Fossil fuel | Span values for NOX (ppm) |
Gas | 500. |
Liquid | 500. |
Solid | 1,000. |
Combination | 500 (x + y) + 1,000z. |
Where:
x = Fraction of total heat input derived from gaseous fossil fuel,
y = Fraction of total heat input derived from liquid fossil fuel, and
z = Fraction of total heat input derived from solid fossil fuel.
40 C.F.R. §60.49Da