SPECIAL REPAIRS TO BOREWALL AT DAKSHINESWAR UNDER GE NORTH KOLKATA

Amount

Excavation in trenches not exceeding 1.5m deep and not exceeding 1.5m wide,n exc 10sqm on plan and getting out in soft/lose soil for laying of water pipe etc. complete all as specified and as directed.

Cutting of road / hard standing foot path not exceeding 0.30mtr wide and 0.60 mtr depth for laying of pipe line including making good with PCC (1:3:6) type C2 complete all as directed.

Returning, filling in, including spreading leveling, watering and well ramming in layer not exceeding 25cm in soft/lose soil complete all as specified.

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

M&L for laying of DI pipe with spigot and socketed ends suitable for push on rubber joint centrifugally cast , class K-9 , laid in trenches/ surface of size 100 mm dia including all fitting compete & all as directed by Engr-in- charge. Make:- Electro casting steel / Jindal / Sri pipes / Neco Centri / BIC / Jai balaji Industries / Tata Matliks / Tata Kabuto./ M/S Kiswok Industreies Pvt Ltd

M&L for rubber gasket joint (Tyton joint) for ductile iron pipe, 100mm bore with all material including testing complete and all as specified and directed.

M&L for DI fittings for 100 mm dia for spigot and socketed ends pipe like bends, tapers, tee pieces (single & double branch) any type and angle / radius and straight connecting pieces and reducer etc complete all as specified and directed by Engr in charge. Make:- Electro casting steel / Jindal / Sri pipes / Neco Centri / BIC / Jai balaji Industries / Tata Matliks / Tata Kabuto./ M/S Kiswok Industreies Pvt Ltd

Drilling trial bore hole by direct rotating rig method by 215 mm dia drill and drill upto 180mtr depth from GL for the following various depth below ground level through any type of strata including electro logging to find out potable water strata, from ground level up to 50 mtr depth & disposal of soil from the site , etc complete all as specified and directed by Engineer-in-Charge. (Note-:Expansion of borewell will be done after approval of electrologging report by GE.). (Note-: Trial bore will be done after submission of Central Ground Water Board report for water availability and same to be approved by GE. The contractor shall liaise with the CGWB officials in connection with site viste to locate the source / point for bore well and submit the report. The unit ratequoted is deemed to include this aspect. )

All as per item No. 8 above but depth exceeding 50mtr depth but not exceeding 100mtr.

All as per item No. 8 above but depth exceeding 100mtr depth but not exceeding 150mtr.

All as per item No. 8 above but depth exceeding 150mtr depth but not exceeding 180mtr.

Expanding the trial bore hole by same method as above but by 450mm dia drill upto 50mtr depth from GL and further expanding the same by 350mm dia drill from 50 to 180 mtr depth, for housing of 250mm X 150mm ERW MS Casing pipe of wall thickness 6mm(minium) for the following various depth below ground level through any type of strata, from ground level up to 50 mtr depth including disposal of soil from the site, . complete all as specified and directed by Engineer-in-Charge.

All as per item No. 12 above but depth exceeding 50mtr depth but not exceeding 100mtr.

All as per item No. 12 above but depth exceeding 100mtr depth but not exceeding 150mtr.

All as per item No. 12 above but depth exceeding 150mtr depth but not exceeding 180mtr.

M&L providing water logging test with electro logging equipment & required machinery for ascertaining / logging aquifers encountered in bore well and arranging and defining the water availability test giving test report of Geohydrologist from Govt. approved laboratory recommending water bearing zones, TDS of water etc. complete as directed by Engr-in-Charge.

Supply only sample strata box with glass cover 3 mm thick and having internal dimension 1000mmX600mm X100mm made out of 20 mm thick shisham plank with hinges hasp and staples including strata chart in complete all as specified and as directed .

Chemical, biological and portability testing of water samples taken from the bore complete all as specified and directed (Note -Test certificate obtain from Govt. approved laboratories having NABL accreditation, and shall be submitted by the contractor in original.)

