A. The reports required by this chapter shall contain the results of sampling. This sampling and analysis may be performed by the director of public works in lieu of the industrial user. Where the director of public works performs the required sampling and analysis in lieu of the industrial user, the user will not be required to submit the compliance certification required under section 8-2-7-6 of this chapter. In addition, where the director of public works itself collects all the information required for the report, including flow data, the industrial user will not be required to submit the report.
B. The reports required by this chapter must be based upon data obtained through appropriate sampling and analysis performed during the period covered by the report, which data are representative of conditions occurring during the reporting period. The director of public works shall require that frequency of monitoring necessary to assess and assure compliance by industrial users with applicable pretreatment standards and requirements. Grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds. For all other pollutants, twenty four (24) hour composite samples must be obtained through flow proportional composite sampling techniques, unless time proportional composite sampling or grab sampling is authorized by the director of public works. Where time proportional composite sampling or grab sampling is authorized by the director of public works, the samples must be representative of the discharge and the decision to allow the alternative sampling must be documented in the industrial user file for that facility or facilities. Using protocols (including appropriate preservation) specified in 40 CFR part 136 and appropriate EPA guidance, multiple grab samples collected during a twenty four (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 director of public works, as appropriate.
C. For sampling required in support of baseline monitoring and ninety (90) day compliance reports required in subsection 8-2-8-1A of this chapter (40 CFR 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 of public works may authorize a lower minimum. For the reports required by subsection 8-2-8-1D and section 8-2-8-2 of this chapter (40 CFR 403.12(e) and 403.12(h)), the director of public works shall require the number of grab samples necessary to assess and assure compliance by industrial users with applicable pretreatment standards and requirements.
D. All analyses shall be performed in accordance with the techniques described in 40 CFR 136 and amendments thereto. Where 40 CFR 136 does not contain sampling or analytical techniques for the pollutant in question, or where the regional administrator determines that the 40 CFR 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analysis shall be performed by using validated analytical methods or any other applicable sampling and analytical procedures suggested by the POTW or other persons, approved by the regional administrator.
E. If the industrial user monitors any regulated pollutant at the appropriate sampling location more frequently than required by the director of public works, using the procedures prescribed in this section, the results of this monitoring shall be included in the report. (Ord. 2014-003, 7-22-2014)