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N Omega Vineyard,Phase,I <br /> u Page No. 3 . <br /> Table 2, Computed Effluent Application Factors for Percolation Rates <br /> of Figur e3',Manual of Septic Tank'Prdctice <br /> -PercolationComputed Clear Water Rate;(Equ. Ft'of Absorption Area Effluet t.Application Factor, <br /> Rate,min/in.. 1-1),gallday/ftp of absorption area Req'd Per Bedroom,Fig. 3 [100/(col. l x'col.2)] <br /> 10. 40:8 167 1.5% <br /> 20 20.4' ' 214 -2.3% <br /> k .30 13.6 250 2.0% ' .. <br /> 40 10.2 284 3.5% <br /> . 50.-, 8.2 311 3.9% <br /> F7 <br /> 60 - 6.8 - 329 4.5% . <br /> Itis assumed that the increasing rate of,the application factor as the percolation increases <br /> is due to the increased time that the effluent will be ekposed to the soil-. Consequently, an <br /> application factor of 5.0%was selected for the design percolation rate of-1 00'min/in.. •Although <br /> Figure 3 is limited to 60 minain percolation rate, the main reason for this is the problem of'soil .. <br /> smearing which occurs on the bottom and ,'sides of the leach lines during construction in. <br /> increasingly clay soils. If the trenches are excavated when the subgrade soil is {ie. <br /> winter or,spring) and/or the sides And bottom are"racked" or scarified rior to avel installation, . <br /> dien higher percolation rates'can be designed'for " <br /> For the design percolation rate of 100 min/in, the'capacity for lineal'fooi of leach line was <br /> computed using equation(I-1) '.'. <br /> A(6.23) (78.5)(6.33) <br /> R rA J (100)(1.20) 4'1 gal/day/ft' absorption area _ <br /> Assuming a 2.0 foot wide shallow leach line has 3.0 ft' of absorption'area per lineal foot <br /> of trench and,.a application facior'of 5.0%,-then the allowable capacity of the proposed shallow <br /> leach lines per foot,of length (C) is as'follows: <br /> Cl -R(3.0)(0105)'=(4.1)(3.0)(0.05) 0.6 gal/day/ft of length <br /> The design'daily effluent flow rate, as computed in'Table,l, is 350 gal/day. It is,proposed . <br /> to utilize two (2), 50 foot long leach lines.with a dry well on.the end'of each.,Based-on the above <br /> computed leach line capacity(C,),Ahe total daily disposal capacity of the two leach lines (C,) is <br /> F <br /> as follows: <br /> . .Cl, =. Cj# and.length of leach lines) 0.6(2.x 50) =-60 gal/day . <br /> Ise, <br />