Unit V Homework
Assignment
Welding fumes are a common occupational exposure. Several
different welding fumes can cause similar adverse health effects. Personal
sampling of a welding operation at a manufacturing facility produced the
following 8-hour time-weighted average (TWA) results for individual metal
fumes.
Metal Fume
Result
OSHA PEL
ACGIH TLV
Antimony
0.05 mg/m³
0.5 mg/m³
0.5 mg/m³
Beryllium
0.00001 mg/m³
0.002 mg/m³
0.00005 mg/m³ (I)
Cadmium
0.025 mg/m³
0.1 mg/m³
0.01 mg/m³
Chromium
0.02 mg/m³
1 mg/m³
0.5 mg/m³
Copper
0.03 mg/m³
0.1 mg/m³
0.2 mg/m³
Iron Oxide
0.5 mg/m³
10 mg/m³
5 mg/m³ (R)
Magnesium Oxide
0.02 mg/m³
15 mg/m³
10 mg/m³
Molybdenum
0.003 mg/m³
15 mg/m³
10 mg/m³ (I)
BOS 4301, Industrial Hygiene
3
Nickel
0.25 mg/m³
1 mg/m³
1.5 mg/m³ (I)
Zinc Oxide
0.3 mg/m³
5 mg/m³
2 mg/m³ (R)
(R) Respirable
fraction (I) Inhalable fraction
Briefly summarize the primary health effects associated with
overexposure to each type of metal fume, including both acute and chronic
health effects. Explain what analytical methods you would use for evaluating health
hazards in the workplace.Identify the types of metal fumes that would produce
similar health effects on an exposed worker. Calculate the equivalent exposure
(in relation to OSHA PELS) for the metal fumes with similar health effects
based on the “Result” column in the table above. Discuss whether you believe
any of the individual metal fume exposures or the combined exposure exceeds an
OSHA PEL or an ACGIH TLV.
Your homework assignment should be a minimum of two pages in
length.
Information about accessing the grading rubric for this
assignment is provided below.
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