Your
pre-sampling and post-sampling pump calibration using a primary standard
are both 0.05 L/min. You collect a personal sample on an employee working
in the operation. The sample is collected for 460 minutes. Calculate the
sample volume.
The laboratory
reports that the front section of the sample contains 4,500 µg of methyl
n-amyl ketone and the back section contains 100 µg of methyl n-amyl
ketone. Neither the front nor back sections of the field blank you
supplied contain any detectable levels of methyl n-amyl ketone. Calculate
the concentration of the sample in µg/L and mg/m³. Convert the result to
ppm (MW for methyl n-amyl ketone = 114.2). Note: Use the ideal gas
constant of 24.45.
You then
reference OSHA’s Table Z-1 and find that the 8-hour TWA PEL for methyl
n-amyl ketone is 100 ppm. You also look up the ACGIH TLV for methyl n-amyl
ketone and find that the TLV is 50 ppm as an 8-hour TWA exposure. Discuss
how the results of the personal sample you collected compare to the OSHA
PEL and the ACGIH TLV.
Discuss whether
you would recommend comparing the results of your sampling to the OSHA PEL
or the ACGIH TLV. Include your rationale for the choice.
Show
all your work for the calculations for questions 1 and 2. For
questions 3 and 4 should be at least 70 words in length explanation.
Cite the NIOSH
document using APA Style.