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It’s your first day on a new job, and your excavator is digging out for the foundation when he finds the biggest field rock in North America lurking just below the surface. With a sheepish grin, he informs you that this will add about $10,000 to your job costs. Is there any way to pass on this unbudgeted cost to someone else? If your contract doesn’t specifically address concealed conditions, changed conditions, or differing site conditions, the default rule is that the bidder, whether that bidder is the general contractor or a subcontractor, is the one who must handle the problem. Bidders are supposed to make themselves familiar with all of the job-site conditions and bid accordingly. Unexpected