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'Mr.George'Rose <br /> March 1,2002 a� <br /> Page 3 <br /> Table 3. <br /> i <br /> Summary of Nitrate Mass Balance Analysis <br /> Quantity *Result: DenitrificationDeep Rain Waste Smallest Rain <br /> 'of Nitrate Factor' Percolation Level to Parcel Concen.N' <br /> Effluent 'Concen.N Septic Size(ac) <br /> Tank 2 <br /> Primary 5.5 mg/I-N 25% 6.79 inches 45 mg/1-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/1 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/1-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 Finnemore Nc value for the project is less than 10 mg/L- <br /> N-for <br /> g/L-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 groundwater <br /> above 10=mg/L-N. This'opinion is based on this calculation and related workin the area <br /> completed for Mr. Rose involving LA-01-03, LA-01-04, LA-01-41, and MS-01133. We <br /> recommend that the use of a standard septic systema with leach lines and seepage pits. The septic <br /> system should be constructed in accordance with the SJC PHS-EHD Sewage Standards. <br /> r <br />