The supplier under this contract shall furnish "approved" corrosion control chemicals for bulk liquid solution for water treatment certified by the NSF to conform to ANS/NSF Standard 60/61. Due to potential problems with encapsulated bacteria in the distribution system and the current continuous use of chlorine in the range of 0.5 to 1.5 parts per million (PPM), the bidder shall provide some documentation that the corrosion control chemical does not increase bacteria counts in the distribution system and does not materially increase the overall chlorine demand. At the time of delivery, the supplier shall maintain a Cl2 residual in product of not less than 10 PPM of free chlorine residual. Chlorination shall not break down the product. NOTE: IF DOCUMENTATION IS NOT PRESENT AT THE TIME OF DELIVERY, THE LOAD WILL BE REJECTED. The corrosion control chemical shall have the following physical characteristics or approved equal: 1. Appearance/Color: Clear, water white; 2. Stability (shelf life): 1 year minimum; 3. pH range: 5.7 to 6.8; 4. Weight range: 11.4 to 11.8 lbs./gallon ; 5. Total Phosphate 35% +/- 2%; 6. Poly Phosphate 24.5% +/- 2%; 7. Ortho Phosphate 10% +/- 2%; 8. Poly:Ortho ratio 70:30; The anticipated delivery amounts are based on an average of the last few years, the estimated amount to be 3,000 gallons.
