(A) Categorical users and significant industrial users discharging process wastewater to the POTW (excluding sanitary, noncontact cooling, and boiler blowdown wastewater) shall furnish, install, and properly maintain an open channel wastewater flow measurement system. Users that have unmetered sources of water supply, excessive non-sewered losses, or highly fluctuating wastewater discharge may also be required to install flow measurement (FM) systems. The FM system shall be capable of supplying a flow proportioned signal as required by the City and may include automatic flow proportional sampling equipment and automatic wastewater analysis and data recording equipment. The FM shall be used to evaluate the quantity and quality of industrial wastewater discharge to the public sewer.
(B) Categorical users and significant industrial users required to install a FM system shall propose a suitable location and design for the FM system. Upon approval of the FM system by the City, the user shall perform wastewater monitoring at this facility and shall agree to allow the use of this system for industrial wastewater monitoring by the City. The FM system shall be located so as to be safe and accessible to City employees, and shall be constructed in accordance with the City’s requirements, and all applicable City building codes. Plans for all FM systems determined by the control authority to require engineering design shall be prepared and signed by a registered civil, chemical, or mechanical engineer.
(C) The user’s FM system shall be subject to inspection by the City at any time. FM systems shall be properly operated, kept clean, and maintained in good working order at all times by the user.
(D) If the control authority requires or the owner chooses to install a flow meter (FM), the FM system must be hydraulically calibrated once every two years and a photocopy of the calibration must be sent to the control authority. Flow charts are to be held by the user for a minimum of three years and made available to the City upon request. Totalizer readings shall be recorded daily and twice a year. A report shall be submitted to the control authority showing total daily flows and total monthly flow.
(Prior Code, § 12-8-4) (Ord. 13-05, passed 3-25-2013)