(A) Authority. The Sewer Department shall have the authority to make whatever tests are necessary to carry out a planned sampling program and to make whatever analyses are needed for all commercial and industrial users. The B.O.D. test shall be considered the standard test; however, C.O.D. (“Chemical Oxygen Demand” means quantity of oxygen consumed from a chemical oxidation of inorganic and organic matter present in the water or wastewater, expressed in mg/l) or T.O.C. (“Total Organic Carbon” means the total of all organic compounds expressed in milligrams per liter as determined by the combustion-infrared method prescribed by approved laboratory procedure) tests may be substituted in cases where it has been determined by the Sewer Department that the B.O.D. test is not representative of actual wastewater loading. Wastewater characteristics shall be determined by the Department on the basis of monitored wastewater discharged, a certified statement from the user, or on the best available data as to the characteristics of the discharges.
(B) Variation of more than 2%. Any change in the ongoing process(es) employed by a user contributing industrial wastewater which results in a variation of more than 25% in one or more of the effluent loading concentrations shall be reported to the Department within 30 days of the change.
(C) Sewer charge adjustment. If it is determined through testing that a significant variation exists between the user’s certified data and the discharge characteristics monitored by the Department, the city may adjust the sewer use charge based on the monitored data from the original date of certification, unless written communication has occurred notifying the Department of changes in loading and giving specific dates of changes.
(D) Designated discharge. Where sampling and gauging of a specific user is not practical for physical, economic, safety or other reasons, the Sewer Department may designate values for concentrations of the wastes discharged into the sewage system for all users in the same standard industrial classification.
(Prior Code, § 16-6-3)