PROVISION OF BOREWELLS AND ALLIED WORKS FOR OTM ACCN, WORKSHOPS AND FIRE FIGHTING AT CTW UNDER GE (U-II) VISAKHAPATNAM

Boring/drilling bore well of required dia for inserting casing/ strainer pipe of 200 mm dia, by Down the Hole Hammer (DTH) Drilling or suitable method prescribed in IS: 2800 (Part-I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, upto 30 m depth below ground level in any type of soil strata including hard stone / boulders complete all as specified and directed by Engineer-in-Charge.

All as per item No. 1.00 here-in-before but depth exceeding 30 m but not exceeding 60 m below ground level

All as per item No. 1.00 here-in-before but depth exceeding 60 m but not exceeding 90 m below ground level

All as per item No. 1.00 here-in-before but depth exceeding 90 m but not exceeding 120 m below ground level

All as per item No. 1.00 here-in-before but depth exceeding 120 m but not exceeding 150 m below ground level

Development of borewell by reaming from 200mm dia to 350mm dia upto required depth from ground level including gravel packing in tube well construction in accordance with IS: 4097 including providing gravel fine/medium/coarse, in required grading & sizes as per actual site requirement complete all as specified and and directed by Engineer-in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, 200 mm nominal size dia, unplasticized plain PVC medium well casing (CM) pipe, conforming to IS: 12818, including required hire and labour charges, fittings & accessories etc. all complete, for all depths, complete all as specified and and directed by Engineer-in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, 200 mm nominal size dia unplasticized PVC medium well screen (RMS) pipes with ribs, conforming to IS: 12818, including hire & labour charges, fittings & accessories etc. all complete, for all depths, complete all as specified and and directed by Engineer-in-charge.

Development of tube well in accordance with IS : 2800 (Part-I) and IS:11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by “V” notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in Govt / NABL accredited laboratory, including disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., complete all as specified and and directed by Engineer-in-charge.

Supplying and fixing M.S. clamp of 200 mm dia to the top of casing/housing pipe of tubewell as per IS: 2800 (part I), including necessary bolts & nuts of required size, complete all as specified and directed by Engineer-in-Charge.

Supply and fixing Bail plug/ Bottom plug of 200 mm dia to the bottom of pipe assembly of tubewell as per IS:2800 (part I) complete all as specified and directed by Engineer-in-Charge.

Supplying and fixing heavy duty cast iron borewell cap suitable for 200 mm dia casing removable type including fixing accessories, complete all as specified and directed by Engineer-in-Charge.

Supply and connect 3 core flat PVC Insulated & PVC Sheathed Industrial copper conductor submersible cable of size 4 sqmm, 1100 volts grade confirming to IS:694, complete all as specified and directed by Engineer-in-Charge.

Supply, lowering in borewell, connecting and testing of HDPE pipe, PE 100 grade, SDR series, PN 10 (SDR 13.6) of size 75mm, complete all as specified and directed by Engineer-in-Charge.

Supplying, laying, jointing, testing and commissioning of 80 mm dia, medium grade galvanized iron (GI) pipes conforming to IS:1239 Part-I (2004), including all fittings such as bends, tees, reducers, sockets, unions, nipples, clamps and supports, with threaded joints using approved sealing material, complete with cutting, threading, alignment, fixing in position, laid in trenches / fixed to walls and ceilings or laid in floors complete all as specified and as directed by Engineer-in-Charge.

Supplying, laying, jointing, testing and commissioning of 50mm dia medium grade galvanized iron (GI) pipes conforming to IS:1239 Part-I (2004), including all fittings such as bends, tees, reducers, sockets, unions, nipples, clamps and supports, with threaded joints using approved sealing material, complete with cutting, threading, alignment, fixing in position, laid in trenches / fixed to walls and ceilings or laid in floors complete all as specified and as directed by Engineer-in-Charge.

Supply and fix Gun-metal, gate valves, with iron wheel head, screwed both ends for iron pipe of size 80mm nominal bore including taking out old existing gate valve complete all as specified and directed by Enginee-in-Charge.

Supply and fix Gun-metal, gate valves, with iron wheel head, screwed both ends for iron pipe of size 50mm nominal bore including taking out old existing gate valve complete all as specified and directed by Enginee-in-Charge.

