S. No. | Concentration in Fuel Lb/MBtu | Concentration in Fuel Kg/GJ | FL | FL Classification |
1 | Less than 0.4 | Less than 0.17 | 1 | No Foul |
2 | Between 0.4 - 0.8 | Between 0.17 - 0.34 | 2 | Probable Foul |
3 | Greater than 0.8 | Greater than 0.34 | 3 | Certain Foul |