REPAIRS AND MAINTENANCE OF RG FILTER MEDIA AND CLEANING OF OH TANKS UG SUMPS ALONGWITH CONNECTED WORKS AT MASIMPUR MILITARY STATION UNDER GE SILCHAR

Amount

M&L for taking up filter media viz. sand and gravel from filter bed, screening, segregating, sorting and stacking out serviceable gravel for reuse and disposing off unserviceable media to a distance of 50m including scrapping with wire brush and cleaning the filter media, ceramic tile floors, walls, etc. entirely and washing clean with water complete all as specified and as directed

Supply and lay in alternate designated layers of required thickness the following as in filter media as per drawing complete all as specified and as directed

Gravel of size 20 to 40mm

Gravel of size 6 to 20mm

Gravel of size 3 to 6mm

Coarse sand of size 0.45 to 0.55mm

Fine sand of size 0.35 to 0.45mm

Labour only for reusing / relaying of usable gravels in designated layers as in filter media bed complete all as specified and as directed Note: Serviceable gravels obtained from taking out hereinbefore shall be washed clean and used under this item

M&F for testing the functioning of filtration system after necessary charging through Govt. accredited testing agencies as approved all as per relevant IS complete all as specified and as directed Note: All test results shall be submitted by the Contractor on claiming payment against this item

M&L for desilting and cleaning of open storm water drain 2m deep, 0.6m wide, by removing either by mechanical or manual means, the exiting slush/hardened silt/sludge/ any other hardened debris accumulated over a period, transportation and depositing at a point within a lead exceeding 50m but not exceeding 100m, spreading, dressing and leveling the heaps to a level not higher than 1m level including all tools, tackles, equipment, labour, etc. complete all as specified and as directed

M&L for suitably closing inlet valves and cleaning jack well (low lift) by taking out mud, silt, solid waste materials, foreign materials, etc. by mechanical / manual means as required from 20m depth and cleaning thoroughly with clean water and applying bleacing powder including making alternative arrangements with accessories for undisturbed supply of water from river to aerator and removing all waste materials to a distance not exceeding 50m complete all as specified and as directed

M&L for cleaning of internal surfaces of RCC semi-underground / underground sump / reservoir by scrubing the surfaces with the help of coir brush, jute cloth and flushing out / wiping clean all the accumulated mud / silt inside the tank, cleaning and disinfecting the surfaces by applying suitable approved chemical solution @0.2kg/sqm then applying two coats of lime wash on all internal surfaces and one coat of cement paint on external walls like wall, ceiling, floor, etc. and writing tank number, capacity of tank, date of cleaning with white synthetic enamel paint over a black synthetic enamel paint base (of suitable dimensions) with size of letter 4" height and as detailed hereafter complete all as specified and as directed at various locations of the following capacities : (a) On commencement both inlet and outlet including drain outs shall be properly sealed to check passage of mud, etc. into pipe lines, etc. (b) Water shall be completely bailed out (c) Accumulated mud, silt, foreign matters , etc. shall be removed manually and deposited in designated areas (d) The wall and floor including dome areas shall be cleaned by jet water sprays, using rotary pressure jets and approved claensing agents, sludge shall be removed completely by rubbing with brushes (e) The tanks shall be disinfected and made bacteria free with FOA/WHO approved chemicals

100000 Gallon at Srikona Pump House

70000 Gallon at Main Pump House, Kalibari

40000 Gallon at Main Pump House, Kalibari

20000 Gallon at Srikona Pump House, Kalibari

15000 Gallon at ARO, Silchar

10000 Gallon at Srikona Pump House

10000 Gallon at NCC Silchar

M&L for cleaning of internal surfaces of overhead tank / reservoirs including staging to a height approx 40 to 60 feet, etc. by scrubing the surfaces with the help of coir brush, jute cloth and flushing out all the accumulated mud / silt inside the tank, then applying two coats of lime wash on all internal surfaces like wall, ceiling, floor, etc. and writing tank number, capacity of tank, date of cleaning with white synthetic enamel paint over a black synthetic enemal paint base (of suitable dimensions) with size of letter 4" height and as detailed hereafter complete all as specified and as directed of the following sizes: (a) On commencement both inlet and outlet including drain outs shall be properly sealed to check passage of mud, etc. into pipe lines, etc. (b) Water shall be completely bailed out (c) Accumulated mud, silt, foreign matters , etc. shall be removed manually and deposited in designated areas (d) The wall and floor including dome areas shall be cleaned by jet water sprays, using rotary pressure jets and approved claensing agents, sludge shall be removed completely by rubbing with brushes (e) The tanks shall be disinfected and made bacteria free with FOA/WHO approved chemicals

35000 gallons at Lorry point

20000 gallons at Bde Cmdr Mess

15000 gallons at NCC Silchar

M&L for cleaning of internal surfaces of RCC sedimentation tank 30,000 gallons capacity, at any position in any location, with the help of coir brush, jute cloth and flushing out all the accumulated mud / silt inside the tank, then applying two coats of lime wash on all internal surfaces like wall, ceiling, floor, etc. and writing tank number, capacity of tank, date of cleaning with white synthetic enamel paint over a black synthetic enemal paint base (of suitable dimensions) with size of letter 4" height complete all as specified and as directed

S&F cast iron non-return valves, 250mm dia, both sides flanged and drilled with holes for bolts and nuts, etc. including flanged joints with 2Nos. rubber type insertion gasket joints, bolts, nuts and washer, etc. by cutting the existing pipe where required, welding of flanges including taking out and disposing off old unserviceable valves complete all as specified and as directed

S&F sluice valve, 300m dia, cast iron body class PN 1.6, ISI marked, conforming to IS: 14846, both ends fanged with brass spindle and brass check nuts with caat iron hand wheel including jointing material like rubber insulation sheet 3mm thick, bolts, nuts and fixed to pipe line, including testing on installation and taking out and disposing off old unserviceable valve complete all as specified and as directed

M&L for preparation of surfaces by scrapping, rubbing with sand paper, etc. of old steel/cast iron surface of any description over 10cm in width or girth, not otherwise described and painting with two coats of synthetic enamel paint (tint as approved) including all necessry staging, scafolding, etc. as required complete all as specified and as directed

M&L for plain cement concrete 1:3:6 (type C-1) using 20mm graded stone aggregate as in padding, bases, foundation filling, mass concrete, etc. complete all as specified and as directed

M&L for brickwork with sub-class 'B' bricks, straight or curved on plan exceeding 6m mean radius built in CM (1:6) complete all as specified and as directed

M&L for rendering 15mm thick in cement mortar (1:4) on fair surfaces of PCC / brick masonry wall, pillars / concrete surfaces, etc. finished even and smooth without using extra cement complete all as specified and as directed

m/s builders and suppliers (BID ID -3144612)

MS AFTAB LASKAR (BID ID -3150560)