REPAIR / MAINTENANCE OF OHT, SLUICE VALUE ETC AND REPLACEMENT OF FILTER MEDIA SEDIMENTATION TANKS, GRAVITY FILTERS, PRESSURE FILTERS IN WATER SUPPLY INSTALLATIONS INCLUDING CHEMICALS TO WATER TREATMENT AND CERTAIN OTHER WORKS AT CHARDUAR AREA UNDER G

Amount

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:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected. Fixed credit has been given in technical documents which shall be taken into account during acceptance of bid/tender.

Excavation in trenches not exceeding 1.5 metre wide and and not exceeding 1.5 metre in depth for laying pipes/cable and getting out in soft/loose soil complete all as specified and as directed.

Returning, filling in and including spreading, leveling, watering and well ramming in layers not exceeding 25 cm thick in soft/ losse soil all as specified and as directed.

Removing excavated materials to a distance exceeding 50 metre but not exceeding 50 m and dipositing where directed at a level not exceeding 1.5 m above the starting point in soft / loose soil all as specified and directed.

M&L for repairs/rectification of leakage in UG cast iron /Galvanised iron pipe by means of choking lead wool/ pig lead or tightening of GI fittings complete including excavation and earth work for exposing the joints and working space on the site, returning, filling in and making good to the existing earth level of the surroundings after repair for the following sizes of pipes all as specified. Note;- (i) Rectification of leakage shall be attended and rectified by the contractor on the same day of reporting by the Engr-in-charge. Non rectification of leakage of pipe line shall be viewed as serious lapse on contractor's part and penal charges as Rs 100/- per complaint (ii) Supply only Lead wool/pig lead shall be measured and paid seperately. (iii) In case excavation beyound 1 mtr from both side of the joint is required the same shall be measured and paid separately under respective item. Note : (i) Rectification of leakage shall be attended and rectified by the contractor on the same day of reporting by the Engr-in-charge. Non rectification of leakage of pipe line shall be viewed as serious lapse on contractor's part and penal charges as Rs 100/- per complaint shall be imposed on contractor. (ii) Supply only Lead wool/pig lead shall be measured and paid seperately. (iii) In case excavation beyound 1 mtr from both side of the joint is required the same shall be measured and paid separately under respective item. (iv) GI/PPR pipes alongwith fittings shall be measured and paid separately.

100 mm bore

80 mm bore

50/40 mm bore

25/20 mm bore

Supply only pig lead for rectification of leakage of joints of CI pipe all as specified.

Taking up or down GI tubing/PPR including all fittings from trenches , wall, floor etc including cleaning by roding for refixing or removing to store for safe custody/ reuse or disposal under schedule of credit and all as specified for the following sizes:-

100 mm bore

80 mm bore

63 mm bore

50 mm bore

32mm/40 mm bore

25 mm bore

20 mm bore

Laying or fixing only of steel tubing/PPR obtained from item Sl No 12 here-in-before including provision of heavy duty ISI marked new GI fittings (Such as socket/ elbow/ Tee/ union/ reducer/ nipple/ flange etc) to wall/flooring /ceiling etc or laid in trenches all as specified. Note : Screwing if required shall be measured and paid separately under respective item

100 mm bore

80 mm bore

50 mm bore

40 mm bore

25 mm bore

20 mm bore

S & F Polypropylene Random Copolymer 3(Three) layer (PP-R) Pipes SDR 7.4 & SDR 11 UV stablized green coloured, inner anti microbial, fusion welded, having thermal stability for hot & cold water supply including all PP-R plain and brass threaded polypropylene random fitting, laid in trenches for the following sizes of pipes complete all as specified and directed.

S & F PP-R gate valve (brass insert) as per requirement of site and fixed in position including taking down unserviceable gate valves for the following size complete all as specified and directed.

Supply and lay in trenches cast iron pipe centrifugally cast suitable for spigot and socket end,class "A " including taking out old unsv cement/CI pipes of size :-

100 mm bore

80 mm bore

M&L for CI fittings any type such as bends( any type radious and angles) reducers Tees Y pieces collars caps plugs and straight connecting pieces upto 150 mm dia complete all as specified.

Cutting of existing cast iron pipe in position and reducing to required length for repair of blockage or insertion of CI fittings such as collars branches Tees etc for the following sizes complete including necessary earth work.

100 mm bore

80 mm bore

Burning out lead joint of pipe of following sizes in position including removing old lead to store or reuse at site.

