mound systems
A mound system
is characterized by:
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A pretreatment device (usually a septic tank,
conventionally sized)
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Pressure distribution
components (pump chamber, pump and controls,
and low-pressure distribution laterals)
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The "mound"
(Fig. 1). The "mound" consists of:
filter media, an infiltration bed, a distribution
system, and a soil cap and topsoil cover.
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Septic tank effluent, pumped
from the pump chamber to the distribution system in
the infiltration bed flows through the filter media
where it undergoes biological and chemical treatment
and then passes directly into the underlying natural
soil for disposal.
Mounds are an excellent treatment
and disposal choice on appropriate sites, but they are
not very forgiving. Special attention must be given
to siting, design, pre-construction planning, site preparation,
filter media selection, construction and maintenance
of these systems. Quality control throughout the process
cannot be overemphasized.
Mound system design has been developed for those site
conditions in which a two-foot vertical separation can
not be maintained between the bottom of a SSAS and a
restrictive layer of rock, clay, or water table.
To view the
complete Recommended
Standards and Guidance for Performance, Application,
Design, and Operation and Maintenance of the Mound System
you may follow the following links:
Mound
Systems
(Effective Date: February 15, 2000) - in Adobe Acrobat
Format.
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