CWE(AF)/CHK/MNR/T-44 OF 2023-24

Amount

Lifting of submersible pump 30 HP along with column pipes 10 Nos and submersbile cable 16 sqmm from the old borewell at Pump house and cover up of old borewell hole by existing arrangement.

Drilling pilot bore hole of 250mm dia by reverse rotary rig machine unit in any kind of soil/rock including disposal of surplus soil/ rock to a distance n exc 50 mtr complete all as specified including deploying required rig machinery, T&P, equipments etc. complete including transporting of all materials like rig machine, tools & plants, collection of logical samples (drilling/ cutting) and to maintain drill time log book all as specified to a depth n. exc.190 mtr complete as directed. Note :- Incase failure of pilot bore (due to non availablity of potable water/sufficient yield/high iron content etc) boring location to be changed as per direction of accepting officer cost for the trial bore to be paid in respective item.

Reaming of 250 mm pilot bore hole of 250mm dia to 610 mm dia bore step by step in the manner as under to a depth upto 70 m from ground level. (i)250 mm to 350 mm (ii)350 mm to 450 mm (iii)450 mm to 550 mm (iv)550 mm to 610mm

All as per Sl item No. 3 above but to a depth exceeding 70 m and n. exc. 190 m from ground level. Notes for item No 2 to 4 (a) The following tests are to be carried out and reports as mentioned to be submitted by the contractor which is deemed included in the rates quoted:- (i) Recording the well discharge during drilling by a 90° V-notch. (ii) Recording the water bearing horizon. (iii) Taking the sample of strata at every 3.0m internal and every change in strata and preparation of litho logs based on these samples. (iv) Preparation of drill time log and submitting to deptt. (v) Collection of water samples in bottles for all aquifers encountered. (vi) Carrying out aquifer performance test at constant discharge with drawn down and recovery reading. (vii) Interpretation of data and preparing/ submitting hydro scientific report required for designing of submersible pump. (viii) Yield test as specified.(paid sperately against item No 18 of BOQ) (b) The range of depth given for boring with a particular dia of drill is not firm and shall be decided on ground by GE as per site requirements. The change in upper or lower limit of depth of boring from ground level with a particular dia of drill will not amount to any deviation and rates quoted against these items is only applicable even if drilling depth varies from Sch 'A' and nothing extra is admissible on this account. (c) Item No. 4 shall be operated only when sufficient water is available in pilot bore vide item No. 2 (d) No payment is admissible if any bore is abandoned due to default of contractor. (e) Location of bore well shall be as per CGWB report which is already obtained by dept, copy of report shall be made available to the contractor. (f) After completion of development of bore well, a test report on sample of water to ascertain quality from a recognized institution/ laboratory shall be submitted to GE without extra cost. (g) Verticality test should be carried out by the contractor from authorised agencies and report should be in tolerable limit.

Supply and assembling including jointing, lowering and fixing in position ERW plain mild steel sheet casing pipe (seamless) 300mm nominal dia, 8mm thick conforming to IS-8110-2000 class 8.1.1, jointed and welded with coupler rings (welding shall be done through out the circumference of the pipe and coupler rings both sides) including material and labour for two coats of bituminous paint complete all as specified and directed. Note :- Length of each pipe to be provided in casing shall not be less than 2.4 mtrs except where pipe length required is less than 2.4mtr. Pipe shall be approved by GE before lowering.

All as per item No.5 here-in-before but 200mm bore with 5.6 mm to 6 mm thick sheet.

Supply and fix mild steel strainer slotted pipe 200mm nominal bore 5.4mm thick conforming to IS complete all as specified and as directed. Note :-(i) The size of slote shall be designed by the contractor based on aquifiers regularly arranged at the equal distance all around the slotted pipe so as to make the perforation area 15 to 20% of slotted pipe, (including, jointing, welding etc.,complete all as specified in item 4 hereinbefore) all as specified and as directed. (ii) Length of each pipe to be provided in casing shall not be less than 2.4 mtrs except where pipe length required is less than 2.4 mtrs.

