SEC. 641. INSPECTION TO BE FURNISHED WHEN COST DEPOSITED.

   When said amount of money is deposited, it shall thereupon be the duty of said Director of Public Works to furnish said engineering inspection.

SEC. 642. ADDITIONAL DEPOSIT MAY BE REQUIRED.

   Should the monthly cost and expense of such engineering inspection amount to more than said estimate, the person, firm, or corporation concerned shall thereupon be immediately notified and required to make an additional deposit with the Director of Public Works of an amount sufficient to complete the monthly cost of said inspection as estimated by the Director of Public Works, which sum when paid shall be deposited as aforesaid, and no further engineering inspection service shall be performed or furnished until such additional deposit is made with the Director of Public Works.

SEC. 643. EXCESS DEPOSIT TO BE CREDITED.

   Should the monthly cost and expense of such engineering inspection be less than the amount deposited then the surplus or excess existing in the amount deposited over the total actual cost of such engineering inspection shall be credited on account of such continued inspection as may be required or when the work has been completed be refunded to the person, firm or corporation by whom such funds were originally deposited.

SEC. 644. FORMS AND FISCAL PROCEDURE TO BE PRESCRIBED BY CONTROLLER.

   The Controller shall prescribe the forms and fiscal procedure under the provisions of this Article.