CLEANING OF OVERHEAD RESERVOIR UNDER GROUND SUMP HOUSE AND REPAIR / MAINT OF IRON REMOVAL PLANT, DI/CI/GI PIPE LINE SYSTEM INCLUDING REPLACEMENT OF PPR PIPE LINE AND ALLIED WORK AT BARRACKPORE UNDER GE (AF) BARRACKPORE

Amount

M & L for seven stage cleaning and sterilization of inside the RCC over head tank of capacity 50000 gallons through bacteriological treatment by using TERBACG10, TERBAC G5, TERBACG- 65 and ULTRA VOILET RAY complete all as specified and as directed. Steps for seven stages are as under :- First Stage- To drain out the water by using exit valve or high capacity dewatering system. Second Stage- Cleaning all the algae formation inside the tank by using TERBACG10 a laboratory tested branded chemical of the company and scrubbing the walls of the tanks. Third Stage- Fresh water cleaning by high speed jet pump. Fourth Stage- First bacteria screening is sterilization by using TERBAC-G5 a Govt laboratary certified branded halogen compound. Fifth Stage- Cleaning the floor of water tank by heavy duty industrial vaccum cleaner. Sixth Stage- Second bacteria screening and sterilizing method by using ultra voilet ray within the tank and kills all suspended bacteria. Seventh stage- Cleaning and third bacteria screening is to sterlize the floor of the water tank by using laboratory certified, branded strong oxidizing agent TERBAC-G65.

Note :- (a) Work will be carried through specialized agency from one of the below given makes. (b) Company will submit Govt laboratory test certificate of TERBAC-G5, TERBAC-G65, fix the sticker mentioning the date of cleaning & name of site and also provide, certificate confirming the completion of sterlization of watr tanks mentioning the name of station and date of cleaning. All the cleaning & sterlization staffs should be under accidental insurance coverage. (c) Any damage occured to the tank during the process of cleaning the tank shall be repaired without any extra cost. (d) The quoted rate shall include for guarantee of a period of One year from the certified date of cleaning. (e) All debris and waste material obtained during cleaning of tank shall be disposed at a location decided by Engineer -in- Charge without any extra cost. Authorised agency:- Rays cleantech / Inus watertech / Satya enterprises. Location- Pump House No- 03

All as per Item No 1.00 here-in-before but for 15000 Gallon RCC Tank and -ditto-. Location: HAL Area

All as per Item No 1.00 here-in-before but for 10000 Gallon Under Ground Reservoir and -ditto-. Location: Pump House No. 03

All as per Item No 1.00 here-in-before but for 5000 Gallon Under Ground Reservoir and -ditto-. Location: Pump House No 04

Material and labour for construction of brick masonry valve pit of size 1200x1200x1200mm (internal dimension) with one brick thick PCC (1:4:8) type D-2 (using 40mm graded stone aggregate) as in foundation concrete including PCC (1:3:6) type C-1 (using 20mm graded stone aggregate) as in bedding and coping 10mm thick cement plaster in cement mortar (1:4) internally and externally upto 15 cm below ground level providing valve pit 50x50x6mm angle iron frame all round the fixed point by means of 4 Nos hold fast 150mm long made out of flat iron 40 x 6 mm embedded in PCC block (1:2:4) type B-1 (using 20mm graded stone aggregate) of size 230 x200 x100mm. including provision of hinges welded with angle iron frame and mild steel cover 3 mm thick, mild steel handle of suitable and size welded with mild steel cover and suitable locking arrangement and applying two coats of synthetic enamel paint over a coat of red-oxide primer including necessary excavation work in soft/ loose soil including dismantling of unserviciable existing valve pit complete all as shown in Drawing No AF/TD/240/15 of sheet 1/2 & 2/2 and directed.

All as per item no 5.00 herein before but size 900x900x900mm (internal dimension) and -ditto-.

Material and labour for plain cement concrete (1:2:4) type B1 (using 20 mm graded stone aggregate) in bases / pedestals for pipe lines , mud stops or chamfered on edges complete all as specified and directed.

Material and labour for cutting the road/hard standing and making good disturbed surfaces by using PCC (1:3:6) type C-2 (using 40 mm graded stone aggregate) for fixing the pipe complete all as specified and directed.

