The charges for utility services shall be as set forth in this chapter and shall be adequate, except in cases of emergency, to provide for administration, engineering, legal services, system operations, and maintenance expenses; debt service requirements; funding of reserve accounts; and system improvement projects. The rate structure for establishing the amount of service charges assessed against each parcel of developed real property within the boundaries of the utility shall be based upon the amount of impervious ground cover contained within each parcel except single-family residential. Except for those properties set forth in BIMC 13.24.132, all public entities and public property shall be subject to charges for storm and surface water utility services to the same extent as private persons and property. The rate for services shall be charged whether the premises are occupied or vacant; provided the site contains impervious ground cover. (Ord. 2015-20 § 2, 2015)