Retender - P. No. 74/2025-26 - Kasim Haji Drinking Water Scheme Related Works Ward 09 - Mangalam GP - under Annual Plan 2025 - 26

FILTER UNIT [FRP vessel 750mm dia., 3No]:

OD242206/2025-2026:Supplying and fixing PRESSURE SAND FILTER having 750mm dia. and HOS 1800mm or nearest and maximum thickness should not be less than 6mm with manhole and cover for easy inspection at top and an opening provision for media removing arrangement at bottom side with dummy arrangement capable of discharging water at 10,000 LPH with a capacity to with stand the operating head which is necessary to deliver water to OH Tank at 12.0 m height, with best quality suitable size Butterfly/MULTIPORT Valve for easy back washing ,rinsing and filtering. The unit should withstand a internal pressure of 10 Kg/Cm2 . The container should have a manhole with cover at top for easy inspection of the unit, provision for door/dummy at the bottom for media removal. The unit should be so installed at suitable point that the operation and maintenance is easy. Details of filter media are - The supporting media include Pebbles of 1.5' - 1'; Pebbles 0.75' - 0.5'; Pebbles 3/8' - 1/4; Silex Coarse 1/2' - 1/4'; Silex Medium - 1/4' - 1/8'. The filter media includes Silex Fine 8/16' and Quartz Sand 16/32'. The filter media should have good performance life for a minimum period of 3 yrs. The system should be compactible as per the site condition and other units including motor pump sets. The whole installed system will be under guarantee for 3 years from the date of commissioning. The technical details including drawing and specifications of the filter unit and accessories, O&M manual with guide lines for trouble shooting shall also be submitted in two set and trial run should be conducted as per the direction of Dept. officers.

OD242062/2025-2026:Design, manufacturing, installing and commissioning as per the technical demand and the site conditions and as directed by the engineer in charge for 1 No of IRON REMOVAL PLANT using 750mm dia. and HOS 1800mm or nearest and maximum thickness should not be less than 6mm with manhole and cover for easy inspection at top and an opening provision for media removing arrangement at bottom side with dummy arrangement capable of discharging water at 10,000 LPH with a capacity to with stand the operating head which is necessary to deliver water to OH Tank at 12.0 m height, with best quality suitable size Butterfly/MULTIPORT Valve for easy back washing ,rinsing and filtering. The unit should withstand a internal pressure of 10 Kg/Cm2 . The container should have a manhole with cover at top for easy inspection of the unit, provision for door/dummy at the bottom for media removal. The unit should be so installed at suitable point that the operation and maintenance is easy. Characteristics :- Effective size of iron removal media- 1.4mm - 0.6mm - Uniformity co efficient- 1.5 -2.0 – The supporting media include Pebbles of various sizes as mentioned under pressure sand filter – depth 20 cm – Grit of size-6.35 mm- 3.2 mm- depth 20 cm). The type of iron removal media includes either a combination of Katalox Light or MnO2 or a combination of BIRM & MnO2 (NSF approved) media based on the water characteristics. The filter media should have good performance life for a minimum period of 3 yrs.

OD242064/2025-2026:Supplying and fixing ACTIVATED CARBON FILTER - IGCL having size 750mm dia. and HOS 1800mm or nearest and maximum thickness should not be less than 6mm with manhole and cover for easy inspection at top and an opening provision for media removing arrangement at bottom side with dummy arrangement capable of discharging water at 10,000 LPH with a capacity to with stand the operating head which is necessary to deliver water to OH Tank at 12.0 m height, with best quality suitable size Butterfly/MULTIPORT Valve for easy back washing ,rinsing and filtering. The unit should withstand a internal pressure of 10 Kg/Cm2. The container should have a manhole with cover at top for easy inspection of the unit, provision for door/dummy at the bottom for media removal. The unit should be so installed at suitable point that the operation and maintenance is easy. using ,silex, activated carbon igcl 1050 iv, (KALPA )and with back wash duration 5 minutes , (Top and bottom FRP VESSEL Multi port Valve 45 NB size, strainer assembly) etc. complete with including all labour charges.

