[Federal Register Volume 59, Number 108 (Tuesday, June 7, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-13787]
[[Page Unknown]]
[Federal Register: June 7, 1994]
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ENVIRONMENTAL PROTECTION AGENCY
Office of Research and Development
[FRL-4893-4]
Ambient Air Monitoring Reference and Equivalent Methods;
Equivalent Method Designation
Notice is hereby given that EPA, in accordance with 40 CFR part 53,
has designated another equivalent method for the determination of lead
in suspended particulate matter collected from ambient air. The new
designated method is identified as follows:
EQL-0694-096, ``Determination of Lead Concentration in Ambient
Particulate Matter by Inductively Coupled Argon Plasma Optical
Emission spectrometry (State of West Virginia).''
The applicant's request for an equivalent method determination for
the above method was received on March 28, 1994.
This method has been tested by the applicant, the State of West
Virginia, in accordance with the test procedures prescribed in 40 CFR
part 53. After reviewing the results of these tests, EPA has
determined, in accordance with part 53, that this method should be
designated as an equivalent method. The information submitted by the
applicant will be kept on file at EPA's Atmospheric Research and
Exposure Assessment Laboratory, Research Triangle Park, North Carolina,
and will be available for inspection to the extent consistent with 40
CFR part 2 (EPA's regulations implementing the Freedom of Information
Act).
This method uses the sampling procedure specified in the reference
method for the determination of lead in suspended particulate matter
collected from ambient air (43 FR 46258). Lead in the particulate
matter is solubilized by extraction with a mixture of nitric acid and
hydrochloric acid, facilitated by heat and ultrasonication. The lead
content of the sample is analyzed by a Thermo Jarrel Ash AtomScan 16
inductively coupled argon plasma optical emission spectrometer using
the 220.3 nm lead emission line and instrument conditions optimized by
the user laboratory. Technical questions concerning the method should
be directed to the State of West Virginia, Department of Commerce,
Labor and Environmental Resources, Division of Environmental
Protection, Office of Air Quality, 1558 Washington Street East,
Charleston, West Virginia 25311-2599.
As a designated equivalent method, this method is acceptable for
use by states and other control agencies under requirements of 40 CFR
part 58, Ambient Air Quality Surveillance. For such purposes the method
must be used in strict accordance with the procedures and
specifications provided in the method description. States or other
agencies using inductively coupled argon plasma optical emission
spectrometric methods that employ procedures and specifications
significantly different from those in this method must seek approval
for their particular method under the provisions of Sec. 2.8 of
Appendix C to 40 CFR Part 58 (Modification of Methods by Users) or may
seek designation of such methods as equivalent methods under the
provisions of 40 CFR part 53.
Additional information concerning this action may be obtained from
Frank F. McElroy, Methods Research and Development Division (MD-77),
Atmospheric Research and Exposure Assessment Laboratory, U.S.
Environmental Protection Agency, Research Triangle Park, North Carolina
27711, telephone (919) 541-2622.
Carl Gerber,
Acting Assistant Administrator for Research and Development.
[FR Doc. 94-13787 Filed 6-6-94; 8:45 am]
BILLING CODE 6560-50-M
