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| 1 | Improving the capacity of 63MLD WTP at Chowara by replacing existing Rapid sand filter media with Dual media filter using Anthracite after repairing the damages in filter bed 6&7 and allied works |
| 2 | Supply of Anthracite as per standard specification, properly graded and tested by the supplier specifying the source of material and quality commensurate to the following specifications: Sp. Gravity : 1.45 - 1.55, Uniformity coefficient: 1.5, Bulk density : 0.73 -0.75 T/m3, Hardness : 3MOH, Hard grove : 44-55, Carbon content : > 90% above, Ash : 3% -4 %, Volatile : 5 % - 7%, Solubility : 1.5% in 10% HCl/10% NaOH for 24 Hrs, certification including all cost, taxes, conveyance to site, loading and unloading and stacking etc. complete ,certificate to beproduced from approved institutionbefore the execution of work as directed byof departmental officers. |
| 3 | Removing filter media from the filter beds without making any damages to the existing structures and back manifolds and stacking at a safe and convenient place for segregation process and as per the directions of the department officers etc. complete. |
| 4 | Washing Filterbed using brooms, brushes and bleaching powder by engaging coolies, scrubbing twice, washing and cleaning using fresh water, including side wall, floor slab , troughs,gullet etc ,disposing the the slurry / waste materilas away from the immediate premises and within the initial lead of 50m from the periphery of the plant, without causing any damage to the exististing strucutre and installations, charges including the operation of valves, conveyance and hire charges of tools and as per the direction of the department officers etc. complete. |
| 5 | Demolishing R.C.C. work manually / by mechanical means including stacking of steel bars and disposal of unserviceable material with in 50 metres lead as per direction of Engineer -in-Charge. |
| 6 | Demolishing cement concrete manually / by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in-Charge.Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix) |
| 7 | Extra for cutting reinforcement bars manually/ by mechanical means in R.C.C. or R.B. work ( Payment shall be made on the cross sectional area of R.C.C. or R.B work) as per direction of Engineer-in-charge. |
| 8 | Charge for cleaning the surface of the twin bed type filter bed and manifold portionready for lining concrete as per the direction of the departmental officers including cost of labour charge and hire charge for tools. |
| 9 | charge for removing and stackingthe 75 mm PVC lateral pipesfrom the bottom of thefilter bed (single bed)as per direction of departmental officers at convenient location including labour charge and hire charge for tools |
| 10 | Dismantling the existing damaged blower pipe to the filter mediawithout any damage to the piping system and structure and stacking at a convenient place as per the direction of departmental officers |
| 11 | Supplying,conveying and fixing 150mm CI double flanged pipefor blower line offilterbed and jointing with existing line at topand fixingthe bottomwith manifold concretekeeping plumb, line and level as directed by the departmental officers. |
| 12 | Centering and shuttering including strutting, propping etc. and removal of form work for:Columns, piers, abutments, pillars, posts and struts |
| 13 | Permanent shuttering using SS sheet and angles for the reconstruction of manifold including cost of SS sheet 4mm thick and 40*40*6mm angles including fabrication charges conveyance and fitting including painting. |
| 14 | Reinforced cement concrete work in arches, archribs, domes, vaults, shells, folded plate and roof having slope more than 15 degree up to floor five level excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 ( 1 cement : 1.5 coarse sand: 3 graded stone aggregate 20 mm nominal size). |
| 15 | Steel reinforcement for R.C.C work including straightening, cutting, bending, placing in position and binding all complete upto plinth levelThermo - Mechanically Treated bars of grade Fe-500D or more |
| 16 | Drilling suitable holes in reinforced or plain cement concrete with power drivendrill machine to a minimum depth of 100mm upto 200mm in RCC beams, lintels,columns and slabs to introduce steel bars for sunshades/balconies includingfixing the steel bars in position using epoxy resin anchor grout of approvedmake but excluding the cost of reinforcement, all complete as per direction ofEngineer-In-Charge.Upto and including 12mm dia. |
| 17 | Providing, mixing and applying bonding coat of approved adhesive on chippedportion of RCC as per specifications and direction of Engineer-In-chargecomplete in all respect.SBR Polymer (@10% of cement weight) modified cementitious bond coat @2.2kg cement per sqm of surface area mixed with specified proportion of approvedpolymer |
| 18 | Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:1/2:3 (cement : 11/2 coarse sand : 3 graded stone aggregate 20 mm nominal size) |
| 19 | Supplying and fixing 75 mm pvc pipe 12.5kg/cm2 ISI mark with 12 mm dia perforations at 180mm c/c (2 rows) staggered(12 nos on each raw/pipe),and 3mm dia orifice at 200mm c/c at top of pipe with including cost of pvc end cap-12.5 kg/cm2, coupling if required for fixing in new manifold keeping line and level, orientation, including charges for fixing in manifold as per direction of departmental officers |
| 20 | Supplying and stacking for measurement of filter sand having effective size 0.45 to 0.70 mm and uniformity coefficient 1.30 to 1.7, of specific gravity in the range of 2.55 - 2.65 and hard and clean, free from clay, dust and other impurities including cost of materials, labour charges and conveyance of materialsas per the directions of the department officers etc. complete and as per CPHEEO specification Including testing at approved institution and certificate will be produced for verification. |
| 21 | Supplying Grit of effective size varying 6.35 mm to 3.2 mm for supporting media of filter bed |
| 22 | Supplying of 2 to 6 mm and 6 to 12 mm size fine pebble (pebbles shall be hard, clean, free from clay, dust and other impurities), stacking in standard heaps for measurement including cost, conveyance up to 5 km and labour charges for stacking, spreading, testing and as per the directions of the department officers etc. complete as per CPHEEO specifications. |
| 23 | Cleaning, drying and seiving the removed filter media and stacking the dismantled pebbles for reuse and spreading in the filter box in layers as per specifications and as per directions of the department officers. |
| 24 | Refurbishing the filter bed using dual layer filter media as per the design separately laying each grade of supporting gravel manually so that each pebble is placed in close contact with each other leaving maximum void space between and the smaller gravels above. The filter sand media and the Anthracite are placed above separately. |
| 25 | Conducting trial run of all the filter beds for a period up to 30 days, recording performance of filter in terms of quality, quantity of filtered water and length of filter run and providing required training to the operators of KWA for the trouble free functioning and maintenance of the filter beds |
| 26 | Fabrication, supply and erection of chute structure for filter bed to avoid turbulence in the filter bed. |
| 27 | Dismantling tile work in floors and roofs laid in cement mortar including stacking material within 50 metres lead.For thickness of tiles 10 mm to 25 mm |
| 28 | Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead. |
| 29 | 12 mm cement plaster finished with a floating coat of neat cement of mix: |
| 30 | ProvidingPVC filter Nozzle to be required spacing of 180mm c/cin one direction and 200mm c/c in other direction at the top ofconcrete manifold including fixing charge, cost of Nozzle,cost adaptor and connection pipe for embedding in pipe and connected accessoriesetc as directed by the departmental officers |
| 31 | Providing and fixing I st quality ceramic glazed wall tiles conforming to IS : 15622 (thickness to be specified by the manufacturer), of approved make, in all colours, shades except burgundy, bottle green, black of any size as approved by Engineer -in-Charge, in skirting, risers of steps and dados, over 12 mm thick bed of cement mortar 1:3 (1 cement : 3 coarse sand) and jointing with grey cement slurry @ 3.3 kg per sqm, including pointing in white cement mixed with pigment of matching shade complete. |
