CLEANING AND REPAIR/REPLACEMENT OF DAMAGED SEWAGE LINES, MANHOLES, SUMPS AT KANCHRAPARA MIL STATION

Amount

Cleaning and de-sludging, excreta, night soil etc of existing septic tank, soak well and sewage sump completely of solid/liquid sludge by pumping or manually from inside the septic tank, soak well and sewage sump and removal of sludge and depositing in excavated pits (required size and depth) exceeding 50m but not exceeding 100m. Top layers of excavation pit covered by layers of 150mm depth earth spreading with bleaching powder @ 500 gm per Sqm for disinfections purpose complete all as specified and directed.

De-sludging/de-silting and cleaning of existing manholes and gully traps etc of any depth including taking out sludge/ slit and other foreign materials from manholes and gully traps of any size and staking the removed silt/sludge and depositing in excavated pits (required size and depth) exceeding 50m but not exceeding 100m including taking precautionary measured such as safty belts, cell torch for lighting inside the manholes and gully traps, etc. Top layers of excavation pit covered by layers of 150mm thick earth spreading with bleaching powder @ 100 gm per Sqm on the slit/ sludge to remove to avoid bad smell and disposal of slit/ sludge by transport upto 50m complete all as specified and directed.

Systematically cleaning and de-silting/de-sludging of blocked sewage/ waste pipe line 200/300mm dia of any description by rodding with using steel rod or split bamboo sticks thoroughly from both sides between adjacent manholes still to get clear flow of sewage line is observed, passing knots, kamti and disc of required size or pumping out liquid waste /sewage, plugging and diverting the flow to the drain if necessary and stacking the removed silt/sludge and depositing in excavated pits (required size and depth) exceeding 50m but not exceeding 100m. Top layers of excavation pit covered by layers of 150mm thick earth spreading with bleaching powder @ 200 gm per Sqm for disinfections purpose complete all as specified and directed.

Systematically cleaning and de-silting/de-sludging of blocked sewage/ waste pipe line 150mm dia of any description by rodding with using steel rod or split bamboo sticks thoroughly from both sides between adjacent manholes still to get clear flow of sewage line is observed, passing knots, kamti and disc of required size or pumping out liquid waste /sewage, plugging and diverting the flow to the drain if necessary and stacking the removed silt/sludge and depositing in excavated pits (required size and depth) exceeding 50m but not exceeding 100m. Top layers of excavation pit covered by layers of 150mm thick earth spreading with bleaching powder @ 200 gm per Sqm for disinfections purpose complete all as specified and directed.

Systematically cleaning and de-silting/de-sludging of blocked sewage/ waste pipe line 100mm dia of any description by rodding with using steel rod or split bamboo sticks thoroughly from both sides between adjacent manholes still to get clear flow of sewage line is observed, passing knots, kamti and disc of required size or pumping out liquid waste /sewage, plugging and diverting the flow to the drain if necessary and stacking the removed silt/sludge and depositing in excavated pits (required size and depth) exceeding 50m but not exceeding 100m. Top layers of excavation pit covered by layers of 150mm thick earth spreading with bleaching powder @ 200 gm per Sqm for disinfections purpose complete all as specified and directed. (Note for Item No. 1.00 to 5.00 : Excavation of trenches, disposal of surplus soil and bleaching powder is deemed to be included in the quoted unit rates however quantity of sludge portion only will be measured and paid. )

Loose filling with brick bats in filter bed gauge 80 to 150 mm in filter bed complete all as specified and directed. (Note : Material shall be obtained from itemn No. 8.00 below)

Demolition of breaking up drain pipe (salt glazed ware) set in cement mortar complete all as specified and directed.

Demolition of brick work or stone/boulder masonry, built in cement mortar or cement lime mortar including all quoins, arches, pillar etc but excluding ashlars facing dressed stonework & precast concrete articles complete all as specified and directed.

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth for foundation or for shafts, well, cesspits, pier holes etc not exceeding 10 Sqm on plan and not exceeding 1.5 mtr in depth and getting out in soft/loose soil complete all as specified and directed.

