Specifications include, but are not limited to: The polydadmac (polydiallydimethylammonium chloride) bid must be one of the following: Polydene C-308P, Cytec Industries 587-C, Chemlink per chem 550, Nalco 8792, G.S. Robin 120, CPS chemical Agefloc WT-20HV, Callaway Chemical Jay Floc 842, Citichem Chemfloc 615, or Calgon Cat-Floc T, T2, 1 or 1S The polydadmac shall have a specific gravity of 1.03 - 1.05 g/mL, a viscosity less that 300 cps at 25 degrees Celsius, a shelf life of 12 - 24 months, and a freezing point of minus 5 degrees Celsius. The polydadmac must meet the requirements of the latest version of American Water Works Association Standard B451 and must be certified for use in drinking water under national sanitation foundation standard 60 to a dosage of 10 mg/L. Each vendor much bid only one polydadmac product, clearly indicating the product name on the bid.