- The International Association of Foundation Drilling, West Coast Chapter (WCC-ADSC) — agreement and signed copy.
- OSHA, Cal/OSHA, and Region IX OSHA Training Institute (OTI) Education Centers form Safety and Health Alliance, which culminated in the creation of curricula for OTI health and safety courses based on Cal/OSHA Title 8 CCR.
- March 14, 2007 IR#2007-11
Cal/OSHA encourages all employers to verify inspector's credentials
- Permits - excavations, trenches, construction and demolition and the underground use of diesel engines in work in mines and tunnels