100 mm bore

80 mm bore

Material and labour for run lead joint using new lead and spun yarn for CI pipe of sizes :-

100 mm bore

80 mm bore

Material and labour for run lead joint using old lead reterived from item ser no-13 and fixing new spun yarn for CI pipe of sizes:-

100 mm bore

80 mm bore

Cutting of existing GI pipe in position for taking down addition alteration or for repair complete all as specified and directed for the following sizes

100 mm bore

80 mm bore

50 mm bore

40 mm bore

25 mm bore

20 mm bore

Screwing ( Threads making ) of existing galvanised steel tubing for addition alteration extending or reducing in length for repair all as specified and directed for following sizes.

100 mm bore

80 mm bore

50 mm bore

40 mm bore

25 mm bore

20 mm bore

Supply and fix in replacement gun metal gate valves with iron wheel head screwed both ends for GI pipe all as specified for the following sizes:-

50 mm bore

40 mm bore

25 mm bore

20 mm bore

Supply and fix tube medium grade galvanised with all fittings laid in trenches of following sizes :-

100 mm bore

80 mm bore

Supply and fix MS flange heavy duty complete with nuts bolts and washers 06 nos suitable for 100 mm dia GI pipe.

Supply and fix MS flange heavy duty complete with nuts bolts and washers 06 nos suitable for 80 mm dia GI pipe.

M&L in replacement valve chamber cover with frame and locking arrangement made out of angle iron or other section and MS sheet with welding of holdfast etc. including hinges fabricated MS is not less than the thickness of frame all as specified including preparation of surfaces and applying two coats of synthetic enamel paint over a coat of red oxide primer.

Material and labour for construction of brick masonry valve pit of size 60 cm x 60 cm x 60 cm (internal dimensions) with one brick thick wall in cement mortar (1:4) on 100 mm thick PCC (1:4:8) type D2 (using 40 mm graded aggregate) as in foundation, 15 mm thick rendering in cement mortar (1:4) internally and externally up to 15 cm below ground level including, provision of valve pit cover made out of 3 mm thick MS sheet welded with 40 x 5 mm thick flat iron all round, on ISA 40 x 40 x 6 mm frame, fixed with hold fast 150 mm long, embedded in PCC (1:2:4) type B1 (Block size 230 x 200 x 100 mm) with necessary hinges, handles, locking arrangement, including applying two coats of white wash on plastered surfaces and two coats of bituminious paint over a coat of red oxide primer on steel surfaces and ncessary earth work in soft/loose soil complete all as specified and directed.

All as per item no 23 here in above but of size 90cm x 90cm x 90cm

Supply and fix in replacement of submersible copper cable of size 10 sq mm 3 core all as specified and as directed.

Supply , fixing and connecting in replacement MCCB 4 Pole ,415 Volt magnetic release( thermal setting 70 to 100 % and magnetic setting adjustable type 100 Amp with breaking capacity 25 KA.complete with extension links and connection in panel board all as specified and as directed.

S&F in repair on delay timer ADT-30S RLY 415v ,24v DC resistive suitable for 15 HP star delta starter all as specified and directed. Make- Schneider or equivallent in L&T/siemens.

S&F in repair contact for use with contactor as auxillary contact including on/off push for 15 HP star delta starter all as specified and directed Make- Schneider or eqivalent make in L&T/siemens

S&F in repair single phase preventer for 3 phase motor upto 20 HP capacity. Make : L&T/Schneider/Siemens

S&F in replacement digital ammeter of existing range square type all as specified and directed

S&F in replacement digital volmeter of existing range square type all as specified and directed

Supply and fix in replacement three phase VAFPF (Voltage, Amp, Frequency and Power factor meter) in pump house electric panels with accuracy class 0.5 operating voltage 415 Volts.Make: Schneider or equivalent in AE.

Supply and fix in replacement submersible pump motor starter fully automatic star delta operated enclosed in sheet enclosure type for submersible pump motor AC-3 rating 50 HZ 3 phase of capacity 15 HP complete including making necessary electrical connections all as specified and directed.Make- L&T /Schneider/Havells

Supply and fix in replacement submersible pump motor starter fully automatic star delta operated enclosed in sheet enclosure type for submersible pump motor AC-3 rating 50 HZ 3 phase of capacity 20HP complete including making necessary electrical connections all as specified and directed.Make- L&T /Schneider/Havells

Supply and fix in repair centrifugal monoblock pump motor starter fully automatic star delta operated enclosed in sheet enclosure type for submersible pump motor of capacity 15 HP, AC-3 rating 50 HZ 3 phase complete all as specified and directed. Make: Havells/schneider/L&T

Draining out water from sedimentation tank, filter bed, filtered water tank after opening sluice valves, plugs etc and cleaning the walls / bottom surface with the help of wire brushes and other cleaning device to remove sludge and cleaning with water for making ready to paint incl channel etc of capacity 20000 Gallon per day complete all as specified and directed.

