[Federal Register Volume 76, Number 55 (Tuesday, March 22, 2011)]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-6681]
ENVIRONMENTAL PROTECTION AGENCY
Office of Research and Development; Ambient Air Monitoring
Reference and Equivalent Methods: Designation of Four New Equivalent
AGENCY: Environmental Protection Agency.
ACTION: Notice of the designation of four new equivalent methods for
monitoring ambient air quality.
SUMMARY: Notice is hereby given that the Environmental Protection
Agency (EPA) has designated, in accordance with 40 CFR Part 53, four
new equivalent methods: One each for measuring concentrations of
PM2.5 and lead (Pb) and two for measuring concentrations of
PM10 in the ambient air.
FOR FURTHER INFORMATION CONTACT: Robert Vanderpool, Human Exposure and
Atmospheric Sciences Division (MD-D205-03), National Exposure Research
Laboratory, U.S. EPA, Research Triangle Park, North Carolina 27711. E-
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 (NAAQSs) 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 methods or equivalent methods (as applicable), thereby
permitting their use under 40 CFR Part 58 by States and other agencies
for determining compliance with the NAAQSs.
The EPA hereby announces the designation of four new equivalent
methods for measuring pollutant concentrations in the ambient air: One
for PM2.5, one for Pb, and two for PM10. These
designations are made under the provisions of 40 CFR Part 53, as
amended on June 22, 2010 (75 FR 35597).
The new PM2.5 equivalent method is an automated
monitoring method (analyzer) utilizing a measurement principle based on
active sampling of ambient aerosols and contemporaneous analysis by
means of a light-scattering technique for determination of particle
size and mass concentration. The newly designated equivalent method is
identified as follows:
EQPM-0311-195, ``Grimm Technologies, Inc. Model EDM 180
PM2.5 Monitor,'' light scattering continuous ambient
particulate monitor operated for 24 hours at a volumetric flow rate
of 1.2 L/min, configured with a Nafion[reg]-type air sample dryer,
complete for operation with firmware version 7.80 or later, in
accordance with the Grimm Technologies, Inc. Model EDM 180 Operation
and Instruction Manual. The optional graphic presentation can be
made with the software model 1.177 version 3.30 or later.
The application for an equivalent method determination for this
candidate method was received by the EPA on April 6, 2010. The monitor
is commercially available from the applicant, GRIMM Technologies, Inc.,
5833 Stewart Parkway, Suite 203, Douglasville, GA 30153.
It should be noted that this Grimm Model EDM 180 PM2.5
Monitor is not only a semi-continuous PM2.5 analyzer but it
is also the first equivalent method designated by EPA that is based on
an optical measurement technique and, further, one that does not
involve inertial separation of particles in the PM2.5 size
range or collection of the PM2.5 on a particle filter.
Because this new measurement approach is being approved for NAAQS
compliance measurements for the first time, users are encouraged to
consider the special nature of this method when introducing it into a
SLAMS PM2.5 monitoring network. The EPA Regional Offices can offer
guidance in this regard.
The new equivalent method for Pb is a manual method that uses the
sampling procedure specified in the EPA Reference Method for total
suspended particulate matter (TSP) (High-Volume Method, 40 CFR Part 50,
Appendix B), with a particular extraction and analytical procedure. The
method is identified as follows:
EQL-0311-196, ``Heated Ultrasonic Nitric and Hydrochloric Acid
Digestion and ICP/AES Analysis for Lead (Pb) on TSP High-Volume
Filters.'' A sample of total suspended particulate matter (TSP) is
collected on a glass fiber filter, using the sampler and procedure
of the EPA Reference Method for the Determination of Suspended
Particulate Matter in the Atmosphere (High-Volume Method) (40 CFR
50, Appendix B). The TSP sample is extracted with a solution of
nitric and hydrochloric acid, heated in an ultrasonic bath to 80
[deg]C for one hour, and brought to a final volume of 40 mL. The
lead content of the sample extract is analyzed by Inductively
Coupled Plasma-Atomic Emission Spectrometry (ICP-AES), based on EPA
SW-846 Method 6010C.
