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Lisa Medina <br /> July 15,2003 <br /> Page 2 <br /> The following table presents the revised nitrate loading calculation: <br /> Table 1. <br /> Summary of Nitrate Mass Balance Analysis. <br /> z <br /> z w y <br /> I _ r <br /> � �' �' W o = •� u � o <br /> dd O' oCdn zU <br /> z .. v <br /> 2.0 20.72 375 35.00 15 6.84 1.0 <br /> *Note:Maximum contaminate level(MCL)for Nitrate is 10 mg/LN and 45 mg/L as NO,. <br /> The water well was retested for nitrate on April 7, 2003. Please see the attached letter describing <br /> the retest. Based on the assumptions and limitations of the nitrate loading calculation, our office <br /> believes the proposed septic use will not result in a long term buildup of nitrate above 10 mg/L-N <br /> in the ground water. <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 /> !4 SOC Best Regards, <br /> �0F p NE ANDERSON &ASSOC., INC. <br /> Ir No. 2i 51CEATI y � <br /> ENGINEERING • David J. Welch, M.Sc., Senior Geologist <br /> N9 <br /> GEOLOGIST CEG-2151, CHG-653 <br /> + OF CAL�FO <br /> attachments: Plate 1, eep percolation of rain water <br /> Plate 2,Nitrate Mass Balance Calculation <br /> Letter dated May 8, 2003 <br /> Septic System Calculation, Associated Engineering, Modesto <br /> I <br /> f <br /> a M <br /> Y '• <br /> O � <br /> r <br /> *SSpG♦ <br />