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If sampling performed by a user indicates a violation, the user must notify the Director within twenty-four (24) hours of becoming aware of the violation. The user shall also repeat the sampling and analysis and submit the results of the repeat analysis to the Director within thirty (30) days after becoming aware of the violation. Re-sampling by the industrial user is not required if the County performs sampling at the user's facility at least once a month, or if the County performs sampling at the user’s facility between the time when the initial sampling was conducted and the time when the user or the County receives the results of this sampling, or if the County performed the sampling and analysis in lieu of the industrial user.
(Ord. 2008-375. Adopted 9-29-08.)
(a) When requested by the Director, a user must submit information on the nature and characteristics of its wastewater within ninety (90) calendar days of the request. The Director is authorized to prepare a form for this purpose and may periodically require users to update this information.
(b) All pollutant analyses, including sampling techniques, to be submitted as part of a wastewater discharge permit application or report shall be performed in accordance with the techniques prescribed in 40 C.F.R. Part 136, as amended, unless otherwise specified in an applicable categorical pretreatment standard. The Director is authorized to require, at his or her discretion, one or all of the approved techniques as set forth above. If Part l36 does not contain sampling or analytical techniques for the pollutant in question, or where the OEPA determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analyses shall be performed by using validated analytical methods or any other applicable sampling and analytical procedures, including procedures suggested by the Director or other parties approved by OEPA.
(Ord. 2008-375. Adopted 9-29-08; Ord. 2012-261. Adopted 6-25-12.)
(a) Each SIU or other discharger designated by the Director shall provide and operate, at the user's expense, a monitoring facility to allow for the inspection, sampling, and flow measurement of each commercial or industrial wastewater discharge. Each monitoring facility shall be situated on the user's premises, except when otherwise approved by the Director. There shall be ample room in or near each monitoring facility to allow sample collection and preparation. The facility and equipment shall be maintained at all times in a safe and proper operating condition at the expense of the user. All monitoring facilities shall be constructed and maintained in accordance with all applicable local construction standards and specifications. Construction shall be completed within ninety (90) days of receipt of written notice from the Director directing the user to construct the facilities unless otherwise specified by the Director.
(b) All users, if directed by the Director, shall have an inspection and sampling manhole with an opening of no less than twenty-four (24) inches in diameter and an internal diameter of no less than forty- eight (48) inches that contains flow measurement, recording and/or sampling equipment as may be required by the County to ensure compliance with this Chapter. The structure may be utilized by the user for the user's monitoring program if approved by the Director. The user shall obtain all required permits prior to construction of a monitoring facility.
(c) SIUs shall be responsible for the collection and testing of self monitoring samples as specified in the user's permit. All tests shall be done in accordance with approved laboratory standards. A copy of the results shall be forwarded directly to the Industrial Pretreatment Section at the Department of Sanitary Sewer Services. Samples shall be representative of the industrial wastewater. Care shall be exercised in the collection of samples to ensure that each sample is preserved in accordance with 40 C.F.R. Section l36.3(e).
(d) The frequency of monitoring by SIUs shall be as specified in the applicable national categorical pretreatment standards or at intervals determined by the Director. If pollutant concentration in the discharge varies significantly, or if the likelihood of a pollutant slug is so great that a “grab” sample of the wastewater is not representative of the wastewater, the County may require the installation of flow-proportional or time-proportional composite samplers.
(Ord. 2008-375. Adopted 9-29-08; Ord. 2015-555. Adopted 12-14-15.)
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.
(a) Except as indicated in subsections (b) and (c) of this Section, 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 Director. Where time proportional composite sampling or grab sampling is authorized by the County, the samples must be representative of the discharge. Using protocols (including appropriate preservation) specified in 40 C.F.R. Part 136 and appropriate OEPA 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 OEPA methodologies may be authorized by the County, as appropriate. In addition, grab samples may be required to show compliance with instantaneous limits.
(b) Samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
(c) For sampling required in support of baseline monitoring and 90 day compliance reports required in Sections 925.24 and 925.26 of this Chapter [40 C.F.R. Sections 403.12(b) and (d)], 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 Director may authorize a lower minimum. For the reports required by paragraphs Section 925.27 of this Chapter [40 C.F.R. Sections 403.12(e) and 403.12(h)], the industrial user is required to collect the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements.
(Ord. 2008-375. Adopted 9-29-08.)
Written reports will be deemed to have been submitted on the date postmarked. For reports which are not mailed, postage prepaid, into a mail facility serviced by the United States Postal Service, the date of receipt of the report shall govern.
(Ord. 2008-375. Adopted 9-29-08.)
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