CHEMICAL COMPOSITION: Sodium chloride shall conform to a chemical composition of a minimum of 95%. Variations of less than 95% but above 93% will result in acceptance at reduced payment as provided in Section III, Penalties and Price Adjustments. . SALT GRADATION: Rock salt shall conform to the following particle size distribution specifications as determined by laboratory sieves: • Passing a ½” sieve (12.50mm) 100% • Passing a 3/8” sieve (9.50mm) 95% - 100% • Passing a No. 4 sieve (4.75mm) 20% - 80% • Passing a No 8 sieve (2.36mm) 10% - 50% • Passing a No 30 sieve (0.60mm) 0% - 10% Because of restrictions used to calibrate salt on Department sanders, the 1/2” gradation requirement is critical. The contractor will be required to re-screen the sodium chloride for continued oversize deliveries.
