In order that the rates and charges may be justly and equitably adjusted to the service rendered to users, the City shall base its charges not only on the volume, but also on strength and character of the stronger-than-normal domestic sewage and wastes which it is required to treat and dispose of. The City shall require the user to determine the strength and content of all sewage and wastes discharged, either directly or indirectly into the sanitary sewer system, in such manner and by such method as the City may deem practicable in the light of the conditions and attending circumstances of the case, in order to determine the proper charge. The user shall furnish a central sampling point available to the City at all times.
(a) Normal sewage domestic waste strength should not exceed a carbonaceous biochemical oxygen demand (CBOD) of 200 milligrams per liter of fluid or suspended solids in excess of 300 milligrams per liter fluid. Additional charges for treating stronger-than-normal domestic waste shall be made on the following basis:
(1) Rate surcharge based upon CBOD. There shall be an additional charge of thirty dollars and forty-four cents ($30.44) per 100 pounds of carbonaceous biochemical demand for CBOD received in excess of 200 milligrams per liter of fluid. The rate shall increase to thirty-three dollars and forty-eight cents ($33.48) per 100 pounds on January 1, 2023.
(2) Rate surcharge based upon suspended solids. There shall be an additional charge of eighteen dollars and fifty-five cents ($18.55) per 100 pounds of suspended solids for suspended solids received in excess of 300 milligrams per liter of fluid. The rate shall increase to twenty dollars and forty-one cents ($20.41) per 100 pounds on January 1, 2023.
(Ord. 30-22. Passed 10-24-22.)
(b) The determination of suspended solids and five-day biochemical oxygen demand contained in the waste shall be in accordance with the latest copy of "Standard Methods for the Examination of Water and Wastewater", as written by the American Public Health Association, the American Water Works Association and the Water Pollution Control Federation, and in conformance with "Methods for Chemical Analysis of Water and Wastes", U.S. EPA-600/4-79-020.
(Ord. 6-86. Passed 2-10-86.)