When any work under any street excavation permit is completed and all the provisions of this chapter have been complied with and all orders of the City have been fulfilled with respect to the work or the object for which the permit was obtained, the Director of Finance shall issue a warrant to return the excess of the cost to the person who made the deposit. If the deposit provided for in Section 901.02 is insufficient to reimburse the City the Director of Finance shall certify the deficiency to the Service Director who shall thereupon notify the applicant for the permit of the deficiency and proceed to collect the same from the permit applicant.