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percent, and soils with high sand content tend to denitrify at a lower rate of about 10 <br />percent. <br />A denitrification factor of 35 percent was selected for the Site because of the clayey soil <br />present at the percolation test locations and reported by the Soil Survey. <br />Nitrate Loading Estimate <br />Three nitrate loading scenarios have been created for the project Site, addressing <br />each parcel with no future development as well as with two theoretical future <br />homes. The nitrate loading scenarios utilize the variables discussed previously, which <br />represent the estimated conditions and uses associated with this project. <br />The following table presents a summary of the assumptions for the nitrate loading <br />calculations for the Site assuming no future development, as presented in Plates 17 <br />and 18. <br />Table 4. Assumptions for Nitrate Loading Calculation, No Development <br />Variable Value Units Description <br />Q (A,B,C) 0 gpd Effluent flow rate (no development), Parcels A, B, C <br />Q (D) 200 gpd Effluent flow rate (existing modular home only), Parcel D <br />Nw 35 mg/L-N Effluent stream concentration <br />A (A,B,C,D) 40 acres Site area, Parcel A, B, C, D <br />Nb 0.17 mg/L-N Concentration of rain <br />0.35 constant Denitrification factor <br />9.42 inches per year Recharge rate of rainfall <br />W (A,B,C) 0.0 inches per year Uniform waste water loading (calculated), Parcels A, B, C <br />W (D) 0.1 inches per year Uniform waste water loading (calculated), Parcel D <br />The following table presents a summary of the assumptions for the nitrate loading <br />calculations for the Site assuming two future houses per parcel, as presented in <br />Plate 19. No construction is planned. <br />LOGE 2062 Page 14