Construction of approach road, land development, FHTC Platform, laying of additional pipe line, protection of distribution pipe line and other allied works for Ground Water based MAGRAHAT piped water supply scheme to accommodate FHTC in MAGRAHAT- II block under South 24 Parganas W/ S Division- I, South 24 Parganas District for AUGMENTATION of surface water based Water supply scheme in the Arsenic Aff