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Sand-Lined Drainfield
Description:
A sand-lined drainfield consists of a pressure distribution drainfield (page 50
overlaying a thick layer of filter sand, which is laid down first. Sand-lining
provides extra treatment of wastewater on sites where the original soil isn't
suitable (too gravelly), or where extra treatment is required.
Function:
The function of the sand-lined drainfield is to clean the wastewater to a high lev
before passing it into the original soil. The sand creates an oxygen-rich surfa
area for treatment. Microbes consume most pollution out of the water as it
passes through and moves into th
Maintenance:
• Sand-lined drainfields should be checked every 3 years by a certified O&M
provider. Homeowners should check the system a
• Check the observation ports for ponding water.
• Have laterals flushed as needed.
• Clear drainfield of large vegetation & ensure
• Check drainfield area for soggy spots or breakouts.
• See Sections 1 & 2 for more information on protecting
CLEANOUT &
OBSERVATION PORT
LATERAL
LINE
e environment.
ports are accessible.
GROUND SURFACE
DRAINFIELD TRENCH
FILTER SAND
ORIGINAL SOIL
- 48 -
nnually.
your drainfield.
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IN
FROM
HOUSE
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