04/BSNL/CD/PY/2022-23(Re call)

Amount

Drilling of bore well in all types of soil upto ordinary rock (not requiring blasting) of 300mm dia bore by calyx method (direct rotary and circulation method) by using bentonite slurry, power rotary drill tools, labour for drilling and water required for boring and dressing,packing with pebbles at required depth etc. complete

Supplying and stacking unplasticised PVC medium well casing (CM) pipe (True bore or equivalent) of required dia all complete as directed by Engineer-in-charge.

a) 150m dia (CM) UPVC plain pipe

b) 150m dia (CM) UPVC slotted pipe

Providing and fixing 150mm dia PVC conical end cap all complete as directed by the Engineer-in-charge.

Providing and fixing PVC dummy of 150mm diameter for covering the casing pipe all complete as directed by the Engineer-in-charge.

Developing the borewell with air compressor for a minimum of 2 hours and conducting yield test by 'V' notch method including transporation of tools and plants all complete as direc ted by the Engineer-in-charge.

Collecting water samples from the bore well and getting tested in approved laboratory all complete as directed by the Eng-in-charge.

Providing and fixing Chlorinated Polyvinyl Chloride (CPVC) pipes, having thermal stability for hot & cold water supply, including all CPVC plain & brass threaded fittings, including fixing the pipe with clamps at 1.00 m spacing. This includes jointing of pipes & fittings with one step CPVC solvent cement and testing of joints complete as per direction of Engineer in Charge. : Internal work - Exposed on wall a) 32 mm nominal outer dia. Pipes.