[Federal Register Volume 81, Number 168 (Tuesday, August 30, 2016)]
[Rules and Regulations]
[Pages 59799-59826]
[FR Doc No: 2016-19642]

Vol. 81

Tuesday,

No. 168

August 30, 2016

Part III

Environmental Protection Agency

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40 CFR Parts 51, 60, 61, et al.

Revisions to Test Methods, Performance Specifications, and Testing
Regulations for Air Emission Sources; Final Rule

Federal Register / Vol. 81 , No. 168 / Tuesday, August 30, 2016 /
Rules and Regulations

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 51, 60, 61, and 63

[EPA-HQ-OAR-2014-0292; FRL-9950-57-OAR]
RIN 2060-AS34

Revisions to Test Methods, Performance Specifications, and
Testing Regulations for Air Emission Sources

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: This action promulgates technical and editorial corrections
and revisions to regulations related to source testing of emissions. We
have made corrections and updates to testing provisions, and added
newly approved alternatives to existing testing regulations. These
revisions will improve the quality of data and provide flexibility in
the use of approved alternative procedures. The revisions do not impose
any new substantive requirements on source owners or operators.

DATES: The final rule is effective on October 31, 2016. The
incorporation by reference materials listed in the rule are approved by
the Director of the Federal Register as of October 31, 2016.

ADDRESSES: The EPA has established a docket for this action under
Docket ID No. EPA-HQ-OAR-2014-0292. All documents in the docket are
listed on the http://www.regulations.gov Web site. Although listed in
the index, some information is not publicly available, e.g.,
confidential business information or other information whose disclosure
is restricted by statute. Certain other material, such as copyrighted
material, is not placed on the Internet and will be publicly available
only in hard copy. Publicly available docket materials are available
electronically through http://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: Ms. Lula H. Melton, Office of Air
Quality Planning and Standards, Air Quality Assessment Division (E143-
02), Environmental Protection Agency, Research Triangle Park, NC 27711;
telephone number:<PHONE_NUMBER>; fax number:<PHONE_NUMBER>; email
address<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION: The supplementary information in this
preamble is organized as follows:

Table of Contents

I. General Information
    A. Does this action apply to me?
    B. What action is the Agency taking?
    C. Judicial Review
II. Background
III. Summary of Amendments
    A. Appendix M of Part 51
    B. Method 201A of Appendix M of Part 51
    C. Method 202 of Appendix M of Part 51
    D. Appendix P of Part 51
    E. General Provisions (Subpart A) of Part 60
    F. Standards of Performance for Stationary Spark Ignition
Internal Combustion Engines (Subpart JJJJ) of Part 60
    G. Method 1 of Appendix A-1 of Part 60
    H. Method 2 of Appendix A-1 of Part 60
    I. Method 2G of Appendix A-2 of Part 60
    J. Method 3C of Appendix A-2 of Part 60
    K. Method 4 of Appendix A-3 of Part 60
    L. Method 5 of Appendix A-3 of Part 60
    M. Method 5H of Appendix A-3 of Part 60
    N. Method 5I of Appendix A-3 of Part 60
    O. Method 6C of Appendix A-4 of Part 60
    P. Method 7E of Appendix A-4 of Part 60
    Q. Method 10 of Appendix A-4 of Part 60
    R. Methods 10A and 10B of Appendix A-4 of Part 60
    S. Method 15 of Appendix A-5 of Part 60
    T. Method 16C of Appendix A-6 of Part 60
    U. Method 18 of Appendix A-6 of Part 60
    V. Method 25C of Appendix A-7 of Part 60
    W. Method 26 of Appendix A-8 of Part 60
    X. Method 26A of Appendix A-8 of Part 60
    Y. Method 29 of Appendix A-8 of Part 60
    Z. Method 30A of Appendix A-8 of Part 60
    AA. Method 30B of Appendix A-8 of Part 60
    BB. Appendix B to Part 60--Performance Specifications
    CC. Performance Specification 1 of Appendix B of Part 60
    DD. Performance Specification 2 of Appendix B of Part 60
    EE. Performance Specification 3 of Appendix B of Part 60
    FF. Performance Specification 4A of Appendix B of Part 60
    GG. Performance Specification 11 of Appendix B of part 60
    HH. Performance Specification 15 of Appendix B of Part 60
    II. Performance Specification 16 of Appendix B of Part 60
    JJ. Procedure 2 of Appendix F of Part 60
    KK. General Provisions (Subpart A) of Part 61
    LL. Method 107 of Appendix B of Part 61
    MM. General Provisions (Subpart A) of Part 63
    NN. Method 320 of Appendix A of Part 63
IV. Public Comments on the Proposed Rule
V. Statutory and Executive Order Reviews
    A. Executive Order 12866: Regulatory Planning and Review and
Executive Order 13563: Improving Regulation and Regulatory Review
    B. Paperwork Reduction Act (PRA)
    C. Regulatory Flexibility Act (RFA)
    D. Unfunded Mandates Reform Act (UMRA)
    E. Executive Order 13132: Federalism
    F. Executive Order 13175: Consultation and Coordination With
Indian Tribal Governments
    G. Executive Order 13045: Protection of Children From
Environmental Health Risks and Safety Risks
    H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution or Use
    I. National Technology Transfer and Advancement Act (NTTAA) and
1 CFR part 51
    J. Executive Order 12898: Federal Actions To Address
Environmental Justice in Minority Populations and Low-Income
Populations
    K. Congressional Review Act (CRA)v

I. General Information

A. Does this action apply to me ?

    The revisions promulgated in this final rule apply to a large
number of industries that are already subject to the current provisions
of 40 Code of Federal Regulations (CFR) parts 51, 60, 61, and 63. For
example, Performance Specification 4A applies to municipal waste
combustors and hazardous waste incinerators. We did not list all of the
specific affected industries or their North American Industry
Classification System (NAICS) codes herein since there are many
affected sources. If you have any questions regarding the applicability
of this action to a particular entity, consult either the air
permitting authority for the entity or your EPA Regional representative
as listed in 40 CFR 63.13.

B. What action is the Agency taking?

    We are promulgating technical and editorial corrections and
revisions to regulations related to source testing of emissions. More
specifically, we are correcting typographical and technical errors,
updating obsolete testing procedures, adding approved testing
alternatives, and clarifying testing requirements.

C. Judicial Review

    Under section 307(b)(1) of the Clean Air Act (CAA), judicial review
of this final rule is available by filing a petition for review in the
United States Court of Appeals for the District of Columbia Circuit by
October 31, 2016. Under section 307(d)(7)(B) of the CAA, only an
objection to this final rule that was raised with reasonable
specificity during the period for public comment can be raised during
judicial review. Moreover, under section 307(b)(2) of the CAA, the
requirements that are the subject of this final rule may not be
challenged later in civil or criminal proceedings brought by the EPA to
enforce these requirements.

II. Background

    The revisions to test methods, performance specifications, and
testing regulations were proposed in the Federal Register on September
8, 2015 (80 FR 54146). The public comment period ended December 9,
2015, and 42 comment letters were received from the public. Changes
were made to this final rule based on the public comments.

III. Summary of Amendments

A. Appendix M of Part 51

    In paragraph (4)(a) of appendix M to part 51, Methods 30A and 30B
are added to the list of methods not requiring the use of audit
samples.

B. Method 201A of Appendix M of Part 51

    In Method 201A, the constant in equation 9 is corrected from
0.07657 to 0.007657.

C. Method 202 of Appendix M of Part 51

    In Method 202, section 3.8 is added to incorporate ASTM E617-13 by
reference. The first sentence in section <IP_ADDRESS> is revised by adding
``back half of the filterable PM filter holder.'' Also, in section
<IP_ADDRESS>, sentences inadvertently omitted in the proposed rule are re-
inserted. In section 9.10, the erroneous statement ``You must purge the
assembled train as described in sections <IP_ADDRESS> and <IP_ADDRESS>.'' is
corrected to reference section 8.5.3. Sections 10.3 and 10.4 are added
to require calibration of the field balance used to weigh impingers and
to require a multipoint calibration of the analytical balance. In
section 10.3, the proposed language is revised to allow the use of a
Class 6 tolerance weight (or better) in lieu of the proposed Class 3
(or better) tolerance weight for checking the field balance accuracy
because the calibration weight does not need to be any better than one-
half of the tolerance for the measurement. Sections <IP_ADDRESS>, <IP_ADDRESS>,
<IP_ADDRESS>, <IP_ADDRESS> and figure 7 are re-inserted.

D. Appendix P of Part 51

    In appendix P of part 51, section 3.3, the erroneous reference to
section 2.1 of Performance Specification 2 of appendix B of part 60 is
corrected to section 6.1. Also, in section 3.3, the reference to the
National Bureau of Standards is changed to the National Institute of
Standards and Technology. In section 5.1.3, the erroneous reference to
paragraph 4.1.4 is changed to reflect the correct reference to
paragraphs 3.1.4 and 3.1.5.

E. General Provisions (Subpart A) of Part 60

    In the General Provisions of part 60, section 60.8(f) is revised to
require the reporting of specific emissions test data in test reports.
These data elements are required regardless of whether the report is
submitted electronically or in paper format. Note that revisions are
made to the data elements (that were listed in the proposed rule) to
provide clarity and to more appropriately define and limit the extent
of elements reported for each test method included in a test report.
These modifications ensure that emissions test reporting includes all
data necessary to assess and assure the quality of the reported
emissions data and that the reported information appropriately
describes and identifies the specific unit covered by the emissions
test report. Section 60.17(g) is revised to add ASTM D6911-15 to the
list of incorporations by reference.

F. Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines (Subpart JJJJ) of Part 60

    We received a request for a public hearing on this rule. We held a
hearing in Research Triangle Park, North Carolina on October 8, 2015.
All comments received at that hearing were related to our proposed
revisions to subpart JJJJ, and a transcript of that hearing is
available in the rule docket [EPA-HQ-OAR-2014-0292]. We also received a
substantial number of comments from the public, both supportive of and
in opposition to the revisions that we proposed.
    At issue is the use of specific methodologies in a manner allowing
a tester to speciate the volatile organic compounds (VOC) in the
emissions and, from those speciated measurements, calculate a total VOC
emissions rate using Fourier Transform Infrared Spectroscopy (FTIR
using Method 320 or ASTM D6348-03) or Method 18, a measurement
methodology that makes use of a combination of capture and analytical
approaches. We proposed to remove Method 320 and ASTM D6348-03 as
options for measuring VOC emissions under subpart JJJJ due to the lack
of a consistent, demonstrable, and validated approach to measuring
total VOC emissions. This decision was primarily due to the lack of a
discrete list of compounds identified as those constituting the total
VOC for the sources affected by subpart JJJJ. We proposed to eliminate
the option to use these measurement approaches and leave Method 25A
itself, a total hydrocarbon measurement approach, as the sole means of
determining compliance with the total VOC emissions limits in the rule.
We are concerned that implementation of Methods 320, ASTM D6348-03, and
Method 18 does not provide proper and consistent quality assurance (QA)
for compliance demonstration with total VOC measurement as required
under subpart JJJJ.
    Several commenters stated that prohibiting the use of FTIR to
measure VOC and leaving Method 25A as the sole means of demonstrating
compliance would result in an increased cost to industry. The
commenters reasoned that this would decrease the number of tests that
could be conducted in a single day because Method 25A requires more
time to set up and run. We did not find compelling support for this
argument. A properly conducted emissions test using FTIR technology and
Method 320 or ASTM D6348-03 takes several hours to conduct, including
time for equipment setup including the same sampling probe and heated
sample transport line requirements as Method 25A, warmup which takes
the same amount of time as Method 25A, conducting appropriate
calibration and spiking data quality assessments very similar in
duration to the required Method 25A calibration, actual source sampling
time to span three 1-hour periods, leak tests, and post-test QA
procedures common to each method. While it is possible to conduct two
such test runs in a single 12- to 14-hour day, it is likewise possible
to conduct two such test runs with Method 25A in that same time frame.
    Several commenters also remarked that using FTIR is less complex,
easier, and quicker than using Method 25A, but we do not find this
argument sufficiently compelling to reverse our proposed revisions. We
understand that while an experienced spectroscopist can operate an FTIR
with relative ease as compared to a novice, the process of quality
assuring emissions data measured by FTIR in accordance with Method 320
or ASTM D6348-03 is not a trivial matter. Calibration checks and matrix
spiking of target compounds, including the ``most difficult to
recover'' compound (as required by Method 320), is both challenging and
time consuming due to the need to rule out interferences that may be
caused by the emissions gas matrix while working to individually
quantify each VOC in that matrix. In summation, we do not agree that
the use of FTIR for quantification of total VOC is quick, easy or less
expensive to

