[Federal Register Volume 86, Number 54 (Tuesday, March 23, 2021)]
[Rules and Regulations]
[Pages 15421-15423]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-05761]



[[Page 15421]]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 60

[EPA-HQ-OAR-2018-0815; FRL 10018-97-OAR]
RIN 2060-AU39


Test Methods and Performance Specifications for Air Emission 
Sources; Correction

AGENCY: Environmental Protection Agency (EPA).

ACTION: Correcting amendments.

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SUMMARY: The Environmental Protection Agency (EPA) is correcting a 
final rule that was published in the Federal Register on October 7, 
2020, and was effective on December 7, 2020. The final rule corrected 
and updated regulations for source testing of emissions. This 
correction does not change any final action taken by the EPA on October 
7, 2020; this action corrects the amendatory instructions for Methods 4 
and 5.

DATES: The correction is effective on March 23, 2021.

ADDRESSES: The EPA has established a docket for this action under 
Docket ID No. EPA-HQ-OAR-2018-0815. All documents in the docket are 
listed at http://www.regulations.gov. 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: Mrs. 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: (919) 541-2910; fax number: (919) 541-0516; email 
address: [email protected].

SUPPLEMENTARY INFORMATION: In the final rulemaking published in the 
Federal Register on October 7, 2020 (85 FR 63394), there were some 
inadvertent errors made to Methods 4 and 5 due to unclear or incorrect 
amendatory instruction. In this correction document, we are clarifying 
and correcting the amendatory instructions for ``Appendix A-3 to part 
60'' to correct the inadvertent errors and incorporate the revisions 
from the final rulemaking.
    In Method 4, we are revising sections 8.1.3.1, 8.1.3.2, and adding 
sections 8.1.3.2.1, 8.1.3.2.2, 8.1.3.2.3, 8.1.3.2.4, 8.1.3.3, and 
8.1.3.4. We are also revising section 12.1.3.
    In Method 5, we are revising sections 12.3, 12.11.1, 12.11.2, 
16.1.1.4, and 16.2.3.3.

List of Subjects 40 CFR Part 60

    Environmental protection, Air pollution control, Incorporation by 
reference, Performance specifications, Test methods and procedures.

Joseph Goffman,
Acting Assistant Administrator, Office of Air and Radiation.

    Accordingly, 40 CFR part 60 is corrected as follows:

PART 60--STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES

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

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


0
2. Amend appendix A-3 to part 60 by:
0
a. In Method 4 by:
0
i. Revising sections ``8.1.3.1'' and ``8.1.3.2'';
0
ii. Adding sections ``8.1.3.2.1'', ``8.1.3.2.2'', ``8.1.3.2.3'', 
``8.1.3.2.4'', ``8.1.3.3'', and ``8.1.3.4''; and
0
iii. Revising section ``12.1.3''; and
0
b. In Method 5 by revising sections ``12.3'', ``12.11.1'', ``12.11.2'', 
``16.1.1.4'', and ``16.2.3.3''.
    The additions and revisions read as follows:

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

* * * * *

Method 4--Determination of Moisture Content in Stack Gases

* * * * *
    8.1.3.1 Leak Check of Metering System Shown in Figure 4-1. That 
portion of the sampling train from the pump to the orifice meter 
should be leak-checked prior to initial use and after each shipment. 
Leakage after the pump will result in less volume being recorded 
than is actually sampled. The following procedure is suggested (see 
Figure 5-2 of Method 5): Close the main valve on the meter box. 
Insert a one-hole rubber stopper with rubber tubing attached into 
the orifice exhaust pipe. Disconnect and vent the low side of the 
orifice manometer. Close off the low side orifice tap. Pressurize 
the system to 13 to 18 cm (5 to 7 in.) water column by blowing into 
the rubber tubing. Pinch off the tubing and observe the manometer 
for one minute. A loss of pressure on the manometer indicates a leak 
in the meter box; leaks, if present, must be corrected. 8.1.3.2 
Pretest Leak Check. A pretest leak check of the sampling train is 
recommended, but not required. If the pretest leak check is 
conducted, the following procedure should be used. 8.1.3.2.1 After 
the sampling train has been assembled, turn on and set the filter 
and probe heating systems to the desired operating temperatures. 
Allow time for the temperatures to stabilize. 8.1.3.2.2 Leak-check 
the train by first plugging the inlet to the filter holder and 
pulling a 380 mm (15 in.) Hg vacuum. Then connect the probe to the 
train, and leak-check at approximately 25 mm (1 in.) Hg vacuum; 
alternatively, the probe may be leak-checked with the rest of the 
sampling train, in one step, at 380 mm (15 in.) Hg vacuum. Leakage 
rates in excess of 4 percent of the average sampling rate or 0.00057 
m\3\/min (0.020 cfm), whichever is less, are unacceptable. 8.1.3.2.3 
Start the pump with the bypass valve fully open and the coarse 
adjust valve completely closed. Partially open the coarse adjust 
valve, and slowly close the bypass valve until the desired vacuum is 
reached. Do not reverse the direction of the bypass valve, as this 
will cause water to back up into the filter holder. If the desired 
vacuum is exceeded, either leak-check at this higher vacuum, or end 
the leak check and start over. 8.1.3.2.4 When the leak check is 
completed, first slowly remove the plug from the inlet to the probe, 
filter holder, and immediately turn off the vacuum pump. This 
prevents the water in the impingers from being forced backward into 
the filter holder and the silica gel from being entrained backward 
into the third impinger. 8.1.3.3 Leak Checks During Sample Run. If, 
during the sampling run, a component (e.g., filter assembly or 
impinger) change becomes necessary, a leak check shall be conducted 
immediately before the change is made. The leak check shall be done 
according to the procedure outlined in section 8.1.3.2, except that 
it shall be done at a vacuum equal to or greater than the maximum 
value recorded up to that point in the test. If the leakage rate is 
found to be no greater than 0.00057 m\3\/min (0.020 cfm) or 4 
percent of the average sampling rate (whichever is less), the 
results are acceptable, and no correction will need to be applied to 
the total volume of dry gas metered; if, however, a higher leakage 
rate is obtained, either record the leakage rate and plan to correct 
the sample volume as shown in section 12.3 of Method 5, or void the 
sample run.

