The sampling, analysis, and flow measurement procedures, equipment, and results must
be subject at any time to inspection by the Director. Sampling and flow measurement
facilities must provide safe access to authorized personnel.
Those users required by the Director to make periodic measurements of industrial wastewater
flows and pollutants must make at least the minimum number of measurements required.
The minimum requirement for periodic measurements shall be at least two 24-hour measurements
per year. All wastewater samples must be representative of the user's discharge. Wastewater
monitoring and flow measurement facilities shall be properly operated, kept clean,
and maintained in good working order at all times. The failure of a user to keep its
monitoring facility in good working order shall not be grounds for the user to claim
that sample results are unrepresentative of its discharge. Representative samples
of the industrial wastewater shall be obtained at least once each hour over the 24-hour
period, or the designated hours of operation for the facility. All samples must be
properly refrigerated and preserved, composited according to measured flow rates during
the 24-hour period, and analyzed for the specified wastewater pollutants. Industrial
plants with large fluctuations in quantity or quality of wastewater may be required
to provide continuous sampling and analyses for every working day. When required by
the Director, users must install and maintain, in proper working order, automatic
flow-proportional sampling equipment, automatic analysis and recording equipment,
or both.
Measurements to verify the quantities of waste flows and waste pollutants reported
by users will be conducted on a random basis by the Director.
(§ 1, Ord. 1170, eff. April 21, 2011)
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