REPAIR / MAINT / IMPV OF PIPE LINE, VALVES, VALVE PITS, WATER SUPPLY INSTALLATION, SUPPLY OF CHEMICAL AND CHLORINATION SYSTEM ETC AT LEBONG UNDER AGE(I) DARJEELING

Amount

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, under groung cables etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft/loose soil, complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cm. in soft/loose soil, complete all as specified and as directed.

Removal of surplus excavated soils to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.50m above the starting point, complete all as specified and as directed.

Taking up or down steel tubing and connections, including cleaning the pipes free from scaling for for re-fixing or removal to store with all fittings and connections, complete all as specified and as directed of the following sizes :-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Refixing of 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 on wall etc and testing for leakages, complete all as specified and directed for the following sizes:-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Supply and laying steel water tubing GI medium grade as in old/new position or in place of PVC/PPR pipe as per site requirement with all fitting, laid in trenches or fixed on wall etc and testing for leakages, complete all as specified and directed for the following sizes:-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Supply and fix in repairs of unserviceable gun metal, globe or gate valves, with iron wheel head, screwed both ends for iron pipes or fixed in new position as per site requirement, complete all as specified and directed for the following sizes:-

20mm dia bore

25mm dia bore

40mm dia bore

50mm dia bore

80mm dia bore

S&F in replacement of unserviceable ball brass valves / float valves, high pressure with polythene float and flynut alongwith socket / reducer of suitable size, screwed for iron pipe or brass ferrule and fixed, complete all as specified and directed for the following sizes:-

20mm dia bore

25mm dia bore

M&L for Cleaning of semi under ground RCC sump of capacity 200000 gallons throughly removing mud, grits, vegitation etc. from the sump, complete all as specified and directed 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 chemical 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) After satisfactory completion Engr-in-Charge shall issue certificate and date of cleaning shall be written on the sump.

S&F in replacement chlorination chemical refill dosing chember for dosing of chlorination chemical in refill packeges incl dismantlig complete all as specified and as directed. Make: Daclibac -ADS pro dosing refill item No 250723 AP and with 411 AE Refill set-25 or equvalent of RMCO/ Milton Ray/ Approved make.

Repairing of sluice valves 80mm raising / non raising types after dismentling the same by checking stem, gate/ disc, stuffing box, Seat, Gland packing, gland bush, gland falange, nutbolts, gasket, packing material, threading, welding as required for proper functioning of Sluice valves, complete all as specified and directed. Note: Quoted rates inclusive of worn out materials which are required to be replace above mentioned items like stem, gate/ disc, Seat stuffing box Gland packing, gland bush, gland falange, nutbolts, gasket, packing materia etc. as required for proper functioning of the valves.

Repair/rectification of leakages to water supply distribution lines 20mm/25mm bore GI/PPR tubing with provision of necessary excavation,cutting of hard standing, returning and filling if/ as required at site, tightening of loose joints of union, elbow, sockets etc, threading if required including replacement of GI unions/sockets/nipples as required at site, complete all as specified and directed.

All as per item No 13.00 above but for GI tubing 40mm bore to 50/63mm bore

All as per item No 13.00 here-in-before but for GI tubing 80mm bore.

Preparation of old painted surface of brick/stone/plaster surface plain or moulded, n exc 10cm width or girth and painting by one coat of 1st quality Synthetic enamelled paint, over a coat of priming paint plaster coat, complete all as specified and directed.

Demolition of cement concrete (unreinforced) in ground floor and pavings not exc 15 cm thickness (below or above ground level), complete all as specified and directed.

M&L for hardcore using broken stone or boulders of gauge n exc. 63mm, deposited, spread and levelled in layers n exc. 15 cm thick, watered and rammed to a true surface, complete all as specified and directed.

M&L for plain cement concrete (1:4:8), type D2 (using 40 mm graded stone aggregates) as in foundation, filling and mass concrete and staging of MS tank/PVC storage tank box repair to floor, path including necessary form work and fair finishing without using extra cement, complete all as specified and directed.

S&F of rotational moulded polyethylene water storage tanks of capacity 2000 litres (cylindrical vertical with closed top) hoisted and fixed in position all as specified in SSR Part-l and directed.

M&L for brickwork with fly ash bricks (old size bricks), in one brick thick honey-comb walling, built in cement mortar(1:6), complete all as specified and directed.

M&L for brickwork with fly ash bricks (old size bricks), straight or curved on plan exc 6m mean radius, built in cement mortar(1:6), complete all as specified and directed.

M&L for rendering 15mm thick in cement mortar (1:4) on fair faces of brick work or concrete surfaces, finished even and smooth (without using extra lime or cement), complete all as specified and directed.

Note 1:- (Applicable for all parts/items) : The bidders/contractors are advised to read tender document, all drawings & all corrigendum / amendments and general condition of contracts before entry / quoting the rates. Note 2:-The contract sum shall be arrived at after deducting amount of schedule of credit from the total quoted amount.

RAI CONSTRUCTION (BID ID -3116520)

JALAPAHAR HARDWARE (BID ID -3117404)

YADAV CHETTRI (BID ID -3117807)

Darjeeling Enterprises (BID ID -3116737)

TSHERING WANGYAL BHUTIA (BID ID -3116809)