Name of Work: Biannual Contract for mechanized cleaning of overhead water tanks and sumps in NFC Plant and Township inHyderabad
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Item Description
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1. The contractor shall follow relevant IS codes/technical specifications for execution of work.2. The contractor shall maintain good workman ship and follow safe working procedures during the work.3. All works shall be executed while following due safety procedures and wearing adequate PPEs.4. The contractor shall make his own arrangements such ladder, scaffolding etc.for approaching or accessing the tanks. No extra payment will be made in this regard.5. Contractor has to deploy expert agency for the work who has at least 2 years of experience in tank/sump cleaning works.6. Contractor has to provide minimum two nos of 100 liters PVC/HDPE tanks for storage of water for occupants use before taking up tank cleaning at no extra cost. Maximum 16 nos of 100 liters PVC/HDPE tank may be required for occupants use at a time. The tanks shall be provided during the cleaning period of tank and will be taken back by the contractor after completion of work.7. The date of cleaning shall be marked on the side of tank body with the help of stencil and paint. The old date already written on tank should be removed.8. The malba, silt, rubbish, debrisshall be disposed off as per direction of Engineer-in-Charge. 9. If during cleaning any GI fittings or ball cock is damaged that is to be repaired by contractor at his own cost and nothing extra will be paid on this account.10. The directions given by EIC for the work will be final and binding.
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Mechanized Cleaning of PVC/HDPE water Storage tanks/sumps by following Steps:-1) Mechanized Dewatering of tank.2) Sludge Removal of Tank.3) High Pressure Cleaning- Genrating pressure of around 120-140 Bars.4) Vacuum De watering of tank.5) Applying of Anti bacterial spray- food grade sodium hypchlorite or as directed by EIC.6) Rinsing the tank with water and dewatering of tank.7) Exposure to UV radiation having bactericidal wave length for atleast 10 minutes.
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tanks of size Upto 1000 litre.
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tanks of size 1001 litre to 2000 litre
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tanks of size 2001 litre to 3000 litre
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tanks of size 3001 litre to 5000 litre
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tanks of size 5001 litre to 10000 litre
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Mechanized Cleaning of RCC/Metal water Storage tanks/sumps by following Steps:-1) Mechanized Dewatering of tank.2) Sludge Removal of Tank.3) Application of Desilting agent on all wall and floor.4) High Pressure Cleaning- Genrating pressure of around 120-140 Bars.5) Vacuum De watering of tank.6) Applying of Anti bacterial spray- food grade sodium hypchlorite or as directed by EIC.7) Rinsing the tank with water and dewatering of tank.8) Exposure to UV radiation having bactericidal wave length for atleast 10 minutes.
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