remaining work and comprehensive operation & maintainance including repairs of civil & mechanical structure, supply of spare parts, all chemical,deployment of manpower, checking of status of supply in command area,repairing of leakages,backwash, maintaining log book, data compilation,submmission of daily /weekly /monthly and yearly report of both raw and treated water quality , getting endorsed/ tested by state laboratries once in every month ,replacing the filter media / damaged parts of any machinery /the machinery as a whole , annual /bi-annual maintainace of all built -up /installed structures /units under the scheme ,including round the clock watch & ward to ensure potable water to the benificiaries of the scheme for sixty months (five years) in block shambo,panchayat :ssb-1,ward no.4,5 under mukhyamantri nischay yojna(quality affected ) p.h. division begusarai for year 2024-25.