operation and maintenance of pipeline and ms/fr i.e.p. & uv/ro with or without chiller of different capacity at different places related to divisional commissioner banglow at jalpaiguri by regular back washing, cleaning, servicing and routine checkup (1st week of every calendar month) including repairing and replacement of any damage parts (within 3 days) with supply of operator, tools and plants, replacing of filter media (if necessary), catalytic media, including periodical (every after 3 months) water testing report complete as per direction of e.i.c.under jalpaiguri division, p.h.e. dte. (w.e.f. 01/11/2024 to 31/10/2025)