(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 |
