| (e) Reporting requirements for TOC. Systems treating
surface water or groundwater under the direct influence of surface
water shall properly complete and submit periodic reports to demonstrate
compliance with this section.
(1) The reports must be submitted to the Water Supply
Division, MC 155, Texas Commission on Environmental Quality, P.O.
Box 13087, Austin, Texas 78711-3087 by the tenth day of the month
following the end of the reporting period.
(2) Public water systems must submit a Monthly Operational
Report for Total Organic Carbon (commission Form 0879) each month.
(3) A system that does not meet the Step 1 removal
requirements must submit a Request for Alternate TOC Requirements
at least 15 days before the end of the quarter.
(A) If the system meets alternative compliance criterion
Number 3, subsection (b)(2)(C) of this section, the system must report
the running annual average TTHM and HAA5 concentrations as determined
under the requirements of §290.113 of this title.
(B) If the system meets alternative compliance criterion
Number 4, subsection (b)(2)(D) of this section, the system must report
the running annual average TTHM and HAA5 concentrations as determined
under the requirements of §290.113 or §290.115 of this title,
and report all disinfectants used by the system during last 12 months.
(C) If the system meets alternative compliance criterion
Number 5, subsection (b)(2)(E) of this section, the system must report
the average source water SUVA for each of the preceding 12 months.
(D) If the system meets alternative compliance criterion
Number 6, subsection (b)(2)(F) of this section, the system must report
the average treated water SUVA for each of the preceding 12 months.
(E) If the system practices softening and meets alternative
compliance criterion Number 8, subsection (b)(2)(H) of this section,
the system must report the source water and treated water magnesium
concentrations and the average percent removal of magnesium obtained
during each of the preceding 12 months.
(F) A system that does not meet any of the alternative
compliance criteria must apply for the Step 2 alternative removal
requirements and must submit the results of Step 2 jar testing.
(f) Compliance determination. Compliance with the requirements
of this section shall be based on the following criteria:
(1) A system that fails to conduct the monitoring tests
required by this section commits a monitoring violation. Failure to
monitor will be treated as a violation for the entire period covered
by the annual average.
(2) A system that fails to report the results of monitoring
tests required by this section commits a reporting violation. Systems
may use only data collected under the provisions of this section to
qualify for reduced monitoring.
(3) A system that does not meet any of the alternative
compliance criteria and does not achieve the required TOC removal
commits a treatment technique violation. Compliance shall be determined
quarterly by determining an annual average removal ratio using the
following method:
(A) The actual monthly TOC percent removal must be
determined for each month. The actual removal for a TOC sample set
is equal to (1 - (treated water TOC/source water TOC)). The actual
monthly percent removal is calculated as the average of all actual
removals for all TOC sample sets collected in the month, expressed
as a percent.
(B) The required monthly Step 1 or Step 2 TOC percent
removal must be determined as provided in subsection (b) of this section.
The executive director will approve or disapprove Step 2 requirements
based on jar or pilot data. Until the executive director approves
the Step 2 TOC removal requirements, the system must meet the Step
1 TOC removals contained in subsection (b)(1) of this section.
(C) The monthly removal ratio must be determined. The
monthly removal ratio is determined by dividing the actual monthly
TOC percent removal for each month by the required monthly Step 1
or approved Step 2 TOC percent removal for the month. The alternative
compliance criteria may be used on a monthly basis as described in
clauses (i) - (iv) of this subparagraph.
(i) If the monthly average source or treated water
TOC is less than 2.0 mg/L, a monthly removal ratio value of 1.0 may
be assigned (in lieu of the value calculated in subparagraph (C) of
this paragraph) when calculating compliance under the provisions of
this section.
(ii) If the monthly average water source or treated
SUVA level is less than 2.0 L/mg-m, a monthly removal ratio value
of 1.0 may be assigned (in lieu of the value calculated in subparagraph
(C) of this paragraph) when calculating compliance under the provisions
of this section.
(iii) In any month that a softening system lowers alkalinity
below 60 mg/L (as CaCO3), a monthly removal ratio value of 1.0 may
be assigned (in lieu of the value calculated in subparagraph (C) of
this paragraph) when calculating compliance under the provisions of
this section.
(iv) In any month that a softening system removes at
least 10 mg/L of magnesium hardness (as CaCO3) a monthly value of
1.0 may be assigned (in lieu of the value calculated in subparagraph
(C) of this paragraph) when calculating compliance under the provisions
of this section.
(D) The annual average removal ratio must be determined.
The annual average removal ratio is the average of all monthly removal
ratios over the most recent 12-month period. To determine the annual
average removal ratio, determine the sum of all monthly removal ratios
in the most recent 12-month period, and divide that sum by 12.
(E) If the annual average removal ratio is less than
1.00, the system commits a treatment technique violation.
(4) A public water system that fails to do a required
public notice or certify that the public notice has been performed
commits a public notice violation.
(g) Public Notification. A public water system that
violates the treatment technique requirements of this section must
notify the executive director and the system's customers.
(1) A public water system that commits a TOC treatment
technique violation shall notify the executive director and the water
system customers in accordance with the requirements of §290.122(b)
of this title (relating to Public Notification).
(2) A public water system which fails to conduct the
monitoring required by this section must notify its customers of the
violation in accordance with the requirements of §290.122(c)
of this title.
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| Source Note: The provisions of this §290.112 adopted to be effective September 13, 2000, 25 TexReg 8880; amended to be effective May 16, 2002, 27 TexReg 4127; amended to be effective January 9, 2008, 33 TexReg 198; amended to be effective May 15, 2011, 36 TexReg 2860; amended to be effective November 8, 2012, 37 TexReg 8849; amended to be effective March 30, 2017, 42 TexReg 1466 |
