Table 2. Distribution of Daily PM2.5 Source Concentrations (μg/m3) for Control Periods (lag day 0).
| PM2.5 Source | Mean | Standard Deviation | Minimum | 5th Percentile | 25th Percentile | 50th Percentile | 75th Percentile | 95th Percentile | Maximum |
|---|---|---|---|---|---|---|---|---|---|
| Total PM2.5 | 10.98 | 6.87 | 1.00 | 3.60 | 6.10 | 9.10 | 13.90 | 25.50 | 47.00 |
| All Sites | |||||||||
| road dust (RD) | 0.45 | 0.52 | –0.20 | 0.00 | 0.14 | 0.30 | 0.58 | 1.39 | 6.39 |
| secondary sulfate (SS) | 3.12 | 3.93 | –0.94 | –0.38 | 0.76 | 2.04 | 4.09 | 10.50 | 42.47 |
| secondary nitrate (SN) | 1.81 | 2.80 | –0.78 | –0.16 | 0.13 | 0.75 | 2.37 | 7.65 | 24.12 |
| diesel (DIE) | 1.09 | 0.89 | –0.38 | 0.09 | 0.53 | 0.92 | 1.44 | 2.67 | 10.26 |
| spark ignition emissions (GAS) | 1.60 | 1.67 | –0.44 | –0.17 | 0.41 | 1.13 | 2.32 | 4.92 | 14.60 |
| biomass burning (BB) | 0.37 | 0.53 | –0.22 | –0.05 | 0.04 | 0.18 | 0.53 | 1.38 | 9.92 |
| pyrolyzed organic rich (OP) | 1.31 | 1.81 | –0.34 | –0.18 | 0.11 | 0.83 | 1.83 | 4.35 | 20.24 |
| New York City Sites Only | |||||||||
| fresh sea salt (FSS) | 0.20 | 0.66 | –0.08 | –0.01 | 0.00 | 0.02 | 0.10 | 0.98 | 10.64 |
| aged sea salt (AGS) | 0.60 | 0.74 | –0.15 | –0.03 | 0.10 | 0.37 | 0.80 | 2.08 | 7.93 |
| residual oil (RO) | 0.63 | 0.80 | –0.20 | –0.07 | 0.11 | 0.38 | 0.85 | 2.20 | 7.17 |