Modelling Exposure by Spraying Activities-Status and Future Needs.

Area of Science:

• Occupational Health and Safety
• Environmental Science
• Risk Assessment

Background:

• Spray applications are common in both occupational and consumer settings for uniform substance distribution.
• Accurate exposure modeling for spraying activities is crucial for risk assessment.
• Current models often lack comprehensive evaluation and standardization.

Purpose of the Study:

• To systematically review existing models for exposure assessment in spray applications.
• To identify limitations in current model accuracy and conservatism.
• To recommend improvements for future exposure modeling of spraying activities.

Main Methods:

• Conducted a systematic literature review on exposure modeling for spraying.
• Discussed findings and future needs with experts at a symposium.
• Analyzed model performance, conservatism, and accuracy from published studies.

Main Results:

• Information extraction on model performance from studies was challenging due to limited scope.
• Existing studies often covered only a fraction of potential spray applications.
• Model accuracy was difficult to interpret without systematic evaluation across diverse scenarios.

Conclusions:

• More systematic evaluation of spray exposure models is needed, considering varied equipment and application patterns.
• Improving model predictions requires better consideration of spray equipment variations.
• Inter-model harmonization and standardized parameters for specific scenarios are recommended for user utility.