SPECIAL REPAIR FOR REPLACEMENT OF WATER TREATMENT PLANT OF CAPACITY 90000 LPH AGAINST BER AT MAIN PUMP HOUSE AT COMD HOSP (EC) UNDER GE(A) KOLKATA

Amount

NOTES:- The bidders / contractors are advised to read tender document & all corrigendum / amendments and General conditions of contracts before entry / quoting the rates.

Dismantling of existing IRP PLANT including all components i.e oxidation filter, iron removal filter, softening filter 1 and softening filter 2 of cap 90000 LPH carefully by removing it from its original location including existing all frontal line complete and handover the old UNSV plant and will be deposited to E/M store for further disposal under departmental arrangements complete all as specified and as directed.

Design, supply, installation/ construction, commissioning & testing of Water treatment plant of capacity 90000 Litre per hour to bring down the bore well raw water with parameters as given in here-in-after, suitably treated to continuously supply potable drinking water as per IS 10500 with all civil engineering works for water treatment plants and including following components and interconnections between different components of WTP so as to provide a functional water treatment plant complete all as specified and as directed. (A) OXIDATION CHAMBER:- (i) Oxidation chamber of 90000 Litre per hour, closed type with catalytic media, under bed plate fitted with strainers, working pressure : 3 to 5 kg/cm² along with suitable capacity of electric driven air compressor with necessary connections with required size of compressed air line and control valves for compressed air . having suitable size as deigned by OEM of suitable height Vertical type one set of 150 mm dia nominal bore frontal mild steel pipe work for inlet, outlet, back wash and rinse line and 5 No butter fly valve having hand lever type complete all as specified and directed. Cont.../-

Cont.. (ii) Capacity : 90000 LPH (iii) The pressure vessel and dished ends and bed plate shall be made of medium Grade MS Sheet shall not less than 10 mm. (iv) (iv) MNO2 compound of suitable quantity as per design. (v) Material of construction & Construction Code IS :2062 & IS :2825 (Unfired Pressure Vessel) (vi) The backwash frequency shall be every 12 hours (twice a day) for continuous operating unit. If unit is operated intermittently, the total operating time in service cycles shall be limited to 5-6 hours before next back wash & back wash time 15-20 minutes. Note:- Oxidation Chamber should be as per OEM design but with specification not lesser than minimum dia 2000 mm and HOS-1875 mm. (B) MULTIGRADE FILTER : Multigrade filter having capacity 90000 LPH consisting vertical cylindrical mild steel pressure vessel with dished end, having size of suitable capacity Vertical type one set of 150 mm dia nominal bore frontal mild steel pipe work for inlet, outlet, back wash and rinse line and 5 No butter fly valve having hand lever type . Working pressure : 3.5 kg/cm² with arm collector or nozzle plate including inlet, outlet wash out, back wash, water drain pipe connection with butter fly type control valves as required, sand dump port, pressure gauge dial type, support filter media:– 01 No.complete all as specified and as directed. (i) Capacity : 90000 LPH (ii) The pressure vessel and dished ends shall be made of medium Grade MS Sheet shall not less than 10 mm. (iii)The filter plant shall ensure even distribution across the surface area of the filter bed, header, lateral system & bottom collecting system. (iv) The plant shall have Air release arrangement with 2 No pressure gauge to monitor head loss across the filter and sampling cocks on inlet and outlet ends. The filter plant shall have full charge of filter media as per manufacturer’s design (v) The backwash frequency shall be every 12 hours (twice a day) for continuous operating unit. If unit is operated intermittently, the total operating time in service cycles shall be limited to 5-6 hours before next back wash & back wash time 15-20 minutes. Note:-Multigrade Filter should be as per OEM design but with specification not lesser than minimum dia 2000 mm and HOS-1875 mm. (C) ACTIVATED CARBON FILTER : Activated Carbon filter having capacity 90000 LPH consisting vertical cylindrical mild steel pressure vessel with dished of suitable sizeand height Vertical type one set of 150 mm dia nominal bore frontal mild steel pipe work for inlet, outlet, back wash and rinse line and 5 No butter fly valve having hand lever type . pressure Gauge : 2 nos for raw water and filter water, Under bed strainer nozzle double nut type, Guard media (gravels) and Activated carbon to be provided as per designed and suggested by OEM, complete all as specified and as directed. (i) Capacity : 90000 LPH (ii) The pressure vessel and dished ends shall be made of medium Grade MS Sheet shall not less than 10 mm. Cont.../-

