A/R and M/O in Building in Education wing division during 2026-27. SH Rehabilitation of existing old conventional type Rain water Harvesting Pits in School Buildings in NDMC Area under Education wing

Cleaning, deisilting and rejuvenation of existing Rain Water Harvesting Pit of any size as per site condition including removal of accumulated silt, old filter media, disposal of malba, refilling with fresh graded material complete as per direction of Engineer-in-Charge. 1.1 Opening RCC cover slab/manhole cover carefully and refixing after completion.

Removing deposited silt/sludge manually from pit chamber including Taking out old stone aggregate/boulders, filter media etc manually from pit including lifting and stacking 50meter lead from the site all complete as per direction and entire satisfaction of Engineer Incharge.

Refilling the old stone aggregate/boulders etc in RWH pit manually after washing and placing in position as required at site including all lead and lift all complete as per direction and entire satisfaction of Engineer Incharge.

Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq.meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground, all complete as per direction of Engineer-in-Charge. With cement mortar 1:4 (1 cement : 4 fine sand).

Supplying, filling, spreading & leveling stone boulders of size range 5 cm to 20 cm, in recharge pit, in the required thickness, for all leads & lifts, all complete as per direction of Engineer-in-charge.

Supplying, filling, spreading & leveling gravels of size range 5 mm to 10 mm, in the recharge pit, over the existing layer of boulders, in required thickness, for all leads & lifts, all complete as per direction of Engineer-in- charge.

Supplying, filling, spreading & leveling coarse sand of size range 1.5 mm to 2 mm in recharge pit, in required thickness over gravel layer, for all leads & lifts, all complete as per direction of Engineer -in-charge.

Providing and fixing of non-wown Geotextile having thickness of 400gsm, having minimum tear strength, length and width puncture strength made out of long fibers to hold the modulars and protect liner including cutting, sizing, needle punched for high porosity and proper percoloation complete as per entire satisfaction of engineer-in-charge.

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by EngineeEducationn-charge, beyond 50 m initial lead, for all leads including all lifts involved.

Providing and placing in position 100 mm thick factory made machine batched & machine mixed Precast RCC Rectangular Covers on drains of footpath of various sizes, of M-25 grade cement concrete for RCC work, including cost of centering, shuttering, reinforcement of 8 mm dia TMT bars of Fe 500 grade @ maximum 100mm c/c on both ways , neat cement punning on finished surface, properly encased on all edges with 1.6 mm thick , 100 mm wide MS sheet duly painted over priming coat , reinforcement to be welded at edges with MS sheet and providing 2 Nos. 12 mm dia bar for hooks etc i/c cost of cartage, all leads & lift, handling at site etc. all complete as per direction of Engineer-in-Charge.