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Clearing the air

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<title>Clearing the air</title>
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<title>Safety & health</title>
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<name type="personal" usage="primary" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MAPA20080109790">
<namePart>Naso, Markisan</namePart>
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<dateIssued encoding="marc">2003</dateIssued>
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<abstract>OSHA established permissible  exposure limits, or PELs, for nearly 500 air contaminants, based on research conducted in the 1950s and 1960s. </abstract>
<note type="statement of responsibility">By Markisan Naso</note>
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<topic>Riesgo químico</topic>
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<topic>Contaminación del aire</topic>
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<topic>Contaminantes químicos</topic>
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<title>Safety & health</title>
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<publisher>Itasca</publisher>
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<part>
<text>Vol. 167, nº 4, April 2003 ; p. 32-36</text>
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