|(a) Required samples and measurements shall be taken
of the effluent from the sampling point described in the permit. Should
the permit not specify a sampling point, samples shall be collected
immediately following the last treatment unit. These procedures shall
be followed unless an alternative sampling and/or measuring point
is approved in advance in writing by the executive director.
(b) Samples shall be taken and measurements shall be
made at the minimum frequencies specified in the permit for each parameter.
If a permit does not specify a sampling frequency, the permittee shall
follow the frequencies set forth in §319.9 of this title (relating
to Self-Monitoring Frequency). If a parameter included in a permit
is not listed in the applicable table, the permittee will be instructed
by the executive director in writing as to what frequency of analysis
shall be followed.
(c) The permit may specify different sampling and/or
measurement frequencies than specified in §319.9 of this title
on a case-by-case basis, and in such cases the permit controls.
(d) For land application or evaporation facilities,
the monitoring requirements shall be specified in the permit. The
permittee shall monitor flow to a land application site on a daily
basis and an evaporation system on a weekly basis when utilized. The
specific plot or site used for land application shall be specified
in the permit by name or description.
(e) The monitoring requirements set out in this subchapter
are minimum requirements unless the permit specifies a lesser frequency.
The executive director may establish a more frequent measurement schedule,
if necessary, to protect human health or the environment. Additional
measurements, samples, analyses, and recordation are encouraged in
order to facilitate more effective management and control of facility
operations. If the permittee monitors any pollutant at the sampling
point described in the permit more frequently than required by this
subchapter or the permit using approved analytical methods as specified
in §319.11 of this title (relating to Sampling and Laboratory
Testing Methods), the results of such monitoring shall be included
in the calculation and reporting of the value submitted on the required
discharge monitoring report or monthly effluent report. Increased
frequency of sampling shall be indicated on the report.
(f) Calculations for all limitations which require
averaging of measurements shall utilize an arithmetic mean unless
otherwise specified in the permit.
|Source Note: The provisions of this §319.5 adopted to be effective July 27, 1988, 13 TexReg 3514; amended to be effective October 8, 1990, 15 TexReg 5501; amended to be effective November 12, 2020, 45 TexReg 8000