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...� r <br /> March 2, 2006 <br /> NOA Project Number:E06006A <br /> Page 2 <br /> Table 2. <br /> Summary of Nitrate Mass Balance Analysis. <br /> Result Acres Average Daily Effluent Concen- Leachfield Deep Percolation of <br /> (Nc) * (A) Flow(Q) (Table 1) tration(Nw) Denitrifi- Rainfall (R) <br /> (mg/L-N) (gpd) (mg/L-N) cation(d) (Plate 10) (in.) <br /> 4.6 14.32 911.1 60 10% 11.68 <br /> * Maximum contaminant level(MCL) for nitrate in drinking water is 10 mg/L-N. <br /> Based on these changes you requested, our conclusions remain unchanged. The resulting Nc <br /> increased from 4.4 to 4.6 mg/L-N. <br /> If you have any questions, please do not hesitate to call. <br /> Best Regards, COY <br /> W .No. 2151 ti A <br /> avid Welch, Principal Geologist CERTmm • <br /> CEG-2151, CHG-653, GP-1049 ' ENGNEERWG <br /> GEOLOGtiST �Q <br /> 4� <br /> OF CAL��O <br /> attachment: NL Calculation Sheet <br /> cc: Maria Del Rio, 9103 S. Airport Way, Stockton, CA 95231 <br /> Y <br />