Supply, lowering vertically and fixing in position ERW MS Casing pipe of wall thickness 6mm, 200mm bore of suitable length with bevellaed ends suitable for and including welded butt joints with electric arc welding, conforming to IS: 3589/1991 all as specified and directed. Make:- TATA/ SAIL/ GAJANAN / Surya Roshni Ltd / Jindal steel / Prakash / M/S Bhushan Power & Steel Ltd / BST Infra tech.

All as per item No 19 above but of size 150mm bore.

Supplying, lowering, assembling and fixing in position 150mm dia fibreglass strainer 6mm thick and 1mm soft size including joint MS ERW well pipe 150mm dia through MS adopter and socket to nearest socket at levels by welding as reqd and incl special sockets and center guide for straightening the pipe and connecting to MS pipe all as specified in IS 8110 complete all as specified and directed. Make of fibreglass strainer VMT or equivalent as approved by GE Note-: Slots shall not be less than 15% of total surface of slotted pipe and slot dia shall not exceed 1.00mm dia).

S&F bail plug conforming to relevant IS (ISI marked) made out of ERW MS pipe, 150mm bore with 6mm (minium) wall thickness.

M&L for Supply, pouring / packing the surrounding of casing pipe with pre-gravel(sub-rounded to rounded) of 2mm to 4mm thick of approved quality through the tube assembly complete all as directed by Engr-in-Charge.

M&L for cement sealing of saline water strata level with mixture of cement, bentonite & clay in the ratio of (1:1:8) to depth of 10mtr and or to the required depth and angular space and thickness (using quick setting cement) complete all as directed by Engr- in Charge.

S&F well cap for 200 mm bore ERW 6mm thick casing pipe, made out of 6mm thick MS sheet with locking arrangement. (Note-: After completion of work the cap will be used to keep the tube well closed until the pump set is installed and thereafter as and when required. Make:- TATA/ SAIL/ GAJANAN / Surya Roshni Ltd / Jindal steel / Prakash / M/S Bhushan Power & Steel Ltd / BST Infra tech.

Development of tube well by air compressor and diesel driven turbine pump for least 24 hour and till the time clean water of portable quality free from sand / mud is obtained and including carrying out yield test of tube well consecutive two days giving rest of 2 hour after every 8 hour of continuous run and as directed by Engr-in -Charge. Note: (i) The development of the tube well by over pumping should be done for 15% to 25% higher discharge than expected discharge from the tube well. The final discharge should be free from sand / mud with maximum tolerance.

S&F MS clamps made out of MS flat iron 65x10mm of suitable length with suitable size made to shape fabricated including drilling holes for fixing of GI / SS nuts, bolts and washers suitable for 250mm dia bore housing/casing pipe including one coat of black bituminous paint over a coat of zinc chrome primer complete all as directed by Engr-in-Charge.

S&F 250 X 150mm dia MS ERW reducing socket of wall thickness not less than 6 mm for fixing vertically the casing pipe in bore. Make:- TATA/ SAIL/ GAJANAN / Surya Roshni Ltd / Jindal steel / Prakash / M/S Bhushan Power & Steel Ltd / BST Infra tech.

M&L PCC (1:2:4) type B-1 (using 20mm graded crushed stone aggregate) in surrounding of housing pipe of required size including embedding housing clamp including necessary form work and earth work. The top and side of block shall be finished with 5mm thick plastering with cement mortar (1:3) complete all as directed by Engr-in-Charge.

S&F heavy duty PVC insulated and PVC sheathed submersible cable with multi stranded copper conductor of size 4 sqmm 3 core, 1100 volts grade complete all as specified and directed. (Make :Havells / Gloster Cables / KEI Industries Ltd / Asian [RPG] / CCI / Polycab / Finolex / Standard / HPL/ RR Kabel.

