SPECIAL REPAIR / REPLACEMENT OF BOREWELL AND OTHER CONNECTED WORKS AT BENGDUBI MIL STN UNDER GE BENGDUBI (3RD CALL)

Amount

M&L for drilling of trial bore of 250 mm dia upto 120 metre depth below ground level in any kind of soil, strata including hard stone, boulders by deploying Reverse Rotatry Rig to achieve desired depth including cost of consumable stores like fuel, lubricants, bentonite, collection of samples of strata materials as met during boring at each 2 metre depth and supply of strata chart (in duplicate) and all other desired information etc, complete all as specified and directed. Notes:- (i) Deployment, Erection and dismantling of boring plant after completion of the work including all arrangements for the transportation of the boring plant to site of work and from site of the work to outside MD Land, are to be made by the contractor at his own cost. The quoted rates shall be deemed to include for making arrangements & deployment of resources (material and labour) for the entire completion of the work and also for disposal of spoil from the site of work. Pits for collection of water and water for drilling tubewell shall be arranged by the firm / contractor at site at his own cost. (ii) For payment purposes, actual depth of boring which may be varied as compared to the depth as mentioned against item No 1 as per the orders of GE, at the accepted rate of above item, shall be considered. (iii) Drilling of trial bore shall be got executed by the Contractor from a Specialist Agency having requisite T&P and Machinery and such Specialist Agency shall be got approved by the contractor from GE before engagement of the same.

M&L for devolopment of trial bore by reaming upto 525 mm dia in the steps as mentioned below, upto and including a depth of 60 metres in steps from ground level by using Reverse Rotary method including disposal of spoil from the site of work, complete all as specified and directed :- (a) From 250mm to 350 mm dia (b) From 350mm to 450 mm dia (c) From 450mm to 525 mm dia

M&L for devolopment of trial bore by reaming upto 450mm dia in the steps as mentioned below, from depth exceeding 60 metres and upto 120 metres depth by using Reverse Rotary method, complete all as specified and directed :- (a) From 250mm to 350 mm dia (b) From 350mm to 450 mm dia Notes for Item No-2 & 3 : (i) Successful Development & Yield Testing of Bore Well to obtain desired safe yield as decided by the GE.will be whole sole responsibility of Contractor, if any failure during trial boring, development, testing or otherwise at any stage is occured, the contractor will provide new trial bore at any other location as decided by the GE at his own cost and arrangements and no payment for the unsuccessful trial boring, development of trial boring and for other works etc shall be admissible. (ii) For the payment purposes, the actual depth of development which may be varied as comparered to the depth as mentioned against items No 2 &3 as per the orders of GE, at the accepted rates of above items, shall be considered. (iii) Development of trial bore shall be got executed by the Contractor from a Specialist Agency having requisite T&P and Machinery and such Specialist Agency shall be got approved by the contractor from GE before engagement of the same.

M&L for carrying out & submission of electric logging in pilot bore for precise delineation of granular zones, as also the quality of ground water and also including submission of the report interpretation, complete all as specified and as directed. Note:- Electric logging shall be got carried out by the contractor from any Govt approved reputed agency as approved by the GE.

Supply, fixing & lowering in bore well 250mm bore MS ERW (Mild steel, Electric Resistant Welded) Casing Pipe of wall thickness not less 8mm (Pipe shall be of make : TATA/JINDAL/PRAKASH) confirming to IS:4270-1992 (with upto date amendments) duly ISI marked including jointing of pipes at the both ends by continious electric arc welding & also providing mild steel stiffners at the area of welded portion (duly welded to pipes), complete all as specified and directed. Note :- The pipes shall be of suitable length as per the site requirements and the external surfaces of the pipes shall be painted with two coats of anti corrosive bitumastic paint of approved brand suitable for drinking water, complete all as specified and directed.