Supply and fix Horizontal installation, Ball type Non Return Valve (NRV) of size 80 mm nominal bore, PN 1.6 with both ends flanged, CI body and cover, Synthetic Nitrile Rubber Coated Ball, Leaded Tin Bronze Seat and Carbon Steel fasteners, enamel/epoxy painted complete all as specified and directed by Engineer-in-Charge.

Material and labour for constructing valve chamber of internal dimensions 600 mm x 600 mm x 600 mm with 100 mm thick PCC (1:4:8 ) type D-2 for foundation, brick walls built in cement mortar (1:4 ), PCC 1:2:4 type B1 for coping , rendering in cement mortar 1:4, 10 mm thick internally and on exposed surfaces externally up to 15 cm above GL. Bottom PCC floor of the pit should be minimum 30 cms below the bottom surface of valve flange to provide sufficient working space. The valve and other fittings should be housed in center of the pit, the vertices of the pit should be in right angle and champhered .The top cover of the pit shall be made out of 3mm MS sheet with angle iron frame made out of MS angle 50mm x 50 mm x 6 mm with MS hinges two Nos, and locking arrangements duly painted with two coats of water resistant synthetic enameled paint over one coat of red oxide primer complete all as specified and directed by Engineer-in-Charge.

Supply, laying, connecting, testing & commissioning of Power Cables, Aluminium Stranded Conductor 16 sqmm, 4 core, XLPE Insulated, Cores laid up, PVC Inner sheathed, Armoured with galvanized wire or galvanized steel strip, overall PVC Sheathed, 1100V grade as per IS 7098(Part 1) 1988 complete laid in trenches / floors / fixed to poles / walls / drawn through pipes etc including provision of lugs, glands, nuts, bolts & washers etc for connecting in LT feeder pillar box / panel and testing on completion all as specified and directed. Note: Excavation, earth work and provision of cable covers / protection pipe etc shall be measured and paid separately under relevant items of BOQ.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m depth and getting out in any type of soil for laying of cables / pipes etc complete all as specified and directed.

Supply and spreading of clean dry river sand in trenches for cushioning of cable complete all as specified and directed. Note: Punned thickness shall be measured for the purpose of payment.

Returning, filling in trenches including spreading, levelling, watering and well ramming in layers not exceeding 25cm complete all as specified and directed.

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

Supply and laying of un-reinforced precast concrete cable cover, Class LV, Type I, flat, size 250mm x 150mm x 40mm for cable protection in trenches complete all as specified and directed.

Material and labour for earthing complete with galvanized iron earth plate electrode 600mm x 600mm x 6 mm thick buried directly in ground (earth pit not less than 2.25 meters deep below ground level) with top edge of the plate not less than 1.5 meters below normal ground level connecting to GI strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanized iron or steel and earth strip protected by 50mm dia GI pipe medium grade and connected to pole structure/ panel board/earthing test point all as shown in electrical plate No. 3 of SSR Part-I(2009) and testing on completion, complete all as specified and directed. Note :- The unit rate quoted shall also include for excavation, earth work in any type of soil, plain cement concrete 1:3:6 mix, Type C1 pit, 40mm thick RCC 1:2:4 mix type B1 cover reinforced with 8mm dia TMT bras @ 150mm C/C both ways, GI funnel with watering pipe, wire mesh, protection pipe, earth strip up to 7.50m long complete in addition to item No. 1(a) to (e) of preamble (Notes) under sub heading earthing, specified in SSR Part II

Design, engineering, manufacture, inspection, testing, supply, installation, erection, commissioning and performance proving of Reverse Osmosis (RO) Water Treatment Plant of capacity 200 LPH, complete in all respects, including all necessary accessories, interconnections, fittings, instruments, supports and commissioning requirements, comprising the following major components, complete all as specified and directed:- (1) Raw Water Storage Tank of capacity 5000 litres, HDPE construction, complete with inlet, outlet, drain, overflow arrangement, vent, tubular level gauge and associated piping; (2) Raw Water Feed Pump Set consisting of 2 Nos. horizontal centrifugal monoblock pumps (1 working + 1 standby) of suitable discharge and head, including suction/discharge valves, NRV, pressure gauges and complete piping; (3) Chlorine Dosing System with 50-litre HDPE solution tank, dosing pump, suction strainer and CPVC injection piping; (4) Multi Grade Filter unit comprising FRP pressure vessel with multiport valve, filter media, flowmeter, complete interconnecting CPVC pipelines and fittings; (5) Activated Carbon Filter comprising FRP vessel with multiport valve, coconut shell activated carbon media, under-bed material and CPVC piping;