Supply and fixing of socket reducer of size 14”x8” (350x200 mm dia) not less than 14 mm thick fixed at appropriate level including mild steel flat iron 40x6 mm (2Nos) on each joint extended 75 mm on each side complete all as specified and directed.

Supply and fixing bail plug of 8” (200 mm) made out of MS(ERW) pipe 8 mm thickness including 10 mm thick 'U' hook bars and welding and finishing properly complete all as specified and directed.

Supply and fixing of well cap suitable for 14” (350 mm bore) including welding and handle fabricated of MS sheet 8 mm thick including threading on top end of last piece of casing pipe left above GL complete all as specified and directed

S&F centering guide made out of 50x6mm MS flat iron on liner assembly all as specified and directed.

S&F two Nos MS flat iron 150mm x 15mm housing clamp for holding to 300mm dia housing pipe with 16mm MS bolt & washers including casting of PCC blocks 1:2:4 type B-1 using 20mm graded stone aggregate of size 1.20m x 1.00M including 50mm dia MS pipe 2 Nos each 1.5mtr long with cap plug and cap top for filling pea gravel including necessary excavation & each work in any type of soil complete all as specified and directed.

Supplying and packing washed pea gravel of size 3 mm to 5 mm free from dust, dirt or vegetable matters as per IS-4097, around the linear assembly to the entire depth of bore well complete all as specified and directed. (Note:- Pea gravel shall be stacked at site and measurement of stack shall be entered in MB with reduction of voids & bulkage portion of pea gravel. Payment shall be made after deduction of voids & bulkage of pea gravel)

Developing the tube well with 600 PSI, 500 CFM capacity air compressor as required until clear water is obtained including transportation, erection and dismantling of air compressor complete all as specified and directed.

All as per Sl item No. 14 as above but by means of OP unit (over pumping unit) at the rate 25% above 32 LPS discharge ie 40 LPS consisting of VT pump as required until sand free water is obtained complete all as specified and directed. (Note For item No 14 & 15- Log sheet of compressor machine shall be maintained and signed by JE, contractor & Engineer-in-charge.)

M&L for wooden strata sample box made out of 18 mm thick pre-laminated particle board and 12 mm thick BWP plywood with 25x25mm aluminum angle 2mm thick overall size of strata sample box is 1000 x 600 x100 mm deep with minimum 30 Nos. partition /compartments or more of minimum size 75 x 100 x 100mm deep with front float glass sliding type cover and with aluminum frame around 2 Nos, key hole plate of size 40 x 25 x 6mm thick complete all as specified and directed. Note :- (a) Name of tube well location and strata with depth shall be shown on chart and affixed in strata sample box. (b) Supply strata container (plastic) containing 30 Nos each of 100 grams capacity including filling with sample of strata of soil collected while drilling at 2 m interval or where there is change of lithology shall be provided with strata chart.

M&L Collection of water sample, carrying to approved analytical chemical laboratory for bacteriological, chemical and sanitary tests after the development of well complete all as desired by department to ensure the water is fit for human consumpution and impurity are less than the recommonded PPM as per ministry of health deparment. . Note :- If it is found not upto the standard limit, the firm should treat the same with bleaching powder and arrange for pumping out the water till the water becomes bacteria free and fit for human consumption .

M&L for Yield testing of the tube well for continuous to 16 hrs all as specified in particular specification and as directed to determine the safe pumping yield of tube well etc. complete all as specified.

M&L Electric logging in bore for continuous process delineation of granular zones as also the quality of ground water including report interpretation complete all as specified. (Note: Electric wire for logging including electric logging machine and its connected accesoris cost shall be deemed included in "Each Job' nothing extra will be paid on this account and payment will be made only after satisfactory report received and treated as 'Each Job'. In case of failure of electric logging the cost of testing shall not be paid to contractor)

Supply and fixing of connecting piece one end flanged and other end screwed duly welded 1.5mtr long MS column pipe 150mm dia bore for connecting column pipe and NRV of submersible pump 125/150mm dia complete all as specified and directed.

