QUARRYING OF STONE, SAND AND CLAY

This sub-class includes extraction of building and/or monumental stone from the earth. Units in this sub-class are primarily engaged in: - quarrying, rough trimming and/or sawing of monumental and/or building stone (e.g., marble, granite, sandstone, slate) - quarrying, crushing and/or breaking of limestone - mining of gypsum, anhydrite, chalk and/or uncalcined dolomite - extraction and/or dredging of gravel - breaking and/or crushing of stone and/or gravel

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: - extraction and/or dredging of industrial sand and/or sand from construction - quarrying of sand