(A)   The sewer service charges established in this subchapter shall not prevent the assessment of additional charges to users who discharge wastes with concentrations greater than normal domestic strength or wastes of unusual character, or contractual agreements with the users, as long as the following conditions are met:
      (1)   The user pays operation, maintenance and replacements costs in proportion to the user’s proportionate contribution of wastewater flows and loadings to the treatment plant, and no user is charged at a rate less than that of normal domestic strength wastewater; and
      (2)   The measurements of wastes are conducted according to the latest edition of Standard Methods for the Examination of Water and Wastewater in a manner acceptable to the city as provided for in this chapter.
   (B)   A study of unit costs of collection and treatment processes attributable to flow, BOD, TSS and other significant loadings shall be developed for determining the proportionate allocation of costs to flows and loadings for users discharging wastes of greater than normal domestic strength or wastes of unusual character.
(Ord. 407, passed 12-26-1989)