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`, <br /> L March 19, 2004 <br /> NOA Project Number: E0415A <br /> Page 12 <br /> `° 7.5 Nitrate Loading Scenarios <br /> _ A nitrate loading scenario was performed to determine the impact from the proposed facility. <br /> The scenario utilizes the variables discussed previously which represent the estimated conditions <br /> and uses associated with this project. The following table presents a summary of the nitrate <br /> 101. loading calculation. <br /> Table 7. <br /> Summary of Nitrate Mass Balance Analysis. <br /> Calculation Result Acres Average Effluent Leachfield Deep Percolation <br /> (NC) V (A) Daily Flow Concentration Denitrifi- of Rainfall(R) <br /> (Q)(Table 2) (Nw) cation(d) (Plate 8) <br /> see Plate 9 6.0 m -N 1.43 130 gpd 35 m L-N 25% S.Olin <br /> fto * Maximum contaminant level(MCL)for Nitrate in drinking water is 10 mg/L-N. <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates the proposed development will not cause a build up of nitrate in ground water above 10 <br /> mg/L-N over the long term. <br /> 8.0 CONCLUSIONS AND RECOMMENDATIONS <br /> A satisfactory percolation rate was achieved on the parcel. The soils are suitable for a septic <br /> system with leach lines and seepage pits. The nitrate loading balance was performed and based <br /> on the assumptions used in this report and assumptions of the Hantzshe &Finnemore equation. <br /> The proposed project will not cause a long term buildup of nitrates above 10 mg/L-N in the <br /> ground water. Our recommendations for the project are as follows: <br /> Follow the San Joaquin County Sewage Standards where required. <br /> Utilize a 2,000 gallon septic tank to promote additional denitrification (treatment) of wastewater. <br /> .. <br /> I <br />