acquisition of stock under nacd, a pwd, mayabunder during 2022-23. sw- supply of chemicals such as alumina ferric and bleaching powder at divisional store, nacd, apwd, mayabunder. acquisition of stock under nacd, a pwd, mayabunder during 2022-23. sw- supply of chemicals such as alumina ferric and bleaching powder at divisional store, nacd, apwd, mayabunder. , supply of alumina ferric grade-4 conforming to is: 299-2012 ( fifth revision ) with additional requirement for purification of water containing lead ( as pb ) with 20 pp max and ansenic ( as 203 ) 4pp max at divisional store mayabunder. , supplying of bleaching powder grade-i conforming to is: 1065 1989 ( reaffirmed 2003 ) suitable for chlorinationof drinking water packed in zinc coated drum ( isi ) having linear and tied separately with nyton ropes for the protection during transit. the packages used shall be free fromdirt or other foreign materials which are likely to cause decomposition of stable bleaching powder ( each drum containing 50kgs qty. ) at divisional store mayabunder.