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Mr.George Rose <br /> March 1,2002 <br /> Page 3 <br /> Table 3. <br /> Summary of Nitrate Mass Balance Analysis. <br /> Quantity *Result: Denitrification' .Deep Rain Waste 'Smallest Rain <br /> of Nitrate FactorPercolation Level to Parcel Concen.N' <br /> Effluent Concen.N Septic Size(ac) <br /> Tank'-* <br /> Primary 5"5 mg/1-N 25% 6.79 inches. 45 mg/l-N '2.10 .0;17 mg/1-N <br /> Residence,4 <br /> people,200 . <br /> gals/day <br /> (Plate 3) <br /> Second Dwelling 8.5 mg/1-N 25% 6.79 inches 45 mg/l-,N 2.10 0.17 mg/1-N <br /> Unit,3 additional <br /> people,350. <br /> gals/day <br /> (Plate 4) <br /> *Note:Maximum drinking water standard for Nitrate'is 10 mg/L-N(45 mg/L as NO,) . <br /> Attached as Plates 3 and 4 are the worksheets showing the calculation fora single <br /> residence and a residence with a second dwelling unit. <br /> In summary, the Hantzsche and Finne.more Nc value for the project is less than 10 mg/L- <br /> N,for both scenarios. Based on this analysis-and assumptions presented, a single residence <br /> combined with a.second dwelling unit should not cause a build up of nitrates in the ground water, <br /> above 10'mg/L-N: This opinion is based on this calculation and related work in the area <br /> completed for Mr. Rose involving LA-01-03, LA-01-04, LA-01-41, and MS-01=33. We <br /> recommend that the use of a standard septic system with leach lines and seepage.pits. The septic <br /> systern should be constructed in accordance with the SJC PHS-EHD Sewage Standards. <br />