88412E8 REP TO EXT WATER SUPPLY SYS, CLEANING OF RESERVOIRS AND CONNECTED WORKS UNDER GE CHENNAI.

Amount

REVISED BOQ UPLOADED ON 05 MAY 2022, BOQ UPLOADED ON 21 APRIL 2022 CANCELLED

SCH "A" PART-I (EXTERNAL WATER SUPPLY)

Demolition of cement concrete (un-reinforced) in ground floors and pavings not exceeding 150mm thickness (below or above ground level) and and removal of unserviceable debris to outside of MD land complete all as specified and as directed.

Dismantling wrought iron or mild steel work of any description not otherwise provided for and taken on credit complete all as specified and as directed.

Cutting existing bituminous road surfaces to a depth not more than 150mm, and making good the surface with PCC 1:3:6, type C1, using 20mm graded stone aggregate to match to the adjacent surface after laying pipes / cable including removal of debris to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

The cubical content of concrete provided to make good shall be measured for purpose of payment.

Surface dressing not exceeding 15cm including all grass vegetation, saplings, shrubs, brushwood, undergrowth, roots etc., and removing rubbish to outside of MD land in any type of soil complete all as specified and as directed.

Earthwork in excavation by mechanical means (hydraulic excavator) in foundation trenches or drains (not exceeding 1.5m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soil as directed within a lead of 50m in any type of soil complete all as specified and as directed.

Excavation in trenches not exceeding 1.5m wide and exceeding 1.5m but not exceeding 3.0m in depth for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc not exceeding 10 sqm on plan and getting out in any type of soil complete all as specified and as directed.

Earthwork is deemed to be carried out by manual method. However mechanised method may be adopted without any extra cost to the government.

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

Plain cement concrete, type B1, 1:2:4, using 20mm graded stone aggregate as in copings, bed blocks and the like including weathering, slightly rounded or chamfered angles and throating and necessary formwork complete all as specified and as directed.

Rolled mild steel as in plates (plain or chequered) channels, square cut or notched (ordinary and counter sunk) forming holes, without any attachment of Fe-410-W (Gde E-250, quality A) and fixing complete all as specified and as directed.

Rolled mild steel as in framed work as in valve chamber covers of angle or other section with gusset plates, rails, braces, etc., complete, drilled for fixing of steel sheeting or other covering. covers to be prepared for hanging or sliding with and including hinges (exclusive of steel sheeting or other covering) of Fe-410-W (Gde E-250, quality A) and fixing complete all as specified and as directed.

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Taking up cast iron mains (including all fittings), with spigot and socket ends and lead joints including burning out joints and recovering lead, trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of cast iron pipes with spigot and socket ends centrifugally cast, Class LA, in any length, laid in trenches or on supports, laid and tested of the following bore of pipe complete all as specified and as directed.

(a) Earthwork as required shall be measured and paid separately.

(b) CI specials and lead joints as required shall be measured and paid separately.

(a) 80mm bore of pipe.

(b) 100mm bore of pipe.

(c) 150mm bore of pipe.

Taking up Ductile iron mains (including all fittings), with spigot and socket ends and lead joints including burning out joints and recovering lead, trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of Ductile iron pipes, spigot and socket joints of "K-7" class in any lengths laid in trenches of the following bore of pipes complete all as specified and as directed.

(a) Earthwork as required shall be measured and paid separately.

(b) CI specials and lead / tyton joints as required shall be measured and paid separately.

(i) 80mm bore of pipe.

(ii) 100mm bore of pipe.

(iii) 150mm bore of pipe.

Taking up / down water mains of galvanised iron tubing including all fittings from trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of steel tubing, galvanised, medium grade, with all fittings such as bends, elbows, tees etc., and laid in trenches / under roads / crossings etc., of the following bore of pipes complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

(a) 15mm bore of pipe.

(b) 20mm bore of pipe.

(c) 25mm bore of pipe.

(d) 40mm bore of pipe.

(e) 50mm bore of pipe.

(f) 80mm bore of pipe.

(g) 100mm bore of pipe.

Taking up / down water mains of galvanised iron tubing including all fittings from trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of steel tubing, galvanised, medium grade, with all fittings such as bends, elbows, tees etc., and fixed complete to walls and ceilings or laid in floors etc., of the following bore of pipes complete all as specified and as directed.

