Testing Status of Agents at NTP
Asphalt Table A-6
Table A-6. Exposure concentrations measured during flooring and waterproofing operations
|
Exposure concentration (mg/m3)
| |||||||
|---|---|---|---|---|---|---|---|
| Sample |
Mean | ||||||
| Occupation | Source of exposure | Number | Type | Range | Arithmetic | Geometric | Reference |
| Brusher of felt
interply adhesive | Waterproofing of
basements, kitchens, bathrooms, & corridors | 9 | Total particulates
1- to 4-hr TWA | 1.1-32
| 10.4 | --- | Ahonen et al. [1977] |
| 5 | Cyclohexane solubles
1- to 4-hr TWA | 0.8-28 | 7.7 | --- | |||
| Mixing Operator
(other possible exposures) | Manufacturer of vinyl
asbestos and asphalt asbestos floor covering | 6 | Benzene solubles
10-hr TWA | 0.08-0.66 | 0.367 | 0.2995 | Belanger & Elesh [1979] |
| Spreader of hot bitumen and felt seaming | Waterproofing of
kitchens, bathrooms, & underground spaces | 15 | Total particulates | 1.9-42.3 | 17.7 | --- | Priha et al. [1980] |
|
Cyclohexane solubles
1- to 3-hr TWA |
0.3-38.9 | --- | --- | ||||
| Spreader of hot bitumen and felt seaming | Waterproofing of
basements | 6 | Total particulates | 1.6-12.7 | 6.1 | --- | |
|
Cyclohexane solubles
1- to 3-hr TWA | 1.6-10.8 | 5.6 | --- | ||||
| Spreader | Flooring-industrial asphalt mixture of bitumen, lime, sand, gravel, and coloring agent | 10 | Carbon tetrachloride extracts | 8.2-237 | 8.27 | --- | Claydon et al. [1984] |
| Tipper | 10 | Carbon tetrachloride extracts | 3.1-260 | 7.26 | --- | ||
| Float finisher | 8 | Carbon tetrachloride extracts | 1.7-214 | 6.31 | --- | ||
| Bucket carrier | 4 | Carbon tetrachloride extracts | 0.5-5.5 | --- | --- | ||
| Bucket filler | 2 | Carbon tetrachloride extracts | 3.1-4.2 | --- | 3.607 | ||
| Troweler | Bitumen mastic on gymnasium floor | 2 | Total particulates | 5.5-11.8 | 8.65 | 8.056 | Claydon et al. [1984] |
| Troweler | 2† | Total particulates | 1.2-6.3 | 3.75 | 2.749 | ||
| 4† | Total particulates | 1.7-29.5 | --- | --- | |||
| Troweler | Hand laying mastic containing 11% bitumen at 265°-280°C | 1 | Benzene solubles | --- | 10 | 10 | |
| Tipper | 1 | Benzene solubles | --- | 7.1 | 7.1 | ||
| Carrier | 1 | Benzene solubles | --- | 11 | 11 | ||
| Kettleman | 1 | Benzene solubles | --- | 2.9 | 2.9 | ||
|
Bucket carrier, pourer (indoors) |
Mastic
asphalt (265°-2809°C) | 5 | Total particulates 8-hr TWA | 10.5-17.6 | 13.3 | --- | Brandt & Molyneux [1985] |
| 5 | Benzene solubles 8-hr TWA |
6.0-13.6 | 8.8 | --- | |||
| Kettleman (outside) | 4 | Total particulates 8-hr TWA 2.9-7.7 | 4.4 | --- | |||
| 4 | Benzene solubles 8-hr TWA | 2.0-5.0 | --- | --- | |||
| Troweler | 3 | Total particulates 8-hr TWA | 10.7-18.2 | 14.2 | --- | ||
| 3 | Benzene solubles 8-hr TWA | 7.3-13.1 | 10.4 | --- | |||
* Concentrations are reported as milligrams of asphalt fumes per cubic meter of air (mg/m3) in personal samples, except for those figures marked with an (†) which were area samples.
†
Area sample
Web page last updated on August 15, 2005
