Operation And Maintenance Of Automatic Computerised Bacteriological Treatment Plant Exion Make Or Similar Provided Various Station In Varanasi Division Bui, Gct, Arj, Sip, Cpr, Ci, The, Toi, Pou, Mhc & Gopg Including Supply Of Required Chemical, Spares & Operator For Treatment Of Water For The Period Of Five Years As Per Bis Parametre. 22 Nos