Table 1 Activity-related weighting scheme to carry out PEA for different safety scenarios
Activity at time steps (periods) modeled | Low safety | High safety | Justifications for weights in different safety scenarios (impact of activity on exposure) |
|---|---|---|---|
At home/nearby (t1–t4) | 0.4 | 0.3 | Frequent contacts with surfaces without protection but outside fields (lower H values). Higher risk "perception" in high-safety scenario. |
Traveling to field (t5–t6) | 0.3 | 0.2 | Uptake at shoes/clothes possible but mostly outside fields. Different clothes/shoes for work and at home in high-safety scenario. |
Working on the field (t7–t23) | 1 | 0.6 | Frequent dermal contacts and inhalation (primary drift) on the field; Low safety scenario: no protection equipment (same clothes at home and for work, no gloves, masks, glasses, or coveralls); High safety scenario: Different clothes for work and at home, and "some" protection equipment |
Traveling back (t24–t25) | 0.3 | 0.2 | See traveling above |
At home/nearby (t26–t32) | 0.4 | 0.3 | See being at home above |