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11
J. WET HOLE
INSTALLATION
CAUTION
Never allow an empty tank to remain in a wet
hole, or a dry hole that may become wet unless
anchoring and backfilling have been completed.
Failure to anchor and backfill may damage the
tank or surrounding property.
Firstly make site preparation as per section B.
Pump the water from the hole to maintain minimum
water level. Add a minimum of 300mm of well-placed
backfill material (MUST be crushed gravel) to the hole,
and level the bed to assure uniform bottom support for
the tank. Position the tank in the hole.
Partially ballast tank using water until it settles firmly
on the prepared bed. Ballast level in a tank must never
exceed water level in hole during installation. Use only
enough ballast to sink the tank.
One tank is level and ballasted, carefully place
concrete ballast as per section C then processed to
sections D, E (if applicable), F, G and H.
!
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