On December 18, 2009, in Suarez v. Pacific Northstar Mechanical, Inc., the California Court of Appeals created a duty mandating employers at multi-employer construction sites to report hazards at the site to which its employees have been exposed. The duty applies to all hazards at the site whether or not the employer installed, worked on or was otherwise responsible for the condition. Under California law, an employer who breaches such a duty is liable in tort.