Approximate annual requirements: 50,000 to 65,000 gallons (5.4 lb/gal Al2(SO4)3.14H2O). 1. Material shall be the purified type, meeting the AWWA Standard Specifications B-403-16, or latest revision. Supplier shall include certificate of compliance with ANSI/NSF Standard 60. If it does not meet the specifications, the supplier will be required to remit payment to the laboratory for the analysis, and the material will be rejected. *2. Material shall be delivered to site at a solution of 5.4 lb/gal Al2(SO4)3.14H2O. Dry weight basis of that material shall be 8.3 Al2O3. Must contain less than 10ppm of iron. 3. Bid shall be FOB Butte, Montana, Big Hole Water Treatment Plant and/or Moulton Water Treatment Plant, telephone (406) 723-9429, and/or Metro Sewer Wastewater Treatment Plant, telephone (406) 497-6550, Attn: BSB Public Works Department.