The application for an equivalent method determination for this
method was submitted by the Office of Air Quality Planning and
Standards, U.S. Environmental Protection Agency, Research Triangle
Park, NC 27711 and was received by the Office of Research and
Development on June 24, 2010. The method description is available at
The two new equivalent methods for PM10 are both manual,
gravimetric sampling methods employing a particulate sampler configured
for dual filter sampling and using a virtual impactor to separate the
fine and coarse PM fractions for collection on separate filters. The
two newly designated PM10 methods are identified as follows:
EQPS-311-197, ``Thermo Scientific Partisol[supreg] 2000-D
Dichotomous Air Sampler,''
configured for dual-filter, single-event sampling of fine
(PM2.5) and coarse (PM10-2.5) particles, using
a virtual impactor to separate fine and coarse PM into two samples
for collection on two separate filter membranes, operated for a 24-
hour sample period and in accordance with the Thermo Scientific
Partisol[supreg] 2000-D Dichotomous Operating Manual.
EQPS-0311-198, ``Thermo Scientific Dichotomous Partisol[supreg]-
Plus Model 2025-D Sequential Air Sampler,'' configured for dual-
filter sampling of fine (PM2.5) and coarse
(PM10-2.5) particles, using a virtual impactor to
separate the fine and coarse PM into two samples for collection on
two separate filter membranes, and operated with the modified filter
shuttle mechanism implemented May 31, 2008 and firmware version
1.500, or later, for 24-hour continuous sample periods and in
accordance with the Dichotomous Partisol[supreg]-Plus Model 2025-D
Sequential Air Sampler Operating Manual.
Applications for equivalent method determinations for these
candidate methods were received by the EPA on September 7, 2010. The
samplers are commercially available from the applicant, Thermo Fisher
Scientific, Air Quality Instruments, Environmental Instruments
Division, 27 Forge Parkway, Franklin, MA 02038.
The analytical procedure for the Pb method and the test analyzers
or samplers representative of the other methods have been tested in
accordance with the applicable test procedures specified in 40 CFR Part
53 (as amended on June 22, 2010). After reviewing the results of those
tests and other information submitted by the applicants in the
respective applications, EPA has determined, in accordance with Part
53, that these methods should be designated as equivalent methods. The
information submitted by the applicants in the respective applications
will be kept on file, either at EPA's National Exposure Research
Laboratory, Research Triangle Park, North Carolina 27711 or in an
approved archive storage facility, and will be available for inspection
(with advance notice) to the extent consistent with 40 CFR Part 2
(EPA's regulations implementing the Freedom of Information Act).
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,
each method must be used in strict accordance with the operation or
instruction manual or standard operating procedure associated with the
method and subject to any specifications and limitations (e.g.,
configuration or operational settings) specified in the applicable
designated method description (see the identifications of the methods
Use of the 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-08-003, December, 2008 (available at http://www.epa.gov/ttn/amtic/qalist.html). Vendor modifications of a
designated equivalent method used for purposes of Part 58 are permitted
only with prior approval of the EPA, as provided in Part 53. 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
In general, a method designation applies to any sampler, analyzer,
or method which is identical to the sampler, analyzer, or method
described in the application for designation. In some cases, similar
samplers or analyzers manufactured prior to the designation may be
upgraded or converted (e.g., by minor modification or by substitution
of the approved operation or instruction manual) so as to be identical
to the designated method and thus achieve designated status. The
manufacturer should be consulted to determine the feasibility of such
upgrading or conversion.
Part 53 requires that sellers of designated reference or equivalent
method analyzers or samplers comply with certain conditions. These
conditions are specified in 40 CFR 53.9.
Aside from occasional breakdowns or malfunctions, consistent or
repeated noncompliance with any of these conditions should be reported
to: Director, Human Exposure and Atmospheric Sciences Division (MD-
E205-01), National Exposure Research Laboratory, U.S. Environmental
Protection Agency, Research Triangle Park, North Carolina 27711.
Designation of these new 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 the methods should be directed to
Jewel F. Morris,
Acting Director, National Exposure Research Laboratory.
[FR Doc. 2011-6681 Filed 3-21-11; 8:45 am]
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