Supplying Including Bottling Of Liquid Chlorine Gas In Departmental Cylinder (Tonners) As Per Is: 646/1986 Of Minimum 99.5% Purity Including The Cost Of Procuring Chlorine Gas From Bhopal (Madhya Pradesh) Detension Charges Of Vehicle At Durgapur Both Side Transportation Upto Fulbari Water Treatment Plant And Loading Of Empty Tonners Unloading Of Filled Up Tonners At Fulbari Etc. Under Siliguri Wa