Significant users required by the Director of Public Works to make periodic measurements of industrial wastewater flows and constituents shall annually make the minimum number of such measurements as required in the wastewater discharge permit. When required by the Director, users shall install and maintain in proper order automatic flow-proportional sampling equipment and/or automatic analysis and recording equipment. City Code, 1976/83, art. 25, §7(b)(5) Ord. 84-129 Ord. 91-775