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Trash Trap
Description:
Trash traps are under ground-tanks placed in front of ATUs (page 45) that
receive wastewater flowing directly out of a residence, business, etc. They
generally consist of a single-chambered, baffled tank. Access risers allow the
tank to be opened, pumped and checked.
The trash trap may be a completely separate tank from the ATU, or it may be the
fi
rst compartment of a multi-chambered tank with the ATU in another
compartment.
Function:
The trash trap is a primary tank that collects all wastewater coming into the se
system. With the use of baffles in the tank, wastewater is slowed down. This
allows the heavy solids to sink and the lighter ones to float, while a clear zo
forms in the middle. Clarified effluent from this clear zone is then passed on
th
e ATU for treatment.
M
aintenance:
• ATUs must be c
• Check the trash trap whenever the ATU is checke
• Visually inspect the tank annually for damage, leaks, etc.
• See Sections 1 & 2 for more information on protecting your tanks.
IN
FROM
BUILDING
TANK
WALLS
hecked yearly at a minimum by a certified O&M provider.
ACCESS
RISERS
FLOATING SOLIDS
CLEAR ZONE
SETTLED SOLIDS
- 42 -
d and pump when needed.
BAFFLES
ptic
ne
to
OUT TO
ATU
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