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Update of Continuous Instrumental Test Methods; Correction

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Information about this document as published in the Federal Register.

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Environmental Protection Agency (EPA).


Final rule; correction.


EPA published a final rule in the Federal Register on May 22, 2008, that made technical corrections to five test methods. Inadvertent printing errors were made in the publication. Text insertions were misplaced, duplicate insertions were made, and the definition for system bias was inadvertently revised. The purpose of this action is to correct these errors.


This correction is effective on June 29, 2009.

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Mr. Foston Curtis, Air Quality Assessment Division, Office of Air Quality Planning and Standards (E143-02), Environmental Protection Agency, Research Triangle Park, North Carolina 27711; telephone number (919) 541-1063; fax number (919) 541-0516; e-mail address:

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I. Summary of Amendment

EPA promulgated revisions to continuous instrumental test methods on May 22, 2008, where a number of technical amendments were made to five test methods. Several of the revisions were added to the text in the wrong places and in some cases duplicate insertions were made. The definition for system bias was also inadvertently revised. This action corrects those publication errors.

Section 553 of the Administrative Procedure Act (APA), 5 U.S.C. 553(b)(3)(B), provides that, when an Agency for good cause finds that notice and public procedure are impracticable, unnecessary, or contrary to the public interest, the Agency may issue a rule without providing notice and an opportunity for public comment. We have determined that there is good cause for making this technical correction final without prior proposal and opportunity for comment because only simple publication errors are being corrected that do not substantially change the Agency actions taken in the final rule. Thus, notice and public procedure are unnecessary. We find that this constitutes good cause under 5 U.S.C. 553(b)(3)(B). (See also the final sentence of section 307(d)(1) of the Clean Air Act (CAA), 42 U.S.C. 307(d)(1), indicating that the good cause provisions in subsection 553(b) of the APA continue to apply to this type of rulemaking under section 307(d) of the CAA.

II. Statutory and Executive Order Reviews

Under Executive Order 12866, Regulatory Planning and Review (58 FR 51735, October 4, 1993), this action is not a “significant regulatory action” and is therefore not subject to review by the Office of Management and Budget. This action is not a “major rule” as defined by 5 U.S.C. 804(2). The technical corrections do not impose an information collection burden under the provisions of the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.).

Because EPA has made a “good cause” finding that this action is not subject to notice and comment requirements under the APA or any other statute (see Section II), it is not subject to the regulatory flexibility provisions of the Regulatory Flexibility Act [5 U.S.C. 601 et seq.], or to sections 202 and 205 of the Unfunded Mandates Reform Act of 1995 (UMRA) [Pub. L. 104-4]. In addition, this action does not significantly or uniquely affect small governments or impose a significant intergovernmental mandate, as described in sections 203 and 204 of the UMRA.

This action also does not significantly or uniquely affect the communities of Tribal governments, as specified by Executive Order 13175, Consultation and Coordination with Indian Tribal Governments (65 FR 67249, November 9, 2000). This correction also is not subject to Executive Order 13045, Protection of Children from Environmental Health and Safety Risks (62 FR 19885, April 23, 1997) because it is not economically significant.

This technical correction does not involve changes to the technical standards related to test methods or monitoring requirements; thus, the requirements of section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272) do not apply.

This technical correction also does not involve special consideration of environmental justice-related issues as required by Executive Order 12898, Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations (59 FR 7629, February 16, 1994).

The Congressional Review Act (CRA), 5 U.S.C. 801 et seq., as added by the Small Business Regulatory Enforcement Fairness Act of 1996 (SBREFA), generally provides that before a rule may take effect, the Agency promulgating the rule must submit a rule report, which includes a copy of the rule, to each House of the Congress and to the Comptroller General of the U.S. Section 808 allows the issuing Agency to make a rule effective sooner than otherwise provided by the CRA if the Agency makes a good cause finding that notice and public procedure is impracticable, unnecessary, or contrary to the public interest. This Start Printed Page 25667determination must be supported by a brief statement. 5 U.S.C. 808(2). As stated previously, EPA has made such a good cause finding, including the reasons therefor, and established an effective date of June 29, 2009. The EPA will submit a report containing this final action and other required information to the U.S. Senate, the U.S. House of Representatives, and the Comptroller General of the United States prior to publication of this action in the Federal Register. This action is not a “major rule” as defined by 5 U.S.C. 804(2). The final rule will be effective June 29, 2009.

This technical correction does not have substantial direct effects on the States, or on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of Government, as specified in Executive Order 13132, Federalism (64 FR 43255, August 10, 1999).

This technical correction is not subject to Executive Order 13211, Actions Concerning Regulations That Significantly Affect Energy Supply, Distribution, or Use (66 FR 28355, May 22, 2001) because this action is not a significant regulatory action under Executive Order 12866.

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List of Subjects in 40 CFR Part 60

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Dated: May 22, 2009.

