Diesel Internal Combustion Engine (DICE) Engine
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| Pollutant | Emission Factor | Units | Ref |
| PM | 1.0 | g/bhp-hr | 1 |
| NOx (as NO2) | 14.1 | g/bhp-hr | 1 |
| NMHC | 1.12 | g/bhp-hr | 1 |
| NMHC+NOx | 15.22 | g/bhp-hr | 1 |
| CO | 3.0 | g/bhp-hr | 1 |
| SOx (as SO2) | 3.67 * wt %S | g/bhp-hr | 2 |
basis: (1) USEPA AP-42, Table 3.3-1, (2) USEPA AP-42, Table 3.3-2, where S = wt % of sulfur (eg, for S = 0.05 wt %: SOx = (3.67)*(0.05) = 0.183 g/bhp-hr. Assume NMHC = ROC
USEPA Emission Standards for Tier 1 - 3 engines
| Engine Power (hp) | Model Years | Regulation | Emission Standards (g/hp-hr) | Year the Std Takes Effect | |||||
| HC a, d | VHC b | NOx a, d | NMHC+NOx a | CO a | PM a | ||||
| 50 to <75 | 1998-2003 | Tier 1 | 6.90 | 1998 | |||||
| 2004-2007 | Tier 2 | 0.40 | 0.3996 | 5.20 | 5.60 | 3.70 | 0.30 | 2004 | |
| 2008-2012 | Tier 3 | 0.20 | 0.1998 | 3.3 | 3.50 | 3.70 | c | 2008 | |
| >75 to <100 | 1998-2003 | Tier 1 | 6.90 | 1997 | |||||
| 2004-2007 | Tier 2 | 0.40 | 0.3996 | 5.20 | 5.60 | 3.70 | 0.30 | 2004 | |
| 2008-2011 | Tier 3 | 0.20 | 0.1998 | 3.3 | 3.50 | 3.70 | c | 2007 | |
| >100 to <175 | 1997-2002 | Tier 1 | 6.90 | 1997 | |||||
| 2003-2006 | Tier 2 | 0.40 | 0.3996 | 4.5 | 4.90 | 3.70 | 0.22 | 2003 | |
| 2007-2011 | Tier 3 | 0.20 | 0.1998 | 2.8 | 3.00 | 3.70 | c | 2007 | |
| >175 to <300 | 1996-2002 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 1996 | |
| 2003-2005 | Tier 2 | 0.40 | 0.3996 | 4.5 | 4.90 | 2.60 | 0.15 | 2003 | |
| 2006-2010 | Tier 3 | 0.20 | 0.1998 | 2.8 | 3.00 | 2.60 | c | 2006 | |
| >300 to <600 | 1996-2000 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 1996 | |
| 2001-2005 | Tier 2 | 0.30 | 0.2997 | 4.5 | 4.80 | 2.60 | 0.15 | 2001 | |
| 2006-2010 | Tier 3 | 0.20 | 0.1998 | 2.8 | 3.00 | 2.60 | c | 2006 | |
| >600 to <750 | 1996-2001 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 1996 | |
| 2002-2005 | Tier 2 | 0.30 | 0.2997 | 4.5 | 4.80 | 2.60 | 0.15 | 2002 | |
| 2006-2010 | Tier 3 | 0.20 | 0.1998 | 2.8 | 3.00 | 2.60 | c | 2006 | |
| >750 except generator sets | 2000-2005 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 2000 | |
| 2006-2010 | Tier 2 | 0.30 | 0.2997 | 4.5 | 4.80 | 2.60 | 0.15 | 2006 | |
| Generator sets >750 to <1200 | 2000-2005 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 2000 | |
| 2006-2010 | Tier 2 | 0.30 | 0.2997 | 4.5 | 4.80 | 2.60 | 0.15 | 2006 | |
| Generator sets >1200 | 2000-2005 | Tier 1 | 1.00 | 0.9990 | 6.90 | 8.50 | 0.40 | 2000 | |
| 2006-2010 | Tier 2 | 0.30 | 0.2997 | 4.5 | 4.80 | 2.60 | 0.15 | 2006 | |
Notes:
a Nonroad CI Engine Emission Standards from Title 13, California Code of Regulations, Section 2423 (ARB Executive Order "Std").
b VHC = Total Hydrocarbons (THC) minus methane and ethane fractions. Equivalent APCD standard. (Highlighted in Orange) See Conversion Factors to Hydrocarbon Emission Components, Report No. NR-002a, US EPA, 5/2003. {VHC = ROC}
c Tier 3 PM standards have not yet been adopted. Tier 3 engines must meet the Tier 2 PM standard until the Tier 3 PM standard has been adopted.
d Tier 2 and Tier 3 HC and NOx equivalent standards used to determine the NMHC + NOx standard. (Highlighted in blue)
For more information or assistance, call or email Mike Goldman at (805) 961-8821 or Kaitlin Ergun at (805) 961-8855 (Engineering and Compliance Division).
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