Supply, lowering and fixing MS column pipe screwed 150mm bore of class 'C' heavy duty 3.0 m in length having wall thickness not less than 7.1 mm electric resistance welded with MS flange heavy duty on both side confirming to IS and with provn of 8 nos holes welded all around with pipe for rigidness and 4 Nos ribs 10 mm thick including 2 mm thick rubber sheet of suitable size with nut, bolt and washer shall be confirming to IS and connecting complete all as specified and directed. (Note:- Payment of 3m length MS column pipe shall be treated as Each unit)

Supply and fix in repair PVC insulated & sheathed 1100 volts grade 3 core submersible flat cable of size 16 Sqmm flat type, multi stranded copper conductor including connection to motor and starter complete including necessary joint with M seal and brass ferrule as necessary all as specified and directed. Make: Havells/Polycab/Plaza/Finolex or equivalent in other make as as given in Appendix 'B'

Supply, fixing, jointing and testing of cast iron non return valve 150mm dia class PN-1.6, IS-14846 flanged ends complete with washer nuts/ bolts and rubber gasket complete all as specified and directed.

Supply & fixing of sluice valves 150 mm dia class PN-1.6, IS-14846 with flanged ends, stainless steel spindle and iron wheel including nut bolts and rubber packing complete all as specified and directed.

M&L centrifugally cast (spun) ductile iron pressure pipes 150 mm bore for water with socket & spigot ends confirming to IS 8329/2000 in any length for classification of K-7 suitable for rubber gasket push on with cement mortar lining inside the pipe with outside zinc coating as per IS 8329/2000 including DI fittings complete all as specified and as directed .Make: Electro steel/Tata/Jindal/Jai Balaji or equivalent in other make as as given in Appendix 'B' (Note :- Rubber gasket joint should be included in quoted rate).

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits,manholes, pier holes, for laying of pipes, UG cable etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft/loose soil complete all as specified & directed by Engr-in-Charge.

Returning filling in including spreading leveling watering and well ramming in layers not exceeding 25 cm in soft/loose soil complete all as specified & directed by Engr-in-Charge.

Removing excavated material n.exc. 50m and depositing where directed at a level n.exc 1.5 m above starting point complete all as specified & directed by Engr-in-Charge.

M&L for 100mm thick, cement concrete 1:2:4 type B-2 (using 40mm graded stone agg) as in floor and finish concrete surface even and smooth without using extra cement, complete all as specified and as directed.

M&L for 100mm thick, cement concrete 1:4:8 type D-2 (using 40mm graded stone agg) as in floor, complete all as specified and as directed.

M&L for RCC M-20 nominal mix using 20mm graded stone aggregate as in foundations, including rafts, footings, foundation beams, plinth beams, bases for columns, etc basement slabs, under-reamed piles and mass concreate etc complete all as specified and directed.

M&L for RCC M-20 nominal mix using 20mm graded stone aggregate as in columns, pillars, posts and struts etc complete all as specified and directed.

M&L for Form work to sides of concrete foundations, footings, bases of columns, raft and raft beams, sides and soffits (if any) of foundationa and plinth beams, and similar works vertical or to batter on fair finished surfaces foundation complete all as specified and as directed.

M&L for Form work to sides of columns, pillars, posts, struts, piers and stanchions on fair finished surfaces complete all as specified and as directed.

M&L for Mild steel TMT bars 10 mm dia and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire not less than 0.9 mm dia or securing with clips complete all as specified and directed.

M&L for Mild steel TMT bars 5mm dia and over upto and including 10mm dia in stirrups, spacers and binders and binding with and including mild steel wire not less than 0.9 mm dia or securing with clips complete all as specified and directed.

M&L for rendering 10 mm thick on fair faces of brick work or concrete surfaces in cement mortar 1:4 surface finished even and fair complete all as specified and directed.

M&L for preparation of new plastered surfaces of walls and applying two coats of cement base paint over a coat of primer complete all as specified.

S&F Roof trusses (framed), trussed, purlins, crane gantries, rails and fastenings and heavy bracket framing (Beam, tee, angle, channel or flat sections) including distance pieces, cleats etc complete all as specified and directed.

M&L for preparation of steel surfaces exc 10 cm width or girth and applying two coat of synthetic enamel paint over of coat of red oxide primer complete all as specified and directed.

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