Lisa P. Jackson,


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For the reasons set out in the preamble, title 40, chapter I of the Code of Federal Regulations is amended as follows:

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1. The authority citation for Part 60 continues to read as follows:

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

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2. Method 3A is amended by revising Section 7.1 to read as follows:

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Method 3A—Determination of Oxygen and Carbon Dioxide Concentrations in Emissions From Stationary Sources (Instrumental Analyzer Procedure)

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7.1 Calibration Gas. What calibration gasses do I need? Refer to Section 7.1 of Method 7E for the calibration gas requirements. Example calibration gas mixtures are listed below. Precleaned or scrubbed air may be used for the O2 high-calibration gas provided it does not contain other gases that interfere with the O2 measurement.

(a) CO2 in nitrogen (N2).

(b) CO2 in air.

(c) CO2/SO2 gas mixture in N2.

(d) O2/SO2 gas mixture in N2.

(e) O2/CO2/SO2 gas mixture in N2.

(f) CO2/NOX gas mixture in N2.

(g) CO2/SO2/NOX gas mixture in N2.

The tests for analyzer calibration error and system bias require high-, mid-, and low-level gases.

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3. Method 7E is amended as follows:

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a. By revising section 3.12.

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b. By revising section 3.16.

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c. By revising section 7.1.

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d. By revising section 8.1.2.

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e. By revising section 8.2.1.

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f. By revising section 8.2.4.

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g. By revising the Summary Table of QA/QC in Section 9.0.

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h. By revising section 12.11.

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i. By revising section 16.2.2.

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

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3.12 Low-Concentration Analyzer means any analyzer that operates with a calibration span of 20 ppm NOX or lower. Each analyzer model used routinely to measure low NOX concentrations must pass a manufacturer's stability test (MST). An MST subjects the analyzer to a range of line voltages and temperatures that reflect potential field conditions to demonstrate its stability following procedures similar to those provided in 40 CFR 53.23. Ambient-level analyzers are exempt from the MST requirements of Section 16.3. A copy of this information must be included in each test report. Table 7E-5 lists the criteria to be met.

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3.16 System Bias means the difference between a calibration gas measured in direct calibration mode and in system calibration mode. System bias is determined before and after each run at the low- and mid- or high-concentration levels. For dilution-type systems, pre- and post-run system calibration error is measured rather than system bias.

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7.1 Calibration Gas. What calibration gases do I need? Your calibration gas must be NO in N2 and certified (or recertified) within an uncertainty of 2.0 percent in accordance with “EPA Traceability Protocol for Assay and Certification of Gaseous Calibration Standards” September 1997, as amended August 25, 1999, EPA-600/R-97/121. Blended gases meeting the Traceability Protocol are allowed if the additional gas components are shown not to interfere with the analysis. If a zero gas is used for the low-level gas, it must meet the requirements under the definition for “zero air material” in 40 CFR 72.2. The calibration gas must not be used after its expiration date. Except for applications under part 75 of this chapter, it is acceptable to prepare calibration gas mixtures from EPA Traceability Protocol gases in accordance with Method 205 in appendix M to part 51 of this chapter. For part 75 applications, the use of Method 205 is subject to the approval of the Administrator. The goal and recommendation for selecting calibration gases is to bracket the sample concentrations. The following calibration gas concentrations are required:

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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 twelve 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: (a) ± 5.0 percent of the mean concentration; or (b) ± 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 Start Printed Page 25668concentration for all traverse points by no more than: (a) ± 10.0 percent of the mean; or (b) ± 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 twelve-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, 1.0 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 twelve traverse points for the test in accordance with Table 1-1 or Table 1-2 of Method 1.

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8.2.1 Calibration Gas Verification. How must I verify the concentrations of my calibration gases? Obtain a certificate from the gas manufacturer documenting the quality of the gas. Confirm that the manufacturer certification is complete and current. Ensure that your calibration gas certifications have not expired. This documentation should be available on-site for inspection. To the extent practicable, select a high-level gas concentration that will result in the measured emissions being between 20 and 100 percent of the calibration span.

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8.2.4 NO2to NO Conversion Efficiency Test. Before or after each field test, you must conduct an NO2 to NO conversion efficiency test if your system converts NO2 to NO before analyzing for NOX. You may risk testing multiple facilities before performing this test provided you pass this test at the conclusion of the final facility test. A failed final conversion efficiency test in this case will invalidate all tests performed subsequent to the test in which the converter efficiency test was passed. Follow the procedures in Section, or If desired, the converter efficiency factor derived from this test may be used to correct the test results for converter efficiency if the NO2 fraction in the measured test gas is known. Use Equation 7E-8 in Section 12.8 for this correction.

