Table 1.
Characteristics of air samples taken during demolitions of 25 abandoned residential dwellings without asbestos abatement.
| All samples (n =101) | Transmission Electron Microscopy samples only (n = 46) | |||
|---|---|---|---|---|
| Variable | n (%) | Mean (SD) [range] |
n (%) | Mean (SD) [range] |
| Distance from house | ||||
| < 40 feet | 24 (24%) | 52.4 (16.4) | 16 (35%) | 46.2 (14.2) |
| 40 to 60 feet | 46 (46%) | [18, 90] | 23 (50%) | [25, 75] |
| > 60 feet | 31 (31%) | 7 (15%) | ||
| Down wind | ||||
| Yes | 34 (34%) | -- | 31 (67%) | -- |
| No | 67 (66%) | 15 (33%) | ||
| Total pump run time | ||||
| < 3 hours | 30 (30%) | 3.9 (2.0) | 11 (24%) | 4.2 (1.9) |
| 3 to 5 hours | 34 (34%) | [0.4, 7.1] | 15 (33%) | [0.4, 7.1] |
| > 5 hours | 37 (37%) | 20 (44%) | ||
| Average flow rate | ||||
| < 12 L/min | 13 (13%) | 12.3 (0.3) | 8 (17%) | 12.3 (0.3) |
| 12 to 12.5 L/min | 68 (67%) | [11.6, 13.1] | 29 (63%) | [11.6, 13.0] |
| > 12.5 L/min | 20 (20%) | 9 (20%) | ||
| Total volume | ||||
| <2500 L | 34 (34%) | 2880 (1494) | 13 (28%) | 3122 (1429) |
| 2500 to 3500 L | 25 (25%) | [258, 5279] | 12 (26%) | [258, 5279] |
| >3500L | 42 (42%) | 21 (46%) | ||