Boreline retrieval procedure by hand
1", 1½" & 2" Boreline only. A minimum of three people required.
Please Note. If the Boreline and pump have to be removed while full of water the column will be considerably heavier than empty and it may not be possible to lift it by hand - this must be checked before attempting the lift.
See the full specification table, above, for nominal weights of the Boreline and water column per metre. The addition of pump, cable and accessories weights will give the total weight of the column to be lifted. ( Revised Work Practices Guide for Manual Lifting, published by the National Institute for Occupational Safety and Health (NIOSH) in 1991 recommends a maximum weight to be lifted, under perfect lifting conditions, of 51 pounds or 23 kilograms.)
Stop the pump and disconnect the electrical supply & discharge pipe-work.
Whilst two people lift the headworks off the borehole the third should clamp the riser with the Boreline clamp. Do not clamp the cable. Lower the assembly so that the clamp rests on the casing and takes the weight of the pump & riser. The headworks can then be lowered to the ground - there is no need to disconnect it from the Boreline.
Raise the rest of the Boreline from the borehole ( being careful not to damage it on the edge of the casing ) until the pump is retrieved.