Fact Sheet

Elevated Sand Mound Pipe Disposal System


Characteristics

mound1a.jpg - 4.5 K
    20 - 47 inches to the limiting zone
    0 - 120 mpi percolation rate
    mpi = minutes per inch
    Slopes-
        For rates slower than 60 mpi, 0 - 6%
        For rates faster than 60 mpi, 0 - 1 2%
    Routinely lnstalled 24inches above grade to 3 inches below grade and covered with 18 inches of fill. Finished heights range from 27 inches to 54 inches above grade. Replacement systems may vary to heights above 54 inches.

System Components

    Septic tank
    Dosing chamber
    Sewage pump and float system
    Drainfield
    Alarm system

Care and Maintenance

    This system is pressurized by a sewage pump. The pump sends effluent to the drainfield a minimum of three times a day with resting periods in between to allow aerobic treatment of the effluent. If the pump or float system should fail, the alarm will turn on signaling the failure. Contact a wastehauler to pump the septic tank and the dosing chamber. Then contact your installer to inspect and correct the problem.
    The alarm panel should be checked and tested regularly.
    Pump maintenance should follow the manufacturer's recommendations.
    Plant grass over the entire mound to prevent erosion of the sideslopes. Stabilize the sideslopes with aggregate (straw/mulch) until the grass is established.
    Deep rooted trees and shrubs should be kept a minimum of ten feet away.
    A properly designed and constructed mound should operate satisfactorily with care and routine maintenance as described in this brochure. Contact your installer if you have specific concerns.

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© 2002 Delaware Department of
Natural Resources and Environmental Control
89 Kings Hwy
Dover, DE 19901

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