If the principal or surety deposits the estimated cost plus 25 percent as set forth in the notice, the Director of Public Works shall cause the required work to be completed. The unexpended money shall be returned to the depositor at the completion of such work, together with an itemized accounting of the cost. The principal and surety shall hold the City blameless from any liability in connection with the work so performed by the City or the contractor employed by the City. The City shall not be liable in connection with such work other than for the expenditure of said money. (Ord. 1205 § 2, 1969; prior code § 27.402(5)).