CLEANING OF OH TANKS, UG FRESH WATER SUMPS AND IMPROVEMENT OF UG SUMPS AND OH TANKS AND CONNECTED WORKS AND REPAIR/ REPLACEMENT, MAINT OF CI/GI/DI AND PPR PIPE/ HDPE PIPE LINES AND ALLIED WORK AT INSIDE FW UNDER GE (FW) KOLKATA

Amount

M&L for Cleaning of 3 lakh gallons capacity overhead reservoir (consisting of one inner tank of 4.02 Mtr dia and one outer tank of 9.75 Mtr dia of depth 9.63 Mtr) at a height of 35 Mtr from the ground (Approx), and through 6 stages of cleaning and sterilization consisting of the following stages complete all as specified & directed by the Engr-in-Charge. Location : Power House OHT Cleaning through Agencies:- RAYS CLEANTECH/ INUS WATERTECH/ MS TANK CLEANING

(a). First Stage :- Machanized Dewatering, This first stage consists of emptying water from the tank. A submersible pump is used to drain the tank of excess of water. Removal of water and semi sludge with the help of sludge pump (electric/hydraulic)

(b). Second stage :- Sludge Removal, A sophisticated suction process is used to drain the excess sludge out of tank at a safe place away from tank. Removal of mud, sand and solid particles up to 4 inch size with the hydraulic sludge pump.

(c). Third storage :- High Pressure Cleaning, The tank is then cleaned using high pressure jet machine. The rotary jet is used to clean walls and ceilings, whereas plain jet is used to clean the corners of the tank. The rotary jet acts as scrubber and can clean the most stubborn depositions. Cleaning of floor, walls and ceiling with the help of German made high pressure rotary jet pump having pressure range between 80-180 bars.

(d). Fourth stage :- Vacuum Cleaning, The additional sludge and impurities are then removed by using a industrial vacuum cleaner and are again disposed at a safer place away from the water tank. An industrial vacuum pump is then used to clean the leftover physical impurity from the floor.

(e). Fifth stage :- Antibacterial Spray, after above steps of cleaning, the tank is treated with an antibacterial spray (sodium hypochlorite) on the surface of the wall of the tank to make it completely bacteria free and safe for use. Our use of chemical is just to disinfect the germs and bacteria on the walls and ceiling only.

(f) . Sixth stage - UV Radiation, the water storage tank is then treated with ultra-violet (UV) radiator to make it bacteria free and safe for storing your drinking water. A specially developed UV radiator is used to kill suspended or floating bacteria remaining in the tank.

Note : (i) All T&P, PPE Kit, Transport shall be born by the contractor without any extra cost. (ii) All the cleaning & sterilization staffs should be must under accidental insurance coverage and documentary proof kept on records by Engineer-in-Charge before execution of work. (iii) Date of cleaning of tank should be written on the outer surface of tank in white letter over black background complete as directed.

All as per item No.01 here in before, but of size 2 Lakh Gallon capacity overhead reservoirs consisting of inner & outer tank at a height of 25 Mtr (Approx) from the ground, complete all as directed by the Engr-in-Charge. Location :P-13 Pump House

All as per item No.01 here in before, but of size 1 Lakh gallon capacity overhead reservoirs at a height of 20.0 Mtr from the ground (Approx), complete all as directed by the Engr-in-Charge. Location : Gora bazar OHT

All as per item No.01 here in before, but of size 20000 gallon capacity overhead reservoirs at a height of 15 Mtr from the ground, complete all as directed by the Engr-in-Charge. Location : New RRC pump house OHT & AOI

All as per item No.01 here in before, but of size 10000 gallon capacity overhead reservoirs at a height of 7.5 Mtr from the ground, complete all as directed by the Engr-in-Charge. Location : Pump House No 1 & Ladies Golf

All as per item No.01 here in before, but of size 5000 gallon capacity overhead reservoirs at a height of 35 Mtr (Approx) from the ground, complete all as directed by the Engr-in-Charge. Location : MAP Block A, B, C, 1 & 2

All as per item No.01 here in before, but of size 2 lakh gallon capacity under ground water sump, complete all as directed by the Engr-in-Charge. Location : JCO's MAP Pump house

