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. <br />�YS T: 2D, SIGN <br />1. Percolation Rate. Tune of System. <br />18.5 minutes per ir.. ., jhallow Trench system. <br />2. Proposed Flow 'late <br />4 bedroomsC:lrO G.P.D. = 600 G.P.D. <br />3. Soil Treatment Area Required <br />For 16-30 percolation rate use 1.6t x 600 r=1000 Sq. F <br />4• <br />4 trenches 2.1, feet wide acid 100 e-of <br />feet longue 1000 Sq. Ft. <br />_ <br />1 trenches should have 3 feet of.aeperation from the water <br />tal,l.e so they would vary from ground level to 1 foot deep <br />unless the interceptor drain lowers the water table. <br />5. Drainfield Rock Required <br />37 cubic yards are required for 1000 sq. ft. of drainfield <br />with 6 inches below the 1� inch distribution pipe and 2 inches <br />over the top of the pipe. <br />6. Septic Tanks <br />Two tanks are required with each having a capacity of at <br />leant 1000 gallons. In addition, depending on the house <br />elevation, It might be necessary to have a separate pumping <br />compartment and pwnp to reach the drainfield area. <br />