Pierre River Mine Project

AIR AENV SIRS 6 – 14
Section 11.1
Table AENV 9-2: Transient Adjustment and Deterioration Factors for Nonroad Diesel
Engines
Category of Vehicle
Transient adjustment factors
NOx CO PM HC
tier 1 0.95 1.53 1.23 1.05
tier 2 0.95 1.53 1.23 1.05
tier 3 1.04 1.53 1.47 1.05
tier 4(a) – – – –
Deterioration factors(b)
tier 1 1.024 1.101 1.473 1.036
tier 2 1.009 1.101 1.473 1.034
tier 3 1.008 1.151 1.473 1.027
tier 4 1.008 1.151 1.473 1.027
Note:
(a) There is no transient adjustment factor for tier 4 engines since transient emission control is expected to be an integral part
of all tier 4 engines.
(b) Engines are assumed to be at the end of their median life to have conservative deterioration factors in calculations.
- = No criteria available.
Source: US EPA NONROAD Methodology (US EPA 2004).
References
Table AENV 9-3: Load Factors for Nonroad Diesel Engines
Category of Vehicle Load Factor
truck 0.58
shovel 0.58
dozer 0.58
grader 0.58
pipe layer 0.58
cable reeler 0.58
excavator 0.53
Source: US EPA NONROAD Methodology (US EPA 2004).
US EPA. 2004. Exhaust and Crankcase Emission Factors for Nonroad Engine
Modelling – Compression Ignition. Prepared by the Office of
Transportation and Air Quality, Research Triangle Park, NC. Report No.
NR-009c.
US EPA. 2005. Technical Highlights – Frequently Asked Questions About
NONROAD 2005. Prepared by the Office of Transportation and Air
Quality, Research Triangle Park, NC. Report No. EPA420-F-05-058.
US EPA. 2009. NONROAD Model (nonroad engines, equipment, and vehicles).
http://www.epa.gov/oms/nonrdmdl.htm#model. Accessed October 2009.
11-8 Shell Canada Limited April 2010
CR029