Specifications include, but are not limited to: 1. The liquid Polyphosphate bid shall be a solution of sodium hexametaphosphate produced as a sequestering agent for metal salts in potable water treatment. The liquid polyphosphate bid must successfully sequester calcium salts in the prevention of calcium deposition on essential water treatment facilities and machinery. All solutions provided must be slightly viscous clear liquids, free from visible foreign matter, sediment, and turbidity. The liquid polyphosphate shall not contain any impurities in quantities capable of producing deleterious or injurious effects on the health of those consuming potable water that has been properly treated 2. The liquid polyphosphate solution bid shall contain 36 +-2% polyphosphate as PO4, and must be a stable solution, with no precipitation of phosphate, or reversion to orthophosphate while in bulk storage as neat solution. 3. A certified analysis must be included within the completed bid package specifying the percent polyphosphate, as PO4, of the liquid polyphosphate solution bid. Analytical procedures for determining this value must be approved by the U.S. E.P.A. and are found in the current edition of Standard Methods for the examination of Water and Wastewater. A product data sheet should also be included within the completed bid package.
