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Continuing Education — "The Action Level!®"

VOLUME 1(9), September 2004
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Analytical Techniques and Method Validation for the Measurement of Selected Semi-Volatile and Non-Volatile Organofluorochemicals in Air
William Reagen

1. The OSHA Versatile Sampler (OVS) tube contains a filter followed
    by two sorbent sections, and as such can sample both particulate
    and vapor phases of a chemical in air but phase distribution
    cannot always be assessed. True or False?

True
False
2. Which validation parameter(s) is/are used to assess maximum
    sample retention on sorbent media before breakthrough during
    the process of air sampling?
a. Analytical Recovery
b. Storage Stability
c. Sampler Capacity
d. All of the above
Modeling the Chemical Protective Performance of NBC Clothing Material
Paul Brasser

3. Are commonly used equations, which describe the vapour
    concentration inside a filter as a function of the axial position in
    the filter, applicable to carbon bead type fabrics (NBC clothing)?

a. Yes
b. No
c. Only in the initial stage of the breakthrough
          concentration — time curve.
4. It is possible to relate the breakthrough concentration curve in time
    of vapour through carbon bead type fabrics (NBC clothing) to
    parameters like the air velocity through the clothing, the type of
    agent and the challenge concentration. True or False?
True
False
Characterizing Emission and Breathing-Zone Concentrations Following Exposure Cases to Fluororesin-based Waterproofing Spray Mists
David S. Vernez, Pierre-Olivier Droz, Catherine Lazor-Blanchet and Sylvain Jaques

5. The results obtained imply that a conventional use of the
    waterproofing mixture (using a paintbrush rather than the trigger
    spray) should have prevented the exposure cases during the tile
    coating. True or False?

True
False
6. The outburst of domestic exposure cases observed in Switzerland
    in spring 2003, following the application of leather and textiles
    waterproofing sprays, appears to be independent from the
    occupational exposures investigated in this study. True or False?
True
False

Field Method for the Determination of Insoluble or Total Hexavalent Chromium in Workplace Air
Kyle J. Hazelwood, Pamela L. Drake, Kevin Ashley and Dale Marcy

7. 1,5 diphenylcarbazide is used as a colorimetric reagent for
    hexavalent chromium, based on its reaction with which chromium
    valence state(s)?

a. Cr(0)
b. Cr(II)
c. Cr(III)
d. Cr(VI)
e. All of the above
f. Both Cr(III) and Cr(VI)
8. Strong anion exchange solid phase extraction is used to isolate
    hexavalent chromium from potential interferences, based on its
    being _________________ in weakly basic buffer solution.
a. anionic
b. cationic
c. neutral
d. dissociated
Baseline Measurements of Smoke Exposure Among Wildland Firefighters
Timothy E. Reinhardt and Roger D. Ottmar

9. Smoke exposure has been found to be more of a hazard at
    wildfires than at prescribed burns. True or False?

True
False
10. At wildland fires where workers' potential inhalation exposures are
     found to exceed permissible exposure limits by a factor of 7, why
     would an air purifying respirator with a combination organic vapor
     and N100 cartridge not afford adequate protection against the
     demonstrated inhalation hazards?
a. Because heat from the fire is likely to ruin the
          respirator
b. Because carbon dioxide would not be removed by
          the cartridge and would pose an asphyxiation
          hazard
c. Because the cartridge was not rated R100 or
          P100 — if it were, then the protection would be
          adequate
d. None of the above.
Assessment of the Durability of Medical Examination Gloves
Lesley N. Kerr, Maria P. Chaput, Lisa D. Cash, Louis G. O'Malley, Elmiloudi M. Sarhrani, Joseph C. Teixeira, William S. Boivin and Seth A. Mailhot

11. Presently existing consensus performance standards for medical
     examination gloves address the dynamics of glove use. True or
     False?

True
False
12. In this study, which glove type was found to be the least durable?
a. Nitrile
b. Vinyl
c. Chloroprene
d. Latex
03-0664 Isocyanate Exposures in Autobody Shop Work: The Spray Study
Judy Sparer, Meredith H. Stowe, Dhimiter Bello, Youcheng Liu, Rebecca J. Gore, Fred Youngs, Mark R. Cullen, Carrie A. Redlich and Susan R. Woskie

13. OSHA has PELs for which of the following forms of diisocyanates:

a. hexamethylene diisocyanate (HDI) monomer
b. toluene diisocyanate (TDI) oligomer
c. any molecule containing a free NCO group
d. methylene bisphenyl diisocyanate (MDI) monomer
e. isophorone diisocyanate (IPDI) monomer
14. The highest levels of airborne isocyanates found in autobody shops
      in this study occur during the spray application of primer to the
      vehicles because that is the spray operation most commonly done
      outside the paint spray booths. True or False?
True
False

Answers to the September 2004 "The Action Level!®" Questions
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on October 4, 2004.

 
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