Cont.. (iii) The filter plant shall ensure even distribution across the surface area of the filter bed, header, lateral system & bottom collecting system.(v) The plant shall have Air release arrangement with 2 No pressure gauge to monitor head loss across the filter and sampling cocks on inlet and outlet ends. The filter plant shall have full charge of filter media as per manufacturer’s design. (iv) The backwash frequency shall be every 12 hours (twice a day) for continuous operating unit. If unit is operated intermittently, the total operating time in service cycles shall be limited to 5-6 hours before next back wash & back wash time 15-20 minutes. Note:- Actived Carbon Filter should be as per OEM design but with specification not lesser than minimum dia 2200 mm and HOS-1875 mm. (D) SOFTENER FILTER : Softener filter having capacity 90000 LPH consisting vertical cylindrical mild steel pressure vessel with dished end of suitable size and height Vertical type one set of 150 mm dia nominal bore frontal mild steel pipe work for inlet, outlet, back wash and rinse line and 5 No butter fly valve having hand lever type complete all as specified and as directed.Regenaration Tank of suitable capacity of HDPE material. NOTE: Water Softening Plant as designed by the OEM, materials Code : IS 2062 (maximum working pressure 3.5kg/cm2) and complete with the following accessories :- (i) Frontal Pipe line of 150mm dia (Medicum Grade) - 01 set (ii) Cast Iron Butterfly valve of 150 mm dia - 05 Nos (iii) Guard Media (gravels) - as per OEM's design. (iv) Under Bed plate system fitted with PVC strainer double nut type as per OEM's design. (v) PVC Injector for Brine solurion - As per OEM design. (vi) Pressure guages - 02 No, air vent systems, back washing facilities (vii) HDPE Tank for Brine Solution - 1000 Ltrs - 01 No (viii) Capacity : 90000 LPH (ix) The pressure vessel and dished ends shall be made of medium Grade MS Sheet shall not less than 10 mm. (x) The output regeneration shall be every 12 hours (once a day) for continuous operating unit. Note:- Softner Filter should be as per OEM design but with specification not lesser than minimum dia 1800mm and HOS-1875mm and resin quantity should be 3800 Ltr, OBR-12 hrs and Resin - 225 NA. (E) AIR COMPRESSOR :- Reciprocating type Air Compressor of air discharge capacity 662 Ltr/min @ 11.0 Kg/cm², Single stage double cylinder type of capacity 5.0 HP,speed 700 rpm and having storage tank of capacity 275 Ltr including belt, belt guard, Motor Starter, Air receiver, Pressure Switch, Pipe Lines etc. all as per OEM's design. Cont.../-

Cont.. (F) CHLORINE DOSING SYSTEM:- (i) Chlorine dosing pump : Cap 10 lph/06 kg per with 100 ltr capacity including necessary cable connection of suitable size: 02 Nos (1W + 1S) (ii) FRP solution preparation cum settling tank. (G) SALT CHAMBER:- Salt chamber (with lead) of dimension (minimum)1600 mm dia x 1250 mm height for preparation of brine solution, made of 6.0 mm thick MS sheet duly anti corrosive Rubber / FRP coating. (H) PIPE LINE & VALVES:- (i) Frontal Pipe line to be made with medium grade ERW M.S. Pipe of 150 / 100 mm bore ( As per OEM's design) including all M.S. pipe fittings / flanges / Nuts, Bolts, Washers / Gaskets etc. and necessary welding, drilling , threading complete as required at site. (ii) Inlet connection from existing raw water pipe line to filter and outlet connection from filter to the delivery pipeline to UG Sump (9.0 RM approx), to be made with medium grade ERW M.S. Pipe / Medium Grade GI Pipe as required at ground. (iii) Cast Iron Wafer type & lever operated Butter Fly valve of bore 150mm/100mm - As per OEM's design. Note:- MS Pipe should be of medium duty and conforming to IS-1239 (I) MISCELLANEOUS ITEMS:- (i) LDPE Strainer - Qty 250 Nos (approx) or as per OEM's design (ii) Pressure Guage & Sampling Cock for raw & filtered water.- 01 Set each (iii) Air Vent System : 20 mm bore GI pipe with Gun Metal Gate Valve (J) RAW WATER WITH PARAMETERS (i) Iron Content of Raw Water as Fe : 1.37 ppm (ii) pH value of Raw Water : 7.8 (iii) Turbidity Content of Raw Water : 1.7 ppm (iv) Hardness : 780 mg/l (v) Design Code : As per CPHEEO (vi) Design Pressure / Test Pressure / Working Pressure shall be as per IS:2825 Cont.../-

