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