Material and labour for boring under road / taxi track / PCC / drain for laying of CI/GI/DI of 80 mm dia without disturbing top surface complete all as specified and directed.

Taking down cement plaster of any description built in cement mortar on brick or stone walls etc including racking out joints, hacking for key, scrubbing down with water etc. and removal of rubbish from the site complete all as specified and as directed.

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

Materials and labour for complete removal of existing treatment of steel surface of any description over 10 cm width or girth and applying two coats of synthetic enamel paint over a coat of red oxide zinch chrome primer including preparation of surfcaes complete all as specified and directed.

Testing of water for chemical and biological analysis of both raw and treated water from accredited lab of PHED or central Govt licenced authorised labs and submitting test result sheet to AGE E/M (AF) office for further record all as specified and directed. Note: Transportation cost for collecting of water sample from pump house No 1, 2, 3 & 4 of 6 Wing shall be borne by the contractor.

Material and labour for 15mm bore (nominal) Gl tubing (medium grade) including all necessary pipe fittings (such as bends, elbows, tees, short pieces, connectors, back- nuts, reducer, diminishing pieces, caps, plugs and unions, etc.) and laid in trenches including taking down old unserviciable existing GI pipe complete all as specified and directed.

All as per Item No 14.00 here-in-before but 20mm bore (nominal) and -ditto-.

All as per Item No 14.00 here-in-before but 25mm bore (nominal) and -ditto-.

All as per Item No 14.00 here-in-before but 40mm bore (nominal) and -ditto-.

All as per Item No 14.00 here-in-before but 50mm bore (nominal) and -ditto-.

All as per Item No 14.00 here-in-before but 80mm bore (nominal) and -ditto-.

Material and labour for 20mm bore (nominal) Gl tubing (medium grade) including all necessary pipe fittings (such as bends, elbows, tees, short pieces, connectors, back- nuts, reducer, diminishing pieces, caps, plugs and unions, etc.) and fixed to walls, ceilings, roofs or laid in floors including making good disturbed portion including taking down old unserviciable existing GI pipe complete all as specified and directed.

All as per Item No 20.00 here-in-before but 25mm bore (nominal) and -ditto-.

All as per Item No 20.00 here-in-before but 40mm bore (nominal) and -ditto-.

Supply and fix in repair 150 mm dia cast iron sluice valve PN-1.6 conforming to IS-14846 flanged end complete with iron wheel head and stainless steel spindle complete all as specified and directed.

All as per Item No 23.00 here-in-before but 100mm dia and -ditto-.

All as per Item No 23.00 here-in-before but 80mm dia and -ditto-.

Supply and fix in repair 150mm dia cast iron Non return valve PN-1.6 flanged end swing type with nitrile rubber flap, conforming to IS-1538 complete all as specified and directed.

Supply and fix in repair 150mm dia cast iron butterfly valve wafer type complete all as specified and directed.

Supply and fix in repair 20mm dia gun-metal gate valves with iron wheel head, screwed both ends complete all as specified and directed.

All as per item No 28.00 above but for 25mm dia and -ditto-.

All as per item No 28.00 above but for 40mm dia and -ditto-.

All as per item No 28.00 above but for 50mm dia and -ditto-.

Supply and fix in repair 25mm dia gun-metal Non return valve complete all as specified and directed.

Supply and fix in repair 25mm dia PP-R Gate valves (brass insert) complete all as specified and directed.

All as per item No 33.00 above but for 32mm dia and -ditto-.

All as per item No 33.00 above but for 40mm dia and -ditto-.

All as per item No 33.00 above but for 50mm dia and -ditto-.

All as per item No 33.00 above but for 63mm dia and -ditto-.

Excavation in trenches n.exc. 1.5m wide and n.exc1.5m depth for foudation, trenches for laying of pipe line etc. and getting out in soft/loose soil complete all as specified and directed.

Removing excavated material to a distance not exc 50m and depositing where directed at a level not exc 1.5 m above the starting point complete all as specified and directed.

Returning, filling in, inclsive spreading, levelling, watering and well ramming in layers not exc 25cm in type of soil complete all as specified and directed.

