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Continuing Education — "The Action Level!^Ž"

VOLUME 9(3), March 2012
Journal of Occupational and Environmental Hygiene

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CASE STUDIES:

A Radiometry Protocol for UVGI Fixtures Using a Moving-Mirror Type Gonioradiometer
John Zhang, Robert Levin, Robert Angelo, Richard Vincent, Philip Brickner, Peter Ngai and Edward A. Nardell

1. UVGI 254 nm UV-C is used as a control strategy for the
spread of airborne pathogens, including:

a. Beta hemolytic streptococcus and Mycobacterium
tuberculosis
b. E. Coli and influenza viruses
c. Mycobacterium tuberculosis and influenza viruses
d. Influenza viruses and beta hemolytic
streptococcus

2. Exposure of humans to excessive UV-C radiant energy must
    be avoided in plans for incorporation of UV fixtures and lamps
    in public settings. UV-C exposure would be most likely
    to cause:

a. Ocular effects and skin damage
b. Skin damage and brain tumors
c. Kidney failure and ocular effects
d. Brain tumors and kidney failure

Asphalt Fume Exposure Levels in North American Asphalt Production and Roofing Manufacturing Operations
Charles W. Axten, William E. Fayerweather, David C. Trumbore, Dennis J. Mueller and Arthur F. Sampson, III

3. Exposure to asphalt fumes is markedly higher in facilities
producing organic felts as compared to those producing
fiberglass mats. True or False?

True
False

4. Substantial compliance with the ACGIH^Ž TLV^Ž for BSF using
    currently available controls appears possible within roofing
    sectors engaged in asphalt processing and for those
    manufacturing inorganic asphalt shingles and rolls. True
    or False?

True
False

N95 Filtering Facepiece Respirator Deadspace Temperature and Humidity
Raymond J. Roberge, Jung-Hyun Kim and Stacey Benson

5. N95 filtering facepiece respirators equipped with an exhalation
    valve decrease the respirator dead space humidity significantly
    as compared to models without an exhalation valve. True
    or False?

True
False

6. After two hours of continuous use at a low-moderate work rate,
    N95 filtering facepiece respirators with an exhalation valve retain
    less exhaled moisture than similar models not equipped with
    an exhalation valve. True or False?

True
False

Base Camp Personnel Exposure to Particulate Matter during Wildland Fire Suppression Activities
Marcy L. McNamara, Erin O. Semmens, Steven Gaskill, Charles Palmer, Curtis W. Noonan and Tony J. Ward

7. Which of the following are potential sources of PM_2.5 in wildland
fire base camps?

a. Vehicle emissions
b. Road dust
c. Generators
d. Biomass smoke
e. All of the above

8. In three wildland fire base camps, PM_2.5 was higher during
the day than at night. True or False?

True
False

Evaluation of Cut-Off Saw Exposure Control Methods for Respirable Dust and Crystalline Silica in Roadway Construction
Beauregard Middaugh, Bryan Hubbard, Neil Zimmerman and James McGlothlin

9. Which of the following dust control systems was not used
for this study?

a. LEV
b. Local exhaust
c. High volume
d. Wet suppression

10. Given the control efforts employed, workers would still be
expected to exceed the quartz standard in less than _____
using both control methods.

a. one hour
b. one work day
c. about half a work day
d. not estimable from this study

Decontamination of Clothing and Building Materials Associated with the Clandestine Production of Methamphetamine
Kate A. Serrano, John W. Martyny, Shalece Kofford, John R. Contreras and Mike V. Van Dyke

11. This study investigated the efficacy of removing
      methamphetamine contamination from clothing and personal
      protective equipment utilized by fire and police using a
      household washing machine and laundry detergent. The
      researchers found that washing these materials:

a. does little to remove the methamphetamine
          contamination.
b. results in a 90% reduction in the
          methamphetamine levels.
c. at least three times is required in order to
          remove the methamphetamine.
d. in alcohol is the best method.
e. is ineffective in removing methamphetamine
          contamination, and that these materials should
          be discarded.

12. The researchers in this study found that encapsulation
of methamphetamine on painted surfaces can be
accomplished by:

a. spray painting with an oil-based paint.
b. painting the surface with a latex-based paint.
c. painting any surfaces (porous and non-porous).

A Novel Device for Measuring Respirable Dustiness Using Low Mass Powder Samples
Patrick T. O'Shaughnessy, Mitchell Kang and Daniel Ellickson

13. Powders consisting of granular particles are dustier than
powders with fibrous particles. True or False?

True
False

14. The standard method for determining dustiness results in
a value ranging from 1 to 1000 that can be used to rate the
dustiness of the tested powder. True or False?

True
False

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

Deadline for answers has been extended to April 27, 2012.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on April 30, 2012.

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