REPAIR / MAINTENANCE OF CENTRAL SEWAGE TREATMENT PLANT, MOTOR CONTROL PANEL, AIR COMPRESSURE AND MBBR CHAMBER ALONG WITH CERTAIN OTHER CONNECTED WORKS AT FILTERATION PLANT AF-I UNDER GE (AF) JAMNAGAR NO.2

Amount

M & L for disconnecting electrical connection & outlet pipe connection, taking out non clogging submersible pump set complete with motor of capacity upto 15 HP from the sewage collection sump lowered at the depth of 6 to 10m from the ground level complete with HDPE pipe and submersible cable, transported to authorized workshop for repair/servicing, transported back to existing location and lowering the same along with HDPE pipe and electric cable including fixing of cable to pipe with PVC strip, replacement of rusted clamps, mild steel bolts, nut and washers with stainless still nut and bolt, dismantling of old rusted lifting chain and fixing new chain, complete all as specified and directed. Note : (i) Repairing of pump & motor will be measured & paid separately. (ii) New Chain will be measured & paid separately. (iii) Cable & HDPE pipe if found unserviceable shall be measured & paid separately .

M&L for repairing / serviceing of self priming non clogging pump set of capacity 100cum/hr by opening / dismantling the pump complete overhauling taking out defective / unsv / worn out parts and replacing the following spare parts and reassembling the pump set after repair including replacing the rusted bolts, nuts washers etc and testing complete all as specified and directed.

Motor end cover

Bearings as per existing (set of two) with bearing sleeve

Air / Pile Plug, joint ring, Made of SS 316

Fasteners in Liquid, Made of BHT Steel

Double Mechanical seal, Made of C vs P S Ceramic

Cable entry kit, Made of Neoprene rubber

O Ring for upper and lower bearing

Stuffing box bush

Casing ring

Impeller with key for impeller

Oil for mechanical seal

Wear plate as per existing MOC

Alignment of pump impeller with motor shaft

Repairing of shaft by remetaling / welding, grinding and polishing

M&L for repairing / servicing of electric motor cap upto 15HP couplled to non clog submersible pump, AC 3 phase, by dismantling the motor and coupling pulley and sent to workshop for repair. Removal of existing burnt out copper winding wire, cleaning of slots using suitable reagents and rewinding with super enamelled copper winding wire of appropriate gauge to achieve required RPM, varnsihing, drying, ovening, overhauling, greasing, painting and assembling the same after complete repair, connecting with pump and making necessary electrical connection and testing of motor after installation complete all as specified and directed. Note: Contractor shall be responsible for maintaining required RPM after repair, non compliance of speed considered as incomplete repair.

M&L for dismantling of air compressor / blower Model UGRK 240 Make: USHA and seperating the assembly of compressor pump and electric motor from horizontal air tank carefully by opening rubber belt, flywheel, nuts, bolts, foundation bolts, opening discharge hose pipe nuts & bolts, loading / unloading the pump set from central STP & transport to nearest workshop for repair and transported back after repair, reconnecting accessories and other fittings/fixtures complete all as specified and directed.

M &L for opening the cylinder machine slant fins of air compressor complete, cleaning by scrubbing & supplying intermediate stage bodies complete and carry out repair/replacement of following parts / spares of oil compressor as under:-

Connecting rod

Ball bearing with bearing cap assembly

O ring

Air filter kit with filter element

Gear wheel

Pump oil, multigrade oil SAE 20W90

Oil level slight glass

Air regulator (range 2-125psi)

Oil dipstick breather assembly

Cylinder head gasket kit complete

Oil seal

Injection rings

Flywheel W/Set screw

Flywheel V belt

Upper and lower rotor set

Belt guard assembly

Single groove fixed bore pulley

M&L for repairing / servicing of electric motor cap 50HP couplled to air compressor, AC 3 phase, by dismantling the motor and coupling pulley and sent to work shop for repair. Removal of existing burnt out copper winding wire, cleaning of slots using suitable reagents and rewinding with super enamelled copper winding wire of appropriate gauge to achieve required RPM, varnsihing, drying, ovening, overhauling, greasing, painting and assembling the same after complete repair, connecting with pump and making necessary electrical connection and testing of motor after installation complete all as specified and directed. Note: Contractor shall be responsible for maintaining required RPM after repair, non compliance of speed considered as incomplete repair.

