Table 4.
The seasonal and the day of week variations of the source contributions (μg/m3) by site
| Site | Source Types | Average Source Contribution (SE)
|
|||
|---|---|---|---|---|---|
| Warm Season | Cold Season | Weekdays | Weekends | ||
| Bridgeport | Regional Sulfur | 6.9 (0.5) | 3.6 (0.2) | 5.4 (0.4) | 5.6 (0.5) |
| Motor Vehicle | 3.1 (0.2) | 5.5 (0.4) | 4.5 (0.2) | 3.2 (0.3) | |
| Road Dust | 1.4 (0.1) | 0.8 (0.1) | 1.3 (0.1) | 0.9 (0.1) | |
| Oil Combustion | 1.4 (0.1) | 2.3 (0.2) | 1.8 (0.1) | 1.7 (0.2) | |
| Sea Salt | 0.1 (0.0) | 0.2 (0.1) | 0.2 (0.0) | 0.1 (0.0) | |
|
| |||||
| Danbury | Regional Sulfur | 7.4 (0.5) | 4.3 (0.2) | 6.0 (0.4) | 6.3 (0.6) |
| Motor Vehicle | 2.1 (0.2) | 4.9 (0.4) | 3.6 (0.3) | 2.5 (0.3) | |
| Road Dust | 2.1 (0.2) | 1.8 (0.2) | 2.1 (0.1) | 1.6 (0.2) | |
| Oil Combustion | 0.5 (0.0) | 0.9 (0.1) | 0.7 (0.1) | 0.5 (0.1) | |
| Sea Salt | 0.2 (0.0) | 0.5 (0.1) | 0.3 (0.1) | 0.3 (0.0) | |
|
| |||||
| Hartford | Regional Sulfur | 6.3 (0.3) | 3.4 (0.1) | 5.0 (0.2) | 5.0 (0.3) |
| Motor Vehicle | 2.1 (0.1) | 4.3 (0.2) | 3.4 (0.1) | 2.3 (0.1) | |
| Road Dust | 0.9 (0.1) | 0.6 (0.0) | 0.8 (0.0) | 0.7 (0.1) | |
| Oil Combustion | 1.4 (0.1) | 3.2 (0.2) | 2.3 (0.1) | 1.9 (0.1) | |
| Sea Salt | 0.1 (0.0) | 0.3 (0.0) | 0.2 (0.0) | 0.2 (0.0) | |
|
| |||||
| New Haven | Regional Sulfur | 8.9 (0.3) | 4.7 (0.2) | 7.0 (0.3) | 7.3 (0.4) |
| Motor Vehicle | 3.1 (0.1) | 7.6 (0.3) | 5.6 (0.2) | 3.5 (0.2) | |
| Road Dust | 3.0 (0.1) | 2.8 (0.1) | 3.4 (0.1) | 1.6 (0.1) | |
| Oil Combustion | 0.8 (0.0) | 2.2 (0.1) | 1.5 (0.1) | 1.2 (0.1) | |
| Sea Salt | 0.1 (0.0) | 0.7 (0.1) | 0.4 (0.1) | 0.4 (0.1) | |
|
| |||||
| Springfield | Regional Sulfur | 6.1 (0.4) | 3.0 (0.2) | 4.7 (0.3) | 4.7 (0.4) |
| Motor Vehicle | 2.2 (0.1) | 5.4 (0.3) | 4.0 (0.2) | 2.7 (0.2) | |
| Road Dust | 1.6 (0.1) | 1.1 (0.1) | 1.5 (0.1) | 1.0 (0.1) | |
| Oil Combustion | 1.1 (0.1) | 3.5 (0.2) | 2.4 (0.1) | 1.7 (0.2) | |
| Sea Salt | 0.0 (0.0) | 0.3 (0.0) | 0.1 (0.0) | 0.1 (0.0) | |