(a) 15mm bore of pipe.

(b) 20mm bore of pipe.

(c) 25mm bore of pipe.

(d) 40mm bore of pipe.

(e) 50mm bore of pipe.

Taking up HDPE mains (including all fittings) as in trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of HDPE pipes with and including screw / socket joints, PN 10 grade, with all fittings such as bends, elbows, tees etc., and laid in trenches / under roads / crossings etc., of the following bore of pipes complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

(a) 100mm bore of pipe.

(b) 75mm bore of pipe.

Cutting the existing damaged cast iron / galvanised iron / ductile iron pipes in position, and inserting suitable specials to suit the same diameter, making joints and testing for water tightness of the following dia of pipes complete all as specified and as directed.

(a) Earthwork as required is deemed to be included in the rate quoted.

(b) CI/DI/GI pipes, CI specials like collar and lead / tyton joints as required shall be measured and paid separately.

(ii) 150mm bore of pipe.

(ii) 100mm bore of pipe.

(iii) 80mm bore of pipe.

Cutting the GI steel tubing in position for alterations or additions, and inserting GI union, nipple and GI tee as required and rejointing to suit the same diameter and testing for water tightness, pipes laid in trenches, walls, floors or ceiling of the following dia of pipes complete all as specified and as directed.

(a) Earthwork as required is deemed to be included in the rate quoted.

(b) Rate shall include cutting and screwing of pipe as required to insert the GI fittings / specials.

(c) Rate shall include cost of GI fittings / specials inserted.

(i) 15mm bore of pipe.

(ii) 20mm bore of pipe.

(iii) 25mm bore of pipe.

(iv) 40mm bore of pipe.

(v) 50mm bore of pipe.

(vi) 80mm bore of pipe.

(vii) 100mm bore of pipe.

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Cast iron fittings 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 socket and spigot) collars, caps and plugs as required, weighed as per IS-1538 suitable for cast iron / ductile iron pipes upto 150mm bore of pipe, (flanged / socket) complete all as specified and as directed

Run lead joints as in repairs by melting down old lead including spun yarn or tarred gasket for the cast iron pipes, spigot and socket joints of the following bore of pipes complete all as specified and as directed.

(a) 80mm bore of pipe.

(b) 100mm bore of pipe.

(c) 150mm bore of pipe.

Dismantling and taking up unserviceable gate valve and removal from site under Sch of credit and provision of gun metal, globe or gate valves, with iron wheel head screwed both ends for iron pipe and fixed of the following bore of pipe complete all as specified and as directed.

(a) 15mm bore of pipe.

(b) 20mm bore of pipe.

(c) 25mm bore of pipe.

(d) 40mm bore of pipe.

(e) 50mm bore of pipe.

(f) 80mm bore of pipe.

(g) 100mm bore of pipe.

Dismantling and taking up unserviceable sluice valve and removal from site under Sch of credit and provision of Cast iron sluice valve with flanged ends drilled with holes, Class PN 1.6, ISI marked (conforming to IS 14846) with brass, non rising spindle, gun metal working parts with hand wheel and checknut, rubber gasket 3mm thick, mild steel nut, bolts and washers, necessary machining works of the following bore of pipe complete all as specified and as directed.

(a) 80mm bore of pipe.

(b) 100mm bore of pipe.

(c) 150mm bore of pipe.

Dismantling and opening up in situ of Cast iron sluice valve, and removing old worn out spindle, check nut, gasket, gland rope, mild steel nut, bolts and washers, taken on Sch of credit and replacing the same with new suitable parts, stainless steel spindle, with necessary machining works assembling back and testing for proper function for the following bore of pipe complete all as specified and as directed.

(a) 80mm bore of pipe.

(b) 100mm bore of pipe.

(c) 150mm bore of pipe.

Dismantling and taking up unserviceable ball valve and removal from site under Sch of credit and provision of ball valves high pressure of PTMT with epoxy coated aluminium rod and high density plastic ball screwed for iron pipe and fixed of the following bore of pipe complete all as specified and as directed.

