A/R M/O Water Supply under Sub Division No. III, Swadeshnagar, NACD, APWD, Mayabunder during 2024-25.SW-Replacement of filter media for Water Treatment Unit at Jaipur under Sub Division No.III, Swadeshnagar, NACD, APWD, Mayabunder

Amount

By Manual Labour including loading, unloading and stacking for lead less than 0.50 KM

Sand, stone aggregate below 40 mm nominal size Lead - 50 m

Stone aggregate 40 mm nominal size and above Lead - 50 m

Cleaning of under ground sump, Over Head R.C.C. Tank ( independent staging) including disposal of slit and rubbish, all as per direction of Engineer-in-Charge. The cleaning shall consist following operations:- Tank shall be emptied of water by pumping & bottom shall be cleaned of silt and other deposits. Entire surface area of the sump shall then scrubbed thoroughly with wire brush etc. and pressure washed with water. (iii) Chlorination of RCC internal surface by liquid chlorine. The treated surface shall be dried using air jetting and all loose particles shall be removal from the surface. Finally the surface shall be treated with ultraviolet radiation etc. as per direction of Engineer-in-Charge.

Removal of silt up sand from the filter bed with the lift of 3.00 mtr and carraige by mechanical/manual means i/c loading & unloading and stacking for an average lead of 50 meters as per the directon of Engineer-in-charge.

Removal of old damaged stone aggregate of size from 63mm to 13.2mm from the filter bed with a lift of 3m and carriage by mechanical/manual means including loading & unloading and stacking for an average lead of 50 meters as per the directon of Engineer-in-charge.

Laying of Stone aggregate of different size under floors, watering, ramming, consolidating and dressing complete.

River Sand

Stone Aggregate 63mm to 45mm

Stone Aggregate 53mm to 22.4mm

Stone screening 11.20 mm nominal size (Type B)

Ananta Sadhukhan (BID ID -46752)