Material and labour for attending break down of pipe line of 80mm/100mm/150mm dia of CI/DI/MS Pipe bursting / cracks including cleaning / removal of broken pipe pieces of various lengths through gas cutting / manual cutting as per site requirement and providing transport to work site for material and tools and inserting necessary specials such as pipes, CI Collar / mechanical Joints etc as required at site under relevent items, including testing for leakages of lead joints and necessary dewatering up to completion of the job work at site complete all as specified and directed Note:1 The following items, shall be measured and paid separately under respective items. (i) Earth work (ii) All type of Specials of CI/DI/MS pipes of various suitable sizes. (iii) All type of joints like lead joint, tyton joint,flange joint,mechanical collar joint etc., (iv) All CI/DI/MS pipes of various suitable sizes. Note:2 Rates quoted deemed to inclusive of the following: (i) Arrangement of suitable Pump set for dewatering at the time of attending break down (ii) Labour/Trade men for attending break downs (iii) Transport to shift the material and tools (iv) Levelling/ allighnment to both sides pipe for jointing (v) Arrest/rectification of leakages if any whileTesting if any, immediately to restore.

Material and labour for cutting and removing the defective CI water supply pipe lines of size 150mm dia and inserting new CI pipe of 150 mm dia as required at site, insert the pipe in position including testing complete all as specified and directed.

All as per item No 42.00 above but for 100mm dia pipe and -ditto-.

All as per item No 42.00 above but for 80mm dia pipe and -ditto-.

Material and labour for rectification of existing defective run lead / tyton joints of 80mm dia CI pipe including burning and removing the old defective lead joints and providing new lead joints with all required materials and testing the joints for leakages complete all as specified and directed. Note:1 Quoted rate shall not inclusive for the following work and shall be measured and paid separately under respective items. (i) Earth work (ii) All type of Specials of CI/DI/MS metals. (iii) All CI/DI/MS pipes.

All as per item No 45.00 above but for 100mm dia pipe and -ditto-.

All as per item No 45.00 above but for 150mm dia pipe and -ditto-.

Supply and fix MS flange 15mm thick for welded to 150 mm dia MS pipe and flange joint with 6mm thick rubber gasket with necessary nuts and bolts etc., complete all as specified and directed.

Material and labour for rubber gasket joints for SS/DF/SF CI pipes of bore 80 mm complete all as specified and directed.

Material and labour for rubber gasket joints for S/DF/SF CI CI pipes of bore 100 mm complete all as specified and directed.

Material and labour for rubber gasket joints for S/DF/SF CI CI pipes of bore 150 mm complete all as specified and directed.

Supply, laying and jointing of 150mm bore ductile iron pipes with spigot and socket ends suitable for push on rubber joint centrifugally cast, class (K-7) confirming to IS 8329 : 2000 , inner side cement lining and outer side black bitumen coating and any length including push on rubber (EPDM) ring with ISI marked laid in trenches including taking down old unserviciable existing DI pipe complete all as specified and directed.

All as per Item No 52.00 here-in-before but 100mm dia and -ditto-.

Supply and fix ductile iron fittings of 100 to 200mm dia, Class K-7 special suitable for push on jointing as per including mechanical joint (socket) conforming to IS-9523/2000 with inside cement mortar lining and out side zinc coating followed by bitumen coating complete all as specified and directed.

Supply and fix ductile iron fittings of of 100 to 200mm dia, Class K-7 special suitable for flange rating PN10/PN-16 jointing including mechanical joint conforming to IS-9523/2000 with inside cement mortar lining and out side zinc coating followed by bitumen coating complete all as specified and directed.

Supply and fixing of CI specials of any size such as bends (any type, radius and angle) tapers any type, (straight, bend, increasing ,decreasing or double socket etc.) tee pieces, single branch "Y" junction, double branch, cross (all sockets or sockets and spigot) collars, caps and plugs including ring washer gaskets/ lead joints as per ground requirement including taking old unserviciable existing CI special fittings complete all as specified and directed.

Material and labour for cutting existing steel tubing for alterations or additions of size 25-32 mm bore (Each cut measured) complete all as specified and directed.

Material and labour for cutting existing steel tubing for alterations or additions of size 40-50 mm bore (Each cut measured) complete all as specified and directed.

Material and labour for screwing existing steel tubing for alterations or additions of size 25-32 mm bore (or lengthening screw on pipe to form connector) complete all as specified and directed.

Material and labour for screwing existing steel tubing for alterations or additions of size 40-50 mm bore (or lengthening screw on pipe to form connector) complete all as specified and directed.

