If new customers either inside or outside of the city limits request service from undersized or inadequate mains, the city may require the customer to contribute to the cost of upgrading the sewer main according to a written agreement signed by the customer and the city manager. This contribution is in addition to any other fees required by the city as set forth under the existing rate schedule adopted by the city council by resolution, a copy of which is available for public inspection at city hall. (Ord. 585 § 15, 1995)