Wash. Admin. Code § 296-17A-3103
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.
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.
Wash. Admin. Code § 296-17A-3103
07-01-014, recodified as § 296-17A-3103, filed 12/8/06, effective 12/8/06. Statutory Authority: RCW 51.16.035. 98-18-042, § 296-17-573, filed 8/28/98, effective 10/1/98; 96-12-039, § 296-17-573, filed 5/31/96, effective 7/1/96; 85-24-032 (Order 85-33), § 296-17-573, filed 11/27/85, effective 1/1/86; Order 73-22, § 296-17-573, filed 11/9/73, effective 1/1/74.