M&L for repairing / servicing of electric motor cap 25HP couplled to submersible pump, AC 3 phase, by dismantling the motor and coupling pulley and sent to workshop for repair. Removal of existing burnt out copper winding wire, cleaning of slots using suitable reagents and rewinding with super enamelled copper winding wire of appropriate gauge to achieve required RPM, varnsihing, drying, ovening, overhauling, greasing, painting and assembling the same after complete repair, connecting with pump and making necessary electrical connection and testing of motor after installation complete all as specified and directed. Note: Contractor shall be responsible for maintaining required RPM after repair, non compliance of speed considered as incomplete repair.

M&L for repairing / servicing of self priming submersible pump set of capacity 25HP by opening / dismantling the pump complete over hauling taking out defective/unsv/worn out parts and replacing the following spare parts and reassembling the pump set after repair including replacing the rusted bolts, nuts washers etc and testing complete all as specified and directed.

Wear plate

Motor end cover

Bearings as per existing (set of two) with bearing sleeve

Air / pile plug, joint ring, Made of SS 316

Fasteners in liquid, Made of BHT Steel

Double mechanical seal, Made of C vs P S Ceramic

Cable entry kit, Made of Neoprene rubber

O Ring for upper and lower bearing

Impeller with key for impeller

Oil for mechanical seal

Alignment of pump impeller with motor shaft

M & L for cleaning of RCC MBBR rector tank of size 5.65 meter dia, 5.00 metre depth & 0.80 free board of sewage treatment plant, by bailing out complete sewage and all the accumulated sediments, sludge and foreign particles etc, scrubbing, brushing and removing all the dirt / sludge accumulated on the walls / floor etc and depositing outside defence land, after complete removal of accumulted material finally cleaning the tank with fresh water complete all as specified and directed.

Description all as per Item No 09 above but clari tube settler tank of size 10 metre dia, 2.70 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but sludge holding tank of size 3 x 3 metre, 1.80 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but sludge thickener tank of size 4 metre dia, 3.50 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but sludge drying beds of size 9 x 9 metre, 1.50 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but chlorine contact tank of size 6.0 metre dia, 2.00 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but filter feed tank of size 5.50 metre dia, 1.80 metre depth & 0.30 metre free board complete all as specified and directed.

Description all as per Item No 09 above but stilling chamber complete all as specified and directed.

Description all as per Item No 09 above but grit chamber complete all as specified and directed.

Note for item No 09 to 17: Work shall be got executed by experienced person and all the safety precautions as per CPCB norms will be ensured during cleaning of well by the contractor. Contractor may visit STP plant to understand the location, shape and size cleaning chambers.

Cleaning of RCC under ground treated sewage water well of 7.50 metre dia, 5 metre depth & 0.2 metre free board, by bailing out complete water removing all the accumulated sediments, sludge and foreign particles etc and depositing at a distance not less than 50 m from the site including scrubbing, brushing and removing all the dirt / mud accumulated on the walls / floor etc including writing the date of cleaning with white synthetic enamel paint on black background with synthetic enamel paint complete all as specified and directed.

Supply and fix in repair moving bed bio reactor media of polypropiline of cylinderical shape having 6 Nos of holes of size 20 x 25mm with specific gravity of 0.9gmcm3 as per recommendation of Manufacturer complete all as specified and directed.

M&L for servicing of gear box (Make :- Kavitsu, Type :- Planetary type, Model :- KA -02, Reduction Ratio :- 3.3) of Sludge Thickener tank, by taking out from existing position, opening the body, cleaning the internal surface replacement of oil seal, replacement of nut bolt washer etc, refixing in same position complete all as specified and directed.

