SPECIAL REPAIR AND REPLACEMENT OF BOREWELLS AT OLD MH PUMP HOUSE AND DIV CAMP PUMP HOUSE AGAINST BER AT DINJAN MIL STN UNDER GE DINJAN

Amount

Mobilisation of accessories/tools/plants/equipment as per IS 2800: 2019 for construction of borewell of 600 mm dia bore hole using Rotary Drilling Method (Direct Circulation Method) with all minor accessories at site complete all as specified and directed. Note: The quoted rate shall be inclusive of shifting the accessories/tools/plants/equipment from one site to other for subsequent boring.

Drilling pilot bore hole of 200 mm dia by Rotary Drilling Method (Direct Circulation Method) as described in IS 2800: 2019 in any kind of soil strata including hard stone/boulder upto 60 metre depth below ground level, including compound/ powder like valmite, bentonite solution, local silty clay etc. to be required as per the site condition including collecting samples from different strata, preparing and submitting strata chart/ bore log all complete all as specified and directed.

Drilling pilot bore hole of 200 mm dia by Rotary Drilling Method (Direct Circulation Method) as described in IS 2800: 2019 in any kind of soil strata including hard stone/boulder upto 120 metre depth and beyond 60 m depth below ground level, including compound/ powder like valmite, bentonite solution, local silty clay etc. to be required as per the site condition including collecting samples from different strata, preparing and submitting strata chart/ bore log all complete all as specified and directed.

Resistivity variation studies in bore hole drilled by electric logging of pilot bores by expert of Geology division to know the potential and temperature probes of drinking water by approved agency duly collaborated with strata chart/bore log complete all as specified and as directed.

Reaming 200 mm dia pilot bore to 350 mm dia bore upto 60 metre depth below ground level complete all as specified and as directed.

Reaming 200 mm dia pilot bore to 350 mm dia bore upto 120 metre depth and beyond 60 m depth below ground level complete all as specified and as directed.

Supplying, assembling, jointing and lowering steel casing pipe for water wells, plain ended, 250 mm nominal bore of pipe, 7.1 mm wall thickness, ERW (Electric Resistance Welded) type, Fe 450 grade of steel, externally coated with bituminous solution conforming to IS-4270-2001 and fixing in position in different depth as directed, butt welded complete all as specified and as directed.

Supplying, assembling, jointing and lowering steel casing pipe for water wells, plain ended, 200 mm nominal bore of pipe, 5.4 mm wall thickness, ERW (Electric Resistance Welded) type, Fe 450 grade of steel, externally coated with bituminous solution conforming to IS-4270-2001 and fixing in position in different depth as directed, butt welded complete all as specified and as directed.

Supplying, assembling, jointing and lowering plain slotted pipe, type A, screen made of low carbon galvanized (LCG) steel, 200 mm nominal size, 7 mm wall thickness, 1 mm slot openings conforming to IS-8110: 2019 and fixing in position in different depth as directed, butt welded complete all as specified and as directed.

S & F clamp for housing/ casing pipe, made of flat iron of hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 and as per IS 2800: 2019 including necessary bolts & nuts of required size complete all as specified and as directed.

S & F bail plug/ bottom plug with hook, 150 mm size, made of material as per IS 4270: 2001, conforming to IS 2800: 2019 complete all as specified and as directed.

S & F centralizer (centring Guides), made of flat iron and bar of hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 and as per IS 2800: 2019 including necessary bolts & nuts & welding of required size complete all as specified and as directed.

S & F well cap to the top of bore well, made of flat iron of hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 and as per IS 2800: 2019 including necessary bolts & nuts of required size complete all as specified and as directed.

S & F reducer, 200 mm X 250 mm size, made of material as per IS 4270: 2001, conforming to IS 2800: 2019 complete all as specified and as directed.

Development of tube well in accordance with IS 2800: 2019 and IS:11189 with compressed air method (open well method), to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed complete all as specified and as directed.

Determining specific capacity and efficiency and carrying out yield test as per IS 2800: 2019 using test pump and determining the yield capacity of bore well, the rate of pumping without lowering the water level below the top boundary of the aquifer, the top of the perforations, the recommended rate of pumping complete all as specified and as directed.

Disinfection of bore well as per IS 2800: 2019 using 200 milligrams of powdered chlorine compound per litre of water present in the well and left in the well for at least 8-12 hours to ensure elimination of any bacteria complete all as specified and as directed.

Supplying, designing, packing gravel, hard quartz (about 90-95 percent silicon dioxide (SiO2)) or other suitable material with an average specific gravity of not less than 2.5, not more than 10 percent by weight of the material shall have specific gravity of less than 2.25, not contain more than 5 percent by weight of calcareous material, not more than 2 percent by weight of thin flat or elongated pieces, the larger dimension not be more than 3 times the smallest dimension, sub rounded to rounded grains with least angular features, free from impurities such as shale, mica, feldspar, clay, dirt, loam, hematite, organic material etc. for the tube well in accordance with IS: 4097: 2019 as per the site requirement complete all as specified and as directed.

Carrying out testing of water sample of untreated water for all parameters mentioned in Table 1 to Table 6 of IS 10500: 2012 from NEIST Jorhat/ DRL Tezpur or any approved Lab as approved by the GE complete all as specified and as directed.

Supply and laying column pipe 100 mm bore both end flanged made out of GI tubing medium grade welded at end of column pipe cutting of groove to house submersible cable 3 core length of each column pipe not exceeding 3.10 metres complete all as specified and as directed.

