Specifications include, but are not limited to: Alum, Al2(SO4)3, shall be furnished as a liquid aluminum sulfate solution. The liquid alum shall conform to the current version of AWWA Standard 8403 (the most recent version). Solution Strength, % as Dry Alum: 48.5 (approx.). % as Total Al2O3: 8.3 (approx.). Specific Gravity, 15.6°C (60°F): 1.335. pH Liquid Alum: 2.3 (approx.). lbs./gal., U.S.: 11.13 lbs. Dry Alum/gal.: 5.4. This material shall be certified as suitable for contact with, or treatment of, drinking water by an accredited certification organization in accordance with ANSI/NSF Standard 60, Drinking Water Treatment Chemicals - Health Effects. The bid price 'per dry pound' shall be based on the weight of alum in the liquid alum solution (as opposed to the weight of solution delivered). Delivery Method: Bulk; Unloading Method: The fill pipe connection is located near ground level. The supplier shall pump the material to the storage tank located 14' above ground level. Storage Capacity: 8,000 gallons; Typical Delivery: 48,000 liquid pounds (~4,500 gallons); Delivery Frequency: Approximately monthly; Annual Usage: ~300,000 # dry weight.
