Charges for waste treatment pursuant to Section 926.17 shall apply to wastes not exceeding normal concentrations as follows:
(a) For discharge to conventional gravity sanitary sewers:
(1) BOD - 210 milligrams per liter;
(2) Suspended Solids - 214 milligrams per liter;
(b) Applicable concentrations shall be based upon average concentrations, weighted in proportion to volume of flow and determined during each billing period by the most practical method possible. Should the average concentration discharged to a Conventional Gravity Sanitary Sewer of any constituent exceed the normal concentration provided in subsection (a) hereof, a surcharge for each constituent so exceeded shall apply for the applicable billing period, in accordance with the provisions of Section 926.18.
(Ord. 5-1991. Passed 1-17-91.)