Testing Status of Agents at NTP
Asphalt Table 4
Table 4. Concentrations of Asphalt Fumes in the Workplace*
| Source of Exposure or Operation | Concentration (mg/m3) | |
|---|---|---|
| BSF† (no. of samples) | Total particulates | |
| Asphalt refining | 0.11 to 13 (48) | 0.02 to 14 (50) |
| Road paving | ND to 0.77 (97) | ND to 15.1 (541) |
| Hot-mix asphalt (HMA) preparation | 0.3 to 1.7 (33) | ND to 7.2 (41) |
| Roofing | ND§ to 6.88 (146) | 0.04 to 12.56 (91) |
| Manufacture of roofing products | 0.01 to 3.7 (34) | 0.07 to 31.9 (84) |
| Flooring and waterproofing | 0.08 to 13.6 (22) | 1.10 to 423 (44) |
* Data summarized from Appendix A.
† Benzene-soluble fraction
§ ND = nondetectable
Web page last updated on August 15, 2005
