Operation & Maintenance Manual
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P a g e
3.
INTRODUCTION
The WPL range of sand filters has been designed to treat the treated effluent from sites with population
equivalents in the range of 1 up to 600 persons
Use of the sand filter can achieve BDO and TSS standards better than 10mg/l.
The plant is designed for either above or in ground installation. This installation manual deals only with in
ground installation. Blowers and controls to provide air to the unit are housed in a kiosk adjacent to the
plant. All tanks, covers and kiosk are manufactured in GRP for corrosion resistance and long life.
4.
DELIVERY
4.1 Off-Loading
The purchaser may be responsible for off-loading at the nearest roadway to site that is suitable for heavy
goods vehicles. A minimum height clearance to 16’ 6” (5m) is required. If there are electrical cables
overhead, ensure that there is a means of turning the power off. For off-loading from a lorry mounted
HIAB, there needs to be a firm area for the stabilisers, the total width being a minimum of 15 feet (4.6m).
If the nearest road access for a heavy goods vehicle is not adjacent to the site, it is the responsibility of
the purchaser to arrange transport from the road to the site. If in doubt, contact WPL as soon as possible
with any queries.
Inspect the unit for any damage to the base before placing on the ground and then inspect the sides. The
unit should only be placed on level ground with no sharp stones, bricks etc as they may damage the base
of the unit.
The control panel and blowers should be stored in suitable conditions i.e. dry and condensation f ree.