PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

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Air release valve for common delivery manifold : Has been detailed elsewhere in this document. Erection, testing and commissioning, operation and maintenance : Has been detailed elsewhere in this document. Small Power, lighting distribution and illumination system : Has been detailed elsewhere in this document. Emergency D.C. lighting : Has been detailed elsewhere in this document. Illumination Level and Circuit Loading : Has been detailed elsewhere in this document. Specific Requirement : Has been detailed elsewhere in this document. Commissioning/Mandatory spares : Has been detailed elsewhere in this document. Tools & Tackles : Has been detailed elsewhere in this document. Guarantee : Has been detailed elsewhere in this document. DTS : Detailed Tender Specification. Page 230
Chapter 21 Water Treatment Works. 21.1 Existing water treatment plant. 2 Nos. water treatment plant were constructed under Phase I & <strong>II</strong> of the project for providing treatment of raw water lifted from the reservoir through 2 stage pumping system. The first WTP of capacity 34.05 MLD were completed and commissioned in 1986 and the 2 nd WTP of capacity 17.25 MLD were commissioned only few years back. 21.2 The constructional features of different units of the existing 34.05 MLD water treatment plant. Inlet, stilling chamber & measuring channel: Raw water is received in the stilling chamber 2mx2mx2m whereafter it flows through a Parshall Plume in the raw water channel for measurement of flow rate. The raw water channel is 2m wide and the Parshall Flume have a throat width of 1.22m. Chemical treatment: Alum in solution is used as coagulant. For preparation of solution, two tank are provided, each 3mx3mx1.75m depth. Each tank hold sufficient solution of 5% strength to provide a dosage for eight hours for a flow of 34.05 MLD. Solution gravitate to a constant head dosing tank placed over the raw water channel and solution flow directly from the dosing tank into raw water through a taper needle valve at a preset dosage which will adjust itself automatically to any change in flow rate o£ raw water. Lime suspension is prepared in two lime mills, each capable of providing dosage of lime solution for eight hours for a flow of 34.05 MLD. The dose, diluted with about five times its own volume, gravitate to the raw water stilling chamber. Flash mixer : After measurement, raw water enter a flash mixing well of 3.20m dia x 1.50m mix depth where the coagulant added is rapidly and intimately mixed. DTS : Detailed Tender Specification. Page 231
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Government of Meghalaya Public Heal
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1.1 Materials. Chapter 1 General Te
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IS: 1786 - 1985 Specification for h
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IS: 1500 - 2005 Methods for brinell
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Cement bags brought to the site mus
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Laying : The cement, sand and stone
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1.6 Reinforced Cement Concrete. All
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Expansion joints. Expansion joints
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1.16 Conservation water. Special Co
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oads, protection to existing underg
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the relevant standards and codes in
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1.33 Demolition. Before commencing
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Motors, gearing, transmission, elec
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Construction Camps :The Contractor
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2.1 Description. Chapter 2 Submitta
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3.1 Clearing site. Chapter 3 Site p
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Chapter 4 Dismantling 4.1 Dismantli
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5.1 Description. Chapter 5 Earth Wo
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The trench shall be so dug that the
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5.12 Excavation for appurtenance. E
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5.16 Caution cum information boards
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f) Before and during the backfillin
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6.1 Brick work. Masonry Mortars: Pr
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6.4 Scaffolding. Scaffolding shall
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Half or cut bricks shall not be use
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7.1 Concrete. General: Chapter : 7
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) Gradation: (I) Unless otherwise d
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Dropping of concrete from an excess
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Cement: Cement shall, whether suppl
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Coarse aggregate shall be piled in
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Grades of concrete: The concrete sh
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Uniformity of mix: Concrete shall b
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Vibration: Vibrators shall be inser
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Jointing: The face of a constructio
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8.1 Material. Chapter 8 Form Work A
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8.3 Removal of Forms and Shoring. F
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9.1 General. Chapter : 9 Reinforcem
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9.6 Dowels. Where and as designated
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(viii) Increased cover thickness sh
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10.1 Definitions. Chapter : 10 Plas
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The fine aggregate for cement morta
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Roughness: Smooth surfaces of in-si
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In suspending the work at the end o
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11.1 Transportation. Chapter - 11 L
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At the end of each day, the end of
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Where joints are left uncovered unt
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11.9 Flanged joints. Flanged joint
