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%W •W <br /> January 4, 2006 <br /> NOA Project Number:E06115A <br /> Page 2 <br /> Table 2. <br /> S mmary of Nitrate Mass Balance Analysis. <br /> Result Average Daily Effluent Deep <br /> Leachfield <br /> Parcel (Nc) s Acres Flow(Q) Conten- De�t�- Percolation of <br /> (mg/UN) (A) �(gpd)able 3) tration(mg/I<N)) cation(d) (P19)(in.) <br /> With <br /> residence 7.3 26 2,212 gpd 45 35% 4.0 <br /> residence 1 <br /> 6.1 26 1,722 gpd 45 35% 4.0 <br /> * Maximum contaminant level(TN1CL) for nitrate in drinking water is 10 mg/L-N. <br /> Impact of Nitrate Loading to Nearby Water Sources <br /> Without the recreational vehicles or residence,the nitrate load on the property will be significantly <br /> lower than estimated in the Table 2. Based on the method and assumptions described,in addition to <br /> the geologic setting,we do not believe the proposed project will cause a build up of nitrate in the <br /> ground water above 10 mg/L-N over the long term. <br /> Since the site is relatively flat,we do not foresee percolating effluent affecting any surface water <br /> resources. <br /> Methods of Mitigation <br /> Because of the result of the nitrate loading calculation,no mitigation measures are warranted. <br /> LIMITATIONS <br /> Our professional services were performed,our findings obtained,and our conclusions proposed in <br /> accordance with generally accepted engineering principles and practices. This warranty is in lieu of <br /> all other warranties either expressed or implied. Test findings and statements of professional <br /> opinion do not constitute a guarantee or warranty, expressed or implied. <br /> NEIL O.ANDERSON&ASSOC.,INC. <br /> Nancy �. K rer, <br /> Staff Scientist <br />