Pretreatment of industrial wastewater

(a) The director may require an industrial wastewater pretreatment system or device to treat industrial wastewater, in complying with pretreatment requirements, before discharge into the sewerage system. This may be necessary to restrict or prevent the discharge of certain wastewater constituents, to distribute more equally over a longer time period of any peak discharges, or to achieve any pretreatment result required by the director. (b) All pretreatment systems or devices shall be approved by the director but such approval shall not absolve the industrial user of the responsibility of meeting any industrial effluent limitation required by the department. (c) The city shall annually publish in the largest daily newspaper a list of industrial users who were in significant noncompliance with applicable pretreatment requirements as defined in § 43-1.2 during the previous 12 months. (d) Slug control plan. Significant industrial users are required to notify the POTW immediately of any changes at their facilities affecting potential for a slug discharge. If the POTW decides that a slug control plan is needed, the plan shall contain, at a minimum, the following elements: (1) A description of discharge practices, including non-routine batch discharges; (2) A description of stored chemicals; (3) Procedures for immediately notifying the POTW of slug discharges, including any discharge that would violate a prohibition under 40 CFR § 403.5(b) with procedures for follow-up written notification within five days; and (4) If necessary, procedures to prevent any adverse impact from accidental spills, including inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site run-off, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants (including solvents), and measures and equipment for emergency response. (e) Dilution is prohibited as a substitute for pretreatment as stated in § 43-1.8 (l). (f) If hazardous waste is discharged into the sewer system, the industrial user shall notify, in writing, the director, DOH, and EPA. Notification shall include but is not limited to the name of the hazardous waste, as set forth in 40 CFR Part 261; EPA hazardous waste number; and the type of discharge (continuous, batch, or other). ; Sec. 14-5.6, R.O. 1990)