OSH 6302 CSU Advanced Industrial Hygiene Chemical Hazard Exposures Analysis – Description

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 ”g

30 L (15-minute)

 

Copper Fume

140 ”g

960 L (8-hour)

 

Lead Fume

40 ”g

960 L (8-hour)

 

1,2,4 trimethylbenzene

5 ”g

48 L (8-hour)

 

Toluene

125 ”g

48 L (8-hour)

 

Xylene

20 ”g

48 L (8-hour)

 

Metal Working Fluids

500 ”g

720 L (8-hour)

  

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)

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.

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.

Textbook

Fuller, T. P. (2015). Essentials of Industrial Hygiene. National Safety Council (NSC). https://online.vitalsource.com/books/9780879123369

Reading Assignment

Chapter 6: Gases and Vapors, pp. 114–121

Chapter 7: Aerosols, pp. 138–144

Chapter 11: Noise, pp. 238–247

The post OSH 6302 CSU Advanced Industrial Hygiene Chemical Hazard Exposures Analysis first appeared on .