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s : <br /> formation. Although the hydraulic conductivity test indicates a theoretical application rate <br /> of 3.0 gals/ftZ/day, 0.25 gals/ft'/day is a safety factor of 12 and therefore, conservative. As <br /> noted above, if there are three leachline trenches for both the north and south leachfields for <br /> a total of six trenches, and only one sq ft on each side of the leachline trench will accept <br /> effluent (this excludes the floor of the trench for a safety factor),then there will be: 200 sq <br /> ft/trench x 6 trenches total = 1,200 sq ft of application area. If the LTAR is 0.25 <br /> gals/ft'/day, then the trench sidewalls should accept: 1,200 ft` x 0.25 gals/ft2/day = 300 <br /> gallons/day. In Section C above, 270 gallons/day was used in the calculations (includes a <br /> safety factor of 1.5). <br /> 3.) The leachfield area calculated from the lineal foot required as calculated in Section 8.6 of <br /> the Sewage Standards: 2000 gals BTC +270 gals ADF = 2270 CTC x 0.25 = 568 lineal <br /> feet of leachline. Six hundred lineal feet is proposed:, <br /> It is important to note that all septic systems have a lifespan. This lifespan is dependant on <br /> several factors and is therefore difficult to determine. It is imperative that a 50% replacement <br /> area be designated within the property boundaries, which would be directly north of the north <br /> leachfield and directly south of the south leachfield. <br /> As described above in Section III B, another source of nitrate loading can be from <br /> lawns/landscaping/gardens, which is estimated to be 24% and could be significantly higher. It is . <br /> recommended to use "slow-release" nitrogen fertilizers, if any, to reduce nitrate Ioading from <br /> these areas. <br /> Page -10- <br /> Nafley Ag Research <br />