(A) All significant industrial users shall, at a frequency determined by the City Manager but in no case less than twice per year (in June and December), submit a report indicating the nature and concentration of pollutants in the discharge which are limited by pretreatment standards and the measured or estimated average and maximum daily flows for the reporting period. All periodic compliance reports must be signed and certified in accordance with § 52.054 of this ordinance.
(B) All wastewater samples must be representative of the user’s discharge. Wastewater monitoring and flow measurement facilities shall be properly operated, kept clean, and maintained in good working order at all times. The failure of a user to keep its monitoring facility in good working order shall not be grounds for the user to claim that sample results are unrepresentative of its discharge.
(C) If a user, subject to the reporting requirement in this section monitors any pollutant more frequently than required by the City Manager, using the procedures prescribed in § 52.100 of this ordinance, the results of this monitoring shall be included in the report.
(D) Monitoring shall be as follows:
(1) Significant Industrial Users shall provide and operate at the Significant Industrial User’s own expense, monitoring facilities to allow inspection, sampling and flow measurement of the building sewer or internal drainage systems. The monitoring facility will normally be situated on the user’s premises but the POTW may, when such a location would be impractical and cause undue hardship to the user, allow the facility to be constructed in the public street or sidewalk area land located so that it will not be obstructed by landscaping, parked vehicles, or other activities of the user.
(2) Where required by the POTW, additional control manholes or sampling chambers shall be provided at the end of each industrial process within an industrial user’s facility suitable for the determination of compliance with Pretreatment Standards.
(3) Whenever required by a wastewater discharge permit, any Significant Industrial User shall install a large manhole or sampling chamber for each separate discharge in the building sewer in accordance with plans and specifications approved by the POTW, installed and maintained at all times at the user’s expense, which shall have ample room in each sampling chamber to permit the POTW to take accurate composite samples for analysis. The chamber shall be safely, easily and independently accessible to authorized representatives of the POTW at any time.
(a) Each sampling chamber shall contain a Palmer Bowlus flume unless a weir or similar device is approved by the POTW with a recording and totalizing register for measurement of the liquid quantity; or at the discretion of the POTW the metered water supply to the industrial plant may be used as the liquid quantity where it is substantiated to the POTW that the metered water supply and waste quantities are approximately the same, or where a measurable adjustment agreed to by the POTW is made in the metered water supply to determine the liquid waste quantity.
(b) When required, samples shall be taken every hour or half hour, as determined by the POTW and properly refrigerated and preserved in accordance with 40 C.F.R. Part 136 and shall be composited in proportion to the flow for a representative 24 hour sample. Such sampling shall be done as prescribed by the user’s wastewater discharge permit.
(c) The sampling chamber, metering device, and documentation of the frequency of sampling, sampling methods and analyses of samples shall be subject, at any reasonable time, to inspection and verification by the POTW.
(4) Whenever required by a wastewater discharge permit, the permittee shall pay the costs of sampling of its discharge and the costs of analyses of its samples, whether or not the sampling and analyses are done by the permittee or by the POTW.
(5) All measurements, tests, and analyses to which reference is made in this ordinance shall be determined and performed in accordance with the procedures established by the Administrator of the United States Environmental Protection Agency (hereafter “Administrator”) pursuant to § 304(g) of the Act, being 33 U.S.C. § 1314(g), and contained in 40 C.F.R. Part 136 and amendments thereto or with any other test procedures approved by the Administrator. Sampling shall be performed in accordance with the techniques approved by the Administrator. Where 40 C.R.F. Part 136 does not include sampling or analytical techniques for the pollutants in question, or where the Administrator determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analyses shall be performed using validated analytical methods or any other sampling and analytical procedures, including procedures suggested by the POTW or other parties, approved by the Administrator.
(Prior Code, Art. 16B, § 6.4)