Accidents involving California Construction Site Injuries and California Workers Compensation insurance coverage. Here, in this video, lawyer Mark Blane explains the intricacies of when you are injured at work but by some person or entity not connected with your employer. These are known as third party cases. This means, you could have two cases to pursue. One against the California workers compensation coverage, and one against the third party causing your injuries (directly). Mark Blane has had experience (since 1999) handling both of these claims at the same time for injured California workers.