1. Maintainance of Prefabricated Single Tank Based Modular Capacity 05 TPD Bio-Gas-Plant in Connection with Solid Waste Management at Newtown, Kolkata under NKDA for 02 Years. 2. Operation & Maintenance of Weigh Bridge (Capacity 60 MT) at Block CG in Action Area -1, New Town, Kolkata for 02 (Two) years.