conduct when compared with the use of Method 25A.
    Several commenters provided information to the docket, and others
stated individually during the public hearing that they have provided a
list of VOC to the docket, or have compiled a list of VOC or recommend
that EPA address the FTIR measurement issue through the agency
providing a list of VOC that make up 95 percent of the emissions from
natural gas-fired spark ignition (SI) engines. We agree with commenters
that a list of VOC could be developed; however, we recognize that the
list must represent total VOC (all the VOC that could be emitted from
SI engines affected by subpart JJJJ), as that is the compliance
requirement stated in the rule. We have not stated that 95 percent of
the VOC emissions are the target goal for such a list. In a memo to the
docket of this rule (Technical memorandum dated September 28, 2015, to
Docket ID No. EPA-HQ-OAR-2014-0292 titled, ``Proposal to remove Methods
18, 320, and ASTM D6348-03 as Acceptable Methods for Measuring Total
VOC Under 40 CFR 60, Subpart JJJJ''), we state that we are actively
seeking sufficient documentation to create a complete list of VOC to
support a speciated hydrocarbon measurement approach such as FTIR and/
or Method 18. We received data from commenters that moves us toward
compiling such a list, but we did not receive sufficient demonstration
that all VOC were represented in that list. Additionally, while we
received information on VOC present in well-operated and controlled
engines, the data does not include VOC that may be present largely
during, or only during, poor performance periods and could, thereby,
serve as key indicators of engines that are not well-operated, well-
controlled, or in compliance with the applicable standard. Therefore,
we remain unable to define a complete list of VOC that would need to be
quantified by a speciated measurement approach to demonstrate that
total VOC were measured during a compliance test. Even so, we are
swayed by arguments such as those made in support of speciated
measurement approaches, specifically their ability to account for
methane and ethane as separate quantifiable emissions.
    Two commenters remarked that they do not believe that Method 25A is
able to produce accurate total VOC values because there is an inherent
issue with the ``difference or subtraction'' method when applied to
compressed natural gas (CNG)-based emissions. We reviewed the data
provided by the commenters in this respect and did not arrive at the
same conclusion. Our review shows that the commenters appear to double-
count some of the emissions in arriving at their results and do not
present compelling evidence that demonstrates the ability of a
hydrocarbon cutter to remove all ethane from the measured gas.
    Two commenters stated that FTIR can measure real-time non-methane,
non-ethane VOC. We agree that this speciated approach is capable of
providing emissions data for methane, ethane, and other VOC in near-
real-time.
    One commenter recommended that we allow FTIR methods since FTIR is
the only technology that can provide a mass emissions rate and since
FTIR does not have a zero drift nor calibration drift problem like
Method 25A. Subpart JJJJ requires the calculation of a mass emissions
rate on a propane basis and Method 25A, calibrated with propane and
using the molecular weight of propane (44.01 lb/lb-mol) for mass
emissions calculations, is quite capable of providing a mass emissions
rate appropriate for determination of compliance with the VOC standards
in subpart JJJJ. In regard to zero drift, Method 25A has QA and quality
control (QC) criteria to limit the acceptance of data where instrument
drift is excessive.
    Three commenters noted that we did not provide supporting data for
proposing to disallow FTIR methods that have been allowed under subpart
JJJJ for the past 7 years. We submitted a supporting memo to the docket
(Technical memorandum dated September 28, 2015, to Docket ID No. EPA-
HQ-OAR-2014-0292 titled, ``Proposal to Remove EPA Methods 18, 320, and
ASTM D6348-03 as Acceptable Methods for Measuring Total VOC Under 40
CFR 60, Subpart JJJJ'') that provides the reasoning and justification
for our proposal.
    One commenter recommended that changes to subpart JJJJ test methods
be proposed as a separate rulemaking under subpart JJJJ. We believe
that we have the authority to make necessary or otherwise appropriate
changes to a specific test procedure or pollutant measurement
requirement in a rule through this periodic rulemaking.
    One commenter agreed with our proposed position that FTIR should
not be used to measure total VOC, but remarked that Method 18 should
continue to be allowed since it allows direct measurement of VOC
constituents using gas chromatography and does not rely on differential
methods or require multiple test methods. We found the latter arguments
and reasoning to be persuasive and compelling. Method 18 does contain
provisions to screen and calibrate for VOC present in the emissions and
thereby measure total VOC from a specific source. While this can be a
complex and sometimes tedious undertaking, we recognize that it is an
appropriate approach to measure total VOC from a specific source and
are modifying the final rule language to reflect that this is
allowable.
    Two additional commenters agreed with our proposed position that
the current FTIR methodologies are not adequately measuring total VOC.
One of the commenters remarked that testers do not provide adequate
total VOC results. The other commenter recommended only allowing FTIR
if the QA is complete and accurate and if all VOC are proven to be
accounted for. We are swayed by this commenter's support for complete
QA/QC of data and stipulation that all VOC are proven to be accounted
for. Although we do not currently possess sufficient data to compile a
complete list of VOCs expected to be emitted from SI engines, we
believe that where data with complete QA/QC are available, we may
acquire sufficient data over time.
    This action finalizes requirements to clarify the conduct of QA/QC
procedures and report the QA/QC data with the emissions measurement
data when applying Method 320 and ASTM D6348-03. We will revisit this
decision and make a subsequent determination of the appropriateness for
the use of Method 320 and/or ASTM-D6348 during the first risk and
technology review evaluation for this sector.
    In Table 2 of subpart JJJJ, the allowances to use Method 320 and
ASTM D6348-03 are retained. The language requiring the reporting of
specific QA/QC data when these test methods are used has been added to
paragraph 60.4245(d).
    The typographical error in the proposed Table 2 of subpart JJJJ is
corrected; ``methane cutter'' is replaced with ``hydrocarbon cutter''
in paragraph (5) of section c.

G. Method 1 of Appendix A-1 of Part 60

    In Method 1, section <IP_ADDRESS>, the word ``istances'' is changed to
``distances'' in the second sentence, and the last two sentences in
this section (inadvertently omitted in the proposed rule) are re-
inserted. The second figure labeled Figure 1-2 is deleted because two
figures labeled Figure 1-2 were inadvertently included.

H. Method 2 of Appendix A-1 of Part 60

    In Method 2, instructions are given for conducting S-type pitot
calibrations. Currently, the same equipment is commonly used for both
Methods 2 and

2G (same S-type pitot), but the calibration procedure is slightly
different in each method. Other key pieces that enhance the QA/QC of
the calibrations are added to Method 2, and the amount of blockage
allowed is reduced to improve calibration accuracy. To address these
issues, changes are made to sections 6.7, <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS>,
and <IP_ADDRESS>.3 of Method 2. Sentences in section 6.7 (inadvertently
omitted in the proposed rule) are re-inserted. In section <IP_ADDRESS>, the
erroneous reference to section <IP_ADDRESS> is corrected to section 12.4.4.
The portion of Figure 2-10 labeled (b) is deleted because it is
erroneous, and the label (a) is removed from the figure.

I. Method 2G of Appendix A-2 of Part 60

    In Method 2G, instructions are given for conducting S-type pitot
calibrations. Currently, the same equipment is commonly used for both
Methods 2 and 2G (same S-type pitot), but the calibration procedure is
slightly different in each method. Other key pieces that enhance the
QA/QC of the calibrations are added to the method, and the amount of
blockage allowed is reduced to tighten up calibration accuracy. Changes
are made to sections 6.11.1, 6.11.2, 10.6.6, and 10.6.8 of Method 2G to
address these issues. In section 10.6.6, the proposed language
regarding recording rotational speed is revised based on a public
comment.

J. Method 3C of Appendix A-2 of Part 60

    In Method 3C, section 6.3 is revised to add subsections (6.3.1,
6.3.2, 6.3.3, 6.3.4, and 6.3.5) that clarify the requirements necessary
to check analyzer linearity.

K. Method 4 of Appendix A-3 of Part 60

    In Method 4, section 10.3 (Field Balance) is added to require
calibration of the balance used to weigh impingers. In section 10.3,
the proposed language is revised to allow the use of a Class 6
tolerance weight (or better) in lieu of the proposed Class 3 (or
better) tolerance weight for checking the field balance accuracy
because the calibration weight does not need to be any better than one-
half of the tolerance for the measurement. Section 12.2.5, which gives
another option for calculating the approximate moisture content, is
added. Section 16.4 is revised to clarify that a fuel sample must be
taken and analyzed to develop F-factors required by the alternative
procedure. Also, in section 16.4, percent relative humidity is
inadvertently defined as ``calibrated hydrometer acceptable''; the word
``hydrometer'' is replaced with ``hygrometer.''

L. Method 5 of Appendix A-3 of Part 60

    In Method 5, we erroneously finalized the reference to the Isostack
metering system in 79 FR 11228. Therefore, this reference from section
<IP_ADDRESS> is removed. Broadly applicable test method determinations or
letters of assessments, regarding whether specific alternative metering
equipment meets the specifications of the method as was our intent in
the ``Summary of Comments and Responses on Revisions to Test Methods
and Testing Regulations'' (EPA-HQ-OAR-2010-0114-0045), will continue to
be issued. In section <IP_ADDRESS>, the parenthetical phrase ``(rechecked at
least one point after each test)'' is removed since the requirements
for temperature sensors are given in section 10.5 of Method 5. The
phrase ``after ensuring that all joints have been wiped clean of
silicone grease'' is removed from section <IP_ADDRESS>.5. Sections 10.7 and
10.8 are added to require calibration of the balance used to weigh
impingers and to require a multipoint calibration of the analytical
balance. In section 10.7, the proposed language is revised to allow the
use of a Class 6 tolerance weight (or better) in lieu of the proposed
Class 3 (or better) tolerance weight for checking the field balance
accuracy because the calibration weight does not need to be any better
than one-half of the tolerance for the measurement. In section 10.8,
the proposed language is revised to ``Audit the balance each day it is
used for gravimetric measurements by weighing at least one ASTM E617-13
Class 2 tolerance (or better) calibration weight that corresponds to 50
to 150 percent of the weight of one filter or between 1 g and 5 g.''

M. Method 5H of Appendix A-3 of Part 60

    In Method 5H, sections 10.4 and 10.5 are added to require
calibration of the field balance used to weigh impingers and to require
a multipoint calibration of the analytical balance. In section 10.4,
the proposed language is revised to allow the use of a Class 6
tolerance weight (or better) in lieu of the proposed Class 3 (or
better) tolerance weight for checking the field balance accuracy
because the calibration weight does not need to be any better than one-
half of the tolerance for the measurement. In section 10.5, the
proposed language is revised to ``Audit the balance each day it is used
for gravimetric measurements by weighing at least one ASTM E617-13
Class 2 tolerance (or better) calibration weight that corresponds to 50
to 150 percent of the weight of one filter or between 1 g and 5 g.''

N. Method 5I of Appendix A-3 of Part 60

    In Method 5I, sections 10.1 and 10.2 are added to require
calibration of the field balance used to weigh impingers and to require
a multipoint calibration of the analytical balance. In section 10.1,
the proposed language is revised to allow the use of a Class 6
tolerance weight (or better) in lieu of the proposed Class 3 (or
better) tolerance weight for checking the field balance accuracy
because the calibration weight does not need to be any more accurate
than one-half of the tolerance for the measurement. In section 10.2,
the proposed language is revised to ``Audit the balance each day it is
used for gravimetric measurements by weighing at least one ASTM E617-13
Class 2 tolerance (or better) calibration weight that corresponds to 50
to 150 percent of the weight of one filter or between 1 g and 5 g.''

O. Method 6C of Appendix A-4 of Part 60

    In Method 6C, the language detailing the methodology for performing
interference checks in section 8.3 is revised to clarify and streamline
the procedure. While we continue to believe that quenching can be an
issue for fluorescence analyzers, the language regarding quenching that
was promulgated on February 27, 2014, has raised many questions and is
being removed. It is our opinion that the interference check, if done
properly, using sulfur dioxide (SO2) and both levels of
carbon dioxide (CO2) as specified in Table 7E-3 of Method
7E, will evaluate effects due to quenching. We will continue to
evaluate data as it becomes available and propose additional language,
as needed. However, if you believe that quenching is an issue, we
recommend that you repeat the interference check using the
CO2 values specified in Table 7E-3 and an SO2
value similar to your measured stack emissions.

P. Method 7E of Appendix A-4 of Part 60

    In Method 7E, section 8.1.2, the requirements/specifications for
the 3-point sampling line are revised to be consistent with Performance
Specification 2; the new requirement is 0.4, 1.2, and 2.0 meters.
    The language in section 8.2.7 regarding quenching that was
promulgated on February 27, 2014, has raised many questions, and is
being

removed at this time. It is our opinion that the interference check, if
done properly, using the gas levels specified in Table 7E-3 of Method
7E, will evaluate analyzer bias. We will continue to evaluate data as
it becomes available and propose additional language in the future as
needed. However, if you feel that analyzer bias is an issue, we
recommend that you repeat the interference check using calibration gas
values similar to your measured stack emissions. The language in
section 8.2.7 requiring that the interference check be performed
periodically or after major repairs has also been removed to be
consistent with the language found in section 8.2.7 (2), which states
``This interference test is valid for the life of the instrument unless
major analytical components (e.g., the detector) are replaced with
different model parts.''
    The word ``equations'' is replaced with ``equation'' in the
sentence in section 12.8 that reads ``If desired, calculate the total
NOX concentration with a correction for converter efficiency
using equation 7E-8.''
    We requested and received comments on the stratification test in
Method 7E. We will consider the comments and propose changes in a
future rulemaking.