All as per item No. 01 here in before, but of size 1 Lakh gallon capacity under ground water sump, complete all as directed by the Engr-in-Charge. Location : Water gate, No 3 Pump house (02 Nos), Offrs MAP Pump house, Queens Bk pump House, & MAP OR Accn

All as per item No.01 here in before, but of size 30000 gallon capacity under ground water sump, complete all as directed by the Engr-in-Charge. Location : Dalhousie BK Pump house, AOI Pump House & Sweet water Pump House

All as per item No.01 here in before, but of size 20000 gallon capacity under ground water sump, complete all as directed by the Engr-in-Charge. Location : OD - II Pump House, SO-II Pump House, Command Mess Pump House & New Command Bldg Pump house

All as per item No.01 here in before, but of size 10000 gallon capacity under ground water sump, complete all as directed by the Engr-in-Charge. Location : Horse Riding club P/H, O2 Mess P/H, KP Qtr P/H & New Golf UG Sump

Note for item No 1 to 11 :- 1. After cleaning, the date of cleaning is required to be written, with size of letters / numbers as directed by the Engineer-in-Charge, in white colour paint with a black paint background. 2. Tanks mentioned under Item No. 01 to 04 & 09 shall be cleaned twice during the contract period, once after commencement of work and once before completion of work. Other tanks shall be cleaned once during the contract period unless otherwise directed by Engineer-in-Charge. date of cleaning of tank shall also be recorded in MB against respective item.

M&L Stripping off existing starter panel and replace defective power contactor 3 pole, 415 Volt AC 3 phase type ML-3 with new copper lugs of suitable size and re-assembling of the panel including rectification of fault and safety device, adjustment of time etc complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: SS 90721 or equivalent model in other makes specified in tender

Ditto all as per item No 13 above, but of type ML 2 complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: SS 90701 or equivalent model in other makes specified in tender

Ditto all as per item No 13 above, but of type ML 6 complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: SS 90921 or equivalent model in other makes specified in tender)

Ditto all as per item No 13 above, but of type MNX 95 complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: CS94136 or equivalent model in other makes specified in tender

Ditto all as per item No 13 above, but of type MNX 32 suitable for 415 Volts, complete as directed by the Engr-in-Charge. (Make: L&T, Cat No : CS94111 or equivalent model in other makes specified in tender

Ditto all as per item No 13 above, but of type MNX 25 suitable for 415 Volts, complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: CS94110 or equivalent model in other makes specified in tender

Ditto all as per item No 13 above, but of type MNX 12 suitable for 415 Volts, complete as directed by the Engr-in-Charge. (Make : L&T, Cat No: CS94108/09 or equivalent model in other makes specified in tender

S&F Thermal over load relay for ML-2/3 directly mounted relay range 28 to 42 A as in repair complete all as directed by the Engr-in-Charge. (Make : L&T , Cat No: SS 91859OOFO or equivalent model in other makes specified in tender

S&F MCCB 3 pole 36 KA breaking capacity 200 Amps with thermal magnetic release, Ics = 100% Icu incl taking down existing MCCB complete all as directed by the Engr-in-Charge. (MAKE: L&T, Cat No: CM92009OON1OG / LEGRAND, Cat No: 4202 38 / C&S, Cat No: CSE2NN250ATM3P / HAGER, Cat No: HNT200DR or equivalent model in other makes specified in tender)

S&F MCCB 4 pole, 415 Volts Adjustable type, 250 Amps with breaking capacity 36 KA , Ics = 100% Icu, front operated with extension rod fixing on existing LT panel board, incl taking down existing MCCB complete all as specified and as directed. (MAKE: L&T, Cat No: CM92109OOP1OG / LEGRAND, Cat No: 4202 49 / C&S, Cat No: CSCN250EM2504P / HAGER, Cat No: HNT251DR or equivalent model in other makes specified in tender)

S&F PVC insulated single core multi stranded copper conductor FRLS Cable of cross sectional area 10 sq mm for inter-connection incl taking down existing cable complete all as specified and as directed.

All as per item No 23 above but of cable size 6 Sqmm.