Supply, fixing, testing of Submersible pump set of discharge capacity 36 CUM/Hr @ 58 Mtr Head coupled with motor of capacity 12.5 HP/9.3 KW, 3 phase 415 Volt complete with connections and all fixing arrangements with column pipe of bore complete etc and all as specified and directed by Engr-in-Charge, Make:- Pump type : BPD/273/8A and motor type - UMA/150 (9/22) of make KSB or equivalent model of - (KIRLOSKAR/CROMPTON GREEVES.). Note:- (i) Test Certificate & Gaurantee / Warranty Certificate mandatory before claiming Payment. (ii) Testing of pump in all respects is mandatory before completion.

M&L for GI heavy grade Column pipe screwed, 100 mm nominal dia, in 3 mtr length with GI flanges screwed and welded both ends, flanges fabricated from 12mm thick GI plate with 2 Nos slots of 30X13 mm cut on each sides for drawing of submersible cables, 4 Nos GI ribs of 6 mm thick for each flanges welded to the pipe as reinforcement complete all as specified and as directed. Make:- Prakash / Utkarsh Tubes Ltd / Jindal / Zenith / Bansal / Nezone / M/S BST Infratech Ltd / TATA.

S&F heavy duty cast iron sluice valve in position double flanged 100 mm dia complete with brass spindle,Non rising Type, iron wheel handle clock wise closing, rubber or fibre board gasket joint with drilled hole flanged heavy duty PN 1.6 , Non rising,conforming to relevant IS specifications with ISI mark and all as specified and as directed. (Make: Upadhyay / Kirloskar / Zoloto / Veenus / Leader).

S&F heavy duty non return valve cast iron installed on 100 mm dia DI pipes conforming to relevant IS specifications with ISI mark and all as specified and as directed. (Make: Upadhyay / Kirloskar / Zoloto / Veenus / Leader / Kartar/ Rmco . ).

S&F pressure gauge of range 0-10 kg /sqcm dial type of size on rising main including all fixing accessories, fixing and testing complete and all as directed. Make:- HPL / L&T / C&S / /AE / Schneider / BCH

M&L for provision of a tripod stand over the borewell for lifting / lowering of submersible pumpset & column pipes & made from 100 mm bore heavy grade GI tubing with flanged legs embedded in PCC foundation with (1:3:6) mass concrete, each leg at 8 mtr distance from borewell & the vartex / peak of the stand should be at a height of 5 mtr above the edge of casing pipe & fastened together with 16mm steel bar / long bolts including necessary drilling, bending, turning, welding work including painting to rustable surface including one heavy duty chain pulley 5 ton capacity with protective hood over the tripod stand & all as directed by Engg in Charge.

M&L for cutting of existing 100/150/ 200 mm bore CI rising main and inserting CI flanged Tee equal of 150 mm bore connected to suitable CI tail / connecting pieces for integration with new raising main including provision of requisite lead joints, rubber or fibre board gasket joints including all other accessories for fixing socketed connecting / tail pieces at required spacing and fixing complete all as specified and directed. (Note: All materials including CI fittings heavy grade to complete the connection in all respect is included in the unit rate quoted.)

Supply and fixing including connection/ testing and commissioning fully automatic star delta Panel type starter (comprising of Ammeter, Voltmeter, RYB indicating lamp etc) AC 3 Phase 415 Volt 50 Hz enclosed in steel sheet enclosure suitable for 10 to 17.5 HP motor having range 17 to 25 Amps after taking down the old one complete all as specified and directed. ( Make-: C&S/ L & T/ Havells/ HPL)

S&F XLPE insulated, PVC sheathed, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross-sectional area 16 sqmm 4 core. Make:-Havells / Finolex / Nicco / KEI / Polycab / RR Kabel Ltd / HPL /

Supply and lay sub class 'B' bricks laid dry in trenches for cable protection laid with its longitudinal axis perpendicular to the cable axis complete all as specified and as directed

Material and labour for sand cushioning with clean dry sand in trenches for cable protection complete all as specified and as directed. Note:- Punned depth only shall be measured and paid.

PUTUL CONSTRUCTION CO.

SEN ELECTRIC WORKS

S Majumder and Construction

SOMIK DAS

RADHA ENTERPRISE