| 212319 |
Trap rock crushed and broken stone mining and/or beneficiating |
| 212319 |
Verde' antique crushed and broken stone mining and/or beneficiating |
| 212319 |
Volcanic rock crushed and broken stone mining and/or beneficiating |
| 212321 |
Common sand quarrying and/or beneficiating |
| 212321 |
Construction sand and gravel beneficiating (e.g., grinding, screening, washing) |
| 212321 |
Construction sand or gravel dredging |
| 212321 |
Gravel quarrying and/or beneficiating |
| 212321 |
Pebbles (except grinding) mining and/or beneficiating |
| 212321 |
Sand and gravel quarrying (i.e., construction grade) and/or beneficiating |
| 212321 |
Sand, construction grade, quarrying and/or beneficiating |