A. Industrial users may be required at their own expense, to install, calibrate, operate and maintain sampling or monitoring equipment necessary to determine compliance with this chapter or requirements that may be specified as a condition of the industrial waste permit or to determine wastewater flows and characteristics as required to determine sewer use charges.

B. Industrial users subject to categorical pretreatment standards shall be required, and all other industrial users may be required, to take samples of effluents in accordance with specified methods at the locations, at the intervals and in such a manner as may be prescribed by the Director, which are necessary to determine compliance with categorical pretreatment standards and other requirements contained in the industrial waste permit.

C. Categorical industrial users stall be required to keep records as described in 40 C.F.R. pt. 403.12(o) and amendments thereto. All other industrial users may be required to keep records designated by the Director.

D. Industrial users subject to categorical pretreatment standards shall be required submit to the Director the reports described in 40 C.F.R. pt. 403.12. Industrial users subject to categorical pretreatment standards shall also comply with any additional requirements specified in an applicable categorical pretreatment standard or elsewhere in 40 C.F.R. pt. 403.12, and amendments thereto. The Director may prescribe reporting requirements for all other industrial users as he or she determines to be necessary for the enforcement of this chapter.

E. Industrial users shall notify the Director or designee immediately of any slug loading.

F. If not already required by this section, the Director or designee may require any industrial user to install, at the owner’s expense, a suitable device for continuously recording the flow discharged to the city’s wastewater facilities. The measuring device may be installed on the source of the water to the industrial plant if that quantity is to be used as the measurement for the wastewater produced. If sufficient evidence is presented to the Director that not all water used reaches the sewer, an estimate will be made by the Director of the proper amount to be deducted to compute the wastewater flow.

G. The Director may require an industrial user to install at its own expense a suitable control manhole to facilitate observation and sampling of industrial waste. The manhole and any monitoring or measuring devices required under subsections A. or F. of this section shall be accessible and safely located and shall be constructed in accordance with plans approved by the Director. They shall be of such design and construction as to prevent infiltration by ground and surface waters, or introduction of slugs or solids to the wastewater facilities. The installation of screens with a maximum opening of 1 inch, but of sufficient fineness to prevent the entrance of objectionable slugs or solids, may be required. The facilities shall be so maintained by the person discharging industrial waste that the Director may readily and safely measure the flow rate or obtain samples of the flow at all times.