(A) Surveillance of industrial users.
(1) City monitoring.
(a) The Director shall perform a minimum of 2 unscheduled monitoring events each calendar year at each SIU.
(b) The Director may perform demand monitoring at an industrial user when warranted in the opinion of the Director in response to a known or suspected violation discovered in a self-monitoring report, routine sampling trip or by public complaint. Demand monitoring may consist of site inspection, records review and sampling as determined by the Director.
(c) The Director may monitor and analyze the wastewater of any SIU on a daily basis when just cause exists.
(2) Self-monitoring.
(a) An SIU shall perform self-monitoring as established by all of the following:
1. As required by the National Categorical Pretreatment Standards;
2. As established in an SIU's industrial wastewater discharge permit; and
3. More frequently if required by the Director, based upon the potential degree of adverse impact to the POTW, variability in types or amounts of pollutants discharged, concentration or loading of compatible pollutants, or to ascertain continued compliance.
(b) Upon request, the Director may allow an SIU to use 1 of the city's monitoring events in lieu of 1 of the required SIU self-monitoring events. This is limited to once per calendar year.
(c) Each SIU shall measure and record the following data in accordance with the schedule established in the SIU's permit and the sampling and analytical requirements in § 52.44:
1. Total daily wastewater discharge (gallons per day);
2. Concentration of each wastewater constituent or characteristic specified in the permit; and
3. Total daily discharge (loading) of each wastewater constituent or characteristic specified in the permit.
(d) If at any time the rate of wastewater discharge, or concentration or mass of a wastewater constituent or characteristic, exceeds the maximum limits in the permit, the Director shall be notified as required in § 52.32.
(3) Monitoring equipment.
(a) All metering or monitoring equipment installed by the SIU shall be installed, maintained and calibrated in accordance with the manufacturers' recommended standards for the specific equipment.
(b) The Director may install additional metering or monitoring equipment during a surveillance period in or near the SIU's monitoring facility.
(c) In the event of continuing exceedance of an SIU's effluent limitations or frequent fluctuations in an SIU's wastewater constituents and characteristics, the Director may require an SIU to install additional monitoring equipment which may include, but not be limited to, a device for continuously and automatically measuring and recording flow and/or a device for automatically taking discrete and composite samples of aastewater.
(B) Surveillance charge. The Director shall have the authority to charge any user a surveillance charge. The surveillance charge may be based on, but not limited to, the cost of sample collection, analysis and reporting as well as site inspection and records evaluation costs. Surveillance charges are listed in §§ 52.50 through 52.58.
(Ord. 5746, passed 7-1-2019)