M & L for servicing of decanter centrifuge with maxm solid density: 3.0kg/dm3, Bowl speed:5300 rpm and Feed temp:60̊ deg centigrade and comprising of horizontal cylindrical bowl equipped with a screw conveyor, gear box, feed inlet, discharge ports and feed tube Make: Alfa Laval type: ALDEC 10. The servicing shall be carried out by dismantling of bowl, screw conveyer, gear box and feed tube, cleaning of ports and greasing and oiling of other mechanical parts for smooth functioning and reassembling the entire machine complete all as specified and directed.

M & L for servicing / maintenance of dual media filter / pressured filter / multigrade filter of any filtration capacity (cum/hr) and any specific dimension of vessel made from carbon steel IS 2062 grade steel plate installated at various locations, by dismantling and disconnecting inlet and outlet water connection, testing and checking of face piping, fittings, valves, filter media, under bed plate fitted with strainer, pre/post filter pressure gauges, cocks, manhole, hand hole, air vent system cleaning of existing sand gravel/media for removal of algae on walls and media using pressurized water arrangement to obtain discharge rate as per existing or higher rate after cleaning/servicing and testing of entire collection system (Header / Lateral) and frontal piping system for leakage after reassembling complete all as specified and directed. Note:(i) All parts such as valves/gauges/pipe and other connected accessories if found unsv shall be replaced under respective items. (ii) Replacement of filter media such as sand, gravel and antracite as per existing size shall be replaced / replenish depending on the quality and quantity of media with the prior approval of Engr-in-charge under respective item. (iii) All necessary arrangement required at site for testing/checking shall be arranged by the contractor on his own expenses.

Supply and fix in repair mesh box with vertically or horizontally mounted rectangular mesh sieves or cylindrical bar sieves for rising pipe of moving bed bio reactor No.1 & 2 complete all as specified and directed.

Supply and fix in repair drain mesh for MBBR 1 & 2 complete all as specified and directed.

M&L for repairing / servicing of sludge transfer pump set of capacity 1.3 cum/hr by opening / dismantling the pump complete over hauling taking out defective/unsv/worn out parts and replacing the following spare parts and reassembling the pump set after repair including replacing the rusted bolts, nuts washers etc and testing complete all as specified and directed.

Motor end cover

Bearings spacer with bearing cover

Drain plug

Set of bearing (Small and large)

Gland with gland ring

Grease seal set (small and large) with housing

Shaft with shaft key

Mechanical seal

Auger cum coupling rod

Gland packing set

‘O’ ring set

Water thrower

Coupling rod pin and coupling rod bush

Hexagonal nuts and bolts

M&L for repairing / servicing of sludge thickner feed pump set of capacity 3.0 cum/hr by opening / dismantling the pump complete over hauling taking out defective/unsv/worn out parts and replacing the following spare parts and reassembling the pump set after repair including replacing the rusted bolts, nuts washers etc and testing complete all as specified and directed.

Pump casing ring

Bearings DE & NDE as per existing(set of two) with bearing sleeve

Stuffing box bush

Fasteners as per existing

Wear ring as per existing MOC

Casing ring with casing cover

Impeller key and coupling key

Inspection hole cover

Thrust ball bearing with adapter

Impeller shaft sleeve

Coupling set complete

Companion flange

Alignment of pump impeller with motor shaft

Repairing of shaft by remetaling / weiding, grinding and polishing

Suction bell mouth

Gland packing as per existing

M&L for repairing / servicing of electric motor cap 1.1KW couplled to sludge transfer pump, by dismantling the motor and coupling pulley and sent to workshop for repair. Removal of existing burnt out copper winding wire, cleaning of slots using suitable reagents and rewinding with super enamelled copper winding wire of appropriate gauge to achieve required RPM, varnsihing, drying, ovening, overhauling, greasing, painting and assembling the same after complete repair, connecting with pump and making necessary electrical connection and testing of motor after installation complete all as specified and directed. Note: Contractor shall be responsible for maintaining required RPM after repair, non compliance of speed considered as incomplete repair.

