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Mound
Description:
A mound consists of an elevated drainfield bed installed in a large sand berm.
The pressure drainfield in the mound consists of a network of small diamete
pipes. Effluent is pumped to the pipes under pressure and a manifold is used to
split the flow evenly between multiple lines. The effluent is sprayed out of the
pipes through a series of small holes
fo
r treatment.
Function:
The function of the mound is to clean the wastewater to a high level before
passing it into the underlying soil. The mound sand provides an oxygen-rich
surface area fo
r treatment. Microbes consume most pollution out of the water as
it
flows through to the underlying original soil for dispersal.
M
aintenance:
• Mounds should be checked every 3 years by a certified O&M provider.
Homeowners should check the system annually.
• Check observation ports for ponding water.
• Have laterals flushed as needed.
• Clear mound of large vegetation & ensure ports are
• Ensure the mound's shape is maintained. Plant grass, etc. to keep sand
sloughing. DO NOT FILL around mound to make it level.
• Check surface of mound for soggy spots or breakouts.
• See Sections 1 & 2 for more information on protecting your drainfield.
EDGE OF
MOUND
ORIGINAL GROUND LEVEL
, then it moves down through the filter sand
CLEANOUT &
OBSERVATION PORT
LATERAL
LINE
- 52 -
accessible.
FINISHED MOUND SURFACE
DRAINFIELD TRENCH
FILTER SAND
r
from
IN
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