(a) 15mm bore of pipe.(minimum weight 15mm-142gms)

(b) 20mm bore of pipe.(minimum weight 20mm-210gms)

(c) 25mm bore of pipe.(minimum weight 25mm-455gms)

(d) 40mm bore of pipe.minimum weight 40mm-690gms)

Construction of valve chamber suitable for sluice valves / gate valves, with earthwork in any type of soil, PCC foundation 100mm thick of 1:4:8, type D2, using 40mm graded stone aggregate, brickwork with fly ash bricks in CM 1:6, 230mm thick, PCC coping 50mm thick of 1:2:4, type B1, using 20mm graded stone aggregate, flooring of 40mm thick in PCC 1:2:4, type B1 using 20mm graded stone aggregate, rendering on both fair and other than fair face of brickwork in 15mm thick in CM 1:4, finished fair and even, finished with three coats of whitewash after preparing surfaces, Mild steel cover of size 200mm more than inner dimensions on plan of chamber of steel sheet of 3.15mm, on flat iron framework of 25mm x 4mm on edges and diagonal with base frame of angle iron 40mm x 40mm x 6mm, including locking arrangement painted with two coats of synthetic enamel paint over a coat of red oxide primer including dismantling existing valve chambers and removal of unserviceable debris outside MD land of the following inner dimensions complete all as specified and as directed.

(a) 750mm x 750mm x 750mm

(b) 1000mm x 1000mm x 750mm

Dismantling existing water tanks, exceeding 250 litres and not exceeding 500 litres, lowering and taken charge on credit and provision of rotational moulded polyethylene water storage tanks (cylindrical vertical with closed top), three layered hoisted and fixed in position all as specified in SSR Part-I of capacity 500 litres complete all as specified and as directed.

SCH "A" PART-II (REPAIRS TO PUMPSETS)

Dismantling the non functioning monoblock pumpset and motors of capacity upto 10 HP from foundation by opening of coupling and foundation bolts and transporting to workshop for repairing and reassembling after servicing and overhauling complete with oiling / greasing, lubricating the parts includng repair / renewal of worn out parts and spray painting with one coat of synthetic enamel paint of existing colour and writing SM/MES No with white paint and reinstallation, commissioning and testing on full load complete all as specified and directed by Engineer - in - Charge.

(a) Major defective spares replaced shall be measured and paid separately as supply only as given in list of spares here-in-after.

(b) Cost of consumables like grease, cotton waste etc., other minor items /spares such as nut, bolts washers, gaskets, paints etc which are not covered under List of spares but required for effective functioning of the plant shall be deemed to be included in the rate quoted.

(c) Digital photographic record of dismantling and reassembling of pumpsets alongwith motor shall be maintained and printout made part of Final Bill.

(d) Issue voucher and gate pass for taking out pumpsets and motors shall also be kept on record.

Dismantling the non functioning centrifugal pumpsets of capacity upto 10.0 HP from foundation by opening of coupling and foundation bolts and transporting to workshop for repairing and reassembling after servicing and overhauling complete with oiling / greasing, lubricating the parts includng repair / renewal of worn out parts and spray painting with one coat of synthetic enamel paint of existing colour and writing SM/MES No with white paint and reinstallation, commissioning and testing on full load complete all as specified and directed by Engineer - in - Charge.

(a) Major defective spares replaced shall be measured and paid separately as supply only as given in list of spares here-in-after.

(b) Cost of consumables like grease, cotton waste etc., other minor items /spares such as nut, bolts washers, gaskets, paints etc which are not covered under List of spares but required for effective functioning of the plant shall be deemed to be included in the rate quoted.

(c) Digital photographic record of dismantling and reassembling of pumpsets alongwith motor shall be maintained and printout made part of Final Bill.

(d) Issue voucher and gate pass for taking out pumpsets and motors shall also be kept on record.

Supply only spare parts of monoblock / centrifugal pumpsets upto 10 HP capacity complete all as specified and as directed.

(a) Ball bearing

(b) Terminal box

(c) Terminal connector 3 phase

(d) Bronze impeller (Electro dynamically balanced)

(e) Gun metal bush

(f) Cast iron Gland cup with bolt and nuts

(g) Cast iron flange drilled of suitable size with bolt and nuts including rubber gasket.

(h) Rotor

Dismantling motor of monoblock pumpsets of any make / model, rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of minor parts like worn out bush, bearing, shaft metalling / grinding and terminal lead for AC single phase, 230 volts grade, reassembling the motor commissioning and testing for full functionality, pumpsets of capacity upto 10 HP complete all as specified and directed by Engineer - in - Charge.

