529Work must be supervised by named supervisor

529 Work must be supervised by named supervisor A person who holds an asbestos removal licence must ensure that asbestos removal work authorised by the licence is supervised by a supervisor named to the regulator by the licence holder. Note for regulation 529 Chapter 8A Crystalline silica Part 8A.1 Preliminary matters 529A Definitions In these Regulations: crystalline silica means crystalline polymorphs of silica and includes the following substances: (a) cristobalite; (b) quartz; (c) tridymite; (d) tripoli. crystalline silica substance (CSS) means material that contains at least 1% crystalline silica, determined as a weight/weight (w/w) concentration. Example for definition crystalline silica substance (CSS) Engineered stone is a type of CSS. engineered stone means a CSS that: (a) is an artificial product; and (b) is created by combining natural stone materials with other chemical constituents such as water, resins or pigments; and Work Health and Safety (National Uniform Legislation) Regulations 2011 407 (c) becomes hardened; but does not include the following: (d) concrete or cement products; (e) bricks, pavers or other similar blocks; (f) ceramic wall or floor tiles; (g) grout, mortar or render; (h) plasterboard; (i) porcelain products; (j) sintered stone; (k) roof tiles. processing, in relation to a CSS, means any of the following: (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; (b) the use of roadheaders to excavate material that is a CSS; (c) the quarrying of a material that is a CSS; (d) mechanical screening involving a material that is a CSS; (e) tunnelling through a material that is a CSS; (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.