Supply and fixing mild steel chain made of 6 mm dia rod of size 20 mm X 38 mm for holding submersible pump set/column pipe including pipe including necessary holding mild steel clamp nuts, bolts etc. complete all as directed.

M & L for flanged reflux valves of single door, swing check type (non return valves) of nominal pressure (PN 1.6) as per IS 5312 (Part 1): 2004, nominal size 100 mm including nuts, bolts, packing sheets etc. complete all as specified and as directed.

M & L for non-rising stem type sluice valves having double flanged for connections of nominal pressure (PN 1.6) as per IS 14846: 2000 of preferred materials, nominal size 100 mm including nuts, bolts, packing sheets etc. complete all as specified and as directed.

M & L for non-rising stem type sluice valves having double flanged for connections of nominal pressure (PN 1.6) as per IS 14846: 2000 of preferred materials, nominal size 150 mm including nuts, bolts, packing sheets etc. complete all as specified and as directed.

S & F submersible cable flat PVC insulation of type C and having PVC sheath of type ST2, flexible copper conductor, FR-LSH, 3 core of size 10 sqmm 1100 volts grade complete all as specified and as directed.

Supplying & fixing to walls and ceilings or laid in floors 100 mm nominal bore, medium grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. or for cable laying or not exceeding 10 sqm on plan and not exceeding 1.5 m in depth and getting out in soft/ loose soil complete all as specified and as directed.

Removing excavated material (soils) not exceeding 50 m and depositing where directed at a level n exc. 1.5 m above the starting point

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

M & L for construction of new valve chamber of size 900 mm X 900 mm X 900 mm including necessary earth work in any type of soil, PCC foundation M10(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate as in base concrete, brick work (one and half brick thick) in CM 1:6 with 20 mm thick cement plaster internally and externally in two coats of (12 mm and 8 mm) in cement mortar 1:4, 3 mm thick mild steel cover of structural steel of grade E165 as per IS 15911: 2010 riveted with angle iron (50 mm X 50 mm X 6 mm) frame of structural steel of grade E165 as per IS 15911: 2010, frame welded to base plate of size 150 mm X 12 mm and made of structural steel of grade E165 as per IS 15911: 2010, base plate fixed with 300 mm thick PCC coping in M15(Nominal Mix) using 20 mm nominal size graded crushed stone aggregate 50 mm X 50 mm X 6 mm mild steel washer, PCC benching 200 mm thick in M15(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate with necessary, welding, riveting, bolting including painting exposed steel surfaces with two coats of bituminous paint and embedded surfaces of steel with two coats of tar, finishing exposed faces of concrete surfaces and plaster surfaces with three coats of white wash as per drawing No. TD/EM/6 sheet Nos 1/2 & 2/2 of HQ CE Shillong Zone complete all as specified and as directed.

M & L for cement concrete in foundation, filling and mass concrete in M10(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate complete all as specified and as directed.

M & L for earthing complete with galvanised steel plate earth electrode 600 mm X 600 mm X 6 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to earthing lead of 32 mm X 6 mm galvanised mild steel strip by means of bolts, nuts, check nuts and washers of galvanised iron from earth plate to test point upto 7.5 metre including all as shown in electrical plate No. 3 of SSR Part I (2009) including necessary concrete chamber in cement concrete M15 (Nominal Mix) using 20 mm nominal size coarse aggregate, precast RCC cover slab in cement concrete M15 (Nominal mix) using 20 mm nominal size coarse aggregate of size 40 cm X 40 cm X 5 cm reinforced with 8 mm dia TMT bars @ 150 mm c/c with one handle for lifting made out of 8 mm dia bar, GI funnel, GI wire mesh filter, 20 mm dia GI pipe medium grade for watering, 40 mm dia GI pipe medium grade for protection of earthing lead, charcoal or coke and salt in alternate layers including necessary excavation and earth work in any type of soil/ strata including earth test point and testing complete all as specified and as directed by the Engineer-in-charge.

Supplying, installing, testing and commissioning chemical dosing pump, made of plastic, diaphragm type, capacity 02 litres per hour @ 10 kg back pressure comprising suction valve, delivery valve etc. operated on single phase AC electric supply, 230 V, 50 Hz complete with provision of base for installation of dozing pump complete all as specified and as directed.

M & L for cast iron pipes with spigot and socket ends, centrifugally cast, class LA, 150 mm bore in any length, laid in trenches complete all as specified and as directed.

Supply and laying cast iron fittings for spigot socketed pipes such as bends (any type radius and angle), tapers any type (straight, bends, 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 suitable for bore of pipe up to 150 mm complete all as specified and as directed.

S & F butterfly valve cast iron, PN 1.6, class 125, nominal size 100 mm as per IS 13095: 1991 complete all as specified and as directed.

S & F pressure gauge 4" dial 0 to 14 kgs rating complete all as specified and as directed.

Supplying & fixing to walls and ceilings or laid in floors 40 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Supplying & laying in trenches 40 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

S & F in repair 100 mm dia cast iron Venturi flanged type including nuts bolt & washers etc complete all as specified and as directed.

S & F hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 as in joist, channel, angle, or tee sections, fixed independently, without connecting plates, etc. (cut to ordinary lengths i.e. within 20 mm of the length indicated) complete all as specified and as directed.

Preparation of newly or previously untreated 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 zinc chrome primer complete all as specified and as directed by Engineer-in-Charge

M/S AUTOMOTIVE WORLD

M/s T D Sen and Co

Bidder Name

M/S AUTOMOTIVE WORLD