Supply, fixing & lowering in bore well 200mm bore MS ERW (Mild steel, Electric Resistant Welded) Casing Pipe of wall thickness not less 8mm (Pipe shall be of make : TATA/JINDAL/PRAKASH) confirming to IS:4270-1992 (with upto date amendments) duly ISI marked including jointing of pipes at the both ends by continuous electric arc welding & also providing mild steel stiffners at the area of welded portion (duly welded to pipes), complete all as specified and directed. Note :- The pipes shall be of suitable length as per the site requirements and the external surfaces of the pipes shall be painted with two coats of anti corrosive bitumastic paint of approved brand suitable for drinking water, complete all as specified and directed.

Supply, lowering and fixing 250 mm bore low carbon galvanised (LCG) strainer (3 metre/6 metre long with perforations at 0.75mm to 01 mm as per requirement ) with minimum 6 mm wall thickness, confirming to IS 8110:2000 including jointing with casing pipe at both ends by continuous electric arc welding and providing mild steel stiffners at the area of welded portion (duly welded to pipes), complete all as specifed and as directed (Make: Johnson screen/other Manufaturer with BIS licence as approved by GE).

Supply, lowering and fixing 200 mm bore low carbon galvanised (LCG) strainer ( 3 metre/6 metre long with perforations at 0.75mm to 01 mm as per requirement ) with minimum 06 mm wall thickness, confirming to IS 8110:2000 including jointing with casing pipe at both ends by continuous electric arc welding and providing mild steel stiffners at the area of welded portion (duly welded to pipes), complete all as specifed and as directed (Make: Johnson screen/other Manufaturer with BIS licence as approved by GE).

Development of tube well using Air Compressure of minimum 350 psi, 600cfm pressure till sand/mud free water of the potable quality is obtained, complete all as specified and directed. Note :- All the T&P, Fuel, resources required for the developement shall be arranged by the contractor at his own cost and the quoted rates shall be deemed to include for all the above elements.

Development of tube well by pumping with 25% extra capacity pump (after completion of item 9) so as to achieve minimum safe desired yield as decided by the GE and also carrying out yield test for the bore well continuously during pumping to determine safe pumping yield as per IS requirements, complete all as specifed and directed. Note :- Yield testing shall be carried out in the presence of IEM and the results/records of the testing shall be signed by the IEM, GE, Engineer-in-Charge, JE and the rep of the contractor.

Supply, lowering, jointing and testing 100mm bore & 3 Metre long mild steel (ERW) pipe with wall thickness not less than 4.8mm (ISI marked with IS No 3581, Latest Edition with updated errata/amendments) and having both ends flanged duly provided with heavy duty mild steel flanges not less than 10mm thick, screwed & Welded inside and outside, having 08 Nos predrilled holes of required size including provision of jointing materials i.e. rubber gasket, nuts, bolts, washers, also painting the external surfaces of pipe with 2 coats of anticorrosive paint, complete all as specified and directed (Make of pipe: TATA/JINDAL/PRAKASH).

Supply, Fixing and testing, ISI marked (with IS No 14846-2000), heavy duty, class PN 1.6, CI body Sluice Valve, with brass spindle and one number hand wheel for 150mm bore pipe/fittings, with both ends flanged duly jointed at both ends with and including jointing materials i.e 3mm thick rubber gasket, bolts, nuts, washers etc of suitable size, complete all as specified and directed.

S&F, bronze butterfly valves, class PN-16, S.G. Iron body, without luys, Lever operated, S. G, Iron Disc, Nitrile / EPDM Rubber linning, ISI marked with IS No. 13095 for 100mm bore pipe/fittings, complete all as specifed and directed.

Dismentling and taking out carefuly of old pump set with column pipes from old defung borewell and lowering of old pump set and serviceable quantity of column pipes at new bore, complete all as specifed and directed. Note :- The materials/items (after use of serviceable quantity) shall be property of the deptt and shall be deposited in MES store yard of GE Bengdubi.

