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i` <br /> L 3.5 Nitrate Lo ding Scenario <br /> Lcena�rio <br /> te loading sc nario was performed to determine the impact from the proposed project. The <br /> L utilizes th variables discussed previously which represent the estimated conditions and <br /> sociated this project The following table presents a summary of the nitrate loading <br /> tion for a parcel. <br /> L <br /> Table 2. <br /> S mmary of Nitrate Mass B ance Analysis. <br /> Parcel Result Acres Average Daily /'Effluent Leachfreld Deep <br /> (Nc) * (A) Flory(Q) Concen- Denittifi- Percolation of <br /> (mg/L-N) (Table-3)— 'tration(Nw) cation(d) Rainfall (R) <br /> (gpd) (mg/. (Plate 9) (in.) <br /> 1 4.9 7.79 ( 112 85 35% 2.52 <br /> * Maximum contaminant le I(MCL for nitrate in drinking water is 10 mg/T,N. <br /> � I <br /> 3.6 Impact of Nitrate Loading to Nearby Water-sources <br /> Based on the method and assumptions described,in addition to the geologic setting a do not <br /> believe the proposed project will cause a build up of nitrate in the ground water ab v 0 N <br /> over the long term. <br /> Since the site is relatively flat,we do not foresee percolating effluent affecting any surface water <br /> resources. <br /> 4.0 DISCUSSION OF NITRATE LOADING RESULTS <br /> 4.1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the-nitrate loading b ce indicates <br /> that the proposed development on the site arcels should not cause a build up of to in the <br /> groundwater above 10 mg/L-N over the to term. <br /> 4.2 Methods of Mitigation <br /> r Because of the favorable result of the nitrate loading calculation,no mitigation measures are <br /> warranted. <br /> r <br /> 5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> r Our office concludes that the proposed project will not cause a build up of nitrates above 10 / <br /> mg/L-N in the ground water over the long term. We recommend the EHD guidelines be followed <br /> for the construction of the septic system. <br /> .. 6 I <br />