All pollutant sampling and analysis required by this chapter shall be performed in accordance with the techniques prescribed in 40 CFR Part 136, unless otherwise specified in an applicable categorical pretreatment standard. If 40 CFR Part 136 does not contain sampling or analytical techniques for a pollutant subject to sampling under this chapter, sampling and analysis shall be performed in accordance with procedures approved by the control authority. Unless specified below or otherwise specified by the control authority, data submitted to the control authority shall be analyzed by a laboratory registered or accredited under the provisions of Chapter 173-50 WAC. This requirement shall not apply to the following data submitted to the control authority: flow; temperature; settleable solids; conductivity; pH; turbidity; and internal process control parameters used solely for internal process control.
(Ord. 1685 § 3 (Exh. A), 2022)
(a) 
Industrial users shall certify that all samples required to be collected under this chapter are representative of normal work cycles and the expected pollutant discharges from the industrial user's facility occurring during the reporting period. Industrial users shall also ensure that samples are collected during the period(s) specified in their industrial wastewater discharge permit, or as otherwise required by the control authority. In addition, industrial users shall comply with the following sampling protocols:
(1) 
Use proper sample containers appropriate for sample analysis and sample collection and preservation as specified by the protocols in 40 CFR Part 136;
(2) 
Obtain samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds using grab sample techniques;
(3) 
For certain pollutants identified in an industrial user's industrial wastewater discharge permit, an industrial user may composite multiple grab samples taken over a 24-hour period, unless a different time period is specified by the control authority. Industrial users may composite grab samples for cyanide, total phenols, and sulfides either in the laboratory or in the field, and may composite grab samples for volatile organics and oil and grease in the laboratory prior to analysis;
(4) 
For all other pollutants, industrial users shall employ 24-hour flow-proportional composite samplers unless the control authority authorizes or requires an alternative sample collection method. Time-proportional sampling may be approved or used by the control authority where time-proportional samples are believed representative of the discharge;
(5) 
The control authority may authorize composite samples for parameters unaffected by the compositing procedures, as appropriate;
(6) 
The control authority may require grab samples either in lieu of or in addition to composite sampling to show compliance with instantaneous discharge limits;
(7) 
Industrial users conducting sampling activities to complete baseline monitoring and 90-day compliance reports required by FMC § 20.30.600 and § 20.30.620 shall collect at least four grab samples for pH, cyanide, total phenols, oil and grease, sulfide and volatile organic compounds. Industrial users may composite samples prior to analysis if allowed under subsection (a)(3) of this section. When historical sampling data exists, the control authority may authorize fewer samples if it determines that use of such samples will satisfy the requirements of this section;
(8) 
For industrial users conducting sampling to complete periodic self-monitoring reports under FMC § 20.30.630, the control authority may specify the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements; and
(9) 
Industrial users shall properly operate, clean, and maintain sampling and flow metering facilities and devices and ensure they function properly.
(Ord. 1685 § 3 (Exh. A), 2022)
In addition to any recordkeeping requirements set forth in an industrial user's industrial wastewater discharge permit or other control mechanism, all industrial users subject to the reporting requirements of this chapter shall retain and make available for inspection and copying by the control authority at its facility all records the industrial user generates when conducting monitoring activities required by this chapter. Such industrial users shall also retain records associated with best management practices when such practices are required by the control authority. Monitoring records shall include chain-of-custody information including, at a minimum, the date, time, place, and method of sampling, and the name of the person(s) conducting the sampling; the quality control and quality assurance procedures used and the name of the person(s) with control of the sample prior to analysis; the place and date where the sampling analysis was completed, the analytical technique(s) used, and the name of the person conducting the analysis; and the results of the sampling analysis. Industrial users shall retain the records described in this section at its permitted facility for inspection and copying by the control authority for three years, unless a longer retention period is specified in writing by the control authority. The industrial user's obligation to maintain records under this section shall be automatically extended for the duration of any administrative enforcement or litigation action brought by the control authority against the industrial user.
(Ord. 1685 § 3 (Exh. A), 2022)