Solution-What is the eight hour twa concentration

What is the eight hour twa concentration

Reference no: EM131355986

Question: A series of full-period consecutive dust samples are collected during an 8-hour work shift. Samples were collected on filters and weighed gravimetrically, with results as follow:

Sample no:	Flowrate	Sample Duration	Mass Collected
	(liters per min)	(min)	(micrograms)
1	2	60	110
2	2	120	745
3	2	90	350
4	2	120	700
5	2	90	255

What is the 8 hour TWA concentration in milligrams per cubic meter (mg/m³)?

Think very carefully how you might do this. The final units are in mg/m³. You have mass in ug. You also have minutes and liters per minute. That should tell you how many liters of air were sampled. Airborne concentration is in mass per volume of air. You can calculate ug/l. Convert to mg/m3 and then calculate the 8 hour TWA (show all work).

Reference no: EM131355986

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What is the eight hour twa concentration : What is the Eight hour TWA concentration in milligrams per cubic meter (mg/m3) - Think very carefully how you might do this. The final units are in mg/m3. You have mass in ug. You also have minutes and liters per minute. That should tell you how ma..

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What is the eight hour twa concentration

Reference no: EM131355986

Reference no: EM131355986

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