Chapter_03_Corrected_Figure_3_1 - 20 40 60 80 100 120 140...

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Example – How to determine if there is a violation of the exposure limits or standards. Note : Here we use ACGIH TLV standards, which are not enforceable. However, the same kind of analysis can be performed with OSHA PEL values, which are enforceable. [ Note : The plot in the text has an error, namely the horizontal axis shows nine rather than eight hours of data. The plot is corrected below.]
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Unformatted text preview: 20 40 60 80 100 120 140 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 time of day PPM 8-hour average 15-min average instantaneous TLV-C TLV-TWA TLV-STEL Figure 3.1 Instantaneous and running 15-minute average mol fraction of a contaminant compared to ACGIH standards for an 8-hour work day....
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