529AMeaning of processing in relation to crystalline silica substances and related terms

529A  Meaning of processing in relation to crystalline silica substances and related terms  (1) In these Regulations, processing in relation to a CSS means:  (a) the use of power tools or mechanical plant to carry out an activity involving the crushing, cutting, grinding, trimming, sanding, abrasive polishing or drilling of a CSS; or  (b) the use of roadheaders to excavate material that is a CSS; or  (c) the quarrying of a material that is a CSS; or  (d) mechanical screening involving a material that is a CSS; or  (e) tunnelling through a material that is a CSS; or  (f) a process that exposes, or is reasonably likely to expose, a person to respirable crystalline silica during the manufacture or handling of a CSS.  (2) In these Regulations, crystalline silica substance (CSS) means material that contains at least 1% crystalline silica, determined as a weight/weight (w/w) concentration. Note: Engineered stone is a type of CCS.  (3) In these Regulations, crystalline silica:  (a) means crystalline polymorphs of silica; and  (b) includes the following substances:  (i) cristobalite;  (ii) quartz;  (iii) tridymite;  (iv) tripoli.  (4) In these Regulations, engineered stone:  (a) means a CSS that:  (i) is an artificial product; and  (ii) is created by combining natural stone materials with other chemical constituents such as water, resins or pigments; and  (iii) becomes hardened; but  (b) does not include the following:  (i) concrete and cement products;  (ii) bricks, pavers and other similar blocks;  (iii) ceramic wall and floor tiles;  (iv) grout, mortar and render;  (v) plasterboard;  (vi) porcelain products;  (vii) sintered stone;  (viii) roof tiles.