1) Applicability
The requirements of subsection (c)(2) must apply to all VOM emitting process emission units employing capture equipment (e.g., hoods, ducts), except those cases noted in this subsection (c)(1).
A) If an emission unit is equipped with (or uses) a permanent total enclosure (PTE) that meets Agency and USEPA specifications, and which directs all VOM to a control device, then the emission unit is exempted from the requirements described in subsection (c)(2). The Agency and USEPA specifications to determine whether a structure is considered a PTE are given in Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section
219.112. In this instance, the capture efficiency is assumed to be 100 percent and the emission unit is still required to measure control efficiency using appropriate test methods as specified in subsection (d).
B) If an emission unit is equipped with (or uses) a control device designed to collect and recover VOM (e.g., carbon adsorber), an explicit measurement of capture efficiency is not necessary provided that the conditions given below are met. The overall control of the system can be determined by directly comparing the input liquid VOM to the recovered liquid VOM. The general procedure for use in this situation is given in 40 CFR
60.433, incorporated by reference in Section 219.112, with the following additional restrictions:
i) The source owner or operator must obtain data each operating day for the solvent usage and solvent recovery to permit the determination of the solvent recovery efficiency of the system each operating day using a 7-day rolling period. The recovery efficiency for each operating day is computed as the ratio of the total recovered solvent for that day and the most recent prior 6 operating days to the total solvent usage for the same 7-day period used for the recovered solvent, rather than a 30-day weighted average as given in 40 CFR
60.433 incorporated by reference in Section 219.112. This ratio must be expressed as a percentage. The ratio must be computed within 72 hours following each 7-day period. A source that believes that the 7-day rolling period is not appropriate may use an alternative multi-day rolling period not to exceed 30 days, with the approval of the Agency and USEPA. In addition, the criteria in subsection (c)(1)(B)(ii) or (c)(1)(B)(iii) must be met.
ii) The solvent recovery system (i.e., capture and control system) must be dedicated to a single coating line, printing line, or other discrete activity that by itself is subject to an applicable VOM emission standard.
iii) However if the solvent recovery system controls more than one coating line, printing line or other discrete activity that by itself is subject to an applicable VOM emission standard, the overall control (i.e., the total recovered VOM divided by the sum of liquid VOM input from all lines and other activities venting to the control system) must meet or exceed the most stringent standard applicable to any line or other discrete activity venting to the control system.
2) Capture Efficiency Protocols
The capture efficiency of an emission unit must be measured using one of the protocols given below. Appropriate test methods to be utilized in each of the capture efficiency protocols are described in appendix M of 40 CFR 51, incorporated by reference in Section 219.112. Any error margin associated with a test method or protocol may not be incorporated into the results of a capture efficiency test. If these techniques are not suitable for a particular process, then an alternative capture efficiency protocol may be used, pursuant to the provisions of Section 219.108(b).
A) Gas/gas method using temporary total enclosure (TTE). The Agency and USEPA specifications to determine whether a temporary enclosure is considered a TTE are given in Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section 219.112. The capture efficiency equation to be used for this protocol is:
Click
here to view image
where:
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CE
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=
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capture efficiency, decimal fraction;
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Gw
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=
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mass of VOM captured and delivered to control device using a TTE;
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Fw
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=
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mass of uncaptured VOM that escapes from a TTE.
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Method 204B or 204C contained in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain Gw. Method 204D in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain Fw.
B) Liquid/gas method using TTE. The Agency and USEPA specifications to determine whether a temporary enclosure is considered a TTE are given in Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section 219.112. The capture efficiency equation to be used for this protocol is:
Click
here to view image
where:
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CE
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=
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capture efficiency, decimal fraction;
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L
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=
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mass of liquid VOM input to process emission unit;
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Fw
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=
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mass of uncaptured VOM that escapes from a TTE.
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Method 204A or 204F contained in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain L. Method 204 in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain Fw.
C) Gas/gas method using the building or room (building or room enclosure), in which the affected coating line, printing line or other emission unit is located, as the enclosure, as determined by Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section 219.112, and in which "F
B" and "G" are measured while operating only the affected line or emission unit. All fans and blowers in the building or room must be operated as they would under normal production. The capture efficiency equation to be used for this protocol is:
Click
here to view image
where:
|
CE
|
=
|
capture efficiency, decimal fraction;
|
|
|
|
|
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G
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=
|
mass of VOM captured and delivered to control device;
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FB
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=
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mass of uncaptured VOM that escapes from building enclosure.
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Method 204B or 204C contained in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain G. Method 204E in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain FB.
