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ETV conducted a performance verification test of four field-portable technologies for the
measurement of lead in dust at Capital Community Technical College, in Hartford, CT, November 5
through 9, and one additional technology January 7 through 9 at Oak Ridge National Laboratory.
Reports are posted here. Two additional technologies will be evaluated at the EPA Region 1 Laboratory
in North Chelmsford, MA, in November 2002.
A strong technical panel of the nation's experts in this area are assisting with the design of the verification test and the reporting of results. The panel includes representation from the U.S. Department of Housing and Urban Development, the National Institute for Occupational Safety and Health, the National Institute of Standards and Technology, Research Triangle Institute, the American Industrial Hygiene Association, the Massachusetts Childhood Lead Poisoning and Prevention Program, and several EPA offices, including the Office of Pollution Prevention and Toxics (OPPT).
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The verification tests consists of vendors of commercially available portable technologies,
capable of measuring lead on dust wipe samples, operating their equipment in a field setting.
The types of
technologies include x-ray fluorescence instruments (XRF) and anodic stripping voltammetry systems (ASV). The
vendors blindly analyzed 160 dust wipe samples containing known amounts of lead, ranging in
concentration from 2 to 1500 µg/wipe. The samples included wipes archived from previous rounds of
testing under the Environmental Lead Proficiency Analytical Testing program (ELPAT). These samples
were prepared from dust collected in households in North Carolina and Wisconsin. Also, newly-prepared samples
were acquired from the University of Cincinnati. These dust wipe samples were
prepared from National Institute of Standards and Technology (NIST) Standard Reference Materials
(SRMs).
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