OD242067/2025-2026:Design, Supply and installation based on site conditions and as directed by the Engineer in-charge and commissioning of 1 No of CHLORINE DOSING SYSTEM with all necessary accessories. The chlorine solution shall be directly injected to the system at suitable point by using suitable chemical dosing pump having adjustable discharge up to 10 lit/hr at a delivery pressure of 15 kg/cm2 so as to maintain required residual chlorine in the treated water as per the norms including all accessories such as suitable angle stand to fix the pump set, best quality 100 liters PVC Tank to the correct alignment and wiring from existing panel board to the pump set by using power cables encased in PVC Conduit and trail running etc.

50.18.9.17.2:Providing and fixing PVC pipes including fixing the pipe with clamps/clips at 1.00 m spacing. This includes jointing of pipes with one step PVC solvent cement and testing of joints complete as per direction of Engineer-in-Charge 63 mm dia 4 Kgf/cm2- External work - exposed on wall

RELATED WORKS

OD250874/2025-2026:[OD from DAR 60.1.2] RING BUND Type II Putting up ring bund with earth filled gunny bags of top width 1.0m bottom width 2.0m height 2.0 m side and filling in between with earth to form ring bund and maintaining the same leak proof till the completion of the work and clearing the site by dismantling the bund after completion of the work. etc. complete

OD250887/2025-2026:[OD from DAR 60.2.2] Bailing out water Using 5HP Pump- Bailing out water with 5HP engine and pump set including conveyance to site and erection, cost of fuel, lubrication oil and other stores, pay of staff etc. complete.

2.6.1:Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-in-charge.All kinds of soil

OD249879/2025-2026:DRY RUBBLE MASONRY _ Dry rubble without concrete levelling course masonry with good quality blasted rubble including packing to compactness to lines and levels cost and conveyance of all materials labour charges etc. complete as per direction of Departmental officers at site

4.3.2:Centering and shuttering including strutting, propping etc. and removal of form work for:Retaining walls, return walls, (any thickness) including attached pilasters, buttresses, plinth and string courses fillets, kerbs and steps etc.

4.1.3:Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:2:4 (cement : 2 coarse sand (zone-III)derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources)

13.33.1:Pointing on stone work with cement mortar 1:3 ( 1 cement : 3 fine sand):Flush/ Ruled pointing

7.1.1:Random rubble masonry with hard stone in foundation and plinth including levelling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) up to plinth level with:Cement mortar 1:6 (1 cement : 6 coarse sand)

50.2.25.1:Filling with contractor's own earth ( excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20 cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift up to 1.5 m as per direction of site Engineer-in-charge

4.1.8:Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:4:8 (1 Cement : 4 coarse sand (zone-III) derived from natural sources : 8 graded stone aggregate 40 mm nominal size derived from natural sources)

4.3.1:Centering and shuttering including strutting, propping etc. and removal of form work for:Foundations, footings, bases for columns

10.1:Structural steel work in single section, fixed with or without connecting plate, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete.

OD250216/2025-2026:Providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by Engineer-in-charge) 0.35 mm (+0.05%), total coated thickness with zinc coating 120 grams per sqm as per IS: 277, in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns. Sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length up to 12 meter or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling/self tapping screws with EPDM seal, complete up to any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required.

13.48.3:Finishing with Deluxe Multi surface paint system for interiors and exteriors using primer as per manufacturers specifications:Painting Steel work with Deluxe Multi Surface Paint to give an even shade. Two or more coat applied @ 0.90 ltr/10 sqm over an under coat of primer applied @ 0.80 ltr/10 sqm of approved brand and manufacture

13.111.2:Finishing walls with Acrylic Smooth exterior paint of required shade :Old work (One or more coat applied @ 0.90 ltr/10 sqm).

13.48.2:Finishing with Deluxe Multi surface paint system for interiors and exteriors using primer as per manufacturers specifications:Painting wood work with Deluxe Multi Surface Paint of required shade. Two or more coat applied @ 0.90 ltr/10 sqm over an under coat of primer applied @ 0.75 ltr/10 sqm of approved brand and manufacture

OD253252/2025-2026:Providing and fixing Inaguration / Name Board, with Granite of any colour and shade for Name board, of required size laid over base of cement mortar 1:4 (1 cement : 4 coarse sand), including all charges etc. complete at all levels, including lettering and fixing.