In order that the rates and charges may reflect the costs of providing service rendered to users, the city shall base its charges not only on the volume, but also the 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 sewage system, in such manner and by such method as the city may deem practicable 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 biochemical oxygen demand of * milligrams per liter of fluid, suspended solids in excess of * milligrams per liter of fluid; phosphorus in excess of * milligrams per liter of fluid; or ammonia nitrogen in excess of * milligrams per liter of fluid. Additional charges for treating stronger than normal domestic waste shall equal the excessive strength surcharges set by the South Dearborn County Regional Sewer District.
*The same levels as used for billing surcharges by South Dearborn Regional Sewer District.
(B) The determination of suspended solids, five-day Biochemical Oxygen Demand, Ammonia Nitrogen and Phosphorous contained in the waste shall be in accordance with the latest copy of "Standard Methods for the Examination of Water, Sewage and Industrial Wastes," as written by the American Public Health Association, the American Water Works Association and the Water Pollution Control Federation, and in conformance with "Guidelines Establishing Test Procedures for Analysis of Pollutants," Regulation CFR Part 136, published in the Federal Register on October 16, 1973.
(`94 Code, § 53.04) (Ord. 5-1994, passed 6-6-94)