There is levied and assessed upon each lot, parcel of land, building or premises having a connection with the storm water system a wastewater treatment service charge. There shall be established classes of users such that all members of a class discharge approximately the same volume of storm water per residence, facility or other appropriate unit. There shall be assigned to each user's class a number of equivalent residential units (ERUs) for each approximate unit, and this number of ERUs shall represent the ratio of the costs incurred by the storm water flow from the unit to the costs incurred by the storm water flow from the average single-family residence.
(Ord. 1449 § 1 (Exh. A), 2013)