tender for design, supply, transportation, construction, installation, testing, and commissioning of 3 nos. of sewage treatment plants (stps) of total 3.0 mld capacity at basugaon mb (1 mld), bijni mb (1.0 mld) and tangla mb (1.0 mld) using waste stabilization pond (wsp) technology on design, build, and operate (dbo) basis with sewage pumping station, nallah/drain outfall interceptor and diversion works, along with all associated civil, electrical, mechanical, piping, and instrumentation works, as well as operation and maintenance (o&m) of the complete system for a period of five (05) years after successful commissioning under sbm (u) 2.0.