M&L for repairing / servicing of electric motor cap 0.75KW couplled to sludge thickner feed pump, by dismantling the motor and coupling pulley and sent to workshop for repair. Removal of existing burnt out copper winding wire , cleaning of slots using suitable reagents and rewinding with super enamelled copper winding wire of appropriate gauge to achieve required RPM, varnsihing, drying, ovening, overhauling, greasing, painting and assembling the same after complete repair, connecting with pump and making necessary electrical connection and testing of motor after installation complete all as specified and directed. Note: Contractor shall be responsible for maintaining required RPM after repair, non compliance of speed considered as incomplete repair.

M&L for periodical Servicing & maintenance of chemical dosing plant by providing specialist tradesmen including replacement of valve, rubber washer, check nut, connecting nuts, adapter and cleaning and servicing of solution tank and connected items to ensure that perfect serviceability of the plant and obtain required dosage to the entire satisfaction of the Engr-in-charge. Note: (i) Minor item such as gasket, wires, lugs or any other item require for Periodical Servicing & maintenance shall be deemed to be included in the cost of this item.(ii) Major spare part if found unserviceable shall be measured & paid separately as supply only.

Supply only dosing pump/injector, high/max pressure of 4 kg/cm2 and Max flow rate 6 liters/hr, single head gear motor adjustable dosing pump with accessories complete including lead tubing, connecting nuts, injection check valve, clay weight and ferrules, suitable for altoch dosing plant complete all as specified and directed.

Supply only white suction / discharge tube of size 3/4" or 3/8" dia suitable for chemical dosing plant complete all as specified and directed.

Taking out old/unsv LT cable any size from trenches / duct, checking by megger and carry out repair / replacement of defective cable complete all as specified and directed.

Supply and laying or fixing or passing through pipe testing and commissioning of 1100 volts grade 'heavy duty' PVC sheathed armoured cable LT, XLPE insulated aluminium conductor multi stranded served with inner sheating of PVC tape armoured with galvanised steel wire or tape and overall PVC sheathed of size 95 sqmm nominal cross sectional area 3.5 core confirming to IS specification complete all as specified and directed.

Description all as per ser item No.33 above but of size 120sqmm 3.5core

Excavation in trenches not exceeding 1.5 m wide but not exceeding 1.5 m in depth for foundation etc or for shafts and getting out in soft/losse soil including trimming sides and bottom of trenches complete all as specified and directed.

Returning, filling-in, including spreading, watering and well ramming in layers not exceeding 25 cm thick each, in soft / loose soil complete all as specified and directed.

Removing excavated surplus soil to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

M&L for sand cushioning to underground LT cables 8cm before laying the cable and 15cm after laying the cable and gently punning down complete all as specified and directed. Note : Punned thickness will be measured for payment.

Supplying and laying reinforced precast concrete cable cover, class EHV, type 1 with peak, but type 2, flat, size 300mm x 180mm x 40mm complete all as specified and directed.

Taking down old unreinforced precast concrete cable cover any type from the trenches etc complete all as specified and directed.

Supply and fix in repair cast iron butterfly valve, 150mm with both end flanged type, conforming to IS 13095 with nuts bolts and washers of suitable size and necessary rubber gaskets etc for following sizes complete incl taking out old unsv complete all as specified and directed.

Supply and fix in repair high pressure, heavy duty cast iron non return valve / check valve of 150mm, conforming to BS 1868, Class 600, suitable to hydrostatic test pressure for body 156 kg/sq cm & for seat 115 kg/sq cm, both ends flanged in existing line, after removal of old unserviceable non return valve without damaging to existing pipe line complete all as specified and directed. Note : Suitable size MS flanges for existing pipe line, Joints and jointing materials shall be included under this item.

