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 of existing scheme ( AIRP Capacity- 130. 00 cub. m/ Hr ) and Arsenic cum Iron Removal Plant of Gobordanga Model ( AIRP Capacity- 16. 69 cub. m/ Hr ) and allied works of Maya and Goukhana ground Water Supply Sch