This Sub-class includes: •extraction of ceramic, refractory and/or other clay from the earth •extraction of sand from the earth. Units in this Sub-class are primarily engaged in one or more of the following: •extraction and/or dredging of industrial sand and/or sand from construction •quarrying of sand
•stone quarrying, see 08101 •mining of chemical and fertiliser minerals, see 08900 •shaping, pulverising, grinding, and/or other treatment of clay and/or sand not performed in conjunction with extraction or quarrying activities, see 2399