Reference no: EM131210187
Industrial Hygiene Sampling Practices and Techniques
Lab
Assignment:
Each student is responsible for collecting a particulate 8-hour sample using NIOSH Analytical Method 0600. This sample may be collected as a personal or area sample.
Equipment needed:
• 1 air sampling pump and sampling train calibrated to an adequate flow rate
• 2 cassettes loaded with pre-weighed PVC filters and back-up pads (1 for sampling and 1 for a field blank)
• Cyclone
• Mettler Scale
Submission:
Must contain the following information:
• Objective
• Methodology
• Data
• Calculations to determine concentrations
• Conclusions
• Recommendations
Procedure:
Students shall weigh 10 PVC filters and record the post weight of each filter. The student shall then use the following data to identify the TWA for Employee A and Employee B.
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Trial
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Pre Sample reading
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Post reading
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1
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2.5071
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2.4675
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2
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2.5082
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2.4842
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3
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2.5036
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2.4847
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4
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2.5036
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2.4846
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5
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2.5048
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2.4974
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6
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2.5026
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2.4908
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7
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2.5001
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2.4846
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8
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2.5119
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2.4829
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9
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2.5114
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2.4780
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10
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2.5071
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2.4816
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Employee A
Sampling pump calibration data:
Pre-Calibration - 2.5052 liters per minute
Post Calibration - 2.4638 liters per minute
Average calibration is (2.5052 L+2.4638 L)/2=2.4845 L → 2.45/1000=.00248 m3
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Pre-Weight
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Sampling Time
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Post weight
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Volume
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13.12 mg
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480 min
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15.91 mg
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0.00248*480=1.19 m3
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Blank X 13.39 mg
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14.52 mg
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• (15.91 mg-13.12 mg) - (14.52 mg-13.39)/1.19 m3 = 1.39 mg/m3
TWA= (1.39 mg/m3*(480)/480=1.39 mg/m3
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