Excavation in trenches not exceeding 1.5 mtr wide and exceeding 1.5 mtr but not exceeding 3 mtr in depth for foundation or for shafts, well, cesspits, pier holes etc not exceeding 10 Sqm on plan and not exceeding 1.5 mtr in depth and getting out in soft/loose soil complete all as specified and directed.

Returning, filling in, including spreading leveling, watering and well ramming in layers not exceeding 25cm, soil complete all as specified and directed.

Removing surplus excavated materials to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting points in soft/loose soil complete all as specified and directed.

M&L for brick work with sub class 'B' bricks locally available best quality straight or curved on plan exceeding 6m mean radius, built in cement mortar (1:4) complete all as specified and directed.

Taking down cement plaster of any description on brick or stone or concrete surface of wall etc including raking out joints, hacking for key, scrubbing down with water etc complete all as specified and directed.

M&L for rendering 15 mm thick on fair face of brick works or concrete surfaces of walls with cement mortar (1:4) in two coats (10mm thick backing coat + 5mm thick plaster) mixed with WPC @200ml per 50 Kg of cement on 5mm thick plaster, finished the surfaces even and smooth without using extra cement complete all as specified and directed. (Note : WPC will be measured and paid separately under relevant item.)

Supply only integral water proofing compound liquid, ISI marked complete all as specified and directed.

M&L for applying three coats of white wash on ceiling surface including preparation of new plastered surface complete all as specified and directed.

M&L for PCC (1:3:6) type C-2 (using 40 mm graded crushed stone aggregate) as in foundation filling and mass concrete complete all as specified and directed.

M&L for cement concrete (1:2:4) type B1 (using 20 mm graded crushed stone aggregate) as in benching and forming channels in manholes including weathering, slightly roundeed or chamfered angles and throating complete all as specified and directed.

M&L for PCC (1:3:6) type C2 (using 40mm graded crushed stone aggregate) as in concrete bed to drain pipe 150mm bore including packing under and haunching against the side of pipe after they are laid and tested complete all as specified and directed.

Cutting into existing manholes for connecting new drain, making good to pipe and rendering, cutting out existing concrete B-1 (1:2:4) smooth finished and reforming benching as required for 150mm dia pipe complete all as specified and directed.

M&L for DWCPE (SN8) pipes, nominal dia 150mm laid in trenches for sewer network, fixed and jointed with integral socket or coupler and EPDM sealing ring (depending on pipe ends) as per manufacturer instructions complete all as specified and directed.

S&F for 110 mm bore PVC (SWR) pipes single socketed in any length with rubber ring joints laid in trenches or in floor including taking down old unserviceable pipe complete all as specified and directed.

S&F for 110 mm bore PVC (SWR) pipes single socketed in any length with rubber ring joints fixed to wall including taking down old unserviceable pipe complete all as specified and directed.

S&F for 75 mm bore PVC (SWR) pipes single socketed in any length with rubber ring joints fixed to wall including taking down old unserviceable pipe complete all as specified and directed.

S&F of 110 mm bore PVC (SWR) bends any radius provided with access door complete all as specified and directed.

S&F of 75 mm bore PVC (SWR) bends any radius provided with access door all as specified and directed.

S&F of 110mm bore PVC(SWR) branch pipe single, (single Y) equal or unequal with access door complete all as specified and directed.

S&F of 110mm bore PVC(SWR) junction single, (single T) equal or unequal providing access door complete all as specified and directed.

Demolition of existing broken/damaged manhole cover of surface area not exceeding 0.80Sqm and removal of debris from site complete all as specified and directed.

S&F of factory made precast reinforced cement concrete (1:1.5:3) type A0, (using 12.5 mm graded stone aggregate) as in manhole cover, surface area not exceeding 0.80Sqm, thickness not exceeding 10cm complete all as specified and directed. NOTE : Quoted rate deemed to be included for reinforcement not less than 1% of volume of concrete.

CHATTERJEE ENTERPRISE (BID ID -3122968)

M/S KARTICK CHANDRA CHAKRABORTY (BID ID -3122945)

NANDY ENTERPRISE (BID ID -3118131)