Table A presents the assumptions used for the calculations in the wind distribution model (see Figure, p.13).
TABLE A
| Parameter | Assumptions |
| Emissions from the store | Diffuse, through natural ventilation only |
| Average wind velocity | 4 m/year |
| Concentration of pesticides in store | 1 000 mg/m3 |
| Emission rates | 25; 12.5; 2.5 kg/h for open, moderately open and closed stores, respectively |
| Distribution model | Gaussic plume model (short term deposition) |
| Atmosphere stability | Neutral |
| Diameter pesticides particles | Moderately fine (80%d<4um; 17%4<d<10 um; 3% d>10 um) |
| Emission frequency | Every day throughout the year |
The model does have its limitations. The fact that the calculations are carried out for the worst-case parameters means that the maximum emission and maximum distance are calculated to the effect that the long-distance calculations will be overestimates, and the short-distance calculations will be underestimates.
