Periodical tank cleaning and disinfecting of under ground water reservoir and overhead tanks BY MECHANICAL PROCESS at 63, N.S. Road, Govt. Premises (Jessop Building), Kolkata - 700001 during the period from March 2026 to February 2027

Labour and hire charges of machineries for tank cleaning operation by submerssible water pump to drain out excess water removal of sludge by suction process by using machine, cleaning all walls, ceiling and floor by high jet machine removal of deposited sludge by vacum section machine after doing the same disinfection operation to be done by scraping biodegradable anti-bactorial non-toxic agent like H202 (Hidrogen per oxide) of volume 8.48% as per IS specification and spreding odour free chemical agent like TREND DEO (1.003 ml) and finally treatment of E.V. radiotor to all wall and floor for atleast five minutes. The work shall be completed in all wall and floor for atleast five minutes. The work shall be completed in all tackles, tools and plants, labour and sonsumerable materials including transportation charges and removal of all machineries after completion of job.

Collecting sample of water for bacteriological and chemical test from any depth at any time during execution of work including hire and labour charges for tools and plants and sterilising the equipments, paying all charges and fees, testing etc. complete in all respect as per direction.

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