Dismantling the non functioning motors of centrifugal pumpset of following capacity / type from foundation by opening of coupling and foundation bolts and transporting to workshop rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of minor parts like worn out bush, bearing, shaft metalling / grinding and terminal lead for AC three phase, 415 volts grade, reassembling the motor commissioning and testing for full functionality, pumpsets of capacity upto 10 HP complete all as specified and directed by Engineer - in - Charge.

SCH "A" PART-III (EXTERNAL ELECTRIFICATION)

Twin dome integral LED aviation obstruction light, yellow painted comprising of die-cast aluminium housing. with heat resistant, clear thick glass and accessories with LED lamp as in repairs complete all as specified and as directed.

(a) Make shall be Bajaj Cat No. BGAV 302 LED or equivalent of makes as listed here-in-after.

(b) For all other mandatory requirements of LED fittings, please refer Particular Specifications here-in-after.

Test point terminal block made of gun metal or phosphorus bronze size 75 x 75 x 25mm drilled and screwed including 3 Nos 8mm dia 25mm long hex. head screw with porcelain insulator fixed on building as in repairs complete all as specified and as directed.

Air termination, single pointed aluminium rod 12mm dia and 300mm long as in repairs complete all as specified and as directed.

Taking down old cable and provision of flexible ABC Conductor, 1100 Volt , PVC Type D Insulated, Cores laid up, Overall Shielded by Al-mylar along with ATC drain wire and Overall PVC Type ST-3 Sheathed Cable of size 4 core 2.5 sqmm complete all as specified and as directed.

Aluminium strip 25 x 3.15mm with saddles and fixing screws etc., for roof conductors and down conductors above ground with and including DMC fibre insulators duly fixed as in repairs complete all as specified and as directed.

Earth continuity conductor or main earthing lead of 32 x 6mm galvanised iron strip 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. as required as in repairs complete all as specified and as directed.

Removing of old earthing materials and taken on credit and provision of new earthing complete with galvanised iron earth plate electrode 600mm X 600mm X minimum 6mm thick, with and including earthing of 32mm x 6mm GI strip protected by 40mm dia GI pipe light grade upto a length of 7.5m. The plate shall be buried directly in ground vertically to a depth not less than 2.25 metres below ground level with top edge of the earth plate at a depth not less than 1.5 metres below ground level, connected to earth lead as described here-in-before by means of bolts, nuts, washers and checknuts made out of galvanised iron or mild steel, earthing lead protected by as described here-in-before and connected to main switch board or main control board or electric pole all as shown on electrical plate No.3 of MES Sch Part-I including necessary earth work and excavation in any type of soil, plain cement concrete 1:3:6, type C1 chamber, reinforced cement concrete cover slab with locking arrangement and handle of 10mm dia MS round bars 450mm long, 1:2:4 type B1, 50mm thick with 8mm dia TMT bars at 140mm centre to centre both ways, GI pipe of bore 20mm medium grade for watering with funnel, wiremesh, salt, charcoal, lugs including testing complete all as specified and as directed.

Taking up and down steel tubing and connections and taken on credit and provision of Steel tubing, galvanised, light grade, with all fittings such as bends, elbows, tees etc., and laid in trenches / under roads / crossings etc., of bore of pipe 40mm protection complete all as specified and as directed.

Earthwork as required shall be measured and paid separately.

Taking up and down steel tubing and connections and taken on credit and provision of Steel tubing, galvanised, light grade, with all fittings such as bends, elbows, tees etc., and fixed on wall or laid in floors of 40mm bore of pipe for protection complete all as specified and as directed.

SCH "A" PART-IV (CLEANING OF RESERVOIRS AND WATER TESTING)

Getting of water samples of bore wells tested (physical and chemical analysis) by Govt recognised testing laboratories/institutes including collection of samples from various bore wells in clean sterlised bottles, transportation and collection and submission of report in triplicate complete all as specified and as directed.

Supply only of high strength calcium based granular chlorination chemical (Grade-I), white granules, passing through-100 BSS :1:1(+0.1)%, other insoluble calcium salts:1:1 (+0.1)%, dosage of 140 gms to 200 gms added to 1 lakh litres of water to achieve 1 ppm strength supplied in packs of 45 kg complete all as specified and as directed.

