1) Chemical Composition: Sodium chloride (NaCl), minimum content of 95 percent. Percent of sodium chloride shall be determined in accordance with ASTM D632 or the latest revision thereof. 2) Grading Requirements: The sodium chloride shall conform to the following requirements for particle size distribution, when tested by means of laboratory sieves. Detailed requirements for laboratory sieves are given in the ASTM 14.02 (or successor). a. Rock Salt Size Grading The salt, when tested in accordance with ASTM D632* or the latest revision thereof shall conform to the following requirements for particle size distribution: Sieve Size 1/2” - (12.5 MM), Percent Passing 100; 3/8” - (9.5 MM), 95 - 100 ; No. 4 - (4.75 MM), 20 - 90...