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(A) Monitoring facilities.
(1) The city shall require monitoring facilities to allow for inspection, sampling, and flow measurement of the building sewer or internal drainage systems. The monitoring facility should normally be situated on the user's premises, but the city may, when such a location would be impractical or cause undue hardship on the user, allow the facility to be constructed in the public street or sidewalk area and located so that it will not be obstructed by landscaping or parked vehicles.
(2) There shall be ample room in or near such sampling manhole or facility to allow accurate sampling and preparation of samples for analysis. The sampling facility and measuring equipment shall be maintained at all times in a safe and proper operating condition at the expense of the user.
(3) Whether constructed on public or private property, the sampling and monitoring facilities shall be provided in accordance with the city's requirements and all applicable local construction standards and specifications. Construction shall be completed within 90 days following written notification by the city.
(B) Sampling requirements.
(1) Samples collected to satisfy reporting requirements must be based on data obtained through appropriate sampling and analysis performed during the period covered by the report, based on data that is representative of conditions occurring during the reporting period.
(2) Except as indicated in division (B)(3) and (B)(4) below, the user must collect wastewater samples using 24-hour flow-proportional composite sampling techniques, unless time-proportional composite sampling or grab sampling is authorized by the POTW. Where time-proportional composite sampling or grab sampling is authorized by the city, the samples must be representative of the discharge. Using protocols (including appropriate preservation) specified in 40 CFR Part 136 and appropriate EPA guidance, multiple grab samples collected during a 24-hour period may be composited prior to the analysis as follows: for cyanide, total phenols, and sulfides the samples may be composited in the laboratory or in the field; for volatile organics and oil and grease, the samples may be composited in the laboratory. Composite samples for other parameters unaffected by the compositing procedures as documented in approved EPA methodologies may be authorized by the city as appropriate. In addition, grab samples may be required to show compliance with instantaneous limits.
(3) Samples for oil and grease, temperatures, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
(4) For sampling required in support of baseline monitoring and 90-day compliance reports, a minimum of 4 grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide and volatile organic compounds for facilities for which historical sampling data do not exist; for facilities for which historical sampling data are available, the POTW may authorize a lower minimum. For the reports required by § 54.51, the user is required to collect the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements.
(5) For periodic compliance reports, the sample type and duration shall be specified in the user's waste discharge permit.
(6) If a violation is detected through sampling and analysis conducted by the POTW in lieu of the industrial user, the control authority shall perform the repeat sampling and analysis within 30 days of becoming aware of the violation unless it notifies the user of the violation and requires the user to perform the repeat sampling and analysis.
(1974 Code, § 54.52) (Ord. 29-84, passed 9-4-1984; Am. Ord. 26-87, passed 7-6-1987; Am. Ord. 9-91, passed 3-4-1991; Am. Ord. 14-09, passed 6-1-2009) Penalty, see § 54.99