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200 1 $aSurface analysis$ethe principal techniques$fedited by John C.Vickerman
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610   $aTecnologia delle superfici Analisi
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200 10$aToxic chemicals$b[electronic resource] $eEPA's new assessment process will increase challenges EPA faces in evaluating and regulating chemicals : testimony before the Committee on Environment and Public Works, U.S. Senate /$fstatement of John B. Stephenson
210  1$a[Washington, D.C.] :$cU.S. Govt. Accountability Office,$d[2008]
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320   $aIncludes bibliographical references.
330   $aThis testimony highlights GAO's work on toxic substances, focusing on (1) its March 2008 report, Chemical Assessments: Low Productivity and New Interagency Review Process Limit the Usefulness and Credibility of EPA's Integrated Risk Information System and (2) key changes to the IRIS assessment process EPA included in its revised IRIS assessment process released on April 10, 2008. It also highlights the findings of two GAO reports on EPA's regulation of toxic chemicals.
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