Computation of cumulative weighted pounds per acre treated exposure estimate for a hypothetical worker
| Pounds of active ingredient/acre treated* (county) | Crop (year) | Jobs | Original average job weighting | Conservative job weighting | Maximum job weighting | Original weighted estimate† | Conservative weighted estimate‡ | Maximum weighted estimate§ |
|---|---|---|---|---|---|---|---|---|
| *Taken from California DPR pesticide usage data. | ||||||||
| †Calculated as pounds of active ingredient/acre treated × original average job weighting (example: 3.5×6.0). | ||||||||
| ‡Calculated as pounds of active ingredient/acre treated × conservative job weighting (example: 3.5×0.475). | ||||||||
| §Calculated as pounds of active ingredient/acre treated × maximum job weighting (example: 3.5×0.90). | ||||||||
| 3.5 (Mariposa) | Grapes (1980) | Harvesting, sprayer | (0.3+0.9)/2 = 0.60 | (0.05+0.9)/2 = 0.475 | 0.90 | 2.1 | 1.66 | 3.15 |
| 5.0 (Solano) | Grapes (1982) | Sprayer | 0.90 | 0.90 | 0.90 | 4.5 | 4.5 | 4.5 |
| 10.0 (Solano) | Grapes (1983) | Mixed pesticides | 1.0 | 1.0 | 1.0 | 10.0 | 10.0 | 10.0 |
| 2.0 (Kern) | Almonds (1984) | Packing, harvesting, sprayer | (0.05+0.30+0.9)/3 = 0.42 | (0.005+0.05+0.9)/3 = 0.32 | 0.90 | 0.84 | 0.64 | 1.8 |
| 8.0 (Kern) | Almonds (1985) | Packing, harvesting, sprayer | (0.05+0.30+0.9)/3 = 0.42 | (0.005+0.05+0.9)/3 = 0.32 | 0.90 | 3.36 | 2.56 | 7.2 |
| 7.6 (Kern) | Almonds (1986) | Fencing, management, tying vines | (0.05+0.01+0.30)/3 = 0.12 | (0.005+0.001+0.05)/3 = 0.019 | 0.90 | 0.912 | 0.014 | 6.84 |
| Cumulative exposure estimate | 21.712 | 19.374 | 33.49 | |||||