Deployment of man power for collecting the sample of water, from different point such as under ground sump of treated water supply and sewage treatment plant for bacteriological testing of water including arsenic test from reputed Govt laboratory submitting the test report to Engr-in-Charge complete all as specified and directed.

Material and labour poly aluminium chloride as coagulant / flocculent for transforming raw water in to clean and safe water for treated waste water, inorganic soluble polymer powder in factory sealed 25 Kg HDPE bags wit two LDPE liners complete all as specified and directed. Make:Grasim Industries limlited "Vikram pac" AC/100S grade or equivalent make with ISI and NSF certification both. Note: (i) Contractor must submit test report with hologram for the lot / batch supplied to the Engr-in-charge. (ii) Each drum must be affix with Hologram.

Material and labour sodium hypo chlorite solution grade -I low strength chlorination chemical (10% - 12%) for treated water disinfectant in factory sealed air tight HDPE container 25 lit / 45 lit conforming to IS 11673:11992 Make :- M/S Sree Rayalaseema Hi-strength Hypo Ltd. or equivalent make with ISI and NSF certification both complete all as specified and directed. Note : Each package should contain following information (a) Name and grade of material (b)Gross and net mass (c) Date of packing (d) Lot number (e) Indication of source of manufacturer.

Supply and lay M S pipes heavy grade with all fittings laid in floors or fixed to walls and ceilings etc of sizes including testing and taking down old unsv complete all as specified and directed for the following sizes:-

200 mm bore

100mm bore

150mm bore

80mm bore

50mm bore

Earthing complete with galvanised steel earth electrode plate of size 600x600x6mm thick, buried directly in ground(earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.50m below normal ground level, connected to galvanised iron earth strip 32x6mm up to test point with suitable GI nuts/bolts and brazed properly up to main board including earth pit in cement concrete 1:2:4 type B-1, precast RCC cover in 1:2:4 reinforced with expanded metal, with suitable handle, excavation and earth work in any type of soil and including medium grade GI watering pipe 25mm bore with funnel wire mesh and medium grade GI earth wire protection pipe 50mm bore up to main board complete as shown in electrical plate no 3 of MES schedule Part-I 1991, connected to earthing testing point including taking out existing unsv earthing complete all as specified and testing on completion complete all as specified and directed.

Earthing complete with galvanised steel earth electrode plate of size 600x600x6mm thick, buried directly in ground(earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.50m below normal ground level, connected to galvanised iron earth wire 4.0 mm up to test point with suitable GI nuts/bolts and brazed properly up to main board including earth pit in cement concrete 1:2:4 type B-1, precast RCC cover in 1:2:4 reinforced with expanded metal, with suitable handle, excavation and earth work in any type of soil and including medium grade GI watering pipe 25mm bore with funnel wire mesh and medium grade GI earth wire protection pipe 50mm bore up to main board complete as shown in electrical plate no 3 of MES schedule Part-I 1991, connected to earthing testing point including taking out existing unsv earthing complete all as specified and testing on completion complete all as specified and directed.

Supply and fix chemical for MBBR media to produce bateria for oxidation of organic cpompound complete all as specified and directed.

Material and labour cleaning of STP area PS-1,PS-2,PS-3,PS-4,main STP and all treated water pump house averaging 15 cm depth (not exceeding 30 cm) incl removing shrubs, mini plants,grass and other unwanted material and levelling complete in soft and loose soil complete all as specified and directed.

Supply and Fix display colured layout diagram of STP instllation showing Sump, motors, pipe lines of all types with proper sizes, legends and direction of flow on acrylic sheet. The design, orientation of letters and size of display board shall be decided by Engr-in-charge.

S&F in repair fully automatic star delta starters in sheet steel enclosure AC-3 duty,415 V, suitable for 50 HP motor and relay settings 40-95 A complete all as specified and directed.

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