(a) The Director may inspect the monitoring facilities of any discharger to determine compliance with the requirements of this chapter. The discharger shall allow the Director or its representatives, upon presentation of credentials of identification, to enter upon the premises of the discharger at all reasonable hours, for the purposes of inspection, sampling, or records examination. The Director shall have the right to set up on the discharger's property such devices as are necessary to conduct sampling, inspection, compliance monitoring, or metering operations.
(b) 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.
(1) Except as indicated in subsection (b)(2) and (3) below, the discharger must collect wastewater samples using 24 hour flow-proportional composite sampling techniques, unless time proportional composite sampling or grab sampling is authorized by the authority. Where time-proportional composite sampling or grab sampling is authorized by the Director, 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 authority, as appropriate. In addition, grab samples may be required to show compliance with Instantaneous Limits.
(2) Samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
(3) For sampling required in support of Section 933.12 (a) and (b), a minimum of four (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 authority may authorize a lower minimum. For the reports required by Section 933.12 (c), the discharger is required to collect the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements.
(c) If a violation is detected through sampling and analysis conducted by the authority in lieu of the industrial discharger, the authority shall perform the repeat sampling and analysis within thirty days of becoming aware of the violation unless it notifies the discharger of the violation and requires the discharger to perform the repeat sampling and analysis.
(Ord. 4-2012. Passed 2-6-12.)