WBMAD/ULB/HM/6526/NIT-2473 Dt-22.12.2025.

Item No. 1 (i) / P - 50/2 (b) Labour for boring through any type of soil for sinking tube well of required dia. with top enlargement by rig boring system (either by reserve circulation or by direct rotary method) including hire charges and labour for rig machine, tools and plants, staging, force pumping set and making arrangement for water required for boring etc. complete and lowering of pipes, strainers, blind pipes etc. complete. (b) For depth upto 250 metre for 150 mm dia. Tube well with top enlargement of 250 mm dia.(upto 50 metre).. (i) First 50 metre

(ii) Next 50 metre

(iii) Next 50 metre

(iv) Rest 150 metre Note: (i) For item no. 2, measurement will be taken below G.L. taking G.L. as zero for payment. (ii) For item no. 1 & 2 for bored depth where no lowering of pipe is involved the corresponding rates would be reduced by 30%.

Item No. 2 / P - 54/18 (iv) Supplying, fitting and fixing G.I. cap at top (iv) 250 mm

Item No. 3 / P - 54/17 Supplying, fitting and fixing heavy type bell mouth reducing socket. (v) 150 mm X 250 mm

Item No. 4 / P - 56/27 Supplying, fitting and fixing 300 mm M.S. housing clamp of approved quality.

Item No. 5 / P - 56/28 Providing 200 mm centre guide. i) With Clamp

Item No. 6 / P - 56/29 Geophysical investigation of the acquifer by electrologging system with all tools and plants as necessary including supply of necessary report.

Item No. 7 / P - 55/24 Packing the annular space between the outside of the tube well pipes & strainers and the bore with pea size washed gravel of approved quality having size from 2 mm to 5 mm or the size approved by the Engineer-incharge including cost of all materials labour and equipment complete.

Item No. 8 / P - 56/25 Packing annular space between the outside of the housing pipe and the bore with puddled clay balls of approved size as per direction of the Engineer-in-charge with cost of all materials and labour complete.

Item No. 9 / P - 55/20 Washing and developing tube well with air compressor pump and engine for 8 (eight) hours continuous pumping per day with necessary arrangements for testing the yield in gallons per hour with 'V' notch including hire and labour charges for all tools and plants and scaffolding as required.

Item No. 10 / P - 56/26 Providing and fixing bell plug as required upto 250 mm (internal) dia. ERWMS pipe including cost of materials and labour complete.

Item No. 11 / P - 55/22 Labour for making arrangement for showing verticality test including the cost for hire charges of tools and plants, scafolding, labour etc. all complete.

Item No. 12 / P - 55/23 Collecting sample of water for bacteriological and chemical test from any depth at any time during execution of work including hire and labour charges for tools and plants and sterilising the equipments, paying all charges and fees, testing etc. complete in all respect as per direction.

Item No. 13 / P - 13/19 ( iii ) Supply of PVC pipes & fittings Schedule 80 (medium duty) conforming to ASTMD - 1785 and threaded to match with GI Pipes as per IS : 1239 (Part - I). (A) PVC Pipes (Dia) 250 mm

Item No. 14 / P - 52/ 7 (b) Supplying, fibre glass reinforced Epoxy resin slotted of 1 mm slot width in 6.1m length of approved make and as per direction of the Engineer - in Charge (b) 150 mm nominal dia (ii) 7.00 mm wall thickness

GST Item (Effect from 01.11.2017) 18 % GST on Estimated Cost of Sl No- 1 to 14

Labour Welfare Cess Item (Effect from 01.11.2017) 1% Labour Welfare Cess on Estmated Cost of Sl No -1 to 15