Suppose we will do a portion of a superstructure and we will start from excavating the existing foundation done by others. We are already in delay in doing this portion of the superstructure and beacuse of that it became critical. After excavating we found that the foundation does not have the correct setting out and beacuse of that the structural design team need to do a re-design of the superstructure. Remember that we are already in delay but because of this another delay event we will further be delayed. Can we claim an EOT for that? Or the Client can argue that if we started our work on time, when it was not yet critical, then that setting out problem was found out earlier.