REPAIRS TO EXTERNAL WATER SUPPLY SYSTEM, CLEANING OF SUMPS/RESERVOIRS AND CONNECTED WORKS AT WATER SUPPLY INSTALLATIONS UNDER GE CHENNAI

Amount

Excavation in trenches in soft/ loose soil n. exc. 1.50m wide and n. exc. 1.50m deep for taking out/ laying cables, CI/ GI/ DI/ HDPE pipe line and getting out complete all as specified and directed.

Excavation in trenches in hard/dense soil n. exc. 1.50m wide and n.exc 1.50 m deep for taking out/ laying cables, CI/ GI/ DI/ HDPE pipe line and getting out complete all as specified and directed.

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

Removing excavated soil not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and directed.

Taking out following unserviceable GI/PPR/UPVC water main from trenches/walls/ floors including fittings / fixtures like bend, Tee, Union, Elbow etc with socketed ends and lead joints including burning out joints and complete all as specified and as directed. Note: Excavation and earthwork will be measured and paid separately under appropriate items.

15mm bore GI pipe

20mm bore GI pipe

25mm bore GI pipe

40mm bore GI pipe

50mm bore GI pipe

25mm bore PP-R pipe

20mm bore UPVC pipe

25mm bore UPVC pipe

40mm bore UPVC pipe

Supply, laying, jointing and testing 15mm bore galvanised steel water tubing medium grade including provision of all pipe fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc. laid in trenches, fixed to walls or laid in floors etc. complete all as specified and directed.

All as per item No. 6.00 above but 20mm bore tubing

All as per item No. 6.00 above but 25mm bore tubing

All as per item No. 6.00 above but 40mm bore tubing

All as per item No. 6.00 above but 50mm bore tubing

M & L for 3- layer PP-R Polypropylene random copolymer concealed pipes size 25 mm SDR 7.4 (PN16) UV stabilized and antimicrobial fusion welded having thermal stability for hot & cold water supply all PP-R plain & brass threaded polypropylene random fittings all pipe fittings such as bends, tees, elbows, reducers, unions, plugs, sockets etc laid in trenches complete all as specified and as directed

Supply, laying, jointing and testing 20 mm bore UPVC pipe (Sch 40 ) with screw, socket joints with all fittings/ fixtures like bends etc. laid in trenches, making alterations in existing/ new pipes as required complete all as specified and directed.

All as per item No. 12.00 above but 25 mm bore UPVC pipe.

All as per item No. 12.00 above but 40 mm bore UPVC pipe.

S&F Ball valve (Sch 80) for 20 mm bore UPVC pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

All as per item No. 15.00 above but 25 mm bore UPVC Ball valve . including taking down unserviceable UPVC Ball valve complete

All as per item No. 15.00 above but 40 mm bore UPVC Ball valve . including taking down unserviceable UPVC Ball valve complete

S&F gun metal, globe or gate valve confirming to IS 778-1984 with iron wheel head, screwed both ends for 15mm bore iron pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

S&F gun metal, globe or gate valve confirming to IS 778-1984 with iron wheel head, screwed both ends for 20mm bore iron pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

S&F gun metal, globe or gate valve confirming to IS 778-1984 with iron wheel head, screwed both ends for 25mm bore iron pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

S&F gun metal, globe or gate valve confirming to IS 778-1984 with iron wheel head, screwed both ends for 40mm bore iron pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

S&F gun metal, globe or gate valve confirming to IS 778-1984 with iron wheel head, screwed both ends for 50mm bore iron pipe including all fittings/ fixtures like nipple, union etc. fixed in repairs complete all as specified and directed. including taking down unserviceable gate valve complete.

Supply & fixing cast iron sluice valve PN 1.6 conforming to IS 14846-2000 with stainless steel spindle, iron hand wheel & cap suitable for 80mm bore pipe with flanged ends, any pattern including nuts, bolts, rubber gasket, wheel etc. including taking down unserviceable sluice valve complete all as specified and directed. including taking down unserviceable sluice valve complete.

Supply & fixing cast iron sluice valve PN 1.6 conforming to IS 14846-2000 with stainless steel spindle, iron hand wheel & cap suitable for 100mm bore pipe with flanged ends, any pattern including nuts, bolts, rubber gasket, wheel etc. including taking down unserviceable sluice valve complete all as specified and directed. including taking down unserviceable sluice valve complete.

Supply & fixing cast iron sluice valve PN 1.6 conforming to IS 14846-2000 with stainless steel spindle, iron hand wheel & cap suitable for 150mm bore pipe with flanged ends, any pattern including nuts, bolts, rubber gasket, wheel etc. including taking down unserviceable sluice valve complete all as specified and directed. including taking down unserviceable sluice valve complete.