(Item No. 29.00 Continued...) (6) SMBS Dosing System complete with 50-litre HDPE preparation tank, dosing pump and accessories; (7) Antiscalant Dosing System complete with 50-litre HDPE preparation tank, dosing pump, piping and fittings; (8) Skid Mounted RO Plant comprising epoxy-coated MS skid, FRP membrane housing with TFC polyamide membranes, 5-micron cartridge filter, high pressure pump, wet panel with pressure gauges, rotameters, conductivity meter, HP switch and all CPVC process connections; (9) Microprocessor-based controller/control panel with cables and required automation; (10) CIP Skid for membrane cleaning complete with 500-litre HDPE tank, SS recirculation pump, micron cartridge filter and flexible hoses; (11) Product/Treated Water Storage Tank of capacity 1000 litres, SS-304 construction complete with nozzles, vent, drain and level gauge; (12) Post Chlorine Dosing System complete with 50-litre HDPE tank, dosing pump (1 LPH @ 12 kg/cm²), suction strainer and injection piping; and (13) Supply of consumables and operational chemicals for one-year operation (based on 8 hours/day), including chlorine solution, SMBS, antiscalant, replacement cartridge filters, and CIP chemicals such as SLS, STPP+EDTA, citric acid and SBC, complete with all accessories, tools, commissioning support and performance guarantee, conforming to relevant specifications and as directed by the Engineer-in-Charge.

Note for item No. 29.00 :- (i) The quoted rate shall be inclusive of the cost of all associated civil works and site requirements, such as FRP tank foundation, treated water tank foundation, foundation of equipment, anchor bolts, pipe supports, supporting structures, platforms, construction of drain sump and drain channels including any special lining, final painting at site, and grouting of all equipment, complete as directed by the Engineer-in-Charge. (ii) The RO Plant shall be designed based on the raw borewell water characteristics obtained from the water test reports conducted under BOQ Item No. 9. The treated water produced by the plant shall strictly conform to the drinking water quality standards as per IS:10500 (2012), including all acceptable limits prescribed for potable water. To confirm the portability and compliance of the treated water, the contractor shall submit treated water test reports from a Government / NABL accredited laboratory, certifying that the water meets the requirements of IS:10500 (2012) for drinking purposes. (iii) The contractor shall, prior to placing any order for procurement, submit the complete design and drawings of the RO Plant including GA drawings, P&ID, equipment layout, foundation details and all associated equipment, instruments, accessories and interconnections, duly issued by the OEM, in duplicate for approval of the Garrison Engineer through the Engineer-in-Charge. The contractor shall also furnish all technical details, data sheets, catalogues and clarifications as required for scrutiny, evaluation and approval. Manufacture and supply of all materials and equipment shall be carried out strictly as per the approved drawings and specifications. However, such approval shall not relieve the contractor/supplier of his responsibility for ensuring correctness, completeness and compliance of the system in accordance with applicable standards, MES specifications and statutory regulations, and any discrepancy noticed during execution, testing or commissioning shall be rectified by the contractor at his own cost without any extra claim.

Supply, installation, jointing, testing, and commissioning of CPVC SDR11 pipes and fittings of size 50mm dia, manufactured from Chlorinated Polyvinyl Chloride (CPVC) in accordance with IS:15778 (pipes) and ASTM D 2846 (fittings). Fittings shall include all necessary elbows, tees, reducers, couplings, unions, adapters, end caps, and specials to complete the installation. Jointing shall be carried out using approved solvent cement and primer or threaded connections with PTFE tape, strictly in accordance with the manufacturer’s recommendations. The quoted rate shall include all accessories, supports, clamps, cutting, wastage, alignment, cleaning, testing, and making good, complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing CPVC ball valve of size 50mm complete with fixing accessories, complete all as specified and as directed by Engineer-in-Charge.

Note for item No. 32.00 :- The Contractor shall submit set of all drawings of the L.T. Panels / Pillar Boxes and its components in duplicate and get the same approved from GE before commencement of production. The contractor shall furnish all details and clarifications required if any for scrutiny and evaluation. Manufacture of material to be supplied shall be done strictly as per approved drawing. However, approval of drawing shall not absolve the contractor/supplier of his liability for ensuring correctness according to applicable standards & regulations.