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January 4, 2006 <br /> NOA Project Number:E06115A <br /> Page 2 <br /> Table 2. <br /> S mmary of Nitrate Mass Balance Anal sis. <br /> Result Average Daily Effluent Leachfield Deep <br /> * Acres Flow(Q) Concen- Percolation of <br /> Parcel ( g L N) (A) ('fable 3) tration(Nw) Dno�- Rainfall <br /> �) <br /> (gpd) (mg/L-N) (Plate 9) (in.) <br /> With <br /> residence 7.3 26 2,212 gpd 45 35% 4.0 <br /> Without 6.1 26 1,722 gpd 45 35% 4.0 <br /> residence <br /> * Maximum contaminant level(MCL) 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,out 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 /> ANanR. Kr er, <br /> Staff Scientist <br />