Table 3.
Comparison of average emission factors (EFs) from non-biomass fuels (e.g., structures, furnishings, vehicles) at the wildland-urban interface (WUI) and from natural fuels from wildland fires, derived from SERA. EF units are g/kg fuel consumed, unless otherwise noted.
| CO2 | CO | HCN | NOx | HCl | SO2 | PM | C6 H6 | Benzo(a) pyrene | Polychlorinated dibenzo-p-dioxins (μg/kg) | Polychlorinated dibenzofurans (μg/kg) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Average EF for non-biomass WUI fuels | 1514 | 124 | 8.8 | 5.7 | 153 | 62.2 | 66.7 | 31.4 | 0.12 | 0.53 | 14.0 |
| # EFs observed | 143 | 145 | 49 | 21 | 32 | 14 | 97 | 41 | 18 | 4 | 4 |
| Standard deviation | 917 | 130 | 41.6 | 19.4 | 404 | 164 | 84.9 | 67.2 | 0.19 | 1.04 | 28.0 |
| Average EF for wildland fires | 1550 | 104 | 0.5 | 2.2 | 0.3 | 1.1 | 25.1 | 0.4 | 0.0003 | 0.032 | 0.021 |
| # EFs observed | 597 | 640 | 188 | 202 | 37 | 125 | 688 | 84 | 11 | 13 | 13 |
| Standard deviation | 313 | 58 | 0.6 | 2.1 | 0.9 | 0.7 | 34.8 | 0.3 | 0.0002 | 0.020 | 0.017 |
| WUI/wildland fire EF ratio | 0.98 | 1.2 | 19 | 2.6 | 488 | 56 | 2.7 | 85 | 366 | 16 | 667 |