Supply, jointing and laying 150 mm bore in trenches/ in vertical postition/ alongwith the wall / on the surfaces of floor etc, centrifugally cast (spun) Ductile Iron Pressure Pipes, class K-9, in standard lengths, with Socket & Spigot ends, confirming to IS: 8329/2000 (with updated errata/amendments : ISI marked) with cement mortar lining inside the pipes& outside Zinc coating with finished layer of black bitumen/blue epoxy synthetic resin coating, with & including jointing & jointing materials i.e push on & rubber gasket as per manufacturer's instructions, complete all as specified and directed (Make of pipes : ELECTROSTEEL /JINDAL/TATA). Note :- Payment for DI fitings, Excavation & Earth work shall be measured & paid for separately.

Excavation in trenches in soft/loose soil not exceeding 1.5M wide and not exceeding 1.5 M in depth and getting out, including trimming the sides and forming bottom surfaces to required levels for laying of pipes, cable, etc, complete all as specified and directed.

Returning, filling in trenches including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick after laying of cable, pipe, etc, complete all as specified and directed.

Removing surplus excavated material (soil) to a distance not exceeding 50M and depositing where directed at a level not exceeding 1.5 meter above the starting point, complete all as specified and directed.

M&L for fittings (ISI marked) of size upto 150mm for DI pipes class K-9, with inside cement mortar lining and black bitumen external coating, such as bends, tapers, tee pieces, single branches, Y junctions, double junctions, connecting pieces, nuts & bolts, gaskets, flanges etc including push on rubber etc, complete all as specified and directed. (Make : OFDI Fittings :ELECTROSTEEL/JINDAL/TATA)

Supply only strata sample box (having internal dimention 1000mm x 600mm x100mm) made out of 20mm thick wought 1st class hard wood 'Shisham' having compatments with sutable wooden partitions for placing of strata samples, provided with 3mm thick glass cover, also provision of brass hinges, brass Hasp & Staple & including polishing to the exposed wooden surfaces, complete with samples of strata materials as met during boring at various 2 metre depth evenly, complete all as specified and dirceted.

Supply & filling pea gravel (free from dust, dirt or vegetable manure etc) of 5mm to 8mm size around the casing pipe of bore well including all leads and lifts, complete all as specified and dirceted.

Supply, lowering, connecting and testing submercible flat water proof cable, PVC insulalated ( heavy duty), 1100 volts grade, with multistranded copper coductor of size 3 core 10 sqmm, complete all as specified and dirceted.

S&F of Chlorine Dozing Plant, bucket type having FRP tank 145 litres capacity with FRP Lid & Level guage including provision of one number electric driven dosing pump of suitable capacity, Stirring Motor complete with Shaft & Impeller, 10 Metre long HDPE connecting pipe and one Number brass NRV of suitable size, complete all as specified and directed, Make: Ramco or equivalent make as approved by the GE.

S&F MS taper/reducer of size 250mmx200mm including jointing of taper with casing pipe of size 250mm bore and 200mm bore by continuous electric arc welding and providing mild steel stiffners at the area of welded portion (duly welded to pipes of 250mm bore and 200mm bore), complete all as specified and dirceted.

S&F MS threaded well cap with locking arrangement of approved quality for 10” dia MS pipe complete in all respects, as specified and dirceted.

S&F bail plug of approved quality for 8” dia MS bore pipe, complete in all respects, as specified and dirceted.

S&F MS centre guide of approved quality for 8” dia MS bore pipe, complete as specified and dirceted.

S&F including lowering of Steel Wire Rope, PVC insulated of size 12 mm dia of suitable size/ length as directed, with and including mild steel clamps, nuts, bolts and washers etc for holding column pipes / GI pipes of submersible pump sets, complete all as specified and dirceted.

M&L for testing of water sample of new boring for bacteriological and chemical testing (systematic analysis) from government approved laboratory as approved by the GE including submission of the report to the GE,complete all as specified & directed.

MUKHERJEE AND SONS

M/S G D CONSTRUCTION

Prahalad Rai