The city of Salinas entered into a contract with Souza & McCue Construction Co. to construct a sewer. City officials knew unusual subsoil conditions (including extensive quicksand) existed that would make performance of the contract unusually difficult. This information was not disclosed when city officials advertised for bids. The advertisement for bids directed bidders to examine carefully the site of the work and declared that the submission of a bid would constitute evidence that the bidder had made an examination. Souza & McCue was awarded the contract, but because of the subsoil conditions, it could not complete on time and was sued by Salinas for breach of contract. Souza & McCue counterclaimed on the basis that the city had not revealed its information on the subsoil conditions and was thus liable for the loss. Was the city liable? [City of Salinas v Souza & McCue Construction Co., 424 P2d 921 (Cal App 3d)]