Supply only bleaching powder stable grade conforming to IS-1065 with minimum available chlorine percentage of mass 33.5% and slab percentage NIL complete all as specified and as directed.

Removal of existing old chlorine test kit and taken on credit and provision of new chlorine test kit with colour coded scale, all testing fitments, indicator solution of Orthotolidine solution in rexine finished box capable to test 75 samples complete all as specified and as directed.

Removal of existing old PH test kit and taken on credit and provision of new PH test kit with colour coded scale, all testing fitments, indicator solution of Bromothymol blue or Phenol red 100ml in rexine finished box capable to test 100 samples complete all as specified and as directed.

Draining out all water from Over Head Tank any height / staging, cleaning the internal surfaces by scrapping down / brushing and removing all silt, dirt, algae etc from walls, floors, washing / cleaning with water and bleaching powder and applying one coat of white wash to all internal surfaces of floor, walls and ceilings, preparing old steel surfaces and applying one coat of anti corrosive bituminous paint, such as on vent pipes, inlet, outlet pipes, ladder and one coat of synthetic enamel paint to MS pipe railing of the following capacities complete all as directed by Engineer-in-charge.

(a) Rate quoted is deemed to include painting to obliterate labels using black paint same as existing dimensions and writing particulars etc using white paint with height of letters same as existing writing

(b) The contractor shall provide all mandatory safety and precautionary measures for the labour to work in heights, enclosed spaces and prevent asphyxiation.

(c) Digital photographic record of work carried out for each OHT shall be kept on record and printout made part of Final Bill.

(d) All dirt, muck and growth removed during cleaning shall be disposed off away from MD land.

(e) The contractor may use mechanical machinery in the cleaning process. However nothing extra shall be paid for the same.

(i) 1,00,000 gallons capacity

(ii) 25,000 gallons capacity

(iii) 50,000 litres capacity

(iv) 10,000 litres capacity

Pumpout out all water from Under ground sump / storage tank / flood water storage sumps, cleaning the internal surfaces of by scrapping down / brushing and removing all silt, dirt, algae etc from walls, floors, washing / cleaning with water and bleaching powder and applying one coat of white wash to all internal surfaces of floor, walls and ceilings and one coat of cement base paint to all external surfaces including top surfaces of OH tanks and including preparing old steel surfaces and applying one coat of anti corrosive bituminous paint on all old steel surfaces such as vent pipes, inlet, outlet pipes, ladder of the following capacities complete all as directed by Engineer-in-charge.

(a) Rate quoted is deemed to include painting to obliterate labels using black paint same as existing dimensions and writing particulars etc using white paint with height of letters same as existing writing and painting of hash markings of water level indicator.

(b) The contractor shall provide all mandatory safety and precautionary measures for the labour to work in enclosed spaces and prevent asphyxiation.

(c) Digital photographic record of work carried out for each sump shall be maintained and printout made part of Final Bill.

(d) All dirt, muck and growth removed during cleaning shall be disposed off away from MD land.

(e) The contractor may use mechanical machinery in the cleaning process. However nothing extra shall be paid for the same.

(i) 2,00,000 litres capacity

(ii) 1,50,000 litres capacity

(iii) 1,00,000 litres capacity

(iv) 75,000 litres capacity

(v) 50,000 litres capacity

(vi) 25,000 litres capacity

(vii) 20,000 litres capacity

(viii) 75,000 litres capacity (Flood water UG sump)

(ix) 20,000 litres capacity (Flood water semi-UG sump)

Desilting of open / shallow wells by bailing out of water from the well by using pumpset, removing of silt (mud / sand etc) from the floor of the wells and depositing at a distance not less than 50m, cleaning the internal vertical surface of well with wire brushes, removing of plants, moss and algae growth and floating algae growth on the water, of diameter 4m to 6m feet and depth upto 10m complete all as directed by Engineer-in-charge.

(a) Rate quoted is deemed to include painting to obliterate labels using black paint same as existing dimensions and writing particulars etc using white paint with height of letters same as existing writing.

(b) The contractor shall provide all mandatory safety and precautionary measures for the labour to work in enclosed spaces and prevent asphyxiation.

(c) Digital photographic record of desilting work carried out for each openwell shall be kept on record and printout made part of Final Bill.

(d) All dirt, muck and growth removed during desilting shall be disposed off away from MD land.

G.L.THIRUMALAI NAIDU AND COMPANY