If the department finds, after the opening of bids, that facts exist that would disqualify the lowest bidder, or that the lowest bidder is not competent or responsible in accordance with the standards and criteria for prequalifying contractors, the department shall reject the bid despite the prior prequalification of the bidder. No contract may be awarded to a bidder not qualified to bid on it at the time fixed for receiving bids.
RCW 47.60.740