Cleaning of water storage tanks and sumps by Mechanized method in Kalpakkam Township during the year 2025-2026

Amount

Cleaning and disinfection of RCC / HDPE Over head water tanks and underground sumps and elevated water storage reservoirs by mechanized method with following operations in various stages including all tools, materials, fuel, labour, safety belts, helmets, safety shoes, safety goggles, gloves, closing / opening of the scour valve, removing / refixing the manhole cover in position, etc., all complete as per specifications at all lifts and as directed by Engineer-in-charge. Cleaning Process: 1) Mechanized dewatering using sophisticated powerful submersible suction pumps for Sumps and wherever required for Over head tanks. 2) Sludge removal with sludge removal equipment and flush the floor of tank / sump. 3) Cleaning the walls, ceiling and floor of the tank / sump to remove all germs, bacteria and calcinations by using High Pressure rotary water jet cleaning equipment. 4) Vacuum cleaning with industrial vacuum cleaner to completely remove the dirt to make the tank / sump totally clean.5) Sterilization / disinfecting the tank / sump by spraying a Biodegradable anti-bacterial spray of approved make and dilution shall be as per manufacturer instructions with rotary jet pumps. 6) Radiation treatment of the tank using UV radiation to completely destroy the all floating bacteria to make water tank / sump thoroughly clean. Duration of UV treatment shall be between 1 min to 10 mins depending on the size of tank as approved by Engineer-in-charge. Note: 1) Care and all precautionary measures shall be taken to avoid asphyixation while cleaning. 2) Power required for operation of pumps and equipments will be provided at free of cost from department supply. However contractor shall make their own arrangement to tap the supply from DB / Power points near by location. 3) The labourers engaged for cleaning the water storage tanks/ sintex tanks / reservoirs/ sumps shall obtain the Medical certificate by DAE Hospital before attending the work.

Residential buildings over head tanks (Tank capacity - upto 2KL)

Residential buildings over head tanks (Tank capacity - 3KL)

Public buildings over head tanks (all types of tanks various capacity) (Rate shall be quoted for 10 Litre)

Residential buildings HDPE water tanks (Tank capacity - upto 1KL)

Residential buildings HDPE water tanks (Tank capacity - 2KL)

Residential buildings HDPE tanks (Tank capacity - 3KL)

Residential building over head tanks (Tank capacity - 28KL)

Elevated common water storage reservoirs (0.05MG capacity)

Elevated common water storage reservoirs (150KL capacity)

Under Ground Sump (0.25 MG capacity)

Under Ground Sump (0.10 MG capacity)

Under Ground Sump (upto 60KL capacity)

Under Ground Sump capacity between 200KL and 300KL

White washing one coat with shell lime over freshly cleaned surfaces of inside the sump walls including scaffolding, cost of materials, mixing with required glue, etc., all complete as per specifications at all lifts.

Labour charges for cleaning the existing cylindrical water tank support slab tops by removing unwanted materials, debris, dry leaves, etc., including removing vegetation growth along with roots, applying suitable chemicals, plugging the holes using CM 1:3, collecting and disposing of the waste materials by suitable means at locations within a 2 km lead, etc., all complete as directed by the Engineer-in-charge. Note: - 1) The rate quoted shall be inclusive of cleaning the over head tank support slab area. 2) The cleaning work shall be carried out along with cleaning of water tanks or as and when required as directed by EIC. 3) All labours deployed for cleaning shall strictly follow the safety rules and wear PPE.

C RAVIKUMAR (BID ID -3178966)

Bidder Name

C RAVIKUMAR

V.Krishnan Civil Contractor