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 circuit house & annex building 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)