The sampling results for the chemical hazards you tested for Acme Automotive Parts (AAP) are listed in the following table. The volumes that are listed are what you provided to the laboratory.

Hazard	Analytical Result	Volume (Time)
Manganese Fume	5 µg	30 L (15-minute)
Copper Fume	140 µg	960 L (8-hour)
Lead Fume	40 µg	960 L (8-hour)
1,2,4 trimethylbenzene	5 µg	48 L (8-hour)
Toluene	125 µg	48 L (8-hour)
Xylene	20 µg	48 L (8-hour)
Metal Working Fluids	500 µg	720 L (8-hour)

For each of the chemical hazards complete the following:

• Calculate the exposure concentration in mg/m³ for the aerosols.
• Calculate the exposure in parts per million (ppm) for the vapors.
• Discuss where you think errors might have been introduced into the results.
• Compare your calculated exposures to one of the occupational exposure limits (OELs) in the table below.
• Do any of the calculated exposures exceed the OEL you chose?
• Discuss why you chose the OELs you used.
• Provide your opinion as to whether the risk associated with each exposure is an acceptable level of risk.

Hazard	Occupational Exposure Limits (OEL)s
Manganese Fume	5 mg/m3 (OSHA Ceiling ) 0.1 mg/m3 (ACGIH 8-hour TWA (I))
Copper Fume	0.1 mg/m3 (OSHA 8-hour TWA) 0.2 mg/m3 (ACGIH 8-hour TWA)
Lead Fume	0.05 mg/m3 (OSHA 8-hour TWA) 0.05 mg/m3 (ACGIH 8-hour TWA
1,2,4 trimethylbenzene	OSHA – None Established 25 ppm (ACGIH 8-hour TWA TLV)
Toluene	200 ppm (OSHA 8-hour TWA) 300 ppm (OSHA Ceiling) 20 ppm (ACGIH 8-hour TWA TLV)
Xylene	100 ppm (OSHA 8-hour TWA) 100 ppm (ACGIH 8-hour TWA
Metal Working Fluids	OSHA – None Established 0.5 mg/m3 (NIOSH 10-hour TWA REL)

The results for the noise sampling in the following table were recorded from your noise dosimeters. All the samples were collected for the full shift using 90 decibels on the A scale (dBA) as the criterion level and a 5 decibels (dB) exchange rate.

Location	Shift Length	Result
Shipping/Receiving	8 hours	78.3 dBA (Lavg)
Hydraulic Press	12 hours	93.0 dBA (Lavg)
Metal Working Line	12 hours	84 dBA (Lavg)
Robotic Welding	12 hours	80.5 dBA (Lavg)
Hand Welding	12 hours	81.3 dBA (Lavg)
Paint Booth	12 hours	79.5 dBA (Lavg)
QA/QC Laboratory	8 hours	70.0 dBA (Lavg)
Final Inspection	8 hours	73.5 dBA (Lavg)

Answer the following for each of the locations listed above:

• Convert the results from dBA to percent. Make sure you show all your work for calculations.
• Which of the results exceeds the OSHA PEL?
• Which of the results exceeds the OSHA action level?
• Provide your opinion as to whether the risk associated with each exposure is an acceptable level of risk.

Your assignment must be at least three pages in length, not counting the title or reference pages. Your assignment must use at least two references.

•