A/R and M/O to various Residential and Non-Residential Buildings under sub-division WB-13 and WB-14 and WB-15 during 2026-27 (SH- Mechanized cleaning of underground and overhead RCC/PVC water storage tanks of West Division).

Mechanized cleaning of Underground & RCC/PVC OH tank with six stage process motioned as under:- I. Mechanical Dewatering. II. Desilting and removal of left over dirty water and sludge with sludge removal pump. III. Cleaning of walls, ceiling and floor by high pressure water jet with the help of equipment which create a pressure of 10 to 150 bar with antibacterial agent license from Food and Drugs administration (FDA) and certificate by a Govt. approved laboratory for non-toxicity of antibacterial for tank cleaning as per OECD guidelines for disinfecting the tank from all harmful Bacteria, Fungi, Algae & Protozoan. The active ingredient shall be Banzalkholum Chloride solution IP 4% W/V/Equivalent similar compound as per the direction & approved by Engineer-in-Charge. IV. Removal of remaining sludge from the floor with the help of industrial Vacuum cleaner. V. Spraying of non-toxic, bio degradable eco friendly anti-bacterial agent for tank cleaning certificate by Govt. approved laboratory as per the OECD guidelines 423 adopted on 17th December 2001 for disinfection the tank from all the harmful pathogens. VI. Treatment of inside the tank by exposing U.V. radiation to kill further suspended or floating bacteria if any. PVC/RCC O/H tank upto 5,000 litre capacity.

Mechanized cleaning of Underground & RCC/PVC OH tank with six stage process motioned as under:- I. Mechanical Dewatering. II. Desilting and removal of left over dirty water and sludge with sludge removal pump. III. Cleaning of walls, ceiling and floor by high pressure water jet with the help of equipment which create a pressure of 10 to 150 bar with antibacterial agent license from Food and Drugs administration (FDA) and certificate by a Govt. approved laboratory for non-toxicity of antibacterial for tank cleaning as per OECD guidelines for disinfecting the tank from all harmful Bacteria, Fungi, Algae & Protozoan. The active ingredient shall be Banzalkholum Chloride solution IP 4% W/V/Equivalent similar compound as per the direction & approved by Engineer-in-Charge. IV. Removal of remaining sludge from the floor with the help of industrial Vacuum cleaner. V. Spraying of non-toxic, bio degradable eco friendly anti-bacterial agent for tank cleaning certificate by Govt. approved laboratory as per the OECD guidelines 423 adopted on 17th December 2001 for disinfection the tank from all the harmful pathogens. VI. Treatment of inside the tank by exposing U.V. radiation to kill further suspended or floating bacteria if any. PVC/RCC underground & overhead water storage tank having capacity of above 5,000 litre.