PROVN OF BORE WELL ALONG WITH IRON REMOVAL PLANT AND ALLIED WORK SERVICES AT AF STN BAGDOGRA

Fixing cost for MS reducer, bail plug, well cap, MS strip for centering, MS iron clamps, electric logging and sample strata box complete all as specified and directed.

Trial bore of 200 mm dia upto 200meter depth below ground level in any kind of soil strata including hard stone/boulder including electric logging, MS cap, MS flat iron clamps, reducing socket etc complete all as specified and directed.

Development of trial bore by reaming in following step:- (a)Reaming up to 525 mm for 60 RM from ground level including casing pipe of 200mm dia and thickness 8mm and pea gravel complete all as specified and directed.

(b)Reaming up to 525 mm from depth exceeding 60 metre to 200 meter including casing pipe of 200mm dia and thickness 8mm and pea gravel complete all as specified and directed.

Additional cost for slotted pipe of 200 mm dia in lieu of casing pipe of 200 mm dia complete all as specified and directed.

Development of tube well with compressed air and after with 25% extra capacity pump by pumping muddy water complete all as specified and directed.

Yield test for the bore well by continuously pumping for 16 hours to determine safe pumping yield complete all as specified and directed.

M&L for packing washed pea sized gravels round or sub-round of size not less than 6 mm dia as approved in packed thickness all around the housing and strainer pipe complete all as specified and directed.

M&L Submersible pump, electric driven 415 V, TP suitable for 200/250 mm dia bore well ( Casing pipe size 200/250 mm) supply and Install complete above 5 WHP upto 10 WHP inclusive of 40 metre long submersible cable and starter (1W+1S) complete all as specified and directed.

Supply and fixing steel rope flexible 8 mm dia with GI clamps, nuts, bolts, washer etc for fixing of submersible pump set complete all as specified and directed.

Supply, lowering, jointing & testing MS Black column pipe 3.0 mtr long, heavy duty, 80 mm bore, wall thickness 5.4 mm, both ends flanged, ISI Marked with heavy duty MS flanges not less than 16 mm screwed & welded inside & outside with pre-drilled holes including jointing with rubber gasket, nuts, bolts, washers & necessary grooves for facilitating submersible cables, steel ropes etc. The pipe shall be duly painted with anti-corrosive paint suitable for drinking water purpose complete all as specified and directed.

M&L for providing sanitary seal around the bore hole of size 3 m x 4m x 0.6 m thick with PCC (1:2:4) type B-1 (using 20 mm graded stone aggregate) in CM (1:4) including necessary formwork complete all as specified and directed.

Supply and fix sluice valve flanged of class 1.6 PN size supplied and Installed 80mm bore complete all as specified and directed.

Supply and fix sluice valve flanged of class 1.6 PN size supplied and Installed 100 mm bore complete all as specified and directed.

Supply and fix sluice valve flanged of class 1.6 PN size supplied and Installed 150 mm bore complete all as specified and directed.

Supply and fix Reflux valve with by pass arrangement 100 mm bore complete all as specified and directed.

M&L Pipe ductile Iron , S/S including specials Class “K-9” supplied and laid complete 100 mm (4”) dia complete all as specified and directed.

M & L brick masonry with brick valve chamber of internal size 1.2 M x1.2M x1.0 M with 23 cm thick wall in CM 1:6 including excavation, earth work in any strata & PCC 1:4:8 foundation type D-2, 75 mm thick including 20 mm thick PCC 1:2:4 type B1 in & plastering the internal surface with 10 mm thick cement mortar 1:4 providing 3.15 mm MS sheet chamber cover double opening arrangement center lock system with40x40x6mm angle iron frame duly painted with two coat of black bituminous paint over one coat of red oxide primer complete all as specified and directed.

Supply , install, testing and commissioning of cubical housing cabinet type LT panel board indoor type, platform/wall mounted factory made, totally enclosed dust and vermin proof openable from front side made out of 2.0 mm thick CRCA MS Sheet of suitable size and built upon suitable size angle iron frame work , having front hinged door, , earthing strips at rear side , bottom/side detachable gland plate complete with suitable size zinc plated and passivated nut, bolts , spring and washers. The cabinet and all members should be chemically treated with MSR solution for anticorrosive treatment The panel shall be Epoxy Powder coated and the control circuit diagram shall be with colour code multi standered conductor copper 1.5 Sqmm . The panel should be suitable for 415 volts , 50Hz , 3 phase 4 wire system and internal connection should be provided with aluminium strips of suitable size and necessary foundation work and comprising following:- Incoming Side (i) MCCB 4 Pole of capacity 100 Amp ,breaking capacity 25 KA with thermal release-01 Nos (ii) Digital type Voltmeter 0-500 volts, 3 Phase, 4 digit, high resolution, LED type with one side programmability -1 Nos . (iii) Ammeter digital type three phase CT operated onside programable with copper wound CT coil for three phases of suitable ratio & size class I accuracy, 0.5 VA burden, -01 Nos (v) Indicator lamp with holder key flush mounted, LED type Red, yellow, blue with toggle switch-1 Set Outgoing Side (i) MCCB 4 Pole of capacity 40 Amp , breaking capacity 16 KA with thermal release-03 Nos (ii) MCB 2 Pole of capacity 32 Amp breaking capacity 10 KA-2 Nos (iii) Star delta starter suitable for 10 HP Motor with all type of protection-02 Nos

Supply, connecting & fixing of submersible PVC insulated PVC sheathed 3 core flat copper cable of size 6 sqmm, 1100 V grade conforming to IS 694 : 1990 without any joint complete all as specified and directed.

Electrologing test by using suitable equipment for the bore hole before sinking/lowering of pipes, filters etc for assessing delineation of ground water from Central State Govt Agency or Central Govt/State Govt approval firm and report shall be submitted to GE for approval complete all as specified and directed.

M&L housing clamp made out of 100 mm x 12mm thick and 700 mm long flat iron for casing pipe of size 200 mm including necessary nuts, bolts and washers complete (two half piece) all as specified and directed.

Supply, installation, testing & commissioning of Iron remover plant complete with pressure filter, catalytic media, air compressor, back washing facility including RCC foundation of capacity 10000 gallon/hr including civil platform complete all as specified and directed.

Supply and dozing Chlorine tablets contained in plastic cylindrical sealed disposable sanitizer refill for disinfection of drinking water with arrangement for controlled release of disinfectant in water, suitable for operation through recommended dosing system. Replacement indication: visual & weight variation Water contact orifice design: Sealed when dry, exposed upon immersion complete all as specified and directed. Operation type: Non contact, non inhalatory. Cylinder dia: 2.5 inches ± 0.5 inches Cylinder height: Minimum 10.0 inches ± 0.5 inches

Testing of raw water & treated water from approved Govt lab for potability by doing chemical and bacteriological analysis as per norms of WHO and submission of test reports to the entire satisfaction of Engineer-in-Charge, complete all as specified and directed.

NOTES :- 1. The amount of schedule of credit shall be deducted from the total of this BOQ for arriving at contract sum.

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