(A) The city shall inspect the facilities of any user to ascertain whether the purpose of this subchapter is being met and all requirements are being complied with. Persons or occupants of premises where wastewater is created or discharged shall allow the city or its representative ready access at all reasonable times to all parts of the premises for the purposes of inspection, sampling, records examination/copying or in the performance of any of their duties. The city, approval authority and Environmental Protection Agency shall have the right to set up on the user’s property such devices as are necessary to conduct sampling, inspection, compliance monitoring and/or metering operations. Where a user has security measures in force which would require proper identification and clearance before entry into the premises, the user shall make necessary arrangements with its security guards so that, upon presentation of suitable identification, personnel from the city, approval authority and Environmental Protection Agency will be permitted to enter, without delay, for the purposes of performing their specific responsibilities. Sampling of an industrial user’s wastewater shall be required at least semiannually (once every six months). The POTW may choose to monitor in lieu of requiring the industrial user to perform the self-monitoring. If sampling conducted by the industrial user indicates a violation, the user must repeat the sampling and submit analytical results within 30 days after becoming aware of the violation. If the industrial user performed the initial sampling, the user must notify the POTW within 24 hours of becoming aware of the violation in addition to performing the follow-up sampling and analysis. Industrial users that are identified as “significant” are required to report all monitoring results to the POTW.
(B) In cases of violation where the POTW has assumed responsibility for sampling in lieu of the industrial user, the POTW must repeat the sampling and analysis. An exception of that requirement is made if the POTW performs the sampling at the facility at a frequency of at least once a month or if the POTW performs sampling at the industrial user between the time of the initial sampling and the receipt of the results of that sampling.
(C) Grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds. For all other pollutants, 24-hour composite samples must be obtained through flow-proportional composited sampling techniques, unless the POTW authorized time-proportional composite sampling or grab sampling. Where the POTW authorizes time-proportional composite sampling or grab sampling, the samples must be representative of the discharge, and the justification for the decision to allow the alternative sampling must be documented in the IU’s file for that facility or facilities. When grab samples are determined to be applicable for representative sampling under certain circumstances, the POTW shall determine and document the number of grab samples necessary to assess and assure compliance with applicable limits.
(2013 Code, § 28-92) (Ord. 14438, passed 8-23-1993; Ord. 14969, passed 9-25-2017)