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Using Industrial Hydraulics | Applications of Computer-Aided Manufacturing |
.... Location Individual sewage disposal requires finding an appropriate location on the site to place all of the system components, especially the drain field, which takes a considerable amount of area. Typically local health agencies also sets minimum distances for the location of the various parts of the OSST system; For example, the septic tank must be a minimum of 50 ft (15 m) from any well or suction line. Minimum clearance and setback distance requirements for OSST system components are shown in tbl.7. These distances greatly reduce the danger of contaminating drinking water if leaks should occur in the tank or pipes (lines). Many local codes require longer distances and therefore regulations must be reviewed for a specific building site. As illustrated in Exercises 1 and 2, high percolation rates (i.e., more minutes per inch) result in a larger area requirement for the drainage field; that is, a site with poor soil percolation will require a larger drainage field area in comparison to a site with good soil percolation. A large area drainage field may not fit on a small site. A substitute drainage system such as the elevated sand mound or subsurface sand filter system may reduce drainage area requirements, but will likely increase system costs. Installation Typically, a backhoe will be needed to excavate holes for the septic tank or seepage pits and any trenches for distribution piping and disposal fields. In a community OSST system, a trench must be dug from the building to the community line. The final elevation of the two must be checked to ascertain the sewage will flow properly.Prev: DESIGN EXAMPLE OF AN INDIVIDUAL OSST SYSTEM Next: GRAY WATER REUSE SYSTEMS |