Specifications include, but are not limited to: Sodium Chloride Crushed Rock Salt The sodium chloride (NaC) content in the crushed rock salt shall be no less than 95.0% and meet ASTM D632 Specifications for Sodium Chloride Type I, Grade 1 Gradation Requirments Sieve Size 1/2" (12.50 mm) Percent Passing Sieve (by weight) of 100 Chloride Type I, Grade 1 Gradation Requirments Sieve Size 3/8" (9.50 mm) Percent Passing Sieve (by weight) of 95-100 Chloride Type I, Grade 1 Gradation Requirments Sieve Size No. 4 (4.75 mm) Percent Passing Sieve (by weight) of 20-90 Chloride Type I, Grade 1. Gradation Requirments Sieve Size No. 8 (2.36 mm) Percent Passing Sieve(by weight)of 10-60 Chloride Type I, Grade 1. Gradation Requirments Sieve Size No. 30 (600 um) Percent Passing Sieve (by weight) of 0-15.