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.. �ftw <br /> March 28, 2005 <br /> NOA Project Number: E04132A <br /> L, <br /> GPage - <br /> Cthe same estimates is in the report, but with a smaller size parcel, the <br /> results are as follows. Further details can be found on Plates 1 and 2 . <br /> L' <br /> GTable 2. <br /> ❑Summary of Nitrate Mass Balance Analysis.Plate <br /> ❑Result <br /> ❑(Nc) * <br /> O(mg/L-N) <br /> OAcres <br /> 7(A) <br /> OAverage Daily Flow (Q) (Table 3) <br /> O(gpd) <br /> ❑Effluent Concen- <br /> tration (Nw) <br /> O(mg/L-N) <br /> OLeachfield <br /> ODenitrifi-cation (d) <br /> ODeep Percolation of Rainfall (R) <br /> ❑(Plate 9) (in. ) <br /> 01 <br /> 07.0 <br /> ❑5.0 <br /> ❑490 <br /> 045 <br /> 0258 <br /> ❑5.84 <br /> O * Maximum contaminant level (MCL) for nitrate in drinking water is <br /> 10 mg/L-N. <br /> -Using this calculation, the building of houses on the smaller parcels will not <br /> cause a long term build up of nitrates above 7.0 mg/L-N. <br /> 11 <br /> '-15. 0: The source of nitrate in the area is mostly the deep pit septic systems <br /> and agriculture and because the new houses will be using deep pits, there is the <br /> chance of nitrates reaching the ground water. However, the favorable result from <br /> the NLS and the presence of the clayey soils lead us to believe that the <br /> development will not likely contribute large amounts of Nitrate to the ground <br /> water over the long term. <br /> O <br /> OWe appreciate your recommendations for this project and your continued interest <br /> in our work. <br /> O <br /> ❑Best Regards, <br /> LI <br /> C <br /> DDavid Welch, M.Sc. <br /> ❑CEG-2151, CHG-653, GP-1049 <br /> OEnvironmental Department Manager <br /> O <br /> O <br /> ❑CC: Mr. Pilkington <br />