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Project_Name» Page 11 <br /> Our Project Number: LGS080005 <br /> February 28, 2008 <br /> Table 7. <br /> Summary of Nitrate Mass Balance E uation. <br /> Result Average Effluent Leachfield Deep <br /> Parcel (Nc)* Acres(A) Daily Flow Concentration Denitrification Percolation <br /> (mg/L-N) (Q)(gpd) (Nw) (d) of Rainfall <br /> (mg/L-N) (R)(in) <br /> 1 4.9 .49 9.28 85 35% 3.3 <br /> * Maximum contaminant level(MCL)for nitrate in drinking water is 10 mg/L-N. <br /> 2.3.6 Impact of Nitrate Loading to Nearby Water Sources <br /> Since the Site is relatively flat, we do not foresee percolating effluent affecting any surface <br /> water resources. <br /> 2.4 Discussion of Nitrate Loading Results <br /> 2.4.1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates that the proposed development on the proposed parcels should not cause a build up <br /> of nitrates in the aquifer above 10 mg/L-N. <br /> 2.4.2 Methods of Mitigation <br /> Because of the favorable result of the nitrate loading calculation, no mitigation measures are <br /> warranted. <br /> 3.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Our office concludes that the Site is suitable for development with the use of a standard septic <br /> system. All septic system construction should follow the San Joaquin County On-Site <br /> Wastewater Disposal Standards where applicable. <br /> Ground water is estimated to be around 50 to 90 feet below the ground surface in the vicinity <br /> of the Site. No well water sample was analyzed because no well exists on the Site. <br /> 4.0 LIMITATIONS <br /> Our professional services were performed, our findings obtained, and our conclusions proposed <br /> in accordance with generally accepted engineering principles and practices. This warranty is in <br /> lieu of all other warranties either expressed or implied. Test findings and statements of <br /> professional opinion do not constitute a guarantee or warranty, expressed or implied. <br /> 902 Industrial Way•Lodi,CA 95240.209.367.3701 •Fax 209.369.4228 ©2008 Neil O.Anderson&Associates.Inc <br />