Collection of water samples from different water supply installations and water treatment plant under Fort William Area in a special sterilized container and submitting to test laboratory for Bacteriological/Chemical analysis as detailed here-in-after and obtain test result from lab incl submitting to Engineer-in-Charge as directed. Nature of Tests :- 1.Colour, Hazen Units 2. Odour 3. PH 4. Taste 5. Total Dissolved Solids 6. Turbidity, NTU 7. Ammonia (as Total Ammonia) 8. Aluminium (as Al) 9. Anionic detergents (as MBAS) 10. Barium (as Ba) 11. Boron (as B) 12. Calcium (as Ca) 13. Chloroamines (as Cl2) 14. Chloride (as Cl) 15. Copper (as Cu) 16. Fluoride (as F) 17. Free residual chlorine 18. Iron (as Fe) 19. Magnesium (as Mg) 20. Manganese (as Mn) 21. Mineral Oil 22. Nitrate (as NO2) 23. Phenolic compounds (as C2, H2, OH) 24. Selenium (as Se) 25. Silver (as Ag) 26. Sulphate (as SO2) 27. Total alkalinity (as calcium carbonate) 28. Sulphide (as H2, S) 29. Total hardness (as CaCO3) 30. Zinc 31. Arsenic 32. E-Coli 33. Total Coliform (NOTE: Testing shall be carried out at NTC/Jadavpur University/RV Briggs & Co Pvt Ltd Kolkata or any other Govt approved laboratory with prior approval of GE)

M&L for Preparing the surface by removing the spalled and loose plaster from existing surface and making it sound and clean by removing all dust particle and washing the surface with jet water. Then allowing the surface to dry and check for any cracks, honeycombing and other foreign particle complete as directed by site engineer.

Supplying, providing, mixing and laying over the prepared surface with cement mortar of average 15 mm thick or as per requirements in CM 1:3 (1 Cement : 3 Sand) mixed with bonding agent, Nitoband SBR lated @ 5 liter per 50 Kgs of cement and integral waterproofing admixture complast WL of Fosroc Chemicals @ 125 ml per 50 Kg of cement complete all as specified and directed

M&L cross arms, bracing, supports, clamps and back plate fabricated from structural steel section including nut, bolts, washers, welding, bending, cold or hot, drilling holes for bolts in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of aluminium/Black paint complete all as specified and as directed .

Supply only,Poly Aluminum Chloride (PAC) suitable for drinking water, high basicity in granular/ powder form inorganic soluble polymer confirming to IS 15573 in required pack. Make : Vikram PAC or Equivalent

Supply only, High strength calcium based granular chlorination chemical (Calcium Hypochlorite in 45 Kg Drum) having chlorine (cl) percentage by volume 65% to 70% (disinfectant for water treatment). Make: Purichlor /Aqua fit or any make and brand as approved.

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in depth for foundation or for shafts, wells cesspits, manholes etc., not exceeding 10 sqm on plan and getting out in soft/loose soils, complete all as specified and directed.

Returning filling in including spreading, levelling, watering and well ramming in layers not exceeding 25 cm complete all as specified and directed.

Removing excavated material not exceeding 50 metre and deposited where directed at a level not exceeding 1.5 metre above the starting point in soil complete all as specified and directed.

Taking up/down CI/DI water mains and connections/fittings of any type from trenches /walls/floors/(or any other location) for replacement /reuse in old/new location/diversion by burning out /removing of lead joints/tyton joints/rubber gasket joint complete all as specified and directed for the following size of pipes :- (Note: Necessary earthwork, if any shall be measured and paid separately under relevant item.

80 mm bore

100 mm bore

150 mm bore

200 mm bore

Relaying of the following size CI/DI water mains after thoroughly cleaning, with new fittings fixed to wall/ceiling/floor or laid in trenches complete all as specified and directed for the following size of pipes :-

80 mm bore

100 mm bore

150 mm bore

200 mm bore

Supply, laying and testing of cast iron pipes with spigot and socket ends centrifugally cast of Class 'A' in any length, laid in trenches/floors/walls/ceilings with new fittings, complete all as specified and directed for following size of pipes :-

80 mm bore

100 mm bore

150 mm bore

200 mm bore

Supply, laying and testing of cast iron pipes with flanged ends centrifugally cast of Class 'A' in any length, laid in trenches complete all as specified and directed for following size of pipes :-

80 mm bore

100 mm bore

150 mm bore

200 mm bore

Supply, laying, connecting and testing of ductile iron pipe, spigot and socket ends, class K-7 in standard working length conforming to IS-8329 laid in trenches, complete all as specified and directed for the following size :-

Burning out lead joints in position of cast iron pipes, fittings and re-making joints using old retrieved lead with & including necessary earth work as required at site, complete all as specified and directed for following size of pipes :-

80mm bore

100mm bore

150mm bore

200mm bore

Note for Item No 39.01 to 39.04: In case, inadequate lead is retrieved from burning out, for remaking joints, additional lead required shall be measured and paid separately as "Supply only".

