Prior to the issuance of the grading permit, the developer shall post a deposit with the Director of Public Works in the amount and in the form specified by the Director of Public Works. The deposit funds held in trust shall be dispersed to the quality control engineer by the Director of Public Works under the terms of the agreement between the City and the quality control engineer to pay for the services of the quality control engineer. The Director of Public Works will notify the developer if and when it becomes apparent that the deposit will be exhausted and the developer shall make such additional deposit as required by the Director of Public Works. If the developer fails to submit such additional deposit by the date specified by the Director of Public Works, the Director of Public Works shall suspend or revoke the grading permit, in accordance with the provisions of the Uniform Building Code and order that work on the project cease. Upon completion of the work, unused funds shall be returned to the developer within sixty (60) days following the final grading and quality control inspection approvals. Billings shall be in accordance with the City's accounting procedures.