REPAIR/MAINT/IMPV OF WATER SUPPLY INSTALLATIONS, BLDG, STORAGE TANKS, DISTRIBUTION MAINS AND ALLIED WORK AT JALAPAHAR, TA, BOGRA AREA UNDER AGE (I) DARJEELING

Amount

Excavation in trenches n.exc 1.5m wide and n.exc 1.5 m in depth for foundation etc or for shafts, wells, cesspits, manholes, pier holes etc n.exc 10 sqm on plan and n.exc 1.5m in depth and getting out in soft/loose soil complete all as per specified and as directed by Engineer-in-charge.

Returning, filling in, including spreading, leveling, watering and well ramming in layers n exc 25cm complete all as per specified and as directed by Engineer-in-charge.

Removing excavated material not exc. 50 m & depositing where directed at a level not exc. 1.5 m above starting point complete all as per specified and as directed by Engineer-in-charge.

Taking out old existing galvanised iron water mains 20 mm bore (including all fittings) with spigot and socket ends and fittings for re-use in the work and removing unserviceable pipes and fittings from site complete all as per specified and as directed by Engineer-in-charge.

All as per serial item No.04 above but for pipe of size 25 mm.

All as per serial item No.04 above but for pipe of size 40 mm.

All as per serial item No.04 above but for pipe of size 50 mm.

All as per serial item No.04 above but for pipe of size 80 mm.

Refixing of 20 mm bore old steel tubing and connection in new or old position including cutting threads if required, fittings with old/new bends, elbows, socket, nipple, tapers, and reducers etc as per site requirement and laid in trenches or fixed to walls etc. and testing for leakages, complete all as per specified and as directed by Engineer-in-charge.

All as per serial item No.09 above but for pipe of size 25 mm.

All as per serial item No.09 above but for pipe of size 40 mm.

All as per serial item No.09 above but for pipe of size 50 mm.

All as per serial item No.09 above but for pipe of size 80 mm.

Supply and laying 20 mm bore steel water tubing GI medium grade, in old/new position or in place of PVC/PPR pipe as per site requirement with all fitting, laid in trenches or floors, walls and ceilings and testing for leakages, complete all as per specified and as directed by Engineer-in-charge.

All as per serial item No. 14 above but for pipe of size 25 mm.

All as per serial item No. 14 above but for pipe of size 40 mm.

All as per serial item No. 14 above but for pipe of size 50 mm.

All as per serial item No. 14 above but for pipe of size 80 mm.

Supply and fix in repairs of stop valve, cast copper alloy screwed down, high pressure with crutch or butterfly handle screwed both ends of size 20 mm bore, complete all as specified and directed by Engineer-in-Charge.

All as per serial item No. 19 above but for stop valve of size 25 mm.

All as per serial item No. 19 above but for stop valve of size 40 mm.

All as per serial item No. 19 above but for stop valve of size 50 mm.

M&L for Cleaning of UG/semi UG/OH RCC sump of capacity 2 to 3 KL throughly removing mud, grits, vegitation etc. from the sump inner and outer side by following method: - (a) Drain out the water by using exist valve/high capacity dewatering system. (b) Cleaning inside of the tank by using TERBACK G10 and scrubbing the wall of the tanks. (c) Fresh water cleaning by high speed jet pump. (d) First Bacteria Screening is sterilization by using TERBAC G5 (e) Cleaning the floor of the water tank by heavy duty industrial vacuum cleaner (f) Second Bacteria Screening is sterilization by using Ultraviolet ray (g) Third Bacteria Screening is sterilization by using TERBAC G65 (h) Cleaning of outer side by removing scales, vegitables, moss etc as directed

All as per serial item No. 23 above but for capacity of 4 to 5 KL.

S&F in repair or in new position cast iron sluice Valve PN 1.6, ISI marked of size 80 mm bore confirming to IS 14846-2000, flanged ends drilled having steel spindle with cast iron wheel at top complete with nuts, bolts, washers and gaskets or necessary fittings to control water flow in 80mm pipeline, complete all as specified and as directed by Engineer-in-charge.

M&L for cleaning existing reinforcement with wire brush/rotary wire brush to make surface free from rust scales, loose material, dirt etc complete and applying two coats of alkaline rust converting primer Sika Rust Off 100 or euivalent product of any other make as approved by CEEC/E-in-C branch with brush on the existing rebar for complete wetting of rusted metal surface and allowed to react it for 16-24 hours. After 24 hours, a white layer will appear which will protect further corrosion of metal / steel for about 5-7 days including surface preparation. Before applying protective coating, the surface should be wire brushed and thoroughly cleaned for dust with dry cloth, complete all as specified and as directed by Engineer-in-charge. Note: Work to be executed by the authorised applicator of manufacturer only. Mild steel surfaces shall be pre-treated by removing loose scale from the surface complete all as specified and directed.