Supply only lead confirming to IS 782 complete all as specified and as directed.

S&F CI bends upto 150 mm bore (any type, radius and angle) taper any type (straight, bend, increasing, decreasing or double socket etc) tee pieces, 'Y' junction, double branch, cross (all sockets or socket and spigot) collars, caps and plugs complete all as specified and as directed.

All as per item No.41 here in before, but fittings for pipes of 200 - 300 mm dia

S&F CI bends, tapers, tee pieces (single & double branch) any type and angle/radius and straight connecting pieces but al ends flanged for pipes upto 150 mm bore complete all as specified and as directed.

All as per item No.43 here in before, but fittings for pipes of 200 - 300 mm dia

S&F DI bends upto 150 mm bore (any type, radius and angle) taper any type (straight, bend, increasing, decreasing or double socket etc) tee pieces, 'Y' junction, double branch, cross (all sockets or socket and spigot) collars, caps and plugs complete all as specified and as directed.

All as per item No.45 here in before, but fittings for pipes of 200 - 300 mm dia

Taking up or down GI Steel Water Tubing including Connections and Fittings, Segregating Serviceable Pipes & Fittings, Stacking properly at Site(s) and keep in Safe Custody for re-use, complete all as specified and as directed for the following size of pipes :-

100mm bore

80mm bore

50mm bore

40mm bore

25mm bore

20mm bore

15mm bore

Relaying/Re-fixing Galvanised Steel Tubing and Connections in New or Old Position (Serviceable Pipes and Fittings obtained from taking down item) after Cleaning both Inner and Outer Surfaces of Pipes by using of Wire Brush, laid in trenches complete all as specified and as directed for the following size of pipes :-

100mm bore

80mm bore

50mm bore

40mm bore

25mm bore

20mm bore

15mm bore

Relaying/Re-fixing Galvanised Steel Tubing and Connections in New or Old Position (Serviceable Pipes and Fittings obtained from taking down item) after Cleaning both Inner and Outer Surfaces of Pipes by using of Wire Brush, fixed to walls and ceilings or laid in floors complete all as specified and as directed for the following size of pipes :-

100mm bore

80mm bore

50mm bore

40mm bore

25mm bore

20mm bore

15mm bore

Supply, Laying and testing Steel Water Tubing, Galvanised, ‘Medium Grade’ with all Fittings, laid in trenches or any other Situation, complete as all specified and as directed for the following size of pipes :-

100mm bore

80mm bore

50mm bore

40mm bore

25mm bore

20mm bore

15mm bore

S&F Cast Iron Sluice valve of Class PN-1.6 long body type, heavy duty, ISI marked (IS 1538) flanged end with iron wheel and brass spindle including rubber gasket joints, nuts, bolts etc as in repair complete all as specified and directed for the following size of pipes :-

80 mm bore

100 mm bore

150 mm bore

200 mm bore

300 mm bore

S&F in repairs, butterfly valve in DI body with stainless steel disc & stem, nitrile/eqpt liner, ISI marked, lever operated with necessary rubber gaskets, nuts and bolts and washers of suitable size complete all as specified and directed for the following size of pipes :-

40mm bore

50mm bore

80mm bore

100mm bore

150mm bore

200mm bore

S&F in repair, Cast Iron non-return valve, with bypass arrangement, ISI marked, with flanged ends including rubber gasket joints, nuts, bolts etc complete all as specified and directed for the following size of pipes :-

80 mm bore

100 mm bore

150 mm bore

200 mm bore

300 mm bore

S&F in repair, Cast Iron foot valve/ stainer ISI marked, with and including necessary nuts, bolts, washers etc and cutting threading of GI pipe if required and lowering in the sump, complete all as specified and directed for the following size of pipes :-

100 mm bore

150 mm bore

200 mm bore

S&F in repair, 100 mm bore, double orifice air release valve in CI body, ISI marked including rubber gasket joints, nuts, bolts etc complete all as specified and directed.

