001. Deicing Salt (Sodium Chloride) shall be either Rock Salt #1-medium CC or Solar Salt obtained by evaporation of seawater. The delivered product shall comply with ASTM D 632, Type 1, Grade 1, and Missouri Department of Highway Standards MGS92- 05F. 1. Sodium Chloride (ROCK SALT) Sodium chloride shall be in the form of Rock Salt containing at the time of delivery no more than 2.0 percent moisture based on dry weight. 1.0 percent if heated at 110° C for two (2) hours. 2. CHEMICAL COMPOSITION Sodium Chloride (Deicing Salt), when dried to constant weight as specified above, shall conform to the following requirements: Sodium Chloride (NaC1), min. percent 95.0 Solubility in boiling distilled water, min., percent 99.0 3. GRADING Sodium Chloride (DEICING SALT), when dried as specified above, shall conform to the following requirements as determined by laboratory sieves.
