Trench Drains and Hopper Bottom Pits are part of a good
wash pad design and are an essential component of an effective wash and water
recovery system. Common sense recommendations with most stationary wash pad
- An adequately sized Wash Pad
-- Good design allows for a minimum of 10' clearance all around the largest
vehicle to be washed on the wash pad.
- An Equipment Pad should also
be adequately sized to allow for the proper layout of all wash and water
recovery equipment and should be elevated off the wash pad 4-6" to keep
equipment out of standing water.
- To facilitate dirt, silt and debris "drop-out" a
Trench Drain is highly recommended. Most
applications require the Trench Drain to be no more that 6-12" deep and
12-18" wide. Angle Iron Dams positioned 5-6' apart and located on
the floor of the trench drain are recommended to facilitate dirt and silt
drop out in the trench.
- A Hopper Bottom Pit
is also recommended in the water drainage system. The Hopper Bottom Pit is
used as part of a Sludge Removal System to eliminate sludge from the
pit without costly pumping out.
- Depending on dirt, oil and grease content in the water,
more than one Hopper Bottom Pit or a multi-compartment clarifier may be
Trench and Hopper Bottom Pit