    Note: Immediately after component changes, leak checks are 
optional. If such leak checks are done, the procedure outlined in 
section 8.1.3.2 should be used.

    8.1.3.4 Post-Test Leak Check. A leak check of the sampling train is 
mandatory at the conclusion of each sampling run. The leak check shall 
be performed in accordance with the procedures outlined in section 
8.1.3.2, except that it shall be conducted at a vacuum equal to or 
greater than the maximum value reached during the sampling run. If the 
leakage rate is found to be no greater than 0.00057 m\3\ min (0.020 
cfm) or 4 percent of the average sampling rate (whichever is less), the 
results are acceptable, and no correction need be applied to the total

[[Page 15422]]

volume of dry gas metered. If, however, a higher leakage rate is 
obtained, either record the leakage rate and correct the sample volume 
as shown in section 12.3 of Method 5 or void the sampling run.
* * * * *
    12.1.3 Volume of Water Collected in Silica Gel.
    [GRAPHIC] [TIFF OMITTED] TR23MR21.004
    
Where:

K3 = 0.001335 m\3\/g for metric units = 0.04716 ft\3\/g 
for English units.
* * * * *

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

* * * * *
    12.3 Dry Gas Volume. Correct the sample volume measured by the dry 
gas meter to standard conditions (20 [deg]C, 760mm Hg or 68 [deg]F, 
29.92 in. Hg) by using Equation 5-1.
[GRAPHIC] [TIFF OMITTED] TR23MR21.005

Where:

K1 = 0.38572 [deg]K/mm Hg for metric units = 17.636 
[deg]R/in. Hg for English units.

    Note: Equation 5-1 can be used as written unless the leakage 
rate observed during any of the mandatory leak checks (i.e., the 
post-test leak check or leak checks conducted prior to component 
changes) exceeds La. If Lp or Li 
exceeds La, Equation 5-1 must be modified as follows:

    (a) Case I. No component changes made during sampling run. In this 
case, replace Vm in Equation 5-1 with the expression:

(Vm - (Lp - La)[thetas])

    (b) Case II. One or more component changes made during the sampling 
run. In this case, replace Vm in Equation 5-1 by the expression:
[GRAPHIC] [TIFF OMITTED] TR23MR21.006

and substitute only for those leakage rates (Li or 
Lp) which exceed La.
* * * * *
    12.11.1 Calculation from Raw Data.
    [GRAPHIC] [TIFF OMITTED] TR23MR21.007
    
Where:

K4 = 0.003456 ((mm Hg)(m\3\))/((ml)([deg]K)) for metric 
units,
= 0.002668 ((in. Hg)(ft\3\))/((ml)([deg]R)) for English units.

    12.11.2 Calculation from Intermediate Values.
    [GRAPHIC] [TIFF OMITTED] TR23MR21.008
    

[[Page 15423]]


Where:

    K5 = 4.3209 for metric units = 0.09450 for English 
units.
* * * * *
    16.1.1.4 Calculate flow rate, Q, for each run using the wet test 
meter volume, Vw, and the run time, [thgr]. Calculate the 
DGM coefficient, Yds, for each run. These calculations are 
as follows:
[GRAPHIC] [TIFF OMITTED] TR23MR21.009

[GRAPHIC] [TIFF OMITTED] TR23MR21.010

Where:

K1 = 0.38572 [deg]K/mm Hg for metric units = 17.636 
[deg]R/in. Hg for English units.
Vw = Wet test meter volume, liter (ft3).
Vds = Dry gas meter volume, liter (ft3).
Tds = Average dry gas meter temperature, [deg]C ([deg]F).
Tadj = 273.15 [deg]C for metric units = 459.67 [deg]F for 
English units.
Tw = Average wet test meter temperature, [deg]C ([deg]F).
Pbar = Barometric pressure, mm Hg (in. Hg).
[Delta]p = Dry gas meter inlet differential pressure, mm 
H2O (in. H2O).
[thgr] = Run time, min.
* * * * *
    16.2.3.3 Calculate the standard volumes of air passed through the 
DGM and the critical orifices, and calculate the DGM calibration 
factor, Y, using the equations below:
[GRAPHIC] [TIFF OMITTED] TR23MR21.011

[GRAPHIC] [TIFF OMITTED] TR23MR21.012

[GRAPHIC] [TIFF OMITTED] TR23MR21.013

Where:

Vcr(std) = Volume of gas sample passed through the 
critical orifice, corrected to standard conditions, dscm (dscf).
K1 = 0.38572 [deg]K/mm Hg for metric units = 17.636 
[deg]R/in. Hg for English units.
* * * * *
[FR Doc. 2021-05761 Filed 3-22-21; 8:45 am]
BILLING CODE 6560-50-P