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ri-RDEN i RCUr F.R:"Y <br />LC: 1, B I.00Y. 3 <br />S AIs L,-YE F DDIT I01\ <br />System Design <br />]. Percolation RLte. "_';-;-e of System. <br />1:7.7 ninute per inch. Sta-:dard System. <br />2. Tror.osed Flow Rate. <br />4 bedromrs 150 G.F.D. is 60C G.P.D. <br />3. Soil Treatment Area Required. <br />600 G.F.D. x 1.67 percolation factor is 1000 sq. ft. <br />4. Size and Number of Trenches. <br />4 trenches 3 feet wide and 85 feet long is 1020 square feet. <br />These trenches would be spaced a minimum of 7.5 feet apart <br />center to center and be no deeper than 1.5 feet in the natural <br />soil. <br />5. Drainfield Rock Required_ <br />55.6 cubic yards of rock is needed to have 12 inches under and <br />2 inches over a 4 inch distribution pipe. <br />6. Sertic Tanks. <br />If the rresent tanks are found to be ;:nacceYtabie, 2 new tanks <br />each of at least 1000 gallons are required, along with a third <br />pumping tank with a pt:.,�*,p. An alarm to warn of pur.p failure mill <br />alsc be needed. <br />0 <br />