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Continuing Education — "The Action Level!®"

VOLUME 9(5), May 2012
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Submicron Particle Monitoring of Paving and Related Road Construction Operations
Alice Freund, Norman Zuckerman, Lisa Baum and Debra Milek

1. Which of the following exposures are of concern to highway
    repair workers?

a. diesel exhaust
b. asphalt fumes
c. silica dust
d. all of the above
2. What was measured, and found elevated, by the
    condensation particle counter used in this study?
a. PM2.5
b. ultrafine and sub-micron particles
c. silica dust
d. respirable dust
Determinants of Atrazine Contamination in the Homes of Commercial Pesticide Applicators across Time
Matthew J. Lozier, Brian Curwin, Marcia G. Nishioka and Wayne Sanderson

3. Which of the following determinants was not associated
    with a significant reduction in atrazine loading in the homes
    of commercial pesticide applicators?

a. handling less atrazine
b. mixing/loading atrazine vs. atrazine application
c. vacuuming more frequently
d. changing out of work shoes outside
4. Which of the locations where sampling took place had
    the highest atrazine loading?
a. Kitchen
b. Master bedroom
c. Living room
d. Entryway
Evaluation of the Potential Airborne Release of Carbon Nanofibers During the Preparation, Grinding, and Cutting of Epoxy-Based Nanocomposite Material
M. Methner, C. Crawford and C. Geraci

5. The lowest particle number concentration occurred during
    the surface grinding operation. True or False?

True
False
6. During wet saw cutting operations with no ventilated
    enclosure, general room contamination was evident
    and was primarily due to:
a. CNF-containing aerosol spun off of rotating
          diamond-blade
b. visiting co-workers
c. a faulty general ventilation duct
Air and Blood Lead Levels in Lead Acid Battery Recycling and Manufacturing Plants in Kenya
Faridah H. Were, Geoffrey N. Kamau, Paul M. Shiundu, Godfrey A. Wafula and Charles M. Moturi

7. Provision of respirator devices to the workers in lead
    manufacturing facilities is the best way of protecting them
    from excessive lead exposure prior to respiratory protection
    training program. True or False?

True
False
8. Workers who wash their hands before smoking prevent
    occupational exposure of inorganic lead mainly through
    _________________________.
a. inhalation
b. ingestion
c. dermatological
Evaluation of Portable Single Gas Monitors for the Detection of Low Levels of Hydrogen Sulfide and Sulfur Dioxide in Petroleum Industry Environments
M.A. Hemingway, P.T. Walsh, K.R. Hardwick and G. Wilcox

9. In general, personal H2S and SO2 monitors' alarm points
    should be set to the new TLV® of 1 ppm and 0.25 ppm,
    respectively. True or False?

True
False
10. Personal H2S and SO2 monitors can be affected by
      other gases or vapours. True or False?
True
False
Office Workers' Sick Building Syndrome and Indoor Carbon Dioxide Concentrations
Dai-Hua Tsai, Jia-Shiang Lin and Chang-Chuan Chan

11. Which combination would be most likely to indicate
      symptoms?

a. Carbon dioxide > 800 ppm, afternoons,
          female workers
b. Carbon dioxide > 100 ppm, mornings,
          female workers
c. Carbon dioxide > 100 ppm, afternoons,
          male workers
12. Strategies emerged from this study in terms of temperature
      and relative humidity as predictors of symptoms. True
      or False?
True
False
Airborne Isocyanate Exposures in the Collision Repair Industry and a Comparison to Occupational Exposure Limits
Carolyn Reeb-Whitaker, Stephen G. Whitaker, Diana M. Ceballos, Elisa C. Weiland, Sheila L. Flack, Kenneth W. Fent, Jennifer M. Thomasen, Linda G. Trelles Gaines and Leena A. Nylander-French

13. Half face air purifying respirators would likely prove sufficient
      for the tasks indicated in this article. True or False?

True
False
14. In conclusion, the variable mixtures of isocyanates used
      by auto body painters suggest that an occupational exposure
      limit is required that includes all polyisocyanates. True
      or False?
True
False

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Deadline for answers is May 31, 2012.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on June 8, 2012.

 
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