Taking out filter media carefully from rapid sand gravity filter bed and depositing at a distance not less 50 mtr where directed, cleaning and removing sludge/silt deposited on the vessels of filter media to a distance and making ready all the surface to paint complete all as specified and directed.

Material and labour for applying two coats of approved quality bituminous paint lead freesuitable for potable water to internal surface of the sedimentation tank, filter bed & filtered water tank incl all nozzle, pipes etc with anti corrosive bituminous paint inside the gravity filter all as specified and directed

Dismantling /taking out of nozzles made out of 80mm/100 mm dia GI tubing by unscrewing thread/cutting etc from filter bed and sedimentation tanks and kept aside for re-use complete all as specified.

Re-fixing serviceable GI nozzles (lateral and header pipe) made out of 80mm/100 mm dia as dismantled item No 4 here-in-before with welding in proper position after cleaning /desilting and painting the same properly including black bituminous paint lead free complete all as specified and directed. Location:sonaipam ,Amaribari(Note : Cost of necessary welding if required at site is deemed to be included in the quoted rates)

Supply and fix GI nozzles in filter bed made out of 80mm dia GI pipe of length 1.1 Mtr each one end threaded and making requisite nos of holes as per exisitng and fixing with lateral pipe of size 150 mm in filter bed complete all as specified and as directed. (Note : Cost of necessary welding if required at site is deemed to be included in the quoted rates)

Supply and fix GI nozzles made out of 100 mm GI pipe of length 0.6 Mtr each in sedimentation tank complete with provision of cap on top (as per existing) and fixing with 150 mm GI pipe (lateral and Header pipe) and painting the same properly with black bituminous paint complete all as specified and directed. Location:sonaipam ,Amaribari(Note : Cost of necessary welding if required at site is deemed to be included in the quoted rates)

Dismantling and taking out old (lateral and header pipe) of size 150mm dia GI pipe incl fittings from filter bed/sedimentation tank for cleaning or removing to store complete all as specified and directed.

Re-fixing (lateral and header pipe) GI tubing & fitting 150mm bore as dismantelled against item No 46 here-in-before after cleaning/ de-scaling properly and painting the same with black bituminous paint complete all specified and directed.

S&F GI tubing medium grade 150 mm dia as lateral and header pipe complete with heavy duty fittings as per existing/as required at site and painting the same with black bituminous paint complete all as specified and directed.

Dismantling of GI pipe connections from the pressure filter plant of capacity 10000 GPH, opening the main hole and removal filter and depositing the same to a distance not exceeding 50 mtr and refilling gravel grade wise to the bed of filtration plant complete re-fixing the pipes in the original existing position after replacement of gasket of manhole cover and necessary nut bolts as required complete all as specified and directed.

Material and labour for painting to internal surface of iron removal chamber , pre filter chamber and oxidation chamber including pipes of complete filtration plant of capacity 10000 GPH with two coats of black bituminous paint lead free suitable for drinking water grade including necessary surface preparation by means of scraping brushing cleaning complete all as specified and directed.

M&L for opening of PVC strainers (nozzels) from pressure filters bed cleaning all PVC strainers throughly and removing all deposits and refixing of serviceable strainers complete all as specified and as directed Location.

S&F PVC nozzle (Dom type) as per sample for pressure filter and iron removal filter complete all as specified.

Supply and lay MNO2 compound duly treated in pressure filter plant complete all as specified and directed.

Supply and lay in layers carbofelt compound duly treated in pressure filter cum iron removal plant complete to the satisfaction of engr-in-charge all as specified and as directed.

M&L for painting to external surfaces of iron removal chamber, pre filter chamber, oxidation chamber including pipes complete of filtration plant with two coats of synthetic enamel paint of approved colour including necessary preparation of surface by means of scraping , brushing, cleaning all as specified and directed.

Supply and laying in layers pea gravels duly cleaned and washed of following grades:-Location: Harchura,Phulbari,sonaipam ,Amaribari

40mm to 20mm grade

20mm to 12mm grade

12mm to 6mm grade

6mm to 3mm grade

Supply and laying in layers dry and cleaned filter sand of source `Barakar River' in uniform layers, complete all as specified and directed.

M &L for cleaning the aeration tower including scrapping , scrubbing the deposited silt and washing properly including painting with two coats of black bituminous paint all as specified and directed.

Suply and fix in repair brass spindle for sluice valve 150mm with gun metal check nut (as per sample) all as specified and directed.

Suply and fix in repair brass spindle for sluice valve 100mm with gun metal check nut (as per sample) all as specified and directed.

