American Conference of Governmental Industrial Hygienists (ACGIH®), your industrial hygiene, environmental, occupational health and safety resource that advances worker health and safety and offers books, conferences, and education and training courses.

Site MapContact UsFAQsHome


Search  
Advanced

AboutProductsMembershipEducationTLV/BEI ResourcesFoundationResources
Sign up for the ACGIH.ORG Mailing List

Products


Continuing Education — "The Action Level!®"

VOLUME 6(4), April 2009
Journal of Occupational and Environmental Hygiene


Provide FULL NAME and EMAIL information below, then answer the questions and click "Submit".

Full Name:
E-Mail:

CASE STUDIES:

Concentrations of Bioaerosols, Odors and Hydrogen Sulfide Inside and Downwind from Two Types of Swine Livestock Operations
Peter S. Thorne, Anne Ansley and Sarah Spencer Perry

1. Which of the following statements about endotoxin
    concentrations inside the swine operations is TRUE?

a. Approximately one-third of the endotoxin
          measurements were below the limit of detection.
b. All but one measured endotoxin concentration
          exceeded the no observed effect level.
c. Endotoxin concentrations in confinement
          building were on average 10-fold higher than hoop
          barns.
d. Endotoxin concentrations were highest in samples
          taken in the summer.
e. All of the above are false.
2. Which one of the following statements is FALSE?
a. Analysis of variance models demonstrated
          that barn type was a significant determinant of
          in-barn concentration for endotoxin, inhalable
          particulate, odor threshold, and total microbes.
b. Analysis of mesophilic bacteria using either
          TSA or R2A yielded very similar profiles upwind,
          inside and downwind for both barn types.
c. Analysis of variance models demonstrated that
          season was a significant determinant of
          in-barn concentration for endotoxin, odor
          threshold, TSA mesophilic bacteria, and total
          microbes, but not inhalable particulates.
d. The geometric mean odor threshold 160 m
          downwind of the conventional confinements
          was less than the 7 dilutions concentration
          (i.e., 7:1) used as an action level by some states.
e. Geometric mean endotoxin concentrations
          were significantly higher 160 m downwind of hoop
          barns than 30 m upwind.
Measurements of Airborne Methylene Diphenyl Diisocyanate Concentration (MDI) in the U.S. Workplace
Karroll Booth, Barbara Cummings, William J. Karoly, Sharon Mullins, William P. Robert, Mark Spence, Fran W. Lichtenberg and J. Banta

3. Use of filter paper sampling methods is recommended
    in preference to impinger methods when conducting air
    monitoring for MDI in fast-reacting, two-component (MDI/
    polyol), spray-applied systems. True or False?

True
False
4. When monitoring for airborne MDI using validated methods,
    the analytical results obtained can vary depending on:
a. Whether the samples are analyzed within
          3 days or 5 days of receipt by the lab.
b. Whether filter paper or impinger sampling
          methods are used.
c. Whether the manufacturing processes are
          open or closed systems.
d. a and b
e. b and c
Effectiveness of Common Shelter-in-Place Techniques in Reducing Ammonia Exposure Following Accidental Release
Brett Tarkington, Angela J. Harris, Paul Barton, Ben Chandler and Phillip T. Goad

5. The "shelter in place" strategy evaluated in this study would
    be most effective for which set of chemicals?

a. toluene, benzene, xylenes
b. vinyl chloride, gasoline, cyclohexane
c. acetone, methanol, formaldehyde
d. toluene, benzene, chlorine
6. The use of a damp or wet cloth over the mouth and nose
    would effectively reduce exposure to non-water soluble chemical
    warfare agents. True or False?
True
False
Respirator Physiological Effects under Simulated Work Conditions
Siddharth Bansal, Philip Harber, David Yun, David Liu, Yihang Liu, Samantha Wu, David Ng and Silverio Santiago

7. Respiratory personal protective equipment (respirators) may
    be more widely recommended by health and safety professionals
    due to:

a. Infectious epidemics
b. Terrorism concerns
c. Extensive natural disasters
d. All of the above
e. None of the above
8. The study results suggest that half face mask dual cartridge
    respirators produce major physiologic effects that make
    recommended use by the general community unwise.
    True or False?
True
False
Volatile Organic Compounds and Formaldehyde as Explaining Factors for Sensory Irritation in Office Environments
H. Salonen, A.-L. Pasanen, S. Lappalainen, H. Riuttala, T. Tuomi, P. Pasanen, B. Bäck and K. Reijula

9. The RIL for formaldehyde is 4 µg/m3. True or False?

True
False
10. The indoor air concentrations measured for single VOCs are
      typically several orders of magnitude below the estimated RILs.
      True or False?
True
False

Be sure FULL NAME and EMAIL information is provided at the top of this page before submitting your answers.


Deadline for answers is April 30, 2009.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on May 11, 2009.

 
MEMBERS ONLY: Link to FREE Online Access to JOEH

MEMBERS ONLY: Link to Applied Archives

Register for "The Action Level!®"

Answer "The Action Level!®" Questions

View "The Action Level!®" Answers

JOEH Feedback Form

JOEH Helpline Info

Submit an Article

 

Last update on 02/12/2009. Questions or problems? Please contact us. © 2013 American Conference of Governmental Industrial Hygienists, 1330 Kemper Meadow Drive, Cincinnati, Ohio 45240, 513-742-2020. ACGIH® and related marks are marks of the American Conference of Governmental Industrial Hygienists. All Rights Reserved. Terms of Access. ACGIH® Privacy Policy. Site Map.