Operation and Maintenance of distribution system and rising main pipe line ( CI/ DI/ UPVC/ HDPE ) and Operation and Maintenance of Arsenic cum Iron Removal Plant of Modified Sujapur sadipur Model ( AIRP Capacity- 51. 19cub. m/ Hr ), ( AIRP Capacity- 64. 00cub. m/ Hr ) AND ( AIRP Capacity- 45. 69cub. m/ Hr ) and allied works of Moshimpur, Rampara Faridpur and Sadhukhali ground Water Supply Scheme under Berham