Suply and fix in repair brass spindle for sluice valve 80mm with gun metal check nut (as per sample) all as specified and directed.

Supply and fix in repair gun metal check nut (as per sample) with inner threads suitable for 100 mm sluice valves all as directed at site.

Supply and fix in repair gun metal check nut (as per sample) with inner threads suitable for 80 mm sluice valves all as directed at site.

Material and labour for construction of brick masonary valve pit of size 90 cmx 90cm x 90cm (internal dimensions) with one brick thick wall in cement mortar (1:4) on 100mm thick PCC (1:4:8) type D2 (using 40mm graded aggregate) as infoundation , 15mm thich rendering in cement mortar (1:4) internally and externally upto 15 cm below ground level including provision of valve pit cover made out of 3mm thick MS sheet welded with 40 x 5mm thick flat iron all round , on ISA 40 x 40 x 6mm frame, fixed with hold fast 150mm long, embeded in PCC (1:2:4) type B1 (Block size 230 x 300x100mm) with necessary hinges, handles, locking arrangement including applying two coats of white wash on plastered surfaces and two coats of bituminous paint over a coat of red oxide primer on steel surfaces and necessary earth work in soft/loose soil complete all as specified and directed.

All as per item No 37 above but pit of size 60cmx60cmx60cm complete all as specified and directed.

M&L integral single LED aviation obstruction light comprisingof aluminium housing with polycarbonate enclosure including making necessary electrical connections complete all as specified and directed.

Supply and Fix 25x4mm GI strip earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc complete all as directed including taking down of old unserviceable existing system.

S&F air termination single pointed copper rod 12mm dia and 300mm long all as directed

Repair to leakage of PS overhead tank by means of replacement of old unsv nuts bolts, washers, packing materials lead wood /gasket etc gas welding to damaged PS plates any numbers and testing complete Note : Cost of scafolding required for working at approx 50 feet hight and others necessary safety measure is deemed to be included in the quoted rates

Dismantling and taking down old corroded PS plate of size 1.22m x 1.22m x 6 mm thick from the pressed steel over head tank by unscrewing nut & bolts or cutting joints and removing of nut & bolts etc including jointing material complete at the height of 50 feet all as specified and directed.Note : Cost of scafolding required for working at approx 50 feet hight and others necessary safety measure is deemed to be included in the quoted rates.

S & F factory made pressed steel plates of size 1.22m x 1.22m x 6 mm thick fixing with suitable size nuts and washer including all jointing material such as lead wool, gasket, non toxic black putty washer etc complete at the height of 50 feet all as specified and directed.

Material and labour for painting of complete tank (External surfaces) of capacity 9600 Gallon of size 4.22x3.88x2.44 mtr including staging,ladder,raising & delivery mains with two coats of synthetic enamel paint (one under coat, one finishing coat) after preparation of old painted surface by scraping old paint, rust and any other unwanted foreign material with wire brush, complete at the height of 60 feet approx all as specified and directed

Material and labour for applying two coats of anti corrosive bituminous paint lead free suitable for potable water to internal surfaces of PS tank of capacity 9600 gallon after preparation of old painted surfaces by scraping old paints, rust and any other unwanted foreign materials and cleaning the dust with water etc complete at the height of 50 feet all as specified and directed.

M&L for construction for MS float box made out of MS Sheet of 1.6mm thick and of size 30 x 30 x 25cm complete painting with black bituminous paint including supply and fixing of nylon rope of suitable size at the height of approx 50 feet testing complete all as directed.

M&L for construction for water level indicator of existing size made out of MS Sheet of 1.6mm thick complete including painting with super enamelled paint of white colour duly marked the water levels in red colour showing the levels of water inside the overhead tank including aero of existing size painted with red colour and fixed at the height of approx 50 feet testing complete all as directed.

Supply and replacement of PVC insulated flat copper stranded cable of size 10 sq mm 3 core all as specified and as directed.

Supply and fix in repair flange less butter fly valve quarter turn 100 mm bore lever operated for pressure filter including all fixing materials such as nuts, bolts and washers of required size all as specified.

Supply and fix sluice valves cast iron body PN-1.0 complete with brass spindle and hand wheel including joints and fixing material including taking down old unsv sluice valvecomplete all as specified and directed.

150 mm bore

100 mm bore

80 mm bore

M&L for repairing existing chemical dosing pump simple diaphragm type coupled with 0.5 HP 440 Volts AC 1440 RPM motors suitable for from 100 ltrs capacity dosing tank of any specification and making dosing pump , strainer and siphon valve and pressure filt valve etc functional complete all specified and directed by Engr-in-Charghe at site. . Note : Rates for PVC wire wooven (re-inforced) heavy duty flexible pipe from chemical dozing pump to venturi , along with ferrul and non return valve,repair to pump and motor etc is deemed to be inclcuded in the quoted rates.

