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Mr.Raymond Vaz <br /> December 14,2001 u <br /> Page 5 <br /> septic waste is normally considered to be 45 mg/L-N.2 <br /> Table 1. <br /> Total Estimated Effluent. <br /> (see worksheets in Appendix for calculations) <br /> Category Quantity Maximum Daily effluent quantity for each analysis <br /> Occupancy <br /> Main 75 5 people 75 gallons/day/person x 5 people=375 gallons/day <br /> Residence gallons/day/person <br /> With 75 Additional <br /> Second gallons/day/person 3 people 75 gallons/day/person x 8 people=600 gallons/day <br /> Dwelling (3+5=8) <br /> Unit <br /> Though it is possible that eight(8)persons may live together on each parcel, over the <br /> long term, that circumstance is probably unlikely. The nitrate loading analysis assumes the <br /> greatest possible impact therefore the quantity of 600 gallons per day per parcel which reflects <br /> eight(8)persons was used for the analysis. <br /> Table 2 presents a summary of the nitrate loading analysis (see Plates 1 & 2). <br /> Table 2. <br /> Summary of Nitrate.Mass Balance Analysis. <br /> Quantity *Result: Denitrification Deep Rain Waste Parcel Rain <br /> of Nitrate FactorPercol- Level to Size Concentrat- <br /> Effluent Concentration ation Septic (ac) ion ' <br /> Tank=* <br /> Primary Residence 9.4 mg/I-N 25% 2.12 inches 45 mg/1-N 10 0.17 mg/1-N <br /> and Second <br /> Dwelling Unit <br /> *Note:Maximum drinking water standard for Nitrate is 10 mg/L-N(45 mg/L as NO3). <br /> Z Otis,R.J.,Boyle,W.C., 1980,Design manual,onsite wastewater treatment and disposal systems:U.S. <br /> Environmental Protection Agency,EPA 625/1-80-012. (See page 100,table 6-1). <br /> �OF9S0 <br /> • 1 <br /> O - <br /> 7 <br /> ,,SOL\ <br />