"The Action Level!®"
— Current Quiz


Edited by J. Thomas Pierce, PhD, CIH (1980-2012), DABT (Retired)

“The Action Level!®, a self-study, continuing education program, provides a convenient and interesting opportunity for individuals to expand their knowledge in relevant areas of industrial hygiene, as well as occupational and environmental safety and health. The program is approved by both the Global EHS Credentialing®, and the Board of Certified Safety Professionals, which award Certification Maintenance (CM) points and recertification points, respectively, for successful participation.

Participants must read each issue of the Journal, answer “The Action Level!® questions, and return the completed answer sheet at the end of that issue’s “The Action Level!® column. To earn the designated credit, an average score of 70 percent or better is required within a 12-month period. Certified Industrial Hygienists and Certified Associate Industrial Hygienists may earn up to 12 contact hours per year. Certified Safety Professionals may earn up to 1.2 recertification points per year.

Credit is awarded only four times each year—in March, June, September, and December—to participants who score an average of 70 percent or better within each three-month quarter. To earn credit in any quarter, participants must satisfactorily complete answer sheets for all three months of that quarter.

The program is based on a calendar year and subscriptions running from January 1 to December 31 are available to participate in
 “The Action Level!® program. New participants in the program can enroll at any time, but their enrollment fees will be prorated by the number of quarters they are eligible to participate. 

To enroll, click here,  read about the program and click on “register” to complete your registration.  The cost is $219 (ACGIH®/AIHA members)/$249 (nonmembers) for one calendar year running January 1 to December 31. Prorations are available for new participants who purchase after January 31.  Nonmembers are encouraged to become members to take advantage of the member discount. For more information regarding ACGIH® membership, call 513-742-2020, or apply online.  

This continuing education program fee is separate from the Journal subscription cost. The fee covers administration costs, and is nonrefundable. 

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January 2020 — Volume 17 No 1


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

Variability of Aerosol Mass and Number Concentrations during Taconite Mining Operations

Nima Afshar-Mohajer, Rebecca Foos, John Volckens and Gurumurthy Ramachandran

1. Which of these operations within a taconite mining facility generates the steadiest concentration of nano-sized particles?



2. Which of the following operations within a taconite mining facility exhibited the greatest comparability between lung deposited surface area concentrations (as measured by Partector and DiSCmini nano aerosol techniques)?



Biocidal Spray Product Exposure: Measured Gas, Particle and Surface Concentrations Compared with Spray Model Simulations

Per Axel Clausen, Thit Aarøe Mørck, Alexander Christian Østerskov Jensen, Torben Wilde Schou, Vivi Kofoed-Sørensen, Ismo K. Koponen, Marie Frederiksen, Ann Detmer, Michael Fink, Asger W. Nørgaard and Peder Wolkoff

3. Which of the following choices best describes the ConsExpo simulation of measured concentrations of active substances among three biocides.


4. All active substances in the three biocides were measured. True or False?

Assessing Virus Infection Probability in an Office Setting Using Stochastic Simulation

R. David Contreras, Amanda Wilson, Fernanda Garavito, Jonathan D. Sexton, Kelly A. Reynolds and Robert A. Canales

5. According to the results of a sensitivity analysis of a stochastic model for viral infections, the model input with the greatest influence on the risk outcome is:



6. Results of stochastic models show that disinfection of common surfaces in office settings can significantly reduce the risk of viral infection of office employees. True or False?

Career Fire Hall Exposures to Diesel Engine Exhaust in Ontario, Canada

JuWon Chung, Paul A. Demers, Sheila Kalenge and Tracy L. Kirkham

7. The proposed Dutch occupational exposure limit (aka., target value) used in this study was:



Answer Key:
17(1)_7
8. In this study non-detects (i.e., samples < LOD) were handled by replacing the LOD with LOD/sqrt. True or False?



Deadline for answers is January 31, 2020.

Answers will be available online on February 7, 2020.