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A. Sluice valves 12.1 General. Chap
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12.6 Lubrication. All the points wh
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13.1 Fixing of Sluice Valves. Gener
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Preparation: The air valves and the
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14.1 Pressure gauges Material: Chap
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Chapter - 15 Electrical Works and P
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7. The bidder should enclose along
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15.9 Approval by fire insurance aut
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All spare contacts and terminal of
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Painting: The panels shall undergo
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Auto Transformer Starters : The aut
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Contactors: The three pole contacto
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While removing the cable from the d
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Testing of Cables: Once the cable i
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Point Wiring: Point wiring shall in
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Control at point of entry supply: T
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A conductor shall be carried in an
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5 Amps and 15 Amps socket outlet sh
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All outlets such as switches, wall
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Outdoor Luminaire: The luminaire sh
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All earth wires and earth continuit
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The capacitor bank may comprise of
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15.22 Pumping Machineries. Applicab
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Iron and steel are in general to be
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Workmanship: Workmanship and genera
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On removal from the galvanising bat
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They shall be efficiently lubricate
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Codes and standards: The design, ma
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The design of bearing should be suc
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Base plate: The common base plate f
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The commissioning tests shall be pe
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Motor Winding: Motor winding shall
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Chapter - 16 Technical specificatio
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vii) This region has experienced a
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16.7 The reduced level at different
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Chapter 17 Technical specification
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Chapter 18 Technical Specification
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(b) Pits for joints : When welding
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All excavated materials shall be th
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Supply of paints with approved qual
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shall be lowered into the trench by
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2. Protective devices, such as reli
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Education of crew members as to the
Page 181 and 182: The anchors provided at the mid-poi
Page 183 and 184: Chapter 19 Technical specification
Page 185 and 186: including laying of the Rising Main
Page 187 and 188: The pumps shall be of non pull out
Page 189 and 190: 5. a) Centre to centre spacing (bet
Page 191 and 192: The pump TBH shall be calculated by
Page 193 and 194: Bidder for solo and parallel operat
Page 195 and 196: i) Seal ring/ earing ring : Materia
Page 197 and 198: 4. Detail Particulars : The technic
Page 199 and 200: The Bidder shall furnish with the o
Page 201 and 202: 19.14 Starters : In selection of st
Page 203 and 204: Pressure gauge (IS 3624): The deliv
Page 205 and 206: Bidder shall be provided with one p
Page 207 and 208: 19.23 Valves & Specials for Pump in
Page 209 and 210: 19.30 Equipment transfer trolley. O
Page 211 and 212: Each installation shall include the
Page 213 and 214: Fixtures shall be fully wired up to
Page 215 and 216: Exhaust Fan: For ensuring open vent
Page 217 and 218: Miscellaneous electrical safety dev
Page 219 and 220: For long run, junction/pull boxes s
Page 221 and 222: Foundation & Civil Works : Equipmen
Page 223 and 224: e) Exhaust fan: For ensuring open v
Page 227 and 228: It is the responsibility of Bidder
Page 229 and 230: In the design selection of pumping
Page 231: Bearings : Has been detailed elsewh
Page 235 and 236: Sterilisation : For sterilisation o
Page 237 and 238: ii) Agitator drive comprising elect
Page 239 and 240: xx) Air blower of 500 cfm capacity
Page 241 and 242: The contractor shall assume full re
Page 243 and 244: Filters House and associated plant
Page 245 and 246: Control room & laboratory : The var
Page 247 and 248: Sl. No. Parameter 28. Selenium (mg/
Page 249 and 250: The chlorinators shall be arranged
Page 251 and 252: 21.12 Filtration Works. The works t
Page 253 and 254: 21.16 Filter media and charging. Th
Page 255 and 256: Slow Start : Following cleansing op
Page 257 and 258: The gears between the driver and dr
Page 261 and 262: Special foundations in poor soil :
Page 263 and 264: Protection of property : Trees, shr
Page 265 and 266: 22.6 Pipe laying. Laying of pipes u
Page 267 and 268: i) By Hacksaw : Hand or power opera
Page 269 and 270: ii) Transportation : Pipes should b
Page 271 and 272: iv) It is prudent to begin testing
Page 275 and 276: The contractor shall assume full re
Page 277 and 278: Though the wall thickness of the pi
Page 279 and 280: Butterfly valve for individual pump
Page 281 and 282: Chapter 24 Technical Specification
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Chapter 25 Technical specifications
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Erection/laying/hoisting, fitting a
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A. Electro-Mechanical Chapter 26 Ve
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PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

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