In areas designated as “combined sewer areas” on the Metropolitan Water Reclamation District Maps, the following requirements shall apply:
(A) Separation. Complete separation of sewers shall be provided within the property lines. All subsurface soil drainage shall not be connected to sanitary waste lines.
(B) Detention. Detention shall be provided and/or permanent constrictions shall be built on the storm sewer system to control the flow into the existing combined system in accordance with the requirements of the city.
(C) Downspouts. All residential downspouts or roof drains shall be discharged at grade within the yard of the dwelling whenever possible. No downspout or roof drain shall be connected to a sanitary sewer. Whenever possible, residential downspouts shall be removed from sewers when residential buildings are constructed or when residential gutters are replaced.
(D) Footing drains. Footing drains shall be connected to sump pumps, and discharged at grade within the yard of the dwelling whenever possible. All new construction after the effective date of this section shall conform to the requirements of this section.
(E) Floor drains. Floor drains in basements shall be connected to sump pumps and discharged to sanitary or combined sewers.
(F) Sump pumps. Sump pumps installed to receive and discharge ground waters or other storm waters shall be discharged at grade within the yard of the dwelling whenever possible. Sump pumps installed to receive and discharge floor drain flow or other sanitary sewage shall be connected to sanitary or combined sewers. A sump pump shall be used for one of two functions only, either the discharge of storm waters or the discharge of sanitary sewage.
(Ord. 93-40, passed 7-27-1993; Ord. 15-40, passed 11-10-2015)