TABLE 69
1998
Grams per Brake Horsepower-Hour
EMISSION |
STANDARD |
| POLLUTANTS |
|
| Hydrocarbons |
1.30 |
| Carbon Monoxide |
15.50 |
| Nitrogen Oxides |
4.00 |
| Particulate Matter |
0.05 |
| SMOKE (a) |
|
| Acceleration Mode |
20% |
| Lug Mode |
15% |
| Peak during either mode |
50% |
(a) Emissions measured in percent opacity during different operating
modes.
Source: Federal Transit Administration, Sourcebook on
Transit-Related Environmental Regulations, 1994.
2004 Model Year Diesel Engine Emission Standards
At the manufacturer’s option:
2.4 grams emitted per brake horsepower-hour for all non- methane
hydrocarbons plus Nitrogen Oxide,
with no limit on non-methane hydrocarbons, OR
2.5 grams if non-methane hydrocarbons are limited to 0.5 grams.
Source: Environmental Protection Agency
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