A Quantitative Validation of the Control Banding Nanotool.
David M Zalk1, Samuel Y Paik1, Wesley D Chase1
1Lawrence Livermore National Laboratory, Livermore, CA, USA.
Annals of Work Exposures and Health
|August 22, 2019
Summary
The control banding Nanotool effectively manages worker exposure to engineered nanoparticles (ENP). This study quantitatively validates its qualitative risk assessments, confirming its utility in diverse research settings.
Area of Science:
- Occupational Health
- Nanotechnology Safety
- Risk Assessment
Background:
- Control banding (CB) Nanotool developed for qualitative assessment of engineered nanoparticles (ENP) lacks quantitative validation.
- Numerous CB models exist, but their effectiveness hasn't been verified against quantitative methods.
Purpose of the Study:
- Evaluate the effectiveness of the CB Nanotool in diverse settings.
- Provide quantitative validation for the CB Nanotool's risk assessment outcomes.
Main Methods:
- Reviewed existing literature on the CB Nanotool.
- Assessed 28 ENP handling activities using CB Nanotool (Version 2.0).
- Employed combined real-time monitoring, filter analysis, and microscopic analysis for quantitative metrics (mass, number concentration, speciation).
Main Results:
- Qualitative control outcomes from the CB Nanotool were sufficient.
- Worker exposure to ENP remained below established limits or background levels.
- CB Nanotool risk level outcomes were independently validated quantitatively.
Conclusions:
- The CB Nanotool effectively controls worker exposure to ENP.
- Quantitative validation supports the use of the CB Nanotool in the absence of air monitoring.
- Findings lend further credence to the CB Nanotool's reliability in occupational settings.
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