Notice2025-05923
Ambient Air Monitoring Reference and Equivalent Methods; Designation of Two New Equivalent Methods
Primary source
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Published
April 7, 2025
Issuing agencies
Environmental Protection Agency
Abstract
Notice is hereby given that the Environmental Protection Agency (EPA) has designated one new equivalent method for measuring concentrations of PM<INF>2.5</INF> and one new equivalent method for measuring PM<INF>10-2.5</INF> in ambient air.
Full Text
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<title>Federal Register, Volume 90 Issue 65 (Monday, April 7, 2025)</title>
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[Federal Register Volume 90, Number 65 (Monday, April 7, 2025)]
[Notices]
[Pages 15001-15002]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-05923]
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ENVIRONMENTAL PROTECTION AGENCY
[FRL-12580-01-ORD]
Ambient Air Monitoring Reference and Equivalent Methods;
Designation of Two New Equivalent Methods
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of the designation of two new equivalent methods for
monitoring ambient air quality.
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SUMMARY: Notice is hereby given that the Environmental Protection
Agency (EPA) has designated one new equivalent method for measuring
concentrations of PM<INF>2.5</INF> and one new equivalent method for
measuring PM<INF>10-2.5</INF> in ambient air.
FOR FURTHER INFORMATION CONTACT: Robert Vanderpool, Air Methods and
Characterization Division (MD-D205-03), Center for Environmental
Measurement and Modeling, U.S. EPA, Research Triangle Park, North
Carolina 27711. Phone: 919-541-7877. Email: <a href="/cdn-cgi/l/email-protection#772116191312050718181b592518151205033712071659101801"><span class="__cf_email__" data-cfemail="b8eed9d6dcddcac8d7d7d496ead7daddcaccf8ddc8d996dfd7ce">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION: In accordance with regulations at 40 CFR
part 53, the EPA evaluates various methods for monitoring the
concentrations of those ambient air pollutants for which EPA has
established National Ambient Air Quality Standards (NAAQS) as set forth
in 40 CFR part 50. Monitoring methods that are determined to meet
specific requirements for adequacy are designated by the EPA as either
reference or equivalent methods (as applicable), thereby permitting
their use under 40 CFR part 58 by States and other agencies for
determining compliance with the NAAQS. A list of all reference or
equivalent methods that have been previously designated by EPA may be
found at <a href="http://www.epa.gov/ttn/amtic/criteria.html">http://www.epa.gov/ttn/amtic/criteria.html</a>.
The EPA hereby announces the designation of one new equivalent
method for measuring concentrations of PM<INF>2.5</INF> in ambient air.
This designation is made under the provisions of 40 CFR part 53, as
amended on October 26, 2015 (80 FR 65291-65468).
This new equivalent method for PM<INF>2.5</INF> is an automated
method (monitor) utilizing the measurement principle based on beta
attenuation analysis. This newly designated equivalent method is
identified as follows:
EQPM-1224-264, ``DKK-TOA Models FPM-377C(S), FPM-377C, Particulate
Monitor,'' for monitoring PM<INF>2.5</INF> in Ambient Air (beta
attenuation monitor), configured with a standard EPA PM<INF>10</INF>
inlet (meeting 40 CFR part 50, appendix L specifications) and with
either; a URG-2000-30EGN PM<INF>2.5</INF> cyclone, or BGI
VSCC<SUP>TM</SUP> Very Sharp Cut Cyclone particle size separator, or
Tisch TE-PM<INF>2.5</INF>C cyclone for PM<INF>2.5</INF>, or other
PM<INF>2.5</INF> separator that meets 40 CFR 50 part, appendix L, and
operated with Software Firmware Version FPM4-749840 or later, Corrected
Slope Factor (FACT SLOPE) set to 1.242, Corrected Zero Value (FACT
ZERO) set to 0, and with or without any of the following options: Auto
Check and Serial Recorder. This designation applies to PM<INF>2.5</INF>
measurements only.
This application for an equivalent method determination for this
PM<INF>2.5</INF> method was received by the Office of Research and
Development on October 22, 2023. This monitor is commercially available
from the applicant, DKK-TOA Corporation 29-10, 1-Chome, Takadanobaba,
Shinjuku-ku Tokyo 169-8648, Japan.
The EPA hereby announces the designation of one new equivalent
method for measuring concentrations of PM<INF>10-2.5</INF> in ambient
air. This designation is made under the provisions of 40 CFR part 53,
as amended on October 26, 2015 (80 FR 65291-65468).
This new equivalent method for PM<INF>10-2.5</INF> is an automated
method (monitor) utilizing the measurement principle based on beta
attenuation analysis. This newly designated equivalent method is
identified as follows:
EQPM-1224-265, ``DKK-TOA Models FPM-377C(S), FPM-377C, Particulate
Monitor Pair,'' for the determination of coarse particulate matter as
PM<INF>10-2.5</INF>, consisting of a pair of DKK-TOA monitors, with one
being the approved PM<INF>10</INF> monitors (EQPM-0905-156) and the
other being the approved PM<INF>2.5</INF> monitors (designation EQPM-
1224-264). The monitors are collocated with
[[Page 15002]]
1-4 meters of one another and are concurrently operated. Both monitors
are operated in accordance with their associated Operating Manual. This
designation applies to PM<INF>10-2.5</INF> measurements only.
This application for an equivalent method determination for this
PM<INF>10-2.5</INF> method was received by the Office of Research and
Development on December 23, 2024. This monitor is commercially
available from the applicant, DKK-TOA Corporation 29-10, 1-Chome,
Takadanobaba, Shinjuku-ku Tokyo 169-8648, Japan.
Representative test monitors were tested in accordance with the
applicable test procedures specified in 40 CFR part 53, as amended on
October 26, 2015. After reviewing the results of those tests and other
information submitted by the applicant, EPA has determined, in
accordance with 40 CFR part 53, that these methods should be designated
as equivalent methods.
As designated equivalent methods, these methods are acceptable for
use by states and other air monitoring agencies under the requirements
of 40 CFR part 58, Ambient Air Quality Surveillance. For such purposes,
these methods must be used in strict accordance with the operation or
instruction manual associated with these methods and subject to any
specifications and limitations (e.g., configuration or operational
settings) specified in the designated method descriptions (see the
identification of the methods above).
Use of these methods should also be in general accordance with the
guidance and recommendations of applicable sections of the ``Quality
Assurance Handbook for Air Pollution Measurement Systems, Volume I,''
EPA/600/R-94/038a and ``Quality Assurance Handbook for Air Pollution
Measurement Systems, Volume II, Ambient Air Quality Monitoring
Program,'' EPA-454/B-13-003, (both available at <a href="https://www.epa.gov/ttn/amtic/qalist.html">https://www.epa.gov/ttn/amtic/qalist.html</a>). Provisions concerning modification of such
methods by users are specified under section 2.8 (Modifications of
Methods by Users) of appendix C to 40 CFR part 58.
Consistent or repeated noncompliance with any of these conditions
should be reported to: Director, Air Methods and Characterization
Division (MD-D205-03), Center for Environmental Measurement and
Modeling, U.S. Environmental Protection Agency, Research Triangle Park,
North Carolina 27711.
Designation of these equivalent methods is intended to assist the
States in establishing and operating their air quality surveillance
systems under 40 CFR part 58. Questions concerning the commercial
availability or technical aspects of these methods should be directed
to the applicant.
Alice Gilliland,
Acting Director, Center for Environmental Measurement and Modeling.
[FR Doc. 2025-05923 Filed 4-4-25; 8:45 am]
BILLING CODE P
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