Table 2.
Personal and outdoor school-site pollutant levels†
| Pollutant (μg/m3) | Personal | School-site† | PS154 Rooftop (NY DEC) | |||
|---|---|---|---|---|---|---|
| 24-hr Mean ± SD | 24-hr Median | 24-hr Mean ± SD | 24-hr Median | 24-hr Mean ± SD | 24-hr Median | |
|
PS154 (173 ft.)
††
| ||||||
| April 29th – May 19th, 2002 | N = 135 | N = 15 | N = 15 | |||
|
| ||||||
| PM2.5 | 30.7 ± 6.8 | 30.6 | 14.1 ± 4.3 | 12.6 | 13.0 ± 5.0 | 11.5 |
| EC | 1.7 ± .6 | 1.5 | 2.1 ± .8 | 2.2 | ||
| EC/PM2.5 | 0.07 ± 0.02 | 0.06 | 0.15 ± 0.03 | 0.15 | ||
| S | 0.9 ± 0.4 | 0.9 | ||||
|
| ||||||
|
MS302 (1216
ft.)††
| ||||||
| May 4th – May 28th, 2004 | N = 160 | N = 25 | N = 25 | |||
|
| ||||||
| PM2.5 | 32.7 ± 9.3 | 29.6 | 21.0 ± 10.8 | 17.3 | 22.6 ± 11.2 | 18.3 |
| EC | 2.4 ± 1.0 | 2.1 | 2.3 ± 1.6 | 1.6 | ||
| EC/PM2.5 | 0.08 ± 0.02 | 0.08 | 0.10 ± 0.02 | 0.10 | ||
| S | 1.9 ± 1.0 | 1.8 | ||||
|
| ||||||
|
CS152 (128 ft.)
††
| ||||||
| Oct 12th – Nov 4th, 2004 | N = 139 | N = 18 | N = 18 | |||
|
| ||||||
| PM2.5 | 25.8 ± 5.4 | 25.4 | 11.4 ± 3.2 | 11.0 | 10.2 ± 2.8 | 10.0 |
| EC | 1.7 ± .7 | 1.4 | 1.9 ± 1.0 | 1.3 | ||
| EC/PM2.5 | 0.08 ± 0.04 | 0.07 | 0.16 ± 0.06 | 0.14 | ||
| 0.6 ± 0.2 | 0.6 | |||||
|
| ||||||
|
MS201 (2419
ft.)††
| ||||||
| May 3rd – May 31st, 2005 | N = 172 | N = 19 | N = 19 | |||
|
| ||||||
| PM2.5 | 32.2 ± 7.5 | 33.3 | 10.8 ± 2.9 | 10.7 | 10.9 ± 4.1 | 9.5 |
| EC | 1.5 ± .5 | 1.5 | 1.4 ± 0.5 | 1.3 | ||
| EC/PM2.5 | 0.06 ± 0.02 | 0.06 | 0.13 ± 0.03 | 0.12 | ||
| S | 0.7 ± 0.4 | 0.7 | ||||
School-site EC = BC measurements from Aethelometer calibrated to estimated EC from co-located filters
*
Schools adjacent to highways
**
Excluding the two highest pollution days at MS302, means dropped to: Personal PM2.5 = 29±8; Personal EC = 2.0±.4; School-site PM2.5 = 18±7; School-site EC = 1.7±.6; PS154 Rooftop PM2.5 = 20±8
†
Limited to weekdays only 9am-9am average
††
Distance from nearest S. Bronx highway