WBMAD/GM/PW/NIT-27/2025-26/35

Labour for boring tube well of required dia by water jet system through any type of soil strata including hire and labour charges for boring pipes, scaffolding, tools and plants as necessary and taking out them and lowering pipes ,strainers blind pipe etc. and fitting and fixing the same complete including bucket washing fixing of tube well head in position and other related incidental works in the connection .The tube well should have a minimum 50 mm gap in between the out side of the tube well pipe and bore. (i) 40 mm dia boring.

(ii) 100 mm dia boring, Item 1/d/ii

Supply of PVC pipes & fittings (medium duty) confirming to ASTMD – 1785 & threaded to match G.I pipes as per is 1239 (part-1). (a) 40 mm dia. Pipe

(b) 100 mm dia. pipe

Supplying high density polythene strainer of approved Make with adopter confirming to each specification (a) 40 mm dia

Supply of G.I pipe of TATA (medium quality) including necessary sockets. 100mm dia. Pipe.

Supplying , fitting and fixing steel Plug cutter pece upto 450 mm long with sockets.40 mm dia.

Supply of fitting fixing PVC . reducing socket 100 mm x 40mm dia

Construction of masonry platform of size (1.5mx1.5mx0.75m hight as per departmental drawing

Packing the annuler space outside the outside the tube well pipe &strainer and the bore hole withpost of size washed gravel of approved quality having size from 2mm to 5mm or size approved by the EIC.incl.cost of all materials, labour and equipments complete.

Supply of India Mark- II Hand pump complete set with all accessories of approved brand as per direction of E.I.C.

Collection of water samples and deposited at departmental Laboratcry for water quality testing as per direction of E.I.C.

Digging earth in any soil including mixed soil but excluding moorum, laterite sand stone or any other hard stone including spreading or stacking the spoils within a lead of 75 metres as directed bailing out water upto 1 metre depth, shoring etc., when and if required and back filling with fine sand (including cost of sand) on completion of steining works. A) R.C.C. Ring Well i) 1.2 metre diameter of digging for 0.9 metre internal diameter of well ring. a) Upto 3 metre below G.L.

R.C.C. well ring made with cement concrete 1:1.5:3 with stone chips and 0.80% reinforcement (including the cost of shuttering and reinforcement) cast at site fitted and fixed in position after proper curing true to plumb in the well including jointing with cement mortar 1:2 complete as per direction. a) 65 mm thick and 0.9 metre internal dia cement for joint filling-4 kg/meter