(in) <br /> 1 2.0 T37 21.4 85 25% 2.47 <br /> 'Maximum contaminant level(MCL)for nitrate in drinking water is 10 mg/L-N. <br /> 2.3.6 Impact of Nitrate Loading to Nearby Water Sources <br /> ' Since the subject property is relatively flat, we do not foresee percolating effluent affecting any <br /> surface water resources. <br /> 2.4 Discussion of Nitrate Loading Results <br /> 2.4.1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates that the development on the parcel should not cause a buildup of nitrates in the aquifer <br /> above 10 mg/L-N. <br /> 2.4.2 Methods of Mitigation <br /> Because of the favorable result of the nitrate loading calculation, no mitigation measures are <br /> warranted. <br /> '-44 <br /> ©2015 Neil O.Anderson&Associates,Inc. <br /> A Terracon Company <br />