WAC 296-17A-3103. Classification 3103

3103-01 Cement or lime: Manufacturing Applies to: Businesses engaged in the manufacture of cement or lime. Cement is a mixture of various granulated raw materials. Cement may be sold dry or mixed with water and coarse aggregate to make concrete. Raw materials may include: • Alumina; • Clay; • Gypsum; • Iron ore; • Limestone; • Shale; • Silica sand; • Slate. The cement manufacturing process includes: • Crushing and grinding the raw materials into a powder state; • Blending materials with water to create a slurry; • Kiln burning at high temperatures which chemically changes the mixture; • Combining the mixture with gypsum; • Grinding into the final product. Lime production involves a process similar to cement manufacturing, using crushing and blending machinery and large kilns. Cement and lime manufacturers may own a limestone quarry as it is the major component of both products. Exclusions: • Worker hours engaged in quarrying of raw material are reported separately in classification 1704; • Ready mix concrete dealers are classified in 3101; • Manufacturing of concrete products is classified in 3105. 3103-02 Lightweight aggregate building or insulation material: Manufacturing Applies to: Businesses engaged in the manufacture of lightweight aggregate building material or insulation material. Types of products covered by this classification include, but are not limited to: • Expanded shale aggregate; • Fiberglass; • Magnesite; • Perlite; • Pozzolan; • Vermiculite. The manufacturing process includes crushing of raw materials and blending and heating of materials in large furnaces. Exclusions: • Worker hours engaged in quarrying of raw material are reported separately in classification 1704; • Manufacturing fiberglass products is classified in the appropriate manufacturing classification.