| (a) The following monitoring requirements apply in
the Beaumont-Port Arthur, Bexar County, Dallas-Fort Worth, El Paso,
and Houston-Galveston-Brazoria areas, as defined in §115.10 of
this title (relating to Definitions). An affected owner or operator
shall install and maintain monitors to measure operational parameters
of any of the following control devices installed to meet applicable
control requirements. Such monitors must be sufficient to demonstrate
proper functioning of those devices to design specifications.
(1) For a direct-flame incinerator, the owner or operator
shall continuously monitor the exhaust gas temperature immediately
downstream of the device.
(2) For a condensation system, the owner or operator
shall continuously monitor the outlet gas temperature to ensure the
temperature is below the manufacturer's recommended operating temperature
for controlling the volatile organic compounds (VOC) vapors routed
to the device.
(3) For a carbon adsorption system or carbon adsorber,
as defined in §101.1 of this title (relating to Definitions),
the owner or operator shall:
(A) continuously monitor the exhaust gas VOC concentration
of a carbon adsorption system that regenerates the carbon bed directly
to determine breakthrough. For the purpose of this paragraph, breakthrough
is defined as a measured VOC concentration exceeding 100 parts per
million by volume above background expressed as methane; or
(B) switch the vent gas flow to fresh carbon at a regular
predetermined time interval for a carbon adsorber or carbon adsorption
system that does not regenerate the carbon directly. The time interval
must be less than the carbon replacement interval determined by the
maximum design flow rate and the VOC concentration in the gas stream
vented to the carbon adsorption system or carbon adsorber.
(4) For a catalytic incinerator, the owner or operator
shall continuously monitor the inlet and outlet gas temperature.
(5) For a vapor recovery unit used to comply with §115.112(e)(3)
of this title (relating to Control Requirements), the owner or operator
shall continuously monitor at least one of the following operational
parameters:
(A) run-time of the compressor or motor in a vapor
recovery unit;
(B) total volume of recovered vapors; or
(C) other parameters sufficient to demonstrate proper
functioning to design specifications.
(6) For a control device not listed in this subsection,
the owner or operator shall continuously monitor one or more operational
parameters sufficient to demonstrate proper functioning of the control
device to design specifications.
(b) In Victoria County, the owner or operator shall
monitor operational parameters of any of the emission control devices
listed in this subsection installed to meet applicable control requirements.
(1) For a direct-flame incinerator, the owner or operator
shall continuously monitor the exhaust gas temperature immediately
downstream of the device.
(2) For a condensation system or catalytic incinerator,
the owner or operator shall continuously monitor the inlet and outlet
gas temperature.
(3) For a carbon adsorption system or carbon adsorber,
the owner or operator shall continuously monitor the exhaust gas VOC
concentration to determine if breakthrough has occurred. The owner
or operator may conduct this monitoring using Method 21, as specified
in §115.117 of this title, if the monitoring is conducted once
every seven calendar days.
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| Source Note: The provisions of this §115.115 adopted to be effective December 29, 2011, 36 TexReg 8862; amended to be effective June 25, 2015, 40 TexReg 3907; amended to be effective May 16, 2024, 49 TexReg 3292 |
