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b— �../ <br /> June 14, 2005 <br /> NOA Project Number: E05066A <br /> Table <br /> Summa of Nitrate M s Balance Analysis. <br /> Result erage Da' Effluent Leachfield Deep <br /> Acres Flow Concen- _ Percolation of <br /> Plate (Nc) * (A) able ation(Nw) DemtnfiRainfall(R) <br /> (mg/L-N) (gpd) m cation(d) (Plate 9) (in.) <br /> 10 9.1 1 5.07 366 JA 45 15% 5.76 <br /> * Maximum contaminant level(MCL) for nitrate in dnkin <br /> rig ter i§.40 mg/L-N. <br /> k14.6 Impact of Nitrate Loading to Nearby Water Sources <br /> Based on the method and assumptions described,in addition to the geologic setting, the proposed <br /> project i I not cause a build up of nitrate in the ground water above 10 mg/L-N on the site <br /> 60 over the long term. <br /> Since the Site is relatively flat,we do not foresee percolating effluent affecting any surface water <br /> resources. <br /> 5.0 DISCUSSION OF NITRATE LOADING RESULTS <br /> v <br /> 5.1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading balance indicates <br /> that the proposed development on the parcel should not cause a build up of nitrate in the ground <br /> water above 10 mg/L-N over the long term. <br /> 1// 5.2 Methods of Mitigation <br /> Because of the result of the nitrate loading calculation,no mitigation measures are warranted for the <br /> proposed project. <br /> 6.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Our office concludes that the proposed project will not cause a build up of nitrate above 10 <br /> mg/L-N in the ground water on all parcels. We recommend the EHD guidelines be followed for the <br /> �- construction of this septic system. <br /> 6.1 Signatures <br /> The signatures of the environmental professionals involved in the preparation of this report can be <br /> found on the cover sheet at the front of this package. <br /> 6 <br /> "044 <br /> 6- <br />