Water Resources Development Directorate Tender

b) Calcium Hypochloride

c) Hexamata Phosphate

Labour charges for pouring acid in requisite quantities in perforated cotton bag & submerging the bags within the tubewell at differeft stages of strainer with the help of string over night, weeping and their mixing and string the acid with surge block by air Compressor ( including back pressure) L.S.

Development of tubewell with 350 cfm 150 psi capacity air compressor by surging and backwashing for minimum 15 hrs including lowering of eduction pipe, air pipe etc. upto required depth as per direction of Engineer-in-Charge including hire and transport charge of Air compressor and other necessary tool and plants and also cost of fuel/lubricants for air compressor.

Labour charges & other charges for lowering of drop pipe 7.5 cm. or 10 cm. dia for choke clearance & detection of parted point (for parted tubewell) on fitting necessary flanges buckets & other attachment as may be required & withdrawing of the same after completion of work as many lifting & lowering required during the work without damaging any departmental material includinglowering of sounding wire time to time as and when required. This includes labour & other charges for erection of scaffolding for lowering & withdrawing drop pipe. (i) Upto 60 metre depth.

(ii) Beyond 60 metres upto 150 metres.

Labour charges & other charges for clearing of parted particle like sand and gravel & foreign materials like brick bats etc. if any from inside the tubewell assembly from different depth adopting suitable method including use of suitable type of cutter for loosening & breaking the deposited materials on subsequent operation of air compressor of suitable capacity with gradual & time to time lowering of compressor pipes, drop pipes etc. for required hours till the chockage is cleared upto the satisfaction of Engineer-in-Charge. (The rate included all labour charges & running cost of machinery but excluding lowering of drop pipe & other tools and plants but included labour charges for lower cutter, air pipe etc. to the required depth as needed. (ii) Beyond 60 metres upto 150 metres

Instalation of submersible electro motor pumping set of following capacities by using necessary requisite, tools and plants by lowering the same within the tubewell housing pipe upto the following depth as per direction by fitting, fixing column pipes and other accessories, fixtures with necessary nuts, bolts and washers and suspending the entire assembly of pump set vertically by fixing the same supported by M.S. clamps over the top of housing pipe, binding the motor cable with each column pipes and drawing cable upto pump controller/starter point including opening out of the top cap of housing pipe of the tubewell and testing of motor both in loading as well as in unloaded condition before and after installation of the same. (The rate is inclusive of hiring charges of tools & plants.) (a) 100/150/200 cubic metre her hour capacity electro motor pumping set. (ii) Length of pump assembly of any length exceeding 18 metre length.

Labour charges for fitting, fixing and laying where necessary of following M.S/ G.I. pipes & accessories (to be supplied departmentally) including transportation of the same and cutting, threading, jointing and making leak-proof threaded / flanged joint at site by using socket / rubber insertion, nuts & bolts etc maintaining proper alignment and level all complete as per direction of Engineer -in Charge. i) 350 mm dia M.S. ERW pipe

(b) Gas cutting to required size of 5 mm thick M.S. plate NSC channel etc. including labour charges, hire charges for all tools and plants. (i) 350 mm dia M.S./G.I. pipe ( Housing Pipe )

(c) Electric welding charges of 5 mm M.S. plate M.S. channels etc. and other member including hiring charges of all tools and plants. (i) 350 mm dia M.S./G.I. pipe ( Housing Pipe )

Supply of gravel for use as pack in tube well of 2 mm to 4 mm. size and gravel treatment of tubewell (as per IS: 4097) including screening, washing, cleaning etc. of the gravels at the site, all complete as per direction of the Engineer-in-Charge. ii) For site at any district of West Bengal upto 180Km distance from quarry

ADD GST @ 18% [ Except Sl No 3 ]

ADD LABOUR WELFARE CESS @1%