Q. Method 10 of Appendix A-4 of Part 60

    In Method 10, sections 6.2.5 and 8.4.2 are revised, and section
6.2.6 is added to clarify the types of sample tanks allowed for
integrated sampling.

R. Methods 10A and 10B of Appendix A-4 of Part 60

    Methods 10A and 10B are revised to allow the use of sample tanks as
an alternative to flexible bags for sample collection.

S. Method 15 of Appendix A-5 of Part 60

    In Method 15, section 8.3.2 is revised to clarify the calibrations
that represent partial calibration.

T. Method 16C of Appendix A-6 of Part 60

    In Method 16C, section 12.2, equation 16C-1 is revised to replace
Cv (manufacturer certified concentration of a calibration
gas in ppmv SO2) in the denominator with CS (calibration
span in ppmv). The definition of CS is added to the nomenclature in
section 12.1, and the definition of Cv is retained in the
nomenclature in section 12.1 because Cv is in the numerator
of equation 16C-1.

U. Method 18 of Appendix A-6 of Part 60

    In Method 18, section <IP_ADDRESS>.2.3 is removed because the General
Provisions to Part 60 already include a requirement to analyze two
field audit samples as described in section 9.2.

V. Method 25C of Appendix A-7 of Part 60

    In Method 25C, section 9.1 is corrected to reference section 8.4.2
instead of section 8.4.1. Section 11.2 is deleted because the audit
sample analysis is now covered under the General Provisions to Part 60.
The nomenclature is revised in section 12.1, and equation 25C-2 is
revised in section 12.3. Sections 12.4, 12.5, 12.5.1, and 12.5.2 are
added to incorporate equations to correct sample concentrations for
ambient air dilution. In section 12.5.2, the reference to equation 25C-
4 is corrected to 25C-5.

W. Method 26 of Appendix A-8 of Part 60

    In Method 26, section 13.3 is revised to indicate the correct
method detection limit; the equivalent English unit for the metric
quantity is added.

X. Method 26A of Appendix A-8 of Part 60

    In Method 26A, language regarding minimizing chloride interferences
is added to section 4.3. Also in section 4.3, the first sentence
(inadvertently omitted in the proposed rule) is re-inserted.
    Sections 6.1.7 and 8.1.5 are not changed in this final rule. The
language in the proposed rule that revised the required probe and
filter temperature requirements in sections 6.1.7 and 8.1.5 to allow a
lower probe and filter temperature was an error.
    In section 8.1.6, the typographical error, ``. . . between 120 and
134 [deg]C (248 and 275 [deg]F . . .''), is corrected to ``. . .
between 120 and 134 [deg]C (248 and 273 [deg]F . . .'').

Y. Method 29 of Appendix A-8 of Part 60

    In Method 29, section <IP_ADDRESS> is revised to require rinsing
impingers containing permanganate with hydrogen chloride (HCl) to
ensure consistency with the application of Method 29 across various
stationary source categories and because there is evidence that HCl is
needed to release the mercury (Hg) bound in the precipitate from the
permanganate. Sections 10.4 and 10.5 are added to require calibration
of the field balance used to weigh impingers and to require a
multipoint calibration of the analytical balance. In section 10.4, the
proposed language is revised to allow the use of a Class 6 tolerance
weight (or better) in lieu of the proposed Class 3 (or better)
tolerance weight for checking the field balance accuracy because the
calibration weight does not need to be any better than one-half of the
tolerance for the measurement.

Z. Method 30A of Appendix A-8 of Part 60

    In Method 30A, the heading of section 8.1 is changed from ``Sample
Point Selection'' to ``Selection of Sampling Sites and Sampling
Points.''

AA. Method 30B of Appendix A-8 of Part 60

    In Method 30B, the heading of section 8.1 is changed from ``Sample
Point Selection'' to ``Selection of Sampling Sites and Sampling
Points.'' In section <IP_ADDRESS>, the reference to ASTM WK223 is changed to
ASTM D6911-15, and the last two sentences in this section
(inadvertently omitted in the proposed rule) are re-inserted.

BB. Appendix B to Part 60--Performance Specifications

    In the index to appendix B to part 60, Performance Specification
16--Specifications and Test Procedures for Predictive Emission
Monitoring Systems in Stationary Sources is added.

CC. Performance Specification 1 of Appendix B of Part 60

    In Performance Specification 1, paragraph 8.1(2)(i) is revised in
order to not limit the location of a continuous opacity monitoring
system (COMS) to a point at least four duct diameters downstream and
two duct diameters upstream from a control device or flow disturbance.
Paragraph 8.1(2)(i) refers to paragraphs 8.1(2)(ii) and 8.1(2)(iii) for
additional options.

DD. Performance Specification 2 of Appendix B of Part 60

    In Performance Specification 2, the definition of span value is
revised in section 3.11. The sentence, ``For spans less than 500 ppm,
the span value may either be rounded upward to the next highest
multiple of 10 ppm, or to the next highest multiple of 100 ppm such
that the equivalent emissions concentration is not less than 30 percent
of the selected span value.'', is added to section 3.11. Also, in
section 6.1.1, the data recorder language is revised. In section 6.1.2,
the term ``high-level'' is changed to ``span'' to be consistent with
the definition of span value discussed above. In section 16.3.2, the
characters ``|dverbar'' are replaced with d which is the average
difference between

responses and the concentration/responses. In section 18, Table 2-2 is
detached from Figure 2-1, and the figure is clearly labeled as
``Calibration Drift Determination.''

EE. Performance Specification 3 of Appendix B of Part 60

    In Performance Specification 3, section 13.2 is revised to clarify
how to calculate relative accuracy. The absolute value symbol is added
to the proposed definition of absolute value of the mean of the
differences.

FF. Performance Specification 4A of Appendix B of Part 60

    In Performance Specification 4A, the response time test procedure
in sections 8.3 and 8.3.1 is revised. In section 8.3.1, the next to the
last sentence is re-worded to ``Repeat the entire procedure until you
have three sets of data to determine the mean upscale and downscale
response times.'' Also, the proposed response time requirement in
section 13.3 is revised to 240 seconds.

GG. Performance Specification 11 of Appendix B of Part 60

    In Performance Specification 11, equations 11-1 and 11-2 are
revised in section 12.1, and the response range is used in lieu of the
upscale value in section 13.1. In section 12.1, the sentence in
paragraph (3) that was inadvertently omitted is re-inserted.

HH. Performance Specification 15 of Appendix B of Part 60

    In Performance Specification 15, the statement, ``An audit sample
is obtained from the Administrator,'' is deleted from paragraph 9.1.2.
Also, in Performance Specification 15, reserved sections 14.0 and 15.0
are added.

II. Performance Specification 16 of Appendix B of Part 60

    In Performance Specification 16, Table 16-1 is changed to be
consistent with conventional statistical applications; the values
listed in the column labelled n-1 (known as degrees of freedom) are
corrected to coincide with standard t-tables, and the footnote is
clarified. Section 12.2.3 is revised for selection of n-1 degrees of
freedom.

JJ. Procedure 2 of Appendix F of Part 60

    In Procedure 2, equations 2-2 and 2-3 in section 12.0 are revised
to correctly define the denominator when calculating calibration drift.
Also, equation 2-4 in section 12.0 is revised to correctly define the
denominator when calculating accuracy. The proposed equation 2-4 is
revised to:
[GRAPHIC] [TIFF OMITTED] TR30AU16.000

KK. General Provisions (Subpart A) of Part 61

    Section 61.13(e)(1)(i) of the General Provisions of Part 61 is
revised to add Methods 30A and 30B to the list of methods not requiring
the use of audit samples.

LL. Method 107 of Appendix B of Part 61

    In Method 107, the term ``Geon'' is deleted from the heading in
section 11.7.3.

MM. General Provisions (Subpart A) of Part 63

    In the General Provisions of Part 63, section 63.7(c)(2)(iii)(A) is
revised to add Methods 30A and 30B to the list of methods not requiring
the use of audit samples.
    Section 63.7(g)(2) is revised to require the reporting of specific
emissions test data in test reports. These data elements are required
regardless of whether the report is submitted electronically or in
paper format. Revisions are made to the list of proposed data elements
to provide clarity and to more appropriately define and limit the
extent of elements reported for each test method included in a test
report. These modifications ensure that emissions test reporting
includes all data necessary to assess and assure the quality of the
reported emissions data and that the reported information appropriately
describes and identifies the specific unit covered by the emissions
test report.

NN. Method 320 of Appendix A of Part 63

    In Method 320, sections 13.1, 13.4, and 13.4.1 are revised to
indicate the correct Method 301 reference.

IV. Public Comments on the Proposed Rule

    Forty-two comment letters were received on the proposed rule. The
public comments and the agency's responses are summarized in the
Summary of Comments and Responses document located in the docket for
this rule. See the ADDRESSES section of this preamble.

V. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review and Executive
Order 13563: Improving Regulation and Regulatory Review

    This action is not a ``significant regulatory action'' under the
terms of Executive Order (E.O.) 12866 (58 FR 51735, October 4, 1993)
and is, therefore, not subject to review under Executive Orders 12866
and 13563 (76 FR 3821, January 21, 2011).

B. Paperwork Reduction Act (PRA)

    This action does not impose an information collection burden under
the PRA. This action does not add information collection requirements;
it makes corrections and updates to existing testing methodology. In
addition, this action clarifies performance testing requirements.

C. Regulatory Flexibility Act (RFA)

    I certify that this action will not have a significant economic
impact on a substantial number of small entities under the RFA. In
making this determination, the impact of concern is any significant
adverse economic impact on small entities. An agency may certify that a
rule will not have a significant economic impact on a substantial
number of small entities if the rule relieves regulatory burden, has no
net burden or otherwise has a positive economic effect on the small
entities subject to the rule. This action will not impose emission
measurement requirements beyond those specified in the current
regulations, nor does it change any emission standard. We have,
therefore, concluded that this action will have no net regulatory
burden for all directly regulated small entities.

D. Unfunded Mandates Reform Act (UMRA)

    This action does not contain any unfunded mandate as described in
UMRA, 2 U.S.C. 1531-1538, and does not significantly or uniquely affect
small governments. The action imposes no enforceable duty on any state,
local or tribal governments or the private sector.

E. Executive Order 13132: Federalism

    This action does not have federalism implications. It will not have
substantial direct effects on the states, on the relationship between
the national government and the states, or on the distribution of power
and responsibilities among the various levels of government.

F. Executive Order 13175: Consultation and Coordination With Indian
Tribal Governments

    This action does not have tribal implications, as specified in
Executive Order 13175. This action simply corrects and updates existing
testing regulations. Thus, Executive Order 13175 does not apply to this
action.

G. Executive Order 13045: Protection of Children From Environmental
Health Risks and Safety Risks

    The EPA interprets Executive Order 13045 as applying only to those
regulatory actions that concern environmental health or safety risks
that the EPA has reason to believe may disproportionately affect
children, per the definition of ``covered regulatory action'' in
section 2-202 of the Executive Order. This action is not subject to
Executive Order 13045 because it does not concern an environmental
health risk or safety risk.

H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution or Use

    This action is not subject to Executive Order 13211, because it is
not a significant regulatory action under Executive Order 12866.

I. National Technology Transfer and Advancement Act (NTTAA) and 1 CFR
Part 51

    This action involves technical standards. The EPA used ASTM D6911-
15 for packaging and shipping samples in Method 30B. The ASTM D6911-15
standard provides guidance on the selection of procedures for proper
packaging and shipment of environmental samples to the laboratory for
analysis to ensure compliance with appropriate regulatory programs and
protection of sample integrity during shipment.
    The EPA used ASTM E617-13 for laboratory weights and precision mass
standards in Methods 4, 5, 5H, 5I, 29, and 202. The ASTM E617-13
standard covers weights and mass standards used in laboratories for
specific classes.
    The ASTM D6911-15 and ASTM E617-13 standards were developed and
adopted by the American Society for Testing and Materials (ASTM). These
standards may be obtained from http://www.astm.org or from the ASTM at
100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

J. Executive Order 12898: Federal Actions To Address Environmental
Justice in Minority Populations and Low-Income Populations

    The EPA believes that this action is not subject to Executive Order
12898 (59 FR 7629, February 16, 1994) because it does not establish an
environmental health or safety standard. This action is a technical
correction to previously promulgated regulatory actions and does not
have an impact on human health or the environment.

