(A) Periodic measurements of flow rates, flow volumes, BOD and suspended solids for use in determining the monthly industrial wastewater treatment service charge and such measurements of other constituents believed necessary by the Director of Public Works shall be made by all industrial users, unless specifically relieved of such obligation by the Director of Public Works.
(B) All such sampling, analyses and flow measurements of industrial wastewaters shall be performed by a state certified independent laboratory, by a laboratory of an industrial user approved by the Director of Public Works or by personnel of the city. Prior to submittal to the city of data developed in the laboratory of an industrial user, the results shall be verified by a responsible administrative official of the industrial user under the penalty of perjury.
(C) All wastewater analyses shall be conducted in accordance with the appropriate procedure contained in the federal guidelines establishing test procedures for the analysis of pollutants, 40 C.F.R. part 136, test procedures. If no appropriate procedure is contained therein, a procedure judged satisfactory by the Director of Public Works shall be used to measure indicated wastewater constituents. Any independent laboratory or industrial user performing tests shall furnish test data or information on the test methods or equipment used, if requested to do so by the Director of Public Works.
(D) All users making periodic measurements shall furnish and install at the control manhole or other appropriate location a calibrated flume, weir, flow meter or similar device approved by the Director of Public Works and suitable to measure the industrial wastewater flow rate and total volume. A flow indicating, recording and totalizing register may be required by the Director of Public Works. In lieu of wastewater flow measurement, the Director of Public Works may accept records of water usage and adjust the flow volumes by suitable factors to determine peak and average flow rates for the specific industrial wastewater discharge.
(E) The minimum requirement for self-monitoring shall be at least two times per year for significant industrial users, whether or not they are subject to national categorical standards.
(F) Industrial users with large fluctuations in quantity or quality of wastewater may be required to provide continuous sampling and analyses for every day of operation. When required by the Director of Public Works, users shall install and maintain automatic flow proportional sampling equipment and/or automatic analysis and recording equipment, approved by the Director of Public Works.
(G) Each industrial user, including those subject to self-monitoring and reporting requirements, shall retain for a minimum of three years records of monitoring activities and results and shall make such records available upon request for inspection and copying by inspectors and other authorized personnel of the city. Such records shall be retained during the pendency of any litigation regarding industrial wastewater discharge or for such additional periods as may be requested by city, state or federal entities.
(H) Analyses of industrial wastewater as required for the enforcement of the provisions of this chapter and the determination of industrial user charges will be conducted at the discretion of the Director of Public Works by either the POTW laboratory or another laboratory approved by the Director of Public Works. The laboratory performing the analyses shall be certified by the state for the analyses performed.
1. The costs of sampling and analyses performed by the POTW laboratory shall be paid by the industrial user when, in the opinion of the Director of Public Works, because of the quantity or quality of the wastes discharged, a greater number of analyses than normal are required to ensure compliance with this chapter. The costs for sampling and analyses performed by another laboratory shall be paid by the industrial user.
2. Notwithstanding subsection (H)1. of this section, costs for sampling and analyses performed in the normal course of monitoring an industrial user, by the POTW laboratory shall be included as part of the sewer service rates established in the resolution of the City Council.
3. Charges for analyses completed by the POTW laboratory shall be commensurate with the rates charged by private laboratories for similar analyses.
(Ord. 497, passed 6-20-2000)