(Final Ruling)
Basic Catalyst & Housing
| Engine Type | Source | Standard Per Final Ruling |
|---|---|---|
| Spark Ignited (SI) 2 Stroke Lean Burn | Area Source Major Source (100‐500 HP) | Management Practices 225 ppmv CO |
| Spark Ignited (SI) 4 Stroke Lean Burn | Area / Major Sources (>500 HP) Major Source (100‐500 HP) | 47 ppmv CO or 93% Reduction 47 ppmv CO |
| Spark Ignited (SI) 4 Stroke Rich Burn | Area Source (>500 HP) Major Source (100‐500 HP) | 2.7 % ppmv CH2O or 76% CH2O Red. 10.3 ppmv CH2O |
| Compression Ignited (CI) Non‐Emergency 100‐300 HP | Area and Major Sources | 230 ppmv CO |
| Compression Ignited (CI) Non‐Emergency 301‐500 HP | Area and Major Sources | 49 ppmv CO or 70% CO Reduction |
| Compression Ignited (CI) Non‐Emergency >501 HP | Area and Major Sources | 23 ppmv CO or 70% CO Reduction |
| Compression Ignited (CI) Emergency | Area and Major Sources | Management Practice |
