If, in the opinion of the Director of the Wastewater Department or OEPA, excess concentrations of the aforementioned pollutants could cause operation and maintenance problems with the sewerage system, pretreatment shall be required prior to discharge of industrial wastes into the system. The degree of pretreatment shall be specified via a special written permit issued by the Director to the discharger; the permit shall contain pertinent information on the acceptable concentrations of specific pollutants, required remedial action. The manner in which such pretreatment is achieved and the total cost attendant to such activity shall be borne by the industrial discharger.
(a) Water and waste that have not been identified in these Rules and Regulations as being unsuitable for discharge into the City's system may be discharged provided the volume of flow of the acceptable waste materials are not detrimental to the sewerage system. Control of the Director over the discharge of acceptable water and waste materials shall include wastewater having high concentrations of BOD5, suspended solids, ammonia and phosphorus; the admission into the City's system of any water or waste materials having concentrations of any acceptable pollutants over those concentrations normal to domestic wastewater as specified in Section 925.23(a) through (d), shall be subject to review and approval of the Director.
(b) When excessive concentrations of specified pollutants, see Section 925.23, are permitted to be discharged into the public sanitary sewer system, the discharger shall be required to pay a surcharge for the collection and treatment of these excessive materials to off set the added cost to the City of such handling and treatment.
(c) The Director may require the discharger to control the quantities and rates of discharge of water and waste should they constitute a slug flow and, in the opinion of the Director, have a detrimental effect on the sewerage system.
(d) When required by the Director, the owner of any premises served by a sewer service connection carrying high strength wastes, slug flows, industrial wastes or other potentially detrimental water and wastes shall install an approved control manhole in the building sewer to facilitate observation, sampling and flow measurement. The manhole shall be readily accessible and constructed in accordance with the specifications of the City. The manhole shall be installed, maintained or replaced at the owner's expense but shall be under the control of the Director.
(e) All flow measurements, tests and analysis of water and wastes referenced in this section shall be determined by an OEPA approved lab in accordance with Standard Methods and Federal regulation 40 CFR 135 and shall be determined at the control manhole or upon the nearest downstream manhole in the public sanitary sewer system at which the building's service connection is tapped. Sampling methods, times of sampling, duration of sampling and frequency of sampling are to be determined on an individual basis subject to the approval of the Director.
(f) For the purpose of establishing the appropriate surcharge and to ascertain pretreatment compliance, the Director shall have the option of sampling and testing a wastewater and billing the discharger for such sampling and testing; or, the Director may require the discharger to perform a regular sampling and testing program at the discharger's expense. The discharger shall be required to make all data pertaining to such sampling and testing available to the Director or his designee upon request. The Director reserves the right to sample and test the wastewater to verify the accuracy of the discharger's data.
(g) In addition to surcharges and fees for collection and treatment of an industrial wastewater, each discharger shall be charged for the cost of any special sampling or testing performed by the Wastewater Department in accordance with the fee schedule established by the OEPA for specialized testing at an approved lab.
(h) No statement in this section shall be construed as preventing any special agreement or arrangement between the Department and an industrial discharger whereby an industrial waste of unusual strength or character may be accepted by the Director for treatment subject to all rates, surcharges and provisions of these Rules and Regulations.
(i) Any industrial discharger may appeal to the City Manager any determination made by the Director in the implementation and enforcement of the particulars of this section.
(Ord. 90-1343. Passed 11-6-90.)