Cont.. Note :- (i) The design of the plant and construction drawings shall be vetted from any IIT/Govt Engineering Colleges/ university where Environmental Engineering discipline exists at PG level and accordingly same be submitted to GE before placing the order for approval AO and GE will submit the same to HQ CWE duly recommended for approval of AO. The cost of drawing & vetting charge shall be deemed to be inclusive in quoted rate. (ii) The thickness of the plate for shell body, dish end and bed plate shall have to be designed as described in IS - 2825 for determining the thickness based on the flow rate of fluid as mentioned in the above IS. In any case the flow rate shall not be considered beyond the specified range as mentioned in the IS- 2825. (iii) Necessary foundation for installation of plant shall be provided as per manufacturer's recommendation. Cost of PCC foundation, foot stool foundation including drain pipe and sub-assemblies pipes , painting and misc fitting like TEE, Bends, valve, electrical connections etc are deemed to include in quoted rate. (iv)Taking down old WTP components and including disconnecting accessories and shifted to MES store yard of GE and cost of the same shall be deemed to be inclusive in quoted rate. (v) The plants shall be got commissioned from manufacture and a certificate to this effect shall be produced from manufacture after installation. (vi) Display board for water flow, SOP, routine maintenance to be submitted after installation. (vii) The exsiting & new schematic layout/process flow diagram are attached here-in-after for guidance. The proposed work WTP works shall be executed in the active water treatment plant, in case any addation /alteration are required related WPT for functional of WTP, same shall be provide as per manufacturers' recommendation and cost of the same shall deemed to be included in the quoted rate. Accordingly bidder/tenderer is advised to visit site before quoting his offer and nothing will be paid on this account. (viii) The cost of all types of activated Filter Media shall deemed to be included in the unit rate quoted. (ix) Installation and commissioning work shall be carried out in presence of Engineer of OEM. (x) Painting :- Internal surface shall be painted with lead free Epoxy paint and outside surface with Synthetic Enamel paint over two coats of red oxide primer as per OEM recommendation (xi) Colour coding of pipe lines, arrow marking and numbering of valves shall be done as per latest IS Code. (xii) All internal steel surface of cylindrical vessel shall be painted with food grade, non toxic(lead free) epoxy paint outside surface with Synthetic Enamel paint over two coats of red oxide primer as per OEM recommendation. (xiii) The treated water should be tested by the contractor from National Test House /IIT or any Govt Engineering college/ Govt University and cost of the same shall be deemed to be inclusive in quoted rate.

Material & labour for GI water tubing medium grade including all fittings fixed complete laid in wall/ceiling/floor of 80 mm dia all as specified and directed by Engr-in-charge.

Material & labour for GI water tubing medium grade including all fittings fixed complte laid in wall/ceiling/floor of 100 mm dia all as specified and directed by Engr-in-charge.

Material & labour for 80 mm dia butter fly valve made of iron including all accessories complete all as specified and directed.

Material & labour for 100 mm dia butter fly valve made of iron including all accessories complete all as specified and directed.

Material & labour for 80 mm dia bronze vertical check valve incl all accessories complete all as specified and directed.

Excavation in trenches not exceeding 1.50m wide and not exc 1.50m in depth for foundations or for shafts, wells, cesspits, manholes, pier holes etc. not exc 10Sqm on plan and not exc 1.50m in depth and getting out in soft/loose soil complete all as specified and as directed.

Returning, filling in, inlcuding spreading, leveling, watering and well ramming in layers not execeeding 25 cm as in soft/loose soil complete all as specified and directed.

Removing excavated material (soil) not exc 50m and depositing where directed at a level n. exc. 1.50m above the starting point complete all as specified and as directed.

Note: Schedule of credit (SCHEDULE OF CREDIT) amount of Rs 1,570.00 mentioned on Page No 27 shall be deducted from the total quoted amount of BOQ.

M P KHAITAN (BID ID -3357968)

surendra infrastructure pvt ltd (BID ID -3355756)

NIRMAL SALES CORPORATION (BID ID -3358015)

Kakolil Trade Agencies (BID ID -3356101)