Dismantling of pressure filter media of 20000 gallons capacity by opening two Nos of main holes taking out the entire filter media of different grades (approximate volume 15.0 cum) from the pressure filter and removing the same not exceding 50 m and depositing where directed completed all as specified and directed.

Material and labour for scrapping cleaning and removing all scale and dirts etc from the internal surface of filtration plant and applying two coats of black bituminous paint to internal surface suitable for application in drinking purpose complete all as specified and directed.

Material and labour for washing properly the old filter media by water pressure or any suitable method including loading the washed filter media i.e. graded gravels and sand into the iron removal filter vessel 20000 GPH flow capacity of size 2400mm dia x 2400 mm height including testing of water before and after treatment of water from any goverment approved laboratory complete all as specified and directed. Note:- Contarctor shall submit water test report before realeasing any payments.

Taking out unserviciable filter media complete from filteration plant of capacity 20000 GPH (over all size of the pressure filter 2400 mm dia x 3050 mm over all height) and oxidation chamber of cap 20000 GPH (over all size of the pressure filter 1600 mm dia x 2500 mm over all height ) including depositing the same and removal of unserviciable materials to a distance not exc. 50 m complete all as specified and directed.

Material and labour for scrapping cleaning and removing all scale and dirts etc from the internal surface of pressure filter of capacity 20000GPH (over all size of pressure filter 2400mm dia x 3050 mm overall height) and appling two coats of black bituminous paint to internal surface (suitable for application in drinking purpose) complete all as specified and directed.

Material and labour for prepation of old painted outer side surface of pressure filter of capacity 20000 Gallon and all MS pipe (200mm, 150mm and 100mm bore) including panels etc and applying one coat of synthetic enamel paint complete all as specified and directed.

Material and labour for prepation of old painted internal surface of oxidation chamber of capacity 20000 GPH of size 100mm x1200mm height and applying two coats of anti-corrosive black bituminous paint (suitable for application in drinking purpose) including thorough cleaning scrapping inside surface of chamber complete all as specified and directed.

Material and labour for prepation of old painted outer side surface of oxidation chamber of capacity 20000 GPH of size 100mm x 1200mm height and applying two coat of synthetic emamel paint over a coat of zinc chromate primer including complete removal of existing treatement outer side surface of chamber complete all as specified and directed.

Material and labour for collecting gravel from the cascade consisting of three tiers and cleaning gravels by applying hydro-chloric acid / muratic and cleaning thoroughly the floor of three tier cascade with the help of water and finally spreading the cleaned gravels and testing cascade for smooth functioning etc complete all as specified and directed.

Material and labour for filling and laying in different layers of new washed filter media of cosisting gravels of different sizes and sand in to the pressure filter for following size :-

Coarse sand suitable for filter media of 16/32 mesh inside the pressure filter up to 6 layer from bottom.

Gravels of size 1/8'' to 1/4'' for filter media.

Gravels of size 1/4'' to 1/2'' gravels for filter media.

Gravels of size 1/2'' to 3/4'' gravels for filter media.

Gravels of size 3/4'' to 1'' gravels for filter media.

Gravels of size 1'' to 1/2'' gravels for filter media. Note for item No 70.10 to 70.60:- Punned down thickness shall be measured for payments.

Supply and fix in repair PVC strainer tube 25 mm bore, 750 mm long with filter hose, wall thickness 3.25 mm, both end 25 mm long threaded and one side fitted with 25 mm dia PVC plug cap complete all as specified and directed.

Supply and lay new catalysts (MnO2 ) into the oxidation chamber complete all as specified and directed.

Material and labour for cleaning and washining properly the old catalyst (MnO2) by water pressure or any suitable method with drying including loading the media into the oxidation chamber complete all as specified and directed.

Material and labour back washing of pressure filter of capacity 20000 Gallon untill sand free cleaning water is available including refixing of 2 Nos of main holes cover of pressure filter by using new gasket nut bolt etc complete all as specified and directed.

Supply and fix in repair 100mm dia water pressure gauge (1-10 Kg/ sq cm) bearing ISI marked complete all as specified and directed

M/S. TAPAS ENTERPRISE

NC BOSE AND CO

P.J. AND CO.

BISWAS CONSTRUCTION

BHAUMIK CONSTRUCTION