[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]
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