K. Congressional Review Act (CRA)

    This action is subject to the CRA, and the EPA will submit a rule
report to each house of the Congress and to the Comptroller General of
the United States. This action is not a ``major rule'' as defined by 5
U.S.C. 804(2).

List of Subjects

40 CFR Part 51

    Environmental protection, Administrative practice and procedure,
Air pollution control, Incorporation by reference, Reporting and
recordkeeping requirements, Volatile organic compounds.

40 CFR Part 60

    Environmental protection, Administrative practice and procedure,
Air pollution control, Incorporation by reference, Volatile organic
compounds.

40 CFR Parts 61 and 63

    Environmental protection, Administrative practice and procedure,
Air pollution control, Reporting and recordkeeping requirements.

    Dated: August 5, 2016.
Gina McCarthy,
Administrator.

    For the reasons stated in the preamble, the Environmental
Protection Agency amends title 40, chapter I of the Code of Federal
Regulations as follows:

PART 51--REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF
IMPLEMENTATION PLANS

0
1. The authority citation for part 51 continues to read as follows:

    Authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.

0
2. Amend appendix M to part 51 as follows:
0
a. Revise section 4.0a.
0
b. Revise section 12.5, equations 8 and 9, in Method 201A.
0
c. In Method 202:
0
i. Add section 3.8.
0
ii. Revise sections <IP_ADDRESS> and 9.10.
0
iii. Add sections 10.3, 10.4, <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS>, and
<IP_ADDRESS>.
0
iv. Add Figure 7 to section 18.0.
    The additions and revisions read as follows:

Appendix M to Part 51--Recommended Test Methods for State
Implementation Plans

* * * * *

4.0 * * *

    a. The source owner, operator, or representative of the tested
facility shall obtain an audit sample, if commercially available,
from an AASP for each test method used for regulatory compliance
purposes. No audit samples are required for the following test
methods: Methods 3A and 3C of appendix A-3 of part 60 of this
chapter, Methods 6C, 7E, 9, and 10 of appendix A-4 of part 60,
Methods 18 and 19 of appendix A-6 of part 60, Methods 20, 22, and
25A of appendix A-7 of part 60, Methods 30A and 30B of appendix A-8
of part 60, and Methods 303, 318, 320, and 321 of appendix A of part
63 of this chapter. If multiple sources at a single facility are
tested during a compliance test event, only one audit sample is
required for each method used during a compliance test. The
compliance authority responsible for the compliance test may waive
the requirement to include an audit sample if they believe that an
audit sample is not necessary. ``Commercially available'' means that
two or more independent AASPs have blind audit samples available for
purchase. If the source owner, operator, or representative cannot
find an audit sample for a specific method, the owner, operator, or
representative shall consult the EPA Web site at the following URL,
http://www.epa.gov/ttn/emc, to confirm whether there is a source
that can supply an audit sample for that method. If the EPA Web site
does not list an available audit sample at least 60 days prior to
the beginning of the compliance test, the source owner, operator, or
representative shall not be required to include an audit sample as
part of the quality assurance program for the compliance test. When
ordering an audit sample, the source owner, operator, or
representative shall give the sample provider an estimate for the
concentration of each pollutant that is emitted by the source or the
estimated concentration of each pollutant based on the permitted
level and the name, address, and phone number of the compliance
authority. The source owner, operator, or representative shall
report the results for the audit sample along with a summary of the
emissions test results for the audited pollutant to the compliance
authority and shall report the results of the audit sample to the
AASP. The source owner, operator, or representative shall make both
reports at the same time and in the same manner or shall report to
the compliance authority first and then report to the AASP. If the
method being audited is a method that allows the samples to be
analyzed in the field, and the tester plans to analyze the samples
in the field, the tester may analyze the audit samples prior to
collecting the emission samples provided a representative of the
compliance authority is present at the testing site. The tester may
request and the compliance authority may grant a waiver to the
requirement that a representative of the compliance authority must
be present at the testing site during the field analysis of an audit
sample. The source owner, operator, or representative may report the
results of the audit sample to the compliance authority and then
report the results of the audit sample to the AASP prior to
collecting any emission samples. The test protocol and final test
report shall document whether an audit sample was ordered and

utilized and the pass/fail results as applicable.
* * * * *

Method 201A--Determination of PM10 and PM2.5
Emissions From Stationary Sources (Constant Sampling Rate Procedure)

* * * * *
    12.5 * * *
    [GRAPHIC] [TIFF OMITTED] TR30AU16.001

* * * * *

Method 202--Dry Impinger Method for Determining Condensable Particulate
Emissions From Stationary Sources

* * * * *
    3.8 ASTM E617-13. ASTM E617-13 ``Standard Specification for
Laboratory Weights and Precisions Mass Standards,'' approved May 1,
2013, was developed and adopted by the American Society for Testing
and Materials (ASTM). The standards cover weights and mass standards
used in laboratories for specific classes. The ASTM E617-13 standard
has been approved for incorporation by reference by the Director of
the Office of the Federal Register in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. The standard may be obtained from http://www.astm.org or from the ASTM at 100 Barr Harbor Drive, P.O. Box
C700, West Conshohocken, PA 19428-2959. All approved material is
available for inspection at EPA WJC West Building, Room 3334, 1301
Constitution Ave. NW., Washington, DC 20460, telephone number 202-
566-1744. It is also available for inspection at the National
Archives and Records Administration (NARA). For information on the
availability of this material at NARA, call<PHONE_NUMBER> or go to
http://www.archives.gov/federal_register/code_of_federal_regulattions/ibr_locations.html.
* * * * *
    <IP_ADDRESS> CPM Container #2, Organic rinses. Follow the water
rinses of the back half of the filterable PM filter holder, probe
extension, condenser, each impinger, and all of the connecting
glassware and front half of the CPM filter with an acetone rinse.
Recover the acetone rinse into a clean, leak-proof container labeled
with test identification and ``CPM Container #2, Organic Rinses.''
Then repeat the entire rinse procedure with two rinses of hexane,
and save the hexane rinses in the same container as the acetone
rinse (CPM Container #2). Mark the liquid level on the jar.
* * * * *
    9.10 Field Train Recovery Blank. You must recover a minimum of
one field train blank for each source category tested at the
facility. You must recover the field train blank after the first or
second run of the test. You must assemble the sampling train as it
will be used for testing. Prior to the purge, you must add 100 ml of
water to the first impinger and record this data on Figure 4. You
must purge the assembled train as described in section 8.5.3. You
must recover field train blank samples as described in section
8.5.4. From the field sample weight, you will subtract the
condensable particulate mass you determine with this blank train or
0.002 g (2.0 mg), whichever is less.
* * * * *
    10.3 Field Balance Calibration Check. Check the calibration of
the balance used to weigh impingers with a weight that is at least
500g or within 50g of a loaded impinger. The weight must be ASTM
E617-13 ``Standard Specification for Laboratory Weights and
Precision Mass Standards'' Class 6 (or better). Daily before use,
the field balance must measure the weight within  0.5g
of the certified mass. If the daily balance calibration check fails,
perform corrective measures and repeat the check before using
balance.
    10.4 Analytical Balance Calibration. Perform a multipoint
calibration (at least five points spanning the operational range) of
the analytical balance before the first use, and semiannually
thereafter. The calibration of the analytical balance must be
conducted using ASTM E617-13 ``Standard Specification for Laboratory
Weights and Precision Mass Standards'' Class 2 (or better) tolerance
weights. Audit the balance each day it is used for gravimetric
measurements by weighing at least one ASTM E617-13 Class 2 tolerance
(or better) calibration weight that corresponds to 50 to 150 percent
of the weight of one filter or between 1g and 5g. If the scale
cannot reproduce the value of the calibration weight to within 0.5mg
of the certified mass, perform corrective measures, and conduct the
multipoint calibration before use.
* * * * *
    <IP_ADDRESS> Determine the inorganic fraction weight. Transfer the
aqueous fraction from the extraction to a clean 500-ml or smaller
beaker. Evaporate to no less than 10 ml liquid on a hot plate or in
the oven at 105 [deg]C and allow to dry at room temperature (not to
exceed 30 [deg]C (85 [deg]F)). You must ensure that water and
volatile acids have completely evaporated before neutralizing
nonvolatile acids in the sample. Following evaporation, desiccate
the residue for 24 hours in a desiccator containing anhydrous
calcium sulfate. Weigh at intervals of at least 6 hours to a
constant weight. (See section 3.0 for a definition of constant
weight.) Report results to the nearest 0.1 mg on the CPM Work Table
(see Figure 6 of section 18) and proceed directly to section 11.2.3.
If the residue cannot be weighed to constant weight, re-dissolve the
residue in 100 ml of deionized distilled ultra-filtered water that
contains 1 ppmw (1 mg/L) residual mass or less and continue to
section <IP_ADDRESS>.
    <IP_ADDRESS> Use titration to neutralize acid in the sample and
remove water of hydration. If used, calibrate the pH meter with the
neutral and acid buffer solutions. Then titrate the sample with 0.1N
NH4OH to a pH of 7.0, as indicated by the pH meter or
colorimetric indicator. Record the volume of titrant used on the CPM
Work Table (see Figure 6 of section 18).
    <IP_ADDRESS> Using a hot plate or an oven at 105 [deg]C, evaporate
the aqueous phase to approximately 10 ml. Quantitatively transfer
the beaker contents to a clean, 50-ml pre-tared weighing tin and
evaporate to dryness at room temperature (not to exceed 30 [deg]C
(85 [deg]F)) and pressure in a laboratory hood. Following
evaporation, desiccate the residue for 24 hours in a desiccator
containing

anhydrous calcium sulfate. Weigh at intervals of at least 6 hours to
a constant weight. (See section 3.0 for a definition of constant
weight.) Report results to the nearest 0.1 mg on the CPM Work Table
(see Figure 6 of section 18).
    <IP_ADDRESS> Calculate the correction factor to subtract the
NH4+ retained in the sample using Equation 1
in section 12.
* * * * *

18.0 Tables, Diagrams, Flowcharts and Validation Data

* * * * *
BILLING CODE 6560-50-C
[GRAPHIC] [TIFF OMITTED] TR30AU16.002

BILLING CODE 6560-50-P
* * * * *

0
3. Revise sections 3.3 and 5.1.3 of appendix P to part 51 to read as
follows:

Appendix P to Part 51--Minimum Emission Monitoring Requirements

* * * * *
    3.3 Calibration Gases. For nitrogen oxides monitoring systems
installed on fossil fuel-fired steam generators, the pollutant gas
used to prepare calibration gas mixtures (section 6.1, Performance
Specification 2, appendix B, part 60 of this chapter) shall be
nitric oxide (NO). For nitrogen oxides monitoring systems

installed on nitric acid plants, the pollutant gas used to prepare
calibration gas mixtures (section 6.1, Performance Specification 2,
appendix B, part 60 of this chapter) shall be nitrogen dioxide
(NO2). These gases shall also be used for daily checks
under paragraph 3.7 of this appendix as applicable. For sulfur
dioxide monitoring systems installed on fossil fuel-fired steam
generators or sulfuric acid plants, the pollutant gas used to
prepare calibration gas mixtures (section 6.1, Performance
Specification 2, appendix B, part 60 of this chapter) shall be
sulfur dioxide (SO2). Span and zero gases should be
traceable to National Bureau of Standards reference gases whenever
these reference gases are available. Every 6 months from date of
manufacture, span and zero gases shall be reanalyzed by conducting
triplicate analyses using the reference methods in appendix A, part
60 of this chapter as follows: for SO2, use Reference
Method 6; for nitrogen oxides, use Reference Method 7; and for
carbon dioxide or oxygen, use Reference Method 3. The gases may be
analyzed at less frequent intervals if longer shelf lives are
guaranteed by the manufacturer.
* * * * *
    5.1.3 The values used in the equations under paragraph 5.1 are
derived as follows:
    E = pollutant emission, g/million cal (lb/million BTU),
    C = pollutant concentration, g/dscm (lb/dscf), determined by
multiplying the average concentration (ppm) for each hourly period
by 4.16 x 10-5 M g/dscm per ppm (2.64 x 10-9 M
lb/dscf per ppm) where M = pollutant molecular weight, g/g-mole (lb/
lb-mole). M = 64 for sulfur dioxide and 46 for oxides of nitrogen.
    %O2, %CO2 = Oxygen or carbon dioxide
volume (expressed as percent) determined with equipment specified
under paragraphs 3.1.4 and 3.1.5 of this appendix.
* * * * *

PART 60--STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES

0
4. The authority citation for part 60 continues to read as follows:

    Authority: 42 U.S.C. 7401 et. seq.

0
5. In Sec.  60.8, revise paragraph (f) to read as follows:

Sec.  60.8   Performance tests.

