To determine an engine’s emissions, an owner/operator may use:

Spark Ignited Internal Combustion Engine Emission Factor Calculation Spreadsheet – For all SPICE engines (download excel spreadsheet).

Rule 333 Emission Factors for PUC Gas-Fired Engines
Type[email protected] 15% O2lb/MMBtu
NOxROCCONOxROCCOSOxPMPM10
Rich Burn, Non-Cyclically Loaded, 4 Stroke5025045000.1850.32110.1180.01360.01940.0194
Rich Burn, Cyclically Loaded, 4 Stroke30025045001.1080.32110.1180.01360.01940.0194
Lean Burn, 4 Stroke, 50?bhp<10020075045000.7390.96410.1180.01360.01000.0100
Lean Burn, 4 Stroke, 100+ bhp12575045000.4620.96410.1180.01360.01000.0100
Lean Burn, 2 Stroke, 50?bhp<10020075045000.7390.96410.1180.01360.04830.0483
Lean Burn, 2 Stroke, 100+ bhp12575045000.4620.96410.1180.01360.04830.0483

For more information or assistance, call or email [email protected] at (805) 961-8800 (Engineering Division).