Some soil types are unsuitable for conventional septic systems.
However, alternative systems such as the mound system can
overcome soil and site conditions which might prevent the
use of basic septic systems.
A mound system
consists of a septic tank, dosing chamber, and elevated absorption
mound. The dosing chamber is an additional tank that receives
effluent from the septic tank. The effluent is held in this
chamber and then periodically pumped into the absorption mound.
Because the soil in the mound receives the effluent evenly
and over set intervals, it is much less likely to become overly
wet than a traditional system. When the soil in the drainage
area of a septic system becomes waterlogged, it loses some
of its ability to treat the effluent. Consequently, a mound
system works more effectively and has a longer life span than
a conventional system. Furthermore, because the mound is constructed
over the original ground level of the drainage area, it adds
additional vertical filtering capacity to the site.
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