* * * * *
    (f) Unless otherwise specified in the applicable subpart, each
performance test shall consist of three separate runs using the
applicable test method.
    (1) Each run shall be conducted for the time and under the
conditions specified in the applicable standard. For the purpose of
determining compliance with an applicable standard, the arithmetic
means of results of the three runs shall apply. In the event that a
sample is accidentally lost or conditions occur in which one of the
three runs must be discontinued because of forced shutdown, failure of
an irreplaceable portion of the sample train, extreme meteorological
conditions, or other circumstances, beyond the owner or operator's
control, compliance may, upon the Administrator's approval, be
determined using the arithmetic mean of the results of the two other
runs.
    (2) Contents of report (electronic or paper submitted copy). Unless
otherwise specified in a relevant standard or test method, or as
otherwise approved by the Administrator in writing, the report for a
performance test shall include the elements identified in paragraphs
(f)(2)(i) through (vi) of this section.
    (i) General identification information for the facility including a
mailing address, the physical address, the owner or operator or
responsible official (where applicable) and his/her email address, and
the appropriate Federal Registry System (FRS) number for the facility.
    (ii) Purpose of the test including the applicable regulation(s)
requiring the test, the pollutant(s) and other parameters being
measured, the applicable emission standard and any process parameter
component, and a brief process description.
    (iii) Description of the emission unit tested including fuel
burned, control devices, and vent characteristics; the appropriate
source classification code (SCC); the permitted maximum process rate
(where applicable); and the sampling location.
    (iv) Description of sampling and analysis procedures used and any
modifications to standard procedures, quality assurance procedures and
results, record of process operating conditions that demonstrate the
applicable test conditions are met, and values for any operating
parameters for which limits were being set during the test.
    (v) Where a test method requires you record or report, the
following shall be included: Record of preparation of standards, record
of calibrations, raw data sheets for field sampling, raw data sheets
for field and laboratory analyses, chain-of-custody documentation, and
example calculations for reported results.
    (vi) Identification of the company conducting the performance test
including the primary office address, telephone number, and the contact
for this test program including his/her email address.
* * * * *

0
6. In Sec.  60.17:
0
a. Revise paragraph (h)(180).
0
b. Redesignate paragraphs (h)(200) through (h)(206) as paragraphs
(h)(202) through (h)(208).
0
c. Redesignate paragraphs (h)(190) through (h)(199) as (h)(191) through
(h)(200).
0
d. Add new paragraphs (h)(190) and (h)(201).
    The additions and revisions read as follows:

Sec.  60.17  Incorporations by reference.

* * * * *
    (h) * * *
    (180) ASTM D6348-03, Standard Test Method for Determination of
Gaseous Compounds by Extractive Direct Interface Fourier Transform
Infrared (FTIR) Spectroscopy, (Approved October 1, 2003), IBR approved
for Sec.  60.73a(b), table 7 to subpart IIII, table 2 to subpart JJJJ,
and Sec.  60.4245(d).
* * * * *
    (190) ASTM D6911-15, Standard Guide for Packaging and Shipping
Environmental Samples for Laboratory Analysis, approved January 15,
2015, IBR approved for appendix A-8: Method 30B.
* * * * *
    (201) ASTM E617-13, Standard Specification for Laboratory Weights
and Precision Mass Standards, approved May 1, 2013, IBR approved for
appendix A-3: Methods 4, 5, 5H, 5I, and appendix A-8: Method 29.
* * * * *

Subpart JJJJ--Standards of Performance for Stationary Spark
Ignition Internal Combustion Engines

0
7. Revise Sec.  60.4245(d) to read as follows:

Sec.  60.4245  What are my notification, reporting, and recordkeeping
requirements if I am an owner or operator of a stationary SI internal
combustion engine?

* * * * *
    (d) Owners and operators of stationary SI ICE that are subject to
performance testing must submit a copy of each performance test as
conducted in Sec.  60.4244 within 60 days after the test has been
completed. Performance test reports using EPA Method 18, EPA Method
320, or ASTM D6348-03 (incorporated by reference--see 40 CFR 60.17) to
measure VOC require reporting of all QA/QC data. For Method 18, report
results from sections 8.4 and <IP_ADDRESS>; for Method 320, report results
from sections 8.6.2, 9.0, and 13.0; and for ASTM D6348-03 report
results of all QA/QC procedures in Annexes 1-7.
* * * * *

0
8. Revise Table 2 to subpart JJJJ of part 60 to read as follows:

                     Table 2 to Subpart JJJJ of Part 60--Requirements for Performance Tests
  [As stated in Sec.   60.4244, you must comply with the following requirements for performance tests within 10
                          percent of 100 percent peak (or the highest achievable) load]
----------------------------------------------------------------------------------------------------------------
                                   Complying with
            For each              the requirement        You must            Using           According to the
                                         to                                               following requirements
----------------------------------------------------------------------------------------------------------------
1. Stationary SI internal        a. limit the       i. Select the      (1) Method 1 or    (a) Alternatively, for
 combustion engine                concentration of   sampling port      1A of 40 CFR       NOX, O2, and moisture
 demonstrating compliance         NOX in the         location and the   part 60,           measurement, ducts
 according to Sec.   60.4244.     stationary SI      number/location    appendix A-1, if   <=6 inches in
                                  internal           of traverse        measuring flow     diameter may be
                                  combustion         points at the      rate.              sampled at a single
                                  engine exhaust.    exhaust of the                        point located at the
                                                     stationary                            duct centroid and
                                                     internal                              ducts >6 and <=12
                                                     combustion                            inches in diameter
                                                     engine;.                              may be sampled at 3
                                                                                traverse points
                                                                                located at 16.7,
                                                                                50.0, and 83.3% of
                                                                                the measurement line
                                                                                (`3-point long
                                                                                line'). If the duct
                                                                                is >12 inches in
                                                                                diameter and the
                                                                                sampling port
                                                                                location meets the
                                                                                two and half-diameter
                                                                                criterion of Section
                                                                                11.1.1 of Method 1 of
                                                                                40 CFR part 60,
                                                                                Appendix A, the duct
                                                                                may be sampled at `3-
                                                                                point long line';
                                                                                otherwise, conduct
                                                                                the stratification
                                                                                testing and select
                                                                                sampling points
                                                                                according to Section
                                                                                8.1.2 of Method 7E of
                                                                                40 CFR part 60,
                                                                                Appendix A.
                                                    ii. Determine the  (2) Method 3, 3A,  (b) Measurements to
                                                     O2 concentration   or 3B b of 40      determine O2
                                                     of the             CFR part 60,       concentration must be
                                                     stationary         appendix A-2 or    made at the same time
                                                     internal           ASTM Method        as the measurements
                                                     combustion         D6522-00           for NOX
                                                     engine exhaust     (Reapproved        concentration.
                                                     at the sampling    2005) a d.
                                                     port location;.
                                                    iii. If            (3) Method 2 or
                                                     necessary,         2C of 40 CFR
                                                     determine the      part 60,
                                                     exhaust flowrate   appendix A-1 or
                                                     of the             Method 19 of 40
                                                     stationary         CFR part 60,
                                                     internal           appendix A-7.
                                                     combustion
                                                     engine exhaust;.
                                                    iv. If necessary,  (4) Method 4 of    (c) Measurements to
                                                     measure moisture   40 CFR part 60,    determine moisture
                                                     content of the     appendix A-3,      must be made at the
                                                     stationary         Method 320 of 40   same time as the
                                                     internal           CFR part 63,       measurement for NOX
                                                     combustion         appendix A e, or   concentration.
                                                     engine exhaust     ASTM Method
                                                     at the sampling    D6348-03 d e.
                                                     port location;
                                                     and.
                                                    v. Measure NOX at  (5) Method 7E of   (d) Results of this
                                                     the exhaust of     40 CFR part 60,    test consist of the
                                                     the stationary     appendix A-4,      average of the three
                                                     internal           ASTM Method        1-hour or longer
                                                     combustion         D6522-00           runs.
                                                     engine; if using   (Reapproved
                                                     a control          2005) a d,
                                                     device, the        Method 320 of 40
                                                     sampling site      CFR part 63,
                                                     must be located    appendix A e, or
                                                     at the outlet of   ASTM Method
                                                     the control        D6348-03 d e.
                                                     device.
                                 b. limit the       i. Select the      (1) Method 1 or    (a) Alternatively, for
                                  concentration of   sampling port      1A of 40 CFR       CO, O2, and moisture
                                  CO in the          location and the   part 60,           measurement, ducts
                                  stationary SI      number/location    appendix A-1, if   <=6 inches in
                                  internal           of traverse        measuring flow     diameter may be
                                  combustion         points at the      rate.              sampled at a single
                                  engine exhaust.    exhaust of the                        point located at the
                                                     stationary                            duct centroid and
                                                     internal                              ducts >6 and <=12
                                                     combustion                            inches in diameter
                                                     engine;.                              may be sampled at 3
                                                                                traverse points
                                                                                located at 16.7,
                                                                                50.0, and 83.3% of
                                                                                the measurement line
                                                                                (`3-point long
                                                                                line'). If the duct
                                                                                is >12 inches in
                                                                                diameter and the
                                                                                sampling port
                                                                                location meets the
                                                                                two and half-diameter
                                                                                criterion of Section
                                                                                11.1.1 of Method 1 of
                                                                                40 CFR part 60,
                                                                                Appendix A, the duct
                                                                                may be sampled at `3-
                                                                                point long line';
                                                                                otherwise, conduct
                                                                                the stratification
                                                                                testing and select
                                                                                sampling points
                                                                                according to Section
                                                                                8.1.2 of Method 7E of
                                                                                40 CFR part 60,
                                                                                Appendix A.

                                                    ii. Determine the  (2) Method 3, 3A,  (b) Measurements to
                                                     O2 concentration   or 3B b of 40      determine O2
                                                     of the             CFR part 60,       concentration must be
                                                     stationary         appendix A-2 or    made at the same time
                                                     internal           ASTM Method        as the measurements
                                                     combustion         D6522-00           for CO concentration.
                                                     engine exhaust     (Reapproved
                                                     at the sampling    2005) a d.
                                                     port location;.
                                                    iii. If            (3) Method 2 or
                                                     necessary,         2C of 40 CFR 60,
                                                     determine the      appendix A-1 or
                                                     exhaust flowrate   Method 19 of 40
                                                     of the             CFR part 60,
                                                     stationary         appendix A-7.
                                                     internal
                                                     combustion
                                                     engine exhaust;.
                                                    iv. If necessary,  (4) Method 4 of    (c) Measurements to
                                                     measure moisture   40 CFR part 60,    determine moisture
                                                     content of the     appendix A-3,      must be made at the
                                                     stationary         Method 320 of 40   same time as the
                                                     internal           CFR part 63,       measurement for CO
                                                     combustion         appendix A e, or   concentration.
                                                     engine exhaust     ASTM Method
                                                     at the sampling    D6348-03 d e.
                                                     port location;
                                                     and.
                                                    v. Measure CO at   (5) Method 10 of   (d) Results of this
                                                     the exhaust of     40 CFR part 60,    test consist of the
                                                     the stationary     appendix A4,       average of the three
                                                     internal           ASTM Method        1-hour or longer
                                                     combustion         D6522-00           runs.
                                                     engine; if using   (Reapproved
                                                     a control          2005) a d e,
                                                     device, the        Method 320 of 40
                                                     sampling site      CFR part 63,
                                                     must be located    appendix A \e\,
                                                     at the outlet of   or ASTM Method
                                                     the control        D6348-03 d e.
                                                     device.
                                 c. limit the       i. Select the      (1) Method 1 or    (a) Alternatively, for
                                  concentration of   sampling port      1A of 40 CFR       VOC, O2, and moisture
                                  VOC in the         location and the   part 60,           measurement, ducts
                                  stationary SI      number/location    appendix A-1, if   <=6 inches in
                                  internal           of traverse        measuring flow     diameter may be
                                  combustion         points at the      rate.              sampled at a single
                                  engine exhaust.    exhaust of the                        point located at the
                                                     stationary                            duct centroid and
                                                     internal                              ducts >6 and <=12
                                                     combustion                            inches in diameter
                                                     engine;.                              may be sampled at 3
                                                                                traverse points
                                                                                located at 16.7,
                                                                                50.0, and 83.3% of
                                                                                the measurement line
                                                                                (`3-point long
                                                                                line'). If the duct
                                                                                is >12 inches in
                                                                                diameter and the
                                                                                sampling port
                                                                                location meets the
                                                                                two and half-diameter
                                                                                criterion of Section
                                                                                11.1.1 of Method 1 of
                                                                                40 CFR part 60,
                                                                                Appendix A, the duct
                                                                                may be sampled at `3-
                                                                                point long line';
                                                                                otherwise, conduct
                                                                                the stratification
                                                                                testing and select
                                                                                sampling points
                                                                                according to Section
                                                                                8.1.2 of Method 7E of
                                                                                40 CFR part 60,
                                                                                Appendix A.
                                                    ii. Determine the  (2) Method 3, 3A,  (b) Measurements to
                                                     O2 concentration   or 3B b of 40      determine O2
                                                     of the             CFR part 60,       concentration must be
                                                     stationary         appendix A-2 or    made at the same time
                                                     internal           ASTM Method        as the measurements
                                                     combustion         D6522-00           for VOC
                                                     engine exhaust     (Reapproved        concentration.
                                                     at the sampling    2005) a d.
                                                     port location;.
                                                    iii. If            (3) Method 2 or
                                                     necessary,         2C of 40 CFR 60,
                                                     determine the      appendix A-1 or
                                                     exhaust flowrate   Method 19 of 40
                                                     of the             CFR part 60,
                                                     stationary         appendix A-7.
                                                     internal
                                                     combustion
                                                     engine exhaust;.
                                                    iv. If necessary,  (4) Method 4 of    (c) Measurements to
                                                     measure moisture   40 CFR part 60,    determine moisture
                                                     content of the     appendix A-3,      must be made at the
                                                     stationary         Method 320 of 40   same time as the
                                                     internal           CFR part 63,       measurement for VOC
                                                     combustion         appendix A e, or   concentration.
                                                     engine exhaust     ASTM Method
                                                     at the sampling    D6348-03 d e.
                                                     port location;
                                                     and.

