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t ! <br /> December 12,-2006 <br /> NOA Project Number: E06094A <br /> 3.5 Nitrate Loading Scenario <br /> A nitrate loading scenario was performed to determine the impact from the proposed project. The <br /> scenario utilizes the variables discussed previously which represent the estimated conditions and <br /> uses associated with this project. The following table presents a summary of the nitrate loading <br /> calculation for the two parcels with existing residences. <br /> U <br /> Table 3. <br /> Summary of Nitrate Mass Balance Analysis. <br /> F Result Effluent Leachfield Deep <br /> Average Daily <br /> -- (Nc)'� Acres Concen- Percolation of <br /> Parcel (mg/L- (A) Flow(Q) tration (Nw) Denitrifi- Rainfall(R) <br /> N) (gpd) (mg/L-N) cation(d) (in.) <br /> 1 8:9 2.01 350 45 35% 6.0 <br /> (4 bedrooms) <br /> =-� 4 5.9 2.96 280 45 35% 6.0 <br /> + 3 bedrooms <br /> * Maximum contaminant level(MCL) for nitrate in drinking water is 10 mg/L-N. <br /> f7 The following tables present summaries the nitrate loading calculation for the proposed parcels two, <br /> three and the designated remainder. Table 4 presents a summary of the nitrate loading calculation <br /> for the vacant`parcels. <br /> Table 4. <br /> Summary of Nitrate Mass Balance Analysis. <br /> - Result Effluent Deep <br /> (Nc) Acres <br /> Average Daily Leachfieid <br /> * Concen- Percolation of <br /> �- Parcel <br /> (mg/L- (A) (gPd)Flow(Q) ttation(Nw) Denitri6- <br /> cation(d) Rainfall(R) <br /> N) (mg/L-N) (in.) <br /> 2 8.7 2.08 350 45 35% 6.0 <br /> 4 bedrooms <br /> 3 9.0 2.0 350 45 35% 6.0 <br /> 4 bedrooms <br /> DR 4.8 5.0 350 45 35% 6.0 <br /> 4 bedrooms; <br /> * Maximum contaminant level(MCL)for nitrate in drinking water is 10 mg/L-N. <br /> •t <br /> 7 <br />