§ 13-4. Exceptions.

(a) Discharges not into sanitary facilities.

Whenever any property upon which the charge imposed hereunder uses water from the City's water supply system or any other source or sources in such a manner that the water so used is not discharged into the sanitary facilities of the City, the quantity of water so used and not discharged into the City's sanitary facilities shall be excluded in determining the charge imposed hereunder as to said property if the quantity of water so used and not discharged into the City's sanitary facilities is measured by a device or devices approved by the Director of Public Works and installed without cost to the City.

(b) Discharge to storm drains.

Whenever any property upon which the charge imposed hereunder uses water from the City's water supply system or from any other source or sources for an industrial or commercial purpose in such a manner that the water so used is discharged into the storm drain facilities of the City, the quantity of water so used and discharged into the City's stone drain system shall be excluded in determining the charge imposed hereunder as to said property if the quantity of water so used and discharged into the City's storm drain system is measured by a device or devices approved by the Director of Public Works and installed without cost to the City and the owner of said property first obtains a storm drain discharge permit and complies with all federal, state and local rules and regulations covering the discharge of wastewaters to surface waters.

(1) In any case where it is determined by the Director of Public Works that it is not practical to install a measuring device in connection with an industrial or commercial operation to determine continuously the quantity of water not discharged into the City's sanitary facilities, the Director of Public Works:

(i) shall determine periodically in such reasonable manner and by such reasonable method as he may adopt, the quantity of water which is not discharged into the City's sanitary facilities; and

(ii) in connection therewith, shall take into consideration:

(A) the total amount of water from all sources used on the property;

(B) the nature, kind, and type of industrial or commercial business being operated on said property; and

(2) The quantity of water which is not discharged into the City's sanitary facilities as determined by the Director of Public Works as aforesaid shall be excluded in determining the charge imposed hereunder.