The owner or operator of each batch process operation in the
Beaumont-Port Arthur, Bexar County, and Houston-Galveston-Brazoria
areas, shall comply with the following.
(1) Performance testing conditions. For the purpose
of determining compliance with the control requirements of this division
(relating to Batch Processes), the process unit shall be run at a
scenario that represents maximum batch rates (e.g., three batches
per day, 1,000 lbs per batch, etc.) during any performance test.
(2) Test methods. The owner or operator of each batch
process operation shall use the following methods to determine compliance
with the percent reduction efficiency requirement of §115.162
of this title (relating to Control Requirements).
(A) Flow rate.
(i) Test Methods 1 or 1A (40 Code of Federal Regulations
(CFR) 60, Appendix A) as appropriate, shall be used for selection
of the sampling sites if the flow rate measuring device is a rotameter.
No traverse is necessary when the flow measuring device is an ultrasonic
probe. The control device inlet sampling sites for determination of
vent stream volatile organic compounds (VOC) composition reduction
efficiency shall be before the control device and after the control
device.
(ii) Test Methods 2, 2A, 2C, or 2D (40 CFR 60, Appendix
A) as appropriate, shall be used for determination of gas stream volumetric
flow rate. Flow rate measurements shall be made continuously.
(B) Concentration of VOC. Test Method 18 (40 CFR 60,
Appendix A) (gas chromatography) or Test Method 25A (40 CFR 60, Appendix
A) (flame ionization) shall be used to determine the concentration
of VOC in the control device inlet and outlet.
(i) The sampling time for each run shall be the entire
length of the batch cycle, during which readings shall be taken:
(I) continuously if Method 25A is used; or
(II) as often as is possible using Method 18, with
a maximum of one-minute intervals between measurements throughout
the batch cycle.
(ii) The emission rate of the process vent or inlet
to the control device shall be determined by combining continuous
concentration and flow rate measurements at simultaneous points throughout
the batch cycle.
(iii) The mass flow rate of the control device outlet
shall be determined by combining continuous concentration and flow
rate measurements at simultaneous points throughout the batch cycle.
(iv) The efficiency of the control device shall be
determined by integrating the mass flow rates obtained in clauses
(ii) and (iii) of this subparagraph over the time of the batch cycle,
and dividing the difference in inlet and outlet mass flow totals by
the inlet mass flow total.
(C) Performance requirements for flares and vapor combustors.
(i) For flares, the performance test requirements of
40 CFR 60.18(b) shall apply.
(ii) For vapor combustors, the owner or operator may
consider the unit to be a flare and meet the performance test requirements
of 40 CFR 60.18(b).
(iii) Compliance with the requirements of 40 CFR 60.18(b)
will be considered to represent 98% control of the VOC in the flare
inlet.
(D) Minor modifications. Minor modifications to these
test methods may be used, if approved by the executive director.
(E) Alternate test methods. Test methods other than
those specified in subparagraphs (B) and (C) of this paragraph may
be used if validated by 40 CFR 63, Appendix A, Test Method 301 (effective
December 29, 1992). For the purposes of this paragraph, substitute
"executive director" each place that Test Method 301 references "administrator."
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Source Note: The provisions of this §115.165 adopted to be effective November 18, 1999, 24 TexReg 10095; amended to be effective January 18, 2001, 26 TexReg 493; amended to be effective May 16, 2024, 49 TexReg 3292 |