D) Liquid/gas method using the building or room (building or room enclosure), in which the affected coating line, printing line or other emission unit is located, as the enclosure as determined by Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section 219.112, and in which "F
B" and "L" are measured while operating only the affected line emission unit. All fans and blowers in the building or room must be operated as they would under normal production. The capture efficiency equation to be used for this protocol is:
Click
here to view image
where:
|
CE
|
=
|
capture efficiency, decimal fraction;
|
|
|
|
|
|
L
|
=
|
mass of liquid VOM input to process emission unit;
|
|
|
|
|
|
FB
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=
|
mass of uncaptured VOM that escapes from building enclosure.
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Method 204A or 204F contained in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain L. Method 204E in appendix M of 40 CFR 51, incorporated by reference in Section 219.112, is used to obtain FB.
E) Mass balance using Data Quality Objective (DQO) or Lower Confidence Limit (LCL) protocol. For a liquid/gas input where an owner or operator is using the DQO/LCL protocol and not using an enclosure as described in Method 204 of appendix M of 40 CFR
51, incorporated by reference in Section 219.112, the VOM content of the liquid input (L) must be determined using Method 204A or 204F in appendix M of 40 CFR
51, incorporated by reference in Section 219.112. The VOM content of the captured gas stream (G) to the control device must be determined using Method 204B or 204C in appendix M of 40 CFR
51, incorporated by reference in Section 219.112. The results of capture efficiency calculations (G/L) must satisfy the DQO or LCL statistical analysis methodology as described in Section 3 of USEPA's "Guidelines for Determining Capture Efficiency", incorporated by reference at Section
219.112 of this Part. Where capture efficiency testing is done to determine emission reductions for the purpose of establishing emission credits for offsets, shutdowns, and trading, the LCL protocol cannot be used for these applications. In enforcement cases, the LCL protocol cannot confirm non-compliance; capture efficiency must be determined using a protocol under subsection (c)(2)(A), (B), (C) or (D), the DQO protocol of this subsection (c)(2)(E), or an alternative protocol pursuant to Section
219.108(b).
BOARD NOTE: Where LCL was used in testing emission units that are the subject of later requests for establishing emission credits for offsets, shutdowns, and trading, prior LCL results may not be relied upon to determine the appropriate amount of credits. Instead, to establish the appropriate amount of credits, additional testing may be required that would satisfy the protocol of Section 219.105(c)(2)(A), (B), (C) or (D), the DQO protocol of Section 219.105(c)(2)(E), or an alternative protocol pursuant to Section 219.108(b).
3) Simultaneous testing of multiple lines or emission units with a common control device. If an owner or operator has multiple lines sharing a common control device, the capture efficiency of the lines may be tested simultaneously, subject to the following provisions:
A) Multiple line testing must meet the criteria of Section 4 of USEPA's "Guidelines for Determining Capture Efficiency", incorporated by reference at Section 219.112;
B) The most stringent capture efficiency required for any individual line or unit must be met by the aggregate of lines or units; and
C) Testing of all the lines of emission units must be performed with the same capture efficiency test protocol.
4) Recordkeeping and Reporting
A) All owners or operators affected by this subsection must maintain a copy of the capture efficiency protocol submitted to the Agency and the USEPA on file. All results of the appropriate test methods and capture efficiency protocols must be reported to the Agency within 60 days after the test date. A copy of the results must be kept on file with the source for a period of 3 years.
B) If any changes are made to capture or control equipment, then the source is required to notify the Agency and the USEPA of these changes and a new test may be required by the Agency or the USEPA.
C) The source must notify the Agency 30 days prior to performing any capture efficiency or control test. At that time, the source must notify the Agency which capture efficiency protocol and control device test methods will be used. Notification of the actual date and expected time of testing must be submitted a minimum of 5 working days prior to the actual date of the test. The Agency may at its discretion accept notification with shorter advance notice provided that such arrangements do not interfere with the Agency's ability to review the protocol and/or observe testing.
D) Sources utilizing a PTE must demonstrate that this enclosure meets the requirement given in Method 204 in appendix M of 40 CFR
51, incorporated by reference in Section 219.112, for a PTE during any testing of their control device.
E) Sources utilizing a TTE must demonstrate that their TTE meets the requirements given in Method 204 in appendix M or 40 CFR
51, incorporated by reference in Section 219.112, for a TTE during any testing of their control device. The source must also provide documentation that the quality assurance criteria for a TTE have been achieved.
F) Any source utilizing the DQO or LCL protocol must submit the following information to the Agency with each test report:
i) A copy of all test methods, Quality Assurance/Quality Control procedures, and calibration procedures to be used from those described in appendix M of 40 CFR
51, incorporated by reference in Section 219.112;
ii) A table with information on each sample taken, including the sample identification and the VOM content of the sample;
iii) The quantity of material used for each test run;
iv) The quantity of captured VOM for each test run;
v) The capture efficiency calculations and results for each test run;
vi) The DQO and/or LCL calculations and results; and
vii) The Quality Assurance/Quality Control results, including how often the instruments were calibrated, the calibration results, and the calibration gases used.