Testing Status of Agents at NTP
Asphalt Table 1
Table 1. Concentration Range for Asphalt Hot-Mix Emissions
| Compound | New Jersey Range |
North Carolina Range |
|---|---|---|
| ppm/vol | ||
| Methane | 2 - 3 | 2 - 3 |
| C2-C6 hydrocarbons | <1** | <1** |
| Hydrogen sulfide | <0.2*- 1.5 | <0.2* |
| Carbonyl sulfide | <0.2* | <0.2* |
| Mercaptans | <0.2* | <0.2* |
| Sulfur dioxide | <2* | <0.5* |
| Carbon monoxide | 4 - 6 | 3 |
| Aldehydes | <0.1* | 0.3 - 0.4 |
| Phenols | <1 | <1** |
| Ozone | <0.1 | - |
| Nitrogen dioxide | <0.1 | 0.05-0.08 |
| mg/m3 | ||
| C7-C14 hydrocarbons | 3 - 9 | 3 - 5 |
| High volume sample Total particulates | 2.6 - 6.4 | 0.5 -5.7 |
| Benzene soluble | 0.3 - 0.5 | 0.2 -5.4 |
| mg/1,000 m3 | ||
| Pyrene | 44 - 240, 107 avg | 96 |
| Benz(a)anthracene | 5 - 24, 11 " | 32 - 38 |
| Benzo(a)pyrene | 3 - 20, 11 " | 14 - 22 |
| Benzo(e)pyrene | 14 - 40, 26 " | Not found |
| Perylene | 5 - 16, 12 " | 6, 6 |
| mg/m3 | ||
| Nickel | 0.005 | 0.04 |
| Vanadium | 0.02 - 0.08 | <0.1* |
| Cadmium | -- | <0.05* |
| Lead | -- | <0.05* |
* Not detected. If present at all, the compound was at a concentration below that as shown. The less than (<) value represents the sensitivity of the sampling and analysis procedure.
**Small amount detected; less than
value shown
Adapted from AI [1975].
Web page last updated on August 15, 2005