Supply only Calcium based white/off white free flowing granular disinfectant chlorination chemical having 65% to 70% chlorine decomposing at 177 degree centigrade molecular weight 142.98 toxicity-oral rate LD 50.850 mg/kg in 45 kgs packing complete all as specified and directed.

Supply only Poly Aluminium Chloride (PAC) inorganic soluble polymer raw water flocculants powder in 25 kg bags confirming to the following specifications :- Bulk density/specific gravity at 20 degree celcius : 0.75 +0.10 PH value of aqueous solution (w/v) : 3.5-5.0 (1%) Chloride content (w/w): 31.0%+2.0% Sulphate content :10% max. Basicity: 40.0+5.0 Mercury and lead: Not desirable

Supply only Alum Ferric Grade-I in 20 Kgs pieces complete all as specified and directed.

Supply only calcium based lime powder best quality duly tested from govt approved test laboratory and as per relevent IS and supplied with stipulated time as required all as specified and directed.

Supply only free chlorine test kit with coloured sample complete with all testing fitments and testing solutions in rexine finish box complete all as specified and directed.

Supply only PH testing kit (range 6.8 to 8.4) for water supply complete with all testing fitments and testing solution rexine finish box complete all as specified and directed.

Supply only hardness test kit with all testing fitments and solutions in rexine finish box complete all as specified and directed.

Supply only iron test kit with all testing fitments in rexine finish box complete all as specified and directed.

Supply only TDS test kit with all testing fitments in rexine finish box complete all as specified and directed.

Strip opening of induction motor of capacity 15 HP and taking out burnt out windings,cleaning of motor rotor and stator with cleaning material. Rewinding of motor with super enamelled copper wire of existing gauge including replacement of unserviceable parts including transportation. Assembling of motor and testing complete to the satisfaction of Engineer-in -Charge.

M&L for taking out of defective submersible pump set of any discharge capacity from borewell including dismantling/taking out column pipe of any size/length alongwith submersible cable,nuts,bolts etc and lowering down the pump set alongwith coloumn pipe after carrying out necessary repairs/replacement of defective parts including replacement of old gaskets and testing on completion all as specified and directed.

Strip opening of submersible motor and taking out burnt windings,cleaning of motor rotor and stator with cleaning material,carrying out necessary machining work such as grinding, metaling and polishing and rewinding of motor with stove enamelled copper wire of existing gauge,replacement of unserviceable parts as required. Assembling of motor and testing complete upto entire satisfaction of Engineer-in -Charge for 15/20 HP. Note :- Spare required shall be measured and paid separately under respective item here in after

Supply only the following in repair spare parts of submersible motor of capacity 15 to 20 HP of any make & model.

Motor bush upper and lower

Rotor bearing sleeve upper and lower.

Sand guard

Motor thrust plate assy

Motor coupler sleeve with key

Labour for collecting complaints in writting pertaining to external water supply system from concern JE at AGE Charduar office for various areas under AGE Charduar in writting during the hours as fixed by the Engr-in-Charge and detecting faults in distribution system/delivary or rising main system of any size or bore and any type/size of pipes laid in trenches/with wall/on floor/ to overhead tanks of any capacity/size at any height in any area under AGE Charduar and rectify the fault to restore the water supply services in all respect and upto entire satisfaction of Engr-in-Charge and comprising of the followings:- Person collecting the complaints/deputed by the contractor shall have sound knowledge of repairing/maintenance of CI/DI/PPR pipes and he will visit the site to assess the actual requirement/nature of fault in water supply system and also shall repair minor repairs to PP-R pipelines/CI/DI/GI pipe lines of any dia sponteneously. If any complaint left unattended by the the contractor ,penalty @ Rs 1000/- per complaint per day be imposed on contractor. Contractor shall be resposible to communicate the concern JE/AGE E/M regarding any major breakdown/fault within 30 minutes if the problem is of specific nature. Contractor shall be resposible for providing suitable transport to person deputed by him and shall be bound to reach at site within 30 minutes after receiving the complaint. Necessary T&P required to repairs all defects/faults shall be provided by the contractor and cost shall be deemed included in unit rate quoted by the contractor. Requirement of specific spares/stores such as CI/DI/PPR pipes and their respective fittings, sluice/gate and spares of water supply plants/equipments,excavation/earth work if required will be given by the contractor well in advance to Engr-in-charge/JE E/M.

M/S L N ENTERPRISE