Specifications include, but are not limited to: ROCK SALT & CALCIUM CHLORIDE. Rock salt used for ice removal shall be produced by crushing natural depositsof sodium chloride. Material produced by recrystalization of salt solutions will not be accepted. CHEMICAL COMPOSITION. The rock salt shall conform to the following requirements asto chemical composition:Sodium chloride (as NaCl), Minimum percent95.0%. GRADING. The rock salt shall conform to the following gradation requirements as determinedby laboratory sieves (U.S. Standard Sieve Series):Sieve DesignationPercent Passing3/8 inch100No. 485-100No. 815-35No. 300-15. PACKAGING AND MARKING. The rock salt shall be delivered in bags or sacks containingnot more than 50 pounds each or in bulk when requested. When delivery is made in bags orsacks, the name of the manufacturer and net weight shall be legibly marked on each container.The percentage of sodium chloride guaranteed by the manufacturer shall be noted on theshipping report or legibly marked on the containers. When delivery is by bulk, the manufacturershall furnish certified analysis giving sodium chloride content of the rock salt furnished. Two types of calcium chloride are covered as follows:Type 1 - Regular flake calcium chloride.Type 2 - Concentrated flake, pellet or other granular calcium chloride
