Minimum standards for the design and construction of sewers within the city or subject to the jurisdiction of the city shall be the "Sanitary and Storm Sewer Specifications" of the city. The city engineer may permit modifications of those specifications or may require higher standards where unusual conditions are encountered. "As-built" drawings showing the actual location of all sewers, structures, wyes, and laterals shall be filed with the city before final acceptance of the work. (Ord. 2006-02 (part), 2006: Prior code § 4233)