                                                    v. Measure VOC at  (5) Methods 25A    (d) Results of this
                                                     the exhaust of     and 18 of 40 CFR   test consist of the
                                                     the stationary     part 60,           average of the three
                                                     internal           appendices A-6     1-hour or longer
                                                     combustion         and A-7, Method    runs.
                                                     engine; if using   25A with the use
                                                     a control          of a hydrocarbon
                                                     device, the        cutter as
                                                     sampling site      described in 40
                                                     must be located    CFR 1065.265,
                                                     at the outlet of   Method 18 of 40
                                                     the control        CFR part 60,
                                                     device.            appendix A-6 c
                                                                        e, Method 320 of
                                                                        40 CFR part 63,
                                                                        appendix A e, or
                                                                        ASTM Method
                                                                        D6348-03 d e.
----------------------------------------------------------------------------------------------------------------
a Also, you may petition the Administrator for approval to use alternative methods for portable analyzer.
b You may use ASME PTC 19.10-1981, Flue and Exhaust Gas Analyses, for measuring the O2 content of the exhaust
  gas as an alternative to EPA Method 3B. AMSE PTC 19.10-1981 incorporated by reference, see 40 CFR 60.17
c You may use EPA Method 18 of 40 CFR part 60, appendix A-6, provided that you conduct an adequate pre-survey
  test prior to the emissions test, such as the one described in OTM 11 on EPA's Web site (http://www.epa.gov/ttn/emc/prelim/otm11.pdf).
d Incorporated by reference; see 40 CFR 60.17.
e You must meet the requirements in Sec.   60.4245(d).

0
9. In appendix A-1 to part 60:
0
a. Revise section <IP_ADDRESS> in Method 1.
0
b. Remove Figure 1-2 in section 17.0 after the table entitled ``Table
1-1 Cross-Section Layout for Rectangular Stacks'' in Method 1.
0
c. Revise sections 6.7, <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS>.3,
<IP_ADDRESS>, and Figure 2-10 in section 17.0 in Method 2.
    The revisions read as follows:

Appendix A-1 to Part 60--Test Methods 1 Through 2F

* * * * *

Method 1-Sample and Velocity Traverses for Stationary Sources

* * * * *
    <IP_ADDRESS> When the eight- and two-diameter criterion cannot be
met, the minimum number of traverse points is determined from Figure
1-1. Before referring to the figure, however, determine the
distances from the measurement site to the nearest upstream and
downstream disturbances, and divide each distance by the stack
diameter or equivalent diameter, to determine the distance in terms
of the number of duct diameters. Then, determine from Figure 1-1 the
minimum number of traverse points that corresponds:
    (1) To the number of duct diameters upstream; and
    (2) To the number of diameters downstream. Select the higher of
the two minimum numbers of traverse points, or a greater value, so
that for circular stacks, the number is a multiple of 4, and for
rectangular stacks, the number is one of those shown in Table 1-1.
* * * * *

Method 2--Determination of Stack Gas Velocity and Volumetric Flow Rate
(Type S Pitot Tube)

* * * * *
    6.7 Calibration Pitot Tube. Calibration of the Type S pitot tube
requires a standard pitot tube for a reference. When calibration of
the Type S pitot tube is necessary (see Section 10.1), a standard
pitot tube shall be used for a reference. The standard pitot tube
shall, preferably, have a known coefficient, obtained directly from
the National Institute of Standards and Technology (NIST),
Gaithersburg, MD 20899,<PHONE_NUMBER>; or by calibration against
another standard pitot tube with a NIST-traceable coefficient.
Alternatively, a standard pitot tube designed according to the
criteria given in sections 6.7.1 through 6.7.5 below and illustrated
in Figure 2-5 (see also References 7, 8, and 17 in section 17.0) may
be used. Pitot tubes designed according to these specifications will
have baseline coefficients of 0.99 0.01.
* * * * *
    <IP_ADDRESS> The flow system shall have the capacity to generate a
test-section velocity around 910 m/min (3,000 ft/min). This velocity
must be constant with time to guarantee constant and steady flow
during the entire period of calibration. A centrifugal fan is
recommended for this purpose, as no flow rate adjustment for back
pressure of the fan is allowed during the calibration process. Note
that Type S pitot tube coefficients obtained by single-velocity
calibration at 910 m/min (3,000 ft/min) will generally be valid to
3 percent for the measurement of velocities above 300 m/
min (1,000 ft/min) and to 6 percent for the measurement
of velocities between 180 and 300 m/min (600 and 1,000 ft/min). If a
more precise correlation between the pitot tube coefficient (Cp) and
velocity is desired, the flow system should have the capacity to
generate at least four distinct, time-invariant test-section
velocities covering the velocity range from 180 to 1,500 m/min (600
to 5,000 ft/min), and calibration data shall be taken at regular
velocity intervals over this range (see References 9 and 14 in
section 17.0 for details).
* * * * *
    <IP_ADDRESS> Read [Delta]pstd, and record its value in a
data table similar to the one shown in Figure 2-9. Remove the
standard pitot tube from the duct, and disconnect it from the
manometer. Seal the standard entry port. Make no adjustment to the
fan speed or other wind tunnel volumetric flow control device
between this reading and the corresponding Type S pitot reading.
* * * * *
    <IP_ADDRESS> Repeat Steps <IP_ADDRESS> through <IP_ADDRESS> until three
pairs of [Delta]p readings have been obtained for the A side of the
Type S pitot tube, with all the paired observations conducted at a
constant fan speed (no changes to fan velocity between observed
readings).
* * * * *
    <IP_ADDRESS>.3 For Type S pitot tube combinations with complete
probe assemblies, the calibration point should be located at or near
the center of the duct; however, insertion of a probe sheath into a
small duct may cause significant cross-sectional area interference
and blockage and yield incorrect coefficient values (Reference 9 in
section 17.0). Therefore, to minimize the blockage effect, the
calibration point may be a few inches off-center if necessary, but
no closer to the outer wall of the wind tunnel than 4 inches. The
maximum allowable blockage, as determined by a projected-area model
of the probe sheath, is 2 percent or less of the duct cross-
sectional area (Figure

2-10a). If the pitot and/or probe assembly blocks more than 2
percent of the cross-sectional area at an insertion point only 4
inches inside the wind tunnel, the diameter of the wind tunnel must
be increased.
* * * * *
    <IP_ADDRESS> For a probe assembly constructed such that its pitot
tube is always used in the same orientation, only one side of the
pitot tube needs to be calibrated (the side which will face the
flow). The pitot tube must still meet the alignment specifications
of Figure 2-2 or 2-3, however, and must have an average deviation
([sigma]) value of 0.01 or less (see section 12.4.4).
* * * * *

17.0 Tables, Diagrams, Flowcharts, and Validation Data

* * * * *
[GRAPHIC] [TIFF OMITTED] TR30AU16.003

* * * * *

0
10. In appendix A-2 to part 60:
0
a. Revise sections 6.11.1, 6.11.2, 10.6.6, and 10.6.8 in Method 2G.
0
b. Revise section 6.3 in Method 3C.
0
c. Add sections 6.3.1, 6.3.2, 6.3.3, 6.3.4, and 6.3.5 in Method 3C.
    The revisions and additions read as follows:

Appendix A-2 to Part 60--Test Methods 2G Through 3C

* * * * *

Method 2G--Determination of Stack Gas Velocity and Volumetric Flow Rate
With Two-Dimensional Probes

* * * * *
    6.11.1 Test section cross-sectional area. The flowing gas stream
shall be confined within a circular, rectangular, or elliptical
duct. The cross-sectional area of the tunnel must be large enough to
ensure fully developed flow in the presence of both the calibration
pitot tube and the tested probe. The calibration site, or ``test
section,'' of the wind tunnel shall have a minimum diameter of 30.5
cm (12 in.) for circular or elliptical duct cross-sections or a
minimum width of 30.5 cm (12 in.) on the shorter side for
rectangular cross-sections. Wind tunnels shall meet the probe
blockage provisions of this section and the qualification
requirements prescribed in section 10.1. The projected area of the
portion of the probe head, shaft, and attached devices inside the
wind tunnel during calibration shall represent no more than 2
percent of the cross-sectional area of the tunnel. If the pitot and/
or probe assembly blocks more than 2 percent of the cross-sectional
area at an insertion point only 4 inches inside the wind tunnel, the
diameter of the wind tunnel must be increased.
    6.11.2 Velocity range and stability. The wind tunnel should be
capable of achieving and maintaining a constant and steady velocity
between 6.1 m/sec and 30.5 m/sec (20 ft/sec and 100 ft/sec) for the
entire calibration period for each selected calibration velocity.
The wind tunnel shall produce fully developed flow patterns that are
stable and parallel to the axis of the duct in the test section.
* * * * *
    10.6.6 Read the differential pressure from the calibration pitot
tube ([Delta]Pstd), and record its value. Read the
barometric pressure to within 2.5 mm Hg (0.1
in. Hg) and the temperature in the wind tunnel to within 0.6 [deg]C
(1 [deg]F). Record these values on a data form similar to Table 2G-
8. Record the rotational speed of the fan or indicator of wind
tunnel velocity control (damper setting, variac rheostat, etc.) and
make no adjustment to fan speed or wind tunnel velocity control
between this observation and the Type S probe reading.
* * * * *
    10.6.8 Take paired differential pressure measurements with the
calibration pitot tube and tested probe (according to sections
10.6.6 and 10.6.7). The paired measurements in each replicate can be
made either simultaneously (i.e., with both probes in the wind
tunnel) or by alternating the measurements of the two probes (i.e.,
with only one probe at a time in the wind tunnel). Adjustments made
to the fan speed or other changes to the system designed to change
the air flow velocity of the wind tunnel between observation of the
calibration pitot tube ([Delta]Pstd) and the Type S pitot
tube invalidates the reading and the observation must be repeated.
* * * * *

Method 3C--Determination of Carbon Dioxide, Methane, Nitrogen, and
Oxygen From Stationary Sources

* * * * *

    6.3 Analyzer Linearity Check and Calibration. Perform this test
before sample analysis.
    6.3.1 Using the gas mixtures in section 5.1, verify the detector
linearity over the range of suspected sample concentrations with at
least three concentrations per compound of interest. This initial
check may also serve as the initial instrument calibration.
    6.3.2 You may extend the use of the analyzer calibration by
performing a single-point calibration verification. Calibration
verifications shall be performed by triplicate injections of a
single-point standard gas. The concentration of the single-point
calibration must either be at the midpoint of the calibration curve
or at approximately the source emission concentration measured
during operation of the analyzer.
    6.3.3 Triplicate injections must agree within 5 percent of their
mean, and the average calibration verification point must agree
within 10 percent of the initial calibration response factor. If
these calibration verification criteria are not met, the initial
calibration described in section 6.3.1, using at least three
concentrations, must be repeated before analysis of samples can
continue.
    6.3.4 For each instrument calibration, record the carrier and
detector flow rates, detector filament and block temperatures,
attenuation factor, injection time, chart speed, sample loop volume,
and component concentrations.
    6.3.5 Plot a linear regression of the standard concentrations
versus area values to obtain the response factor of each compound.
Alternatively, response factors of uncorrected component
concentrations (wet basis) may be generated using instrumental
integration.

    Note: Peak height may be used instead of peak area throughout
this method.

