13.12.470 – Additional pretreatment measures

At minimum, the Director of Public Works or designee may require the additional pretreatment measures defined below.  The Director of Public Works or designee reserves the right to make unannounced inspections of any additional pretreatment measures during normal business hours whether the User has been issued an individual or general wastewater discharge permit or not.

1. Whenever deemed necessary, the Director of Public Works or designee may require Users to restrict their discharge during peak flow periods, designate that certain wastewater be discharged only into specific sewers, relocate and/or consolidate points of discharge, separate sewage waste streams from industrial waste streams, and such other conditions as may be necessary to protect the POTW and determine the User's compliance with the requirements of this chapter.
2. The Director of Public Works or designee may require any User discharging into the POTW to install and maintain, on the User's property and at the User's expense, a suitable storage and flow-control facility to ensure equalization of flow. The design and installation of the equipment shall be subject to the review and approval of the Director of Public Works or designee and subject to the requirements of all applicable codes, ordinances and laws.  Said facilities shall also be subject to approval by IEPA consistent with IEPA regulations.  A wastewater discharge permit or general permit may be issued solely for flow equalization.  This equipment shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
3. Grease, oil, and sand interceptors for non-food service establishments shall be provided when, in the opinion of the Director of Public Works or designee, they are necessary for the proper handling of wastewater containing excessive amounts of grease and oil, or sand; except that such interceptors shall not be required for residential Users. All interception units shall be of type and capacity approved by the Director of Public Works or designee and shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired regularly, as needed, by the User at the User's expense.
4. Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
5. Laboratory and other facilities that commonly use acid and alkaline chemicals or compounds may be required to install a neutralizing basin.  All basins shall be of the type and capacity approved by the Director of Public Works or designee and shall be located for easy accessibility for cleaning and inspection.