Specifications include, but are not limited to: This specification covers sodium chloride (rock salt) intended for use as deicer on city streets. The material herein shall meet the American Society for Testing and Materials (ASTM) Specification D 632-84 (Reapproved 1989) in Quality and Content. CLASSIFICATION: This specification covers sodium chloride obtained from natural deposits such as the underground salt dome located at Grand Saline, Texas. CHEMICAL REQUIRMENTS: The sodium chloride shall conform to the following chemical composition: Sodium chloride (NaCl), minimum, % 95.0; PHYSICAL PROPERTIES: Gradation –Type I. The Gradation of type I sodium chloride, when tested by means of laboratory sieves, shall conform to the following requirements for particle size distribution: Sieve Size Weight % Passing; ½ in, (12.5mm) 100; 3/8 in, (9.5mm) 95 to 100; No.4 (4.75mm) 20 to 90; No.8 (2.36mm) 10 to 60; No.30 (600mm) 0 to 15