* * * * *

0
11. In appendix A-3 to part 60:
0
a. Add sections 10.3 and 12.2.5 in Method 4.
0
b. Revise section 16.4 in Method 4.
0
c. Revise sections <IP_ADDRESS> and <IP_ADDRESS>.5 in Method 5.
0
d. Add sections 10.7 and 10.8 in Method 5.
0
e. Add sections 10.4 and 10.5 in Method 5H.
0
f. Add sections 10.1 and 10.2 in Method 5I.
    The revisions and additions read as follows:

Appendix A-3 to Part 60-Test Methods 4 Through 5I

* * * * *

Method 4--Determination of Moisture Content in Stack Gases

* * * * *
    10.3 Field Balance Calibration Check. Check the calibration of
the balance used to weigh impingers with a weight that is at least
500g or within 50g of a loaded impinger. The weight must be ASTM
E617-13 ``Standard Specification for Laboratory Weights and
Precision Mass Standards'' (incorporated by reference-see 40 CFR
60.17) Class 6 (or better). Daily, before use, the field balance
must measure the weight within  0.5g of the certified
mass. If the daily balance calibration check fails, perform
corrective measures and repeat the check before using balance.
* * * * *
    12.2.5 Using F-factors to determine approximate moisture for
estimating moisture content where no wet scrubber is being used, for
the purpose of determining isokinetic sampling rate settings with no
fuel sample, is acceptable using the average Fc or
Fd factor from Method 19 (see Method 19, section 12.3.1).
If this option is selected, calculate the approximate moisture as
follows:

Bws = BH + BA+ BF

Where:

BA = Mole Fraction of moisture in the ambient air.
[GRAPHIC] [TIFF OMITTED] TR30AU16.004

Bws = Mole fraction of moisture in the stack gas.
Fd = Volume of dry combustion components per unit of heat
content at 0 percent oxygen, dscf/10\6\.
    Btu (scm/J). See Table 19-2 in Method 19.
Fw = Volume of wet combustion components per unit of heat
content at 0 percent oxygen, wet.
    scf/10\6\ Btu (scm/J). See Table 19-2 in Method 19.
%RH = Percent relative humidity (calibrated hygrometer acceptable),
percent.
PBar = Barometric pressure, in. Hg.
T = Ambient temperature, [deg]F.
W = Percent free water by weight, percent.
O2 = Percent oxygen in stack gas, dry basis, percent.
* * * * *
    16.4 Using F-factors to determine moisture is an acceptable
alternative to Method 4 for a combustion stack not using a scrubber,
and where a fuel sample is taken during the test run and analyzed
for development of an Fd factor (see Method 19, section
12.3.2), and where stack O2 content is measured by Method
3A or 3B during each test run. If this option is selected, calculate
the moisture content as follows:

Bws = BH + BA + BF

Where:

BA = Mole fraction of moisture in the ambient air.

[GRAPHIC] [TIFF OMITTED] TR30AU16.005

    Note: Values of BA should be between 0.00 and 0.06
with common values being about 0.015.

BF = Mole fraction of moisture from free water in the
fuel.
[GRAPHIC] [TIFF OMITTED] TR30AU16.006

    Note: Free water in fuel is minimal for distillate oil and
gases, such as propane and natural gas, so this step may be omitted
for those fuels.

BH = Mole fraction of moisture from the hydrogen in the
fuel.
[GRAPHIC] [TIFF OMITTED] TR30AU16.007

Bws = Mole fraction of moisture in the stack gas.
Fd = Volume of dry combustion components per unit of heat
content at 0 percent oxygen, dscf/10\6\ Btu (scm/J). Develop a test
specific Fd value using an integrated fuel sample from
each test run and Equation 19-13 in section 12.3.2 of Method 19.
Fw = Volume of wet combustion components per unit of heat
content at 0 percent oxygen, wet scf/10\6\ Btu (scm/J). Develop a
test specific Fw value using an integrated fuel sample
from each test run and Equation 19-14 in section 12.3.2 of Method
19.
%RH = Percent relative humidity (calibrated hygrometer acceptable),
percent.
PBar = Barometric pressure, in. Hg.
T = Ambient temperature, [deg]F.
W = Percent free water by weight, percent.
O2 = Percent oxygen in stack gas, dry basis, percent.
* * * * *

Method 5--Determination of Particulate Matter Emissions From Stationary
Sources

* * * * *
    <IP_ADDRESS> Metering System. Vacuum gauge, leak-free pump,
calibrated temperature sensors, dry gas meter (DGM) capable of
measuring volume to within 2 percent, and related equipment, as
shown in Figure 5-1. Other metering systems capable of maintaining
sampling rates within 10 percent of isokinetic and of determining
sample volumes to within 2 percent may be used, subject to the
approval of the Administrator. When the metering system is used in
conjunction with a pitot tube, the system shall allow periodic
checks of isokinetic rates.
* * * * *
    <IP_ADDRESS>.5 Clean the inside of the front half of the filter
holder by rubbing the surfaces with a Nylon bristle brush and
rinsing with acetone. Rinse each surface three times or more if
needed to remove visible particulate. Make a final rinse of the
brush and filter holder. Carefully rinse out the glass cyclone, also
(if applicable). After all acetone washings and particulate matter
have been collected in the sample container, tighten the lid on the
sample container so that acetone will not leak out when it is
shipped to the laboratory. Mark the height of the fluid level to
allow determination of whether leakage occurred during transport.
Label the container to clearly identify its contents.
* * * * *
    10.7 Field Balance Calibration Check. Check the calibration of
the balance used to weigh impingers with a weight that is at least
500g or within 50g of a loaded impinger. The weight must be ASTM
E617-13 ``Standard Specification for Laboratory Weights and
Precision Mass Standards'' (incorporated by reference--see 40 CFR
60.17) Class 6 (or better). Daily before use, the field balance must
measure the weight within 0.5g of the certified mass. If
the daily balance calibration check fails, perform corrective
measures and repeat the check before using balance.
    10.8 Analytical Balance Calibration. Perform a multipoint
calibration (at least five points spanning the operational range) of
the analytical balance before the first use, and semiannually
thereafter. The calibration of the analytical balance must be
conducted using ASTM E617-13 ``Standard Specification for Laboratory
Weights and Precision Mass Standards'' (incorporated by reference--
see 40 CFR 60.17) Class 2 (or better) tolerance weights. Audit the
balance each day it is used for gravimetric measurements by weighing
at least one ASTM E617-13 Class 2 tolerance (or better) calibration
weight that corresponds to 50 to 150 percent of the weight of one
filter or between 1g and 5g. If the scale cannot reproduce the value
of the calibration weight to within 0.5 mg of the certified mass,
perform corrective measures, and conduct the multipoint calibration
before use.
* * * * *

Method 5H--Determination of Particulate Matter Emissions From Wood
Heaters From a Stack Location

* * * * *
    10.4 Field Balance Calibration Check. Check the calibration of
the balance used to weigh impingers with a weight that is at least
500g or within 50g of a loaded impinger. The weight must be ASTM
E617-13 ``Standard Specification for Laboratory Weights and
Precision Mass Standards'' (incorporated by reference--see 40 CFR
60.17) Class 6 (or better). Daily before use, the field balance must
measure the weight within  0.5g of the certified mass.
If the daily balance calibration check fails, perform corrective
measures and repeat the check before using balance.
    10.5 Analytical Balance Calibration. Perform a multipoint
calibration (at least five points spanning the operational range) of
the analytical balance before the first use, and semiannually
thereafter. The calibration of the analytical balance must be
conducted using ASTM E617-13 ``Standard Specification for Laboratory
Weights and Precision Mass Standards'' (incorporated by reference--
see 40 CFR 60.17) Class 2 (or better) tolerance weights. Audit the
balance each day it is used for gravimetric measurements by weighing
at least one ASTM E617-13 Class 2 tolerance (or better) calibration
weight that corresponds to 50 to 150 percent of the weight of one
filter or between 1g and 5g. If the scale cannot reproduce the value
of the calibration weight to within 0.5 mg of the certified mass,
perform corrective measures, and conduct the multipoint calibration
before use.
* * * * *

Method 5I--Determination of Low Level Particulate Matter Emissions From
Stationary Sources

* * * * *
    10.1 Field Balance Calibration Check. Check the calibration of
the balance used to weigh impingers with a weight that is at least
500g or within 50g of a loaded impinger. The weight must be ASTM
E617-13 ``Standard Specification for Laboratory Weights and
Precision Mass Standards'' (incorporated by reference--see 40 CFR
60.17) Class 6 (or better). Daily, before use, the field balance
must measure the weight within 0.5g of the certified
mass. If the daily balance calibration check fails, perform
corrective measures and repeat the check before using balance.
    10.2 Analytical Balance Calibration. Perform a multipoint
calibration (at least five points spanning the operational range) of
the analytical balance before the first use, and semiannually
thereafter. The calibration of the analytical balance must be
conducted using ASTM E617-13 ``Standard Specification for Laboratory
Weights and Precision Mass Standards'' (incorporated by reference--
see 40 CFR 60.17) Class 2 (or better) tolerance weights. Audit the
balance each day it is used for gravimetric measurements by weighing
at least one ASTM E617-13 Class 2 tolerance (or better) calibration
weight that corresponds to 50 to 150 percent of the weight of one
filter or

between 1g and 5g. If the scale cannot reproduce the value of the
calibration weight to within 0.5 mg of the certified mass, perform
corrective measures and conduct the multipoint calibration before
use.
* * * * *

0
12. In appendix A-4 to part 60:
0
a. Revise section 8.3 in Method 6C.
0
b. Revise sections 8.1.2, 8.2.7, and 12.8 in Method 7E.
0
c. Revise sections 6.2.5 and 8.4.2 in Method 10.
0
d. Add section 6.2.6 in Method 10.
0
e. Revise sections 6.1.6, 6.1.7, 6.1.8, 6.1.9, 6.1.10, 8.1, 8.2.1 and
8.2.3 in Method 10A.
0
f. Add section 6.1.11 in Method 10A.
0
g. Revise section 6.1 in Method 10B.
    The revisions and additions read as follows:

Appendix A-4 to Part 60--Test Methods 6 Through 10B

* * * * *

Method 6C--Determination of Sulfur Dioxide Emissions From Stationary
Sources (Instrumental Analyzer Procedure)

* * * * *
    8.3 Interference Check. You must follow the procedures of
section 8.2.7 of Method 7E to conduct an interference check,
substituting SO2 for NOX as the method
pollutant. For dilution-type measurement systems, you must use the
alternative interference check procedure in section 16 and a co-
located, unmodified Method 6 sampling train.
* * * * *

Method 7E--Determination of Nitrogen Oxides Emissions From Stationary
Sources (Instrumental Analyzer Procedure)

* * * * *
    8.1.2 Determination of Stratification. Perform a stratification
test at each test site to determine the appropriate number of sample
traverse points. If testing for multiple pollutants or diluents at
the same site, a stratification test using only one pollutant or
diluent satisfies this requirement. A stratification test is not
required for small stacks that are less than 4 inches in diameter.
To test for stratification, use a probe of appropriate length to
measure the NOX (or pollutant of interest) concentration
at 12 traverse points located according to Table 1-1 or Table 1-2 of
Method 1. Alternatively, you may measure at three points on a line
passing through the centroidal area. Space the three points at 16.7,
50.0, and 83.3 percent of the measurement line. Sample for a minimum
of twice the system response time (see section 8.2.6) at each
traverse point. Calculate the individual point and mean
NOX concentrations. If the concentration at each traverse
point differs from the mean concentration for all traverse points by
no more than: 5.0 percent of the mean concentration; or
0.5 ppm (whichever is less restrictive), the gas stream
is considered unstratified, and you may collect samples from a
single point that most closely matches the mean. If the 5.0 percent
or 0.5 ppm criterion is not met, but the concentration at each
traverse point differs from the mean concentration for all traverse
points by not more than: 10.0 percent of the mean
concentration; or 1.0 ppm (whichever is less
restrictive), the gas stream is considered to be minimally
stratified and you may take samples from three points. Space the
three points at 16.7, 50.0, and 83.3 percent of the measurement
line. Alternatively, if a 12-point stratification test was performed
and the emissions were shown to be minimally stratified (all points
within  10.0 percent of their mean or within 1.0 ppm), and if the stack diameter (or equivalent diameter,
for a rectangular stack or duct) is greater than 2.4 meters (7.8
ft), then you may use 3-point sampling and locate the three points
along the measurement line exhibiting the highest average
concentration during the stratification test at 0.4, 1.2 and 2.0
meters from the stack or duct wall. If the gas stream is found to be
stratified because the 10.0 percent or 1.0 ppm criterion for a 3-
point test is not met, locate 12 traverse points for the test in
accordance with Table 1-1 or Table 1-2 of Method 1.
* * * * *
    8.2.7 Interference Check. Conduct an interference response test
of the gas analyzer prior to its initial use in the field. If you
have multiple analyzers of the same make and model, you need only
perform this alternative interference check on one analyzer. You may
also meet the interference check requirement if the instrument
manufacturer performs this or a similar check on an analyzer of the
same make and model of the analyzer that you use and provides you
with documented results.
    (1) You may introduce the appropriate interference test gases
(that are potentially encountered during a test; see examples in
Table 7E-3) into the analyzer separately or as mixtures. Test the
analyzer with the interference gas alone at the highest
concentration expected at a test source and again with the
interference gas and NOX at a representative
NOX test concentration. For analyzers measuring
NOX greater than 20 ppm, use a calibration gas with a
NOX concentration of 80 to 100 ppm and set this
concentration equal to the calibration span. For analyzers measuring
less than 20 ppm NOX, select an NO concentration for the
calibration span that reflects the emission levels at the sources to
be tested, and perform the interference check at that level. Measure
the total interference response of the analyzer to these gases in
ppmv. Record the responses and determine the interference using
Table 7E-4. The specification in section 13.4 must be met.
    (2) A copy of this data, including the date completed and signed
certification, must be available for inspection at the test site and
included with each test report. This interference test is valid for
the life of the instrument unless major analytical components (e.g.,
the detector) are replaced with different model parts. If major
components are replaced with different model parts, the interference
gas check must be repeated before returning the analyzer to service.
If major components are replaced, the interference gas check must be
repeated before returning the analyzer to service. The tester must
ensure that any specific technology, equipment, or procedures that
are intended to remove interference effects are operating properly
during testing.
* * * * *
    12.8 NO2--NO Conversion Efficiency Correction. If
desired, calculate the total NOX concentration with a
correction for converter efficiency using Equation 7E-8.
[GRAPHIC] [TIFF OMITTED] TR30AU16.008