S&F in repair, 50 mm bore, gun metal check valve, ISI marked including rubber gasket joints, nuts, bolts etc complete all as specified and directed.

S&F Gun metal gate valve as per IS : 778-84 Class-1 Pressure tested 2.4 Mpa with iron wheel head, screwed both ends for iron pipes or for unions as in repairs, complete as all specified and as directed for the following size of pipes :-

80 mm bore

50 mm bore

40 mm bore

25 mm bore

20 mm bore

S&F CI butterfly valve, BS-5155 Gear operated with necessary rubber gaskets, nuts and bolts and washers of suitable size as in repair complete all as specified and directed for the following size of pipes :-

80mm bore

100mm bore

150mm bore

200mm bore

M&L preparation of old painted surfaces of CI/DI pipe lines, including valves of any type or size, at various pump houses and applying one coat of synthetic enamel paint (colour/shade as approved by Engr-in-Charge) and marking the water flow directions on pipe lines complete all as specified and as directed for the following sizes :-

50 mm bore pipe

65 mm bore pipe

80 mm bore pipe

100 mm bore pipe

150 mm bore pipe

200 mm bore pipe

M&L for cutting of road/hard standing not exc 30cm in width and not exc 60cm in depth for removal/laying of water tubing including returning filling and making good the disturbed surfaces with PCC 1:2:4 type B1 using 20mm graded aggregates, 100 mm thick, on top, finishing surfaces even and smooth without using extra cement complete all as specified and directed.

Supply, laying and testing of 32mm outer dia, 3- layer PP-R (Polypropylene random copolymer) pipes SDR 11 UV stablised and antimicrobial fusion welded having thermal stability for hot & cold water supply all PP-R plain & brass threaded polypropylene random fittings laid in trenches complete all as specified and directed by Engr-in-Charge.

Suply and fixing PPR Gate valve with brass insert and brass working parts suitable for 32mm OD PPR pipe complete all as specified and directed

Construction of valve chamber of size 750x750x750mm internal size suitable for housing sluice valve/ gate valve etc with PCC 1:4:8 type D2 for foundation 15mm thick with an offset of 5 cm on all sides, brick work in CM 1:4 230mm thick rendering in CM 1:4, 15mm thick, 5 cm thick & 230mm wide PCC 1:2:4 type B1 coping over brick work all around including provision of MS angle iron frame 25x25x3mm embedded in concrete with suitable hinges 3mm thick MS sheet cover and locking arrangements including two coats of synthetic enamel paint over a coat of red oxide metal primer on exposed steel surfaces including demolition of existing damaged valve chamber and necessary excavation & earth work etc all as specified and directed

M&L Framed Work such as brackets of angles or tees with web and flanges cut to shape, drilled and countersunk for screw, including bending and welding angles as necessary, gusset plates, riveting, etc. conforming to Fe-290, Gde-E-165, complete all as speci-fied and as directed.

Supply, hoisting and fixing rotational moulded polyethylene water storage tank (cylindrical vertical type with closed top) of capacity 5000 Litres, multi-layered (ISI marked), with GI tank nipple & cover, hoisted and fixed in position all as specified in SSR Part-I incl dismantling of existing unsv tank complete all as specified and directed.

Supply, hoisting and fixing rotational moulded polyethylene water storage tank (cylindrical vertical type with closed top) of capacity 2000 Litres, multi-layered (ISI marked), with GI tank nipple & cover, hoisted and fixed in position all as specified in SSR Part-I incl dismantling of existing unsv tank complete all as specified and directed.

S&F in repair 40 mm bore Ball brass valves, high pressure, with HDPE float and flynut complete, screwed for iron pipe or brass ferrule and fixed complete all as specified and directed. (MAKE : PRAYAG, Cat No. I-155 or equivalent model in JEXON / POLYTUF / SHAKTI)

S&F in repair 25 mm bore Ball brass valves, high pressure, with HDPE float and flynut complete, screwed for iron pipe or brass ferrule and fixed complete all as specified and directed. (MAKE : PRAYAG, Cat No. B-153 or equivalent model in JEXON / POLYTUF / SHAKTI)

MS AP CONSTRUTION AND CO

M A ENTERPRISES

GHOSH ENTERPRISE