15.40.430   Sampling, analysis and test procedures.
   1.   All analysis and testing by the city or users required by this chapter shall conform to procedures established by the Administrator pursuant to section 304(g) of the Act and contained in 40 CFR Part 136 and amendments thereto or with any other test procedures approved by the Administrator. Sampling shall be performed in accordance with the techniques approved by the Administrator. Where 40 CFR Part 136 does not include a sampling or analytical technique for the pollutant in question, sampling and analysis shall be performed using validated analytical methods or any other applicable sampling and analysis procedures, including procedures suggested by the director or other parties approved by USEPA.
   2.   If sampling 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 must also resample and submit results of this resampling to the director within thirty (30) days.
   3.   Except as indicated in subsection (4) below, the user shall collect wastewater samples using twenty-four- (24-) hour flow-proportional composite collection techniques, unless time-proportional composite sampling or grab sampling is authorized by the director. Where time-proportional or grab sampling is authorized by the director, the samples must be representative of the discharge. Using protocols (including appropriate sample preservation) specified in 40 CFR Part 136 and appropriate USEPA 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 USEPA methodologies may be authorized by the city, as appropriate. In addition, grab samples may be required to show compliance with instantaneous limits.
   4.   Samples for oil and grease, temperature, pH, cyanide, phenols, sulfides, and volatile organic compounds must be obtained using grab sample collection techniques.
   5.   In all cases where this chapter requires either sampling, analysis or testing of wastewater by a user, all such sampling, analysis and testing shall be performed at the user’s expense by an accredited independent laboratory approved by the director. Nothing in this subsection shall be construed to prevent a user from performing its own sampling, analysis and testing in those circumstances where such is not required to be performed by this chapter.
(Ord. 2481 §1 (part))