Surface dressing n. exc. 15cm deep and getting out in soft/ loose soil including cutting of grass vegetation around pump house and removing excavated material (soil) and rubbish out side MD land complete all as specified and directed.

Testing of water samples (Raw and Treated ) for physical examination and chemical examination full test from TWADA/ Govt. approved laboratory complete all as specified and directed.

Cleaning of underground water storage sump of capacity 2,00,000 Ltrs having one compartment by specialized water tank clean process as under: and writing the details like 'Cleaned ON ',"sump capacity" with white enamelled paint over black painted surface on sump complete all as specified and directed. (a) Dewatering using submersible pump/bailing out of water upto the maximum depth level of Sump/ tank. (b) Cleaning the tank / UG sump bottom, walls and ceiling using high pressure water jet to dislodge the algae calcinations, dirt etc. (c) Disposing the dirt water sludge etc., using specially designed sludge removal pump. (d) Cleaning the tank inside thoroughly by using industrial grade vacuum pump to make the tank inside free from dirt, algae and sludge etc. (e) Treating the inside walls, bottom, ceiling of tank including all nooks and corners by using and spraying anti bacterial agent such as Hydrogen peroxide (bio degradable) for disinfection of tank inside (f) Total disinfection and sterilisation of tank hygienically cleaned and bacteria free and safe for storage of water (g) Distempering the water surface of tanks/sumps using weather proof distemper with two coats.

All as per item No.28 here in before but underground water storage sump of capacity 1,50,000 Ltrs complete all as specified and directed.

All as per item No.28 here in before but underground water storage sump of capacity 1,00,000 Ltrs complete all as specified and directed.

All as per item No.28 here in before but underground water storage sump of capacity 75,000 Ltrs complete all as specified and directed.

All as per item No. 28 here in before but underground water storage sump of capacity 50,000 Ltrs complete all as specified and directed.

All as per item No. 28 here in before but underground water storage sump of capacity 25,000 Ltrs complete all as specified and directed.

All as per item No.28 here in before but underground water storage sump of capacity 20,000 Ltrs complete all as specified and directed.

All as per item No.28 here in before but underground flood water storage sump of capacity 75,000 Ltrs complete all as specified and directed.

All as per item No.28 here in before but semi underground flood water storage sump of capacity 20,000 Ltrs complete all as specified and directed.

Dewatering shallow well 4 to 6 meter dia and upto 10 meter deep, desilting and disposing off the sand deposits at a distance not exceeding 200m away including cleaning the well thoroughly including of vegetation removing and writing the details like 'Cleaned ON ',"sump capacity" with white enamelled paint over black painted surface on well complete all as specified and directed.

M & L for cleaning of OH reservoirs of size 1,00,000 gallons by bailing out water through washout pipe, cleaning the tank complete after removing the sludge and washing the inner surface of tank with bleaching powder complete all as specified and directed. Note: The rate quoted by the Contractor deemed to be inclusive of the following (a) Provision of Scaffolding (b) Repairs to existing approach ladder (c) Painting of ladder with 2 coats synthetic enamel paint (d) Repairs to aviation obstruction lights (e) Writing of details such as tank capacity, Date of cleaning etc with white enamel paint over the black painted surface. (f) Distempering the water surface of OH tanks/sumps using weather proof distemper with two coats.

All as per item No.38 here in before but OH reservoir of capacity 50,000 gallons complete all as specified and directed.

All as per item No.38 here in before but OH reservoir of capacity 5,000 litres complete all as specified and directed.

Supply only bleaching powder stable grade conforming to IS specification No 1065/1989 with minimum available chlorine percentage of mass 33.5% and slab percentage Nil complete all as specified and directed.

M&L labour in repairs for replacement of UG sump cover made out of 3.15 mm thick MS fabrication sheet with base frame of suitable size to the existing size made of 50 X 50 X 6 mm MS angle iron frame fixed in UG sump/tank and pit cover fixed to frame with hinges including locking arrangement, painting complete with 2 coats synthetic enamel paint and a coat of red oxide primer all as specified and directed

M&L for fabrication of MS ladder of suitable length and MS angle iron size to the existing size for maintenance of UG sump/tanks made out of 50 X 50 X 6 mm and fixed properly to the bottom of UG sump with PCC properly and fixing arrangement at top, painting complete with 2 coats synthetic enamel paint and a coat of red oxide primer all as specified and directed

M&L for steel work for covering of wells as a frame work complete with welding and nut, bolts washers and necessary fabrication work and similar items including taking down the existing unserviceable items and painting new surface with two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed.

Taking down the existing unserviceable Nylon mesh and supply and fix new Nylon mesh heavy grade clamped on vent pipe on UG sump/ Well with MS clamp 20mm x 3mm with two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed.

EVEREST ENGINEERING WORKS

M/s.Sai Agency

G.L.THIRUMALAI NAIDU AND COMPANY