M&L for application of Ferrogard-903 of Sika or euivalent product of any other make as approved by CEEC/E-in-C branch as passivator/ Anti-corrosion coating to the steel reinforcement shall be applied. The material shall be two component, cement based polymer modified two component coating for corrosion protection. The material shall be prepacked and ready to use. It shall be fully compatible with reinstatement methods adopted. This shall include surface preparation and errection of steel porps as required for the application, complete all as specified and as directed by Engineer-in-charge. Note: Work to be executed by the authorised applicator of manufacturer only. The thickness of coating shall not be less than 150 microns.

M&L for applying two coats pf Sikagard 67 or euivalent product of any other make as approved by CEEC/E-in-C branch, a water based epoxy coating certified for portable water on all over the concrete surface from inside. Apply the first coat by brush allow it to dry for 6-8 hrs and then apply 2nd coat and allow it to cure complete for 24 hrs. The coating shall be applied using brush application. The Thickness after two coating should not be less than 500 microns, complete all as specified and as directed by Engineer-in-charge.

S&F plastic cylindrical sealed disposable sanitiser refill containing Chlorine with arrangement for controlled release of disinfectant in water, suitable for stequa dosing refill pack AE 411 refill dosing system with following indication/ specifications- (a) Replacement indication: visual & weight variation. (b) Water contact orifice design: Sealed when dry, exposed upon immersion. (c) Operation type: Non-contact, non-inhalatory. (d) Cylinder dia: 2.5 inches ± 0.5 inches (e) Cylinder height: Minimum 10.0 inches ± 0.5 inches complete all as specified and directed.

Taking out old unserviceable/corroded portion MS sheet cover/ bottom plate/ top plate of MS tank of any size and shape and thickness 3-4mm replace or fix over existing MS sheet duly welded continuously to rectify leakages and fixed to suitable equal angle frame if required at site, complete all as specified and as directed by Engineer-in-charge. Note - Payment shall be made as per actual weight of material.

M&L for applying one coat of synthetic enamel paint including preperation of old painted steel surfaces, complete all as specified and as directed by Engineer-in-charge.

M&L for two coats painting of pipeline by using red/yellow/ sky blue synthetic enamel paint after scrapping / cleaning over old painted existing surface of any description, n.exc 10cm in width or girth when uncon nected with other painting or when painted in a different tint, complete all as specified and as directed by Engineer-in-charge.

Demolition of unreinforced cement concrete in ground floors and pavings nexc 15 cm thickness (below or above ground level) complete all as specified and as directed by Engineer-in-charge.

M&L for hardcore of guage not exc. 63mm deposited, spread and levelled in layers not exc. 15 cm thick, watered and rammed to a true surface of broken stone or boulders, complete all as per specified and as directed by Engineer-in-charge.

M&L for PCC (1:4:8) type D2 ( using 40mm graded crushed stone aggregate) as in foundation, filling and mass concrete complete all as per specified and as directed by Engineer-in-charge.

M&L for brick work with fly ash bricks, straight or curved on plan exc 6m mean radius, built in in CM (1:6), complete all as specified and as directed by Engineer-in-charge.

M&L rendering 15 mm thick on fair faces of brickwork in cement mortar 1:4 finishing even and smooth without using extra cement, complete all as specified and as directed by Engineer-in-charge.

M&L for brick work with flyash bricks with honeycomb walling built in CM 1:6, complete all as specified and as directed by Engineer-in-charge.

M&L for preparing newly plastered surfaces of walls and applying two coats of white wash complete all as specified and as directed by Engineer-in-charge.

S&F rotational moulded polyethylene water storage tanks double layered ISI Marked (cylindrical, vertical with closed top) of 1000 Ltrs capacity hoisted and fixed in position all as specified and directedin SSR Pt I.

S&F rotational moulded polyethylene water storage tanks double layered ISI Marked (cylindrical, vertical with closed top) of 2000 Ltrs capacity hoisted and fixed in position all as specified and directedin SSR Pt I. Note:- 1. The contract sum shall be calculated by deducting the amount shown in Credit Schedule attached to this tender, from total amount of Schedule 'A'/BOQ. 2. For Serial Item No. 26 to 28 - The firm/Contractor and the authorised applicator must provide warranty of 10 years for their work against the above mentioned serial item Nos.

Darjeeling Enterprises (BID ID -3501843)