CIH · Sample
Certified Industrial Hygienist
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CIH-D1-Q049Exposure Assessmentintermediate
A manufacturing worker is exposed to both toluene (measured TWA: 60 ppm; TLV-TWA: 20 ppm) and xylene (measured TWA: 40 ppm; TLV-TWA: 100 ppm). Both solvents affect the central nervous system through the same mechanism. What is the combined hazard index (HI) and what does it indicate?
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