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9.0 Quality Control * * *

Summary Table of AQ/QC

StatusProcess or elementQA/QC specificationAcceptance criteriaChecking frequency
SIdentify Data UserRegulatory Agency or other primary end user of dataBefore designing test.
SAnalyzer DesignAnalyzer resolution or sensitivity< 2.0% of full-scale rangeManufacturer design.
MInterference gas checkSum of responses ≤ 2.5% of calibration span Alternatively, sum of responses:
≤ 0.5 ppmv for calibration spans of 5 to 10 ppmv
≤ 0.2 ppmv for calibration spans < 5 ppmv
See Table 7E-3
MCalibration GasesTraceability protocol (G1, G2)Valid certificate required Uncertainty ≤ 2.0% of tag value
MHigh-level gasEqual to the calibration spanEach test.
MMid-level gas40 to 60% of calibration spanEach test.
MLow-level gas< 20% of calibration spanEach test.
SData Recorder DesignData resolution≤ 0.5% of full-scale rangeManufacturer design.
SSample ExtractionProbe materialSS or quartz if stack > 500° FEast test.
MSample ExtractionProbe, filter and sample line temperatureFor dry-basis analyzers, keep sample above the dew point by heating, prior to sample conditioningEach run.
For wet-basis analyzers, keep sample above dew point at all times, by heating or dilution
SSample ExtractionCalibration valve materialSSEach test.
SSample ExtractionSample pump materialInert to sample constituentsEach test.
SSample ExtractionManifolding materialInert to sample constituentsEach test.
SMoisture RemovalEquipment efficiency< 5% target compound removalVerified through system bias check.
SParticulate RemovalFilter inertnessPass system bias checkEach bias check.
MAnalyzer & Calibration Gas PerformanceAnalyzer calibration error (of 3-point system calibration error for dilution systems)Within ± 2.0 percent of the calibration span of the analyzer for the low-, mid-, and high-level calibration gasesBefore initial run and after a failed system bias test or drift test.
Alternative specification: ≤ 0.5 ppmv absolute difference
MSystem PerformanceSystem bias (or pre- and post-run 2-point system calibration error for dilution (Systems)Within ± 5.0% of the analyzer calibration span for low-sacle and upscale calibration gasesBefore and after each run.
Alternative specification: ≤ 0.5 ppmv absolute difference
MSystem PerformanceSystem response timeDetermines minimum sampling time per pointDuring initial sampling system bias test.
MSystem PerformanceDrift≤ 3.0% of calibration span for low-level and mid- or high-level gasesAfter each test run.
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Alternative specification: ≤ 0.5 ppmv absolute difference
MSystem PerformanceNO2-NO conversion efficiency≥ 90% of certified test gas concentrationBefore or after each test.
MSystem PerformancePurge time≥ 2 times system response timeBefore starting the first run and when probe is removed from and re-inserted into the stack.
MSystem PerformanceMinimum sample time at each pointTwo times the system response timeEach sample point.
MSystem PerformanceStable sample flow rate (surrogate for maintaining system response time)Within 10% of flow rate established during system response time checkEach run.
MSample Point SelectionStratification testAll points within:Prior to first run.
± 5% of mean for 1-point sampling
± 10% of mean for 3-point
Alternatively, all points within:
± 0.5 ppm of mean for 1-point sampling
± 1.0 ppm of mean for 3-point sampling
AMultiple sample points simultaneouslyNo. of openings in probeMulti-hole probe with verifiable constant flow through all holes within 10% of mean flow rate (requires Administrative approval for Part 75)Each run.
MData RecordingFrequency≤ 1 minute averageDuring run.
SData ParametersSample concentration rangeAll 1-minute averages within calibration spanEach run.
MDate ParametersAverage concentration for the runRun average ≤ calibration spanEach run.
S = Suggest.
M = Mandatory.
A = Alternative.
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12.11 Calculated Spike Gas Concentration and Spike Recovery for the Example Alternative Dynamic Spiking Procedure in Section 16.1.3. Use Equation 7E-11 to determine the calculated spike gas concentration. Use Equation 7E-12 to calculate the spike recovery.

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16.2.2 Tedlar Bag Procedure. Perform the analyzer calibration error test to document the calibration (both NO and NOX modes, as applicable). Fill a Tedlar bag approximately half full with either ambient air, pure oxygen, or an oxygen standard gas with at least 19.5 percent by volume oxygen content. Fill the remainder of the bag with mid- to high-level NO in N2 (or other appropriate concentration) calibration gas. (Note that the concentration of the NO standard should be sufficiently high enough for the diluted concentration to be easily and accurately measured on the scale used. The size of the bag should be large enough to accommodate the procedure and time required.)

(1) Immediately attach the bag to the inlet of the NOX analyzer (or external converter if used). In the case of a dilution-system, introduce the gas at a point upstream of the dilution assembly. Measure the NOX concentration for a period of 30 minutes. If the NOX concentration drops more than 2 percent absolute from the peak value observed, then the NO2 converter has failed to meet the criteria of this test. Take corrective action. The highest NOX value observed is considered to be NOXPeak. The final NOX value observed is considered to be NOXfinal.

(2) [Reserved]

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[FR Doc. E9-12565 Filed 5-28-09; 8:45 am]