Sand and silt and lime had washed into underground tanks at a water treatment works. The works were being refurbished and the initial scope of works was to remove a film of manganese from the tank walls. The sand and silt had choked the pumping system and the levels could not be brought down.
Kilbride operatives isolated the tank and removed the excess liquor which could be decanted into an adjacent system within the works. Adopting specialist entry procedures with full breathing apparatus rescue equipment, the silt could then be removed using specialist suction vehicles. As the licensed disposal site for the works was 20 miles away a suction loader was used to draw the waste into slave tankers operating a shuttle service. It was then possible to address the initial scope of work using specialist man entry and high-pressure water jetting into suction tankers. On analysing the waste from this operation a third location for disposal was required.