* * * * *

Method 10--Determination of Carbon Monoxide Emissions From Stationary
Sources (Instrumental Analyzer Procedure)

* * * * *
    6.2.5 Flexible Bag. Tedlar, or equivalent, with a capacity of 60
to 90 liters (2 to 3 ft\3\). (Verify through the manufacturer that
the Tedlar alternative is suitable for CO and make this verified
information available for inspection.) Leak-test the bag in the
laboratory before using by evacuating with a pump followed by a dry
gas meter. When the evacuation is complete, there should be no flow
through the meter.
    6.2.6 Sample Tank. Stainless steel or aluminum tank equipped
with a pressure indicator with a minimum volume of 4 liters.
* * * * *
    8.4.2 Integrated Sampling. Evacuate the flexible bag or sample
tank. Set up the equipment as shown in Figure 10-1 with the bag
disconnected. Place the probe in the stack and purge the sampling
line. Connect the bag, making sure that all connections are leak-
free. Sample at a rate proportional to the stack velocity. If
needed, the CO2 content of the gas may be determined by
using the Method 3 integrated sample procedures, or by weighing an
ascarite CO2 removal tube used and computing
CO2 concentration from the gas volume sampled and the
weight gain of the tube. Data may be recorded on a form similar to
Table 10-1. If a sample tank is used for sample collection, follow
procedures similar to those in sections 8.1.2, 8.2.3, 8.3, and 12.4
of Method 25 as appropriate to

prepare the tank, conduct the sampling, and correct the measured
sample concentration.
* * * * *

Method 10A--Determination of Carbon Monoxide Emissions in Certifying
Continuous Emission Monitoring Systems at Petroleum Refineries

* * * * *
    6.1.6 Flexible Bag. Tedlar, or equivalent, with a capacity of 10
liters (0.35 ft\3\) and equipped with a sealing quick-connect plug.
The bag must be leak-free according to section 8.1. For protection,
it is recommended that the bag be enclosed within a rigid container.
    6.1.7 Sample Tank. Stainless steel or aluminum tank equipped
with a pressure indicator with a minimum volume of 10 liters.
    6.1.8 Valves. Stainless-steel needle valve to adjust flow rate,
and stainless-steel 3-way valve, or equivalent.
    6.1.9 CO2 Analyzer. Fyrite, or equivalent, to measure
CO2 concentration to within 0.5 percent.
    6.1.10 Volume Meter. Dry gas meter, capable of measuring the
sample volume under calibration conditions of 300 ml/min (0.01
ft\3\/min) for 10 minutes.
    6.1.11 Pressure Gauge. A water filled U-tube manometer, or
equivalent, of about 30 cm (12 in.) to leak-check the flexible bag.
* * * * *
    8.1 Sample Bag or Tank Leak-Checks. While a leak-check is
required after bag or sample tank use, it should also be done before
the bag or sample tank is used for sample collection. The tank
should be leak-checked according to the procedure specified in
section 8.1.2 of Method 25. The bag should be leak-checked in the
inflated and deflated condition according to the following
procedure:
* * * * *
    8.2.1 Evacuate and leak check the sample bag or tank as
specified in section 8.1. Assemble the apparatus as shown in Figure
10A-1. Loosely pack glass wool in the tip of the probe. Place 400 ml
of alkaline permanganate solution in the first two impingers and 250
ml in the third. Connect the pump to the third impinger, and follow
this with the surge tank, rate meter, and 3-way valve. Do not
connect the bag or sample tank to the system at this time.
* * * * *
    8.2.3 Purge the system with sample gas by inserting the probe
into the stack and drawing the sample gas through the system at 300
ml/min 10 percent for 5 minutes. Connect the evacuated
bag or sample tank to the system, record the starting time, and
sample at a rate of 300 ml/min for 30 minutes, or until the bag is
nearly full, or the sample tank reaches ambient pressure. Record the
sampling time, the barometric pressure, and the ambient temperature.
Purge the system as described above immediately before each sample.
* * * * *

Method 10B--Determination of Carbon Monoxide Emissions from Stationary
Sources

* * * * *
    6.1. Sample Collection. Same as in Method 10A, section 6.1
(paragraphs 6.1.1 through 6.1.11).
* * * * *

0
13. Revise section 8.3.2 in Method 15 of appendix A-5 to part 60 to
read as follows:

Appendix A-5 to Part 60-Test Methods 11 Through 15A

* * * * *

Method 15--Determination of Hydrogen Sulfide, Carbonyl Sulfide, and
Carbon Disulfide Emissions From Stationary Sources

* * * * *
    8.3.2 Determination of Calibration Drift. After each run, or
after a series of runs made within a 24-hour period, perform a
partial recalibration using the procedures in section 10.0. Only
H2S (or other permeant) need be used to recalibrate the
GC/FPD analysis system and the dilution system. Partial
recalibration may be performed at the midlevel calibration gas
concentration or at a concentration measured in the samples but not
less than the lowest calibration standard used in the initial
calibration. Compare the calibration curves obtained after the runs
to the calibration curves obtained under section 10.3. The
calibration drift should not exceed the limits set forth in section
13.4. If the drift exceeds this limit, the intervening run or runs
should be considered invalid. As an option, the calibration data set
that gives the highest sample values may be chosen by the tester.
* * * * *

0
14. In appendix A-6 to part 60:
0
a. Revise sections 12.1 and 12.2 in Method 16C.
0
b. Remove section <IP_ADDRESS>.2.3 in Method 18.
    The revisions read as follows:

Appendix A-6 to Part 60--Test Methods 16 Through 18

* * * * *

Method 16C--Determination of Total Reduced Sulfur Emissions From
Stationary Sources

* * * * *
    12.1 Nomenclature.

ACE = Analyzer calibration error, percent of calibration span.
CD = Calibration drift, percent.
CDir = Measured concentration of a calibration gas (low,
mid, or high) when introduced in direct calibration mode, ppmv.
CH2S = Concentration of the system performance check gas,
ppmv H2S.
CS = Measured concentration of the system performance gas
when introduced in system calibration mode, ppmv H2S.
CV = Manufacturer certified concentration of a
calibration gas (low, mid, or high), ppmv SO2.
CSO2 = Unadjusted sample SO2 concentration,
ppmv.
CTRS = Total reduced sulfur concentration corrected for
system performance, ppmv.
CS = Calibration span, ppmv.
DF = Dilution system (if used) dilution factor, dimensionless.
SP = System performance, percent.

    12.2 Analyzer Calibration Error. For non-dilution systems, use
Equation 16C-1 to calculate the analyzer calibration error for the
low-, mid-, and high-level calibration gases.
[GRAPHIC] [TIFF OMITTED] TR30AU16.009

* * * * *

0
15. In appendix A-7 to part 60:
0
a. Revise sections 9.1, 12.1, and 12.3 in Method 25C.
0
b. Remove section 11.2 in Method 25C.
0
c. Add sections 12.4, 12.5, 12.5.1 and 12.5.2 in Method 25C.
    The revisions and additions read as follows:

Appendix A-7 to Part 60--Test Methods 19 Through 25E

* * * * *

Method 25C--Determination of Nonmethane Organic Compounds (NMOC) in
Landfill Gases

* * * * *
    9.1 Miscellaneous Quality Control Measures.

------------------------------------------------------------------------
                                 Quality control
           Section                   measure               Effect
------------------------------------------------------------------------
8.4.2.......................  Verify that landfill  Ensures that ambient
                               gas sample contains   air was not drawn
                               less than 20          into the landfill
                               percent N2 or 5       gas sample and gas
                               percent O2.           was sampled from an
                                                     appropriate
                                                     location.

10.1, 10.2..................  NMOC analyzer         Ensures precision of
                               initial and daily     analytical results.
                               performance checks.
------------------------------------------------------------------------

* * * * *
    12.1 Nomenclature
Bw = Moisture content in the sample, fraction.
CN2 = N2 concentration in the diluted sample
gas.
CmN2 = Measured N2 concentration, fraction in
landfill gas.
CmOx = Measured Oxygen concentration, fraction in
landfill gas.
COx = Oxygen concentration in the diluted sample gas.
Ct = Calculated NMOC concentration, ppmv C equivalent.
Ctm = Measured NMOC concentration, ppmv C equivalent.
Pb = Barometric pressure, mm Hg.
Pt = Gas sample tank pressure after sampling, but before
pressurizing, mm Hg absolute.
Ptf = Final gas sample tank pressure after pressurizing,
mm Hg absolute.
Pti = Gas sample tank pressure after evacuation, mm Hg
absolute.
Pw = Vapor pressure of H2O (from Table 25C-1),
mm Hg.
r = Total number of analyzer injections of sample tank during
analysis (where j = injection number, 1 . . . r).
Tt = Sample tank temperature at completion of sampling,
[deg]K.
Tti = Sample tank temperature before sampling, [deg]K.
Ttf = Sample tank temperature after pressuring, [deg]K.
* * * * *
    12.3 Nitrogen Concentration in the landfill gas. Use equation
25C-2 to calculate the measured concentration of nitrogen in the
original landfill gas.
[GRAPHIC] [TIFF OMITTED] TR30AU16.010

    12.4 Oxygen Concentration in the landfill gas. Use equation 25C-
3 to calculate the measured concentration of oxygen in the original
landfill gas.
[GRAPHIC] [TIFF OMITTED] TR30AU16.011

    12.5 You must correct the NMOC Concentration for the
concentration of nitrogen or oxygen based on which gas or gases
passes the requirements in section 9.1.
    12.5.1 NMOC Concentration with nitrogen correction. Use Equation
25C-4 to calculate the concentration of NMOC for each sample tank
when the nitrogen concentration is less than 20 percent.
[GRAPHIC] [TIFF OMITTED] TR30AU16.012

    12.5.2 NMOC Concentration with oxygen correction. Use Equation
25C-5 to calculate the concentration of NMOC for each sample tank if
the landfill gas oxygen is less than 5 percent and the landfill gas
nitrogen concentration is greater than 20 percent.
[GRAPHIC] [TIFF OMITTED] TR30AU16.013

* * * * *

0
16. In appendix A-8 to Part 60:
0
a. Revise section 13.3 in Method 26.
0
b. Revise sections 4.3 and 8.1.6 in Method 26A.
0
c. Revise section <IP_ADDRESS> in Method 29.
0
d. Add sections 10.4 and 10.5 in Method 29.
0
e. Revise the section heading for section 8.1 in Method 30A.
0
f. Revise the section heading for section 8.1, and revise <IP_ADDRESS> in
Method 30B.
    The revisions and additions read as follows:

Appendix A-8 to Part 60--Test Methods 26 Through 30B

* * * * *

Method 26--Determination of Hydrogen Chloride Emissions From Stationary
Sources

* * * * *
    13.3 Detection Limit. A typical IC instrumental detection limit
for Cl- is 0.2 [mu]g/ml. Detection limits for the other
analyses should be similar. Assuming 50 ml liquid recovered from
both the acidified impingers, and the basic impingers, and 0.12 dscm
(4.24 dscf) of stack gas sampled, then the analytical detection
limit in the stack gas would be about 0.05 ppm for HCl and
Cl2, respectively.
* * * * *

Method 26A--Determination of Hydrogen Halide and Halogen Emissions From
Stationary Sources Isokinetic Method

* * * * *
    4.3 High concentrations of nitrogen oxides (NOX) may