EOI FOR EMPANELMENT OF AGENCY FOR PROVIDING SKILLED MAN POWER SERVICES AS AND WHEN AND WHERE REQUIRED WITH ALL EQUIPMENTS & MACHINERIES ( OUTSOURCING ) FOR OPERATION AND MAINTENANCE OF URBAN WATER SUPPLY SCHEME UNDER ‘PEYJAL NISCHAY YOJANA’OF NAGAR NIGAM PATNA UNDER URBAN DEVELOPMENT WATER SUPPLY DIVISION PATNA NAGAR NIGAM, PATNA