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HW# 8. Suppose a worker is exposed to Dioxane and Carbon Dioxide during an 8-hour workday with the times and concentrations listed below. Dioxane Exposure Carbon Dioxide From/To Exposure (ppms) (ppms) 8:00 till 9:30 3500 9:30 till 10:00 5000 10:00 till 11:00 60 2500 60 2400 11:00 till Noon 3600 noon till 3:00 3:00 till 4:00 4200 What are the TWAs for each chemical exposure? Has the PEL has been exceeded for any individual chemical? Has the PEL has been exceeded for the combination of chemicals? What about the AL, has it been exceeded?
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Timetn minute DioxgneCo2 8 :oo till q:30 9 30l lo00 lo:oo ll00 3Soo 5500 2 SoD 240つ 36ơ ncon hl 2:00 0 4:00 8o YS TwA_, TimeGo x42c0 480 minu e 1659ooo ppm 480 3456.25 ppm . Permissib le expaln (imit EL) No, PEL has not been exceeded fos any in diviTwA or Dioxane etposure f% 8 hours- 54 68 PPM PEL- loo Pp m PEL lao U A 3456 2S ppm 3456 TTJ A P EL 69 12s 23.8os As Total >1PELIS exceed fos mbinabion fhan AL also exaeded

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