Locomotive Emissions Monitoring Program - Railway Association of ...

Appendix E-2
Locomotive CAC Emissions
U.S. Units x 1,000 tons
1990 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Total – Rail Operations
NOx 123.23 125.20 118.17 120.54 130.87 133.05 123.41 128.91 126.34 123.44 113.49 109.65
CO 23.77 23.91 22.59 23.05 23.36 23.76 24.14 17.93 18.12 17.36 12.94 11.25
HC 5.61 5.62 5.28 5.38 5.47 5.54 5.61 7.26 7.33 4.86 4.27 4.24
PM 2.75 2.76 2.60 2.66 2.69 2.74 2.77 5.29 4.50 3.05 3.89 3.45
SOx 5.41 5.44 5.14 5.24 5.32 5.41 5.48 4.66 5.46 5.28 2.10 0.61
Passenger Operations
NOx 6.20 3.97 3.90 4.10 6.66 6.79 6.65 6.72 7.57 7.29 6.96 6.82
CO 1.20 0.69 0.67 0.71 1.15 1.17 1.15 1.01 1.03 0.57 0.44 0.44
HC 0.31 0.18 0.18 0.19 0.30 0.31 0.30 0.25 0.26 0.22 0.10 0.11
PM 0.15 0.09 0.08 0.09 0.14 0.15 0.14 0.15 0.15 0.14 0.09 0.09
SOx 0.27 0.16 0.15 0.16 0.26 0.27 0.26 0.25 0.25 0.24 0.10 0.03
Freight Train – Line-haul
NOx 109.80 113.30 108.42 110.59 118.23 121.28 112.10 116.27 112.90 110.98 100.67 97.44
CO 21.19 21.86 20.92 21.34 21.19 21.74 22.19 15.86 16.04 16.36 12.16 10.49
HC 4.82 4.97 4.76 4.85 4.82 4.94 5.04 6.66 6.73 4.39 3.83 3.81
PM 2.41 2.48 2.38 2.43 2.41 2.47 2.52 4.99 4.10 2.78 3.63 3.20
SOx** 4.82 4.97 4.76 4.85 4.82 4.94 5.04 4.22 5.02 4.86 1.94 0.55
Yard Switching and Work Train
NOx 7.23 7.93 5.85 5.85 5.98 4.98 4.66 5.93 5.87 5.17 5.86 5.39
CO 1.38 1.36 1.00 1.00 1.02 0.85 0.80 1.06 1.05 0.43 0.34 0.32
HC 0.48 0.47 0.34 0.34 0.35 0.29 0.27 0.34 0.34 0.25 0.34 0.32
PM 0.19 0.19 0.14 0.14 0.14 0.12 0.11 0.14 0.14 0.12 0.18 0.17
SOx 0.32 0.31 0.23 0.23 0.24 0.20 0.18 0.19 0.19 0.18 0.07 0.02
Total Freight Operations
NOx 117.03 121.23 114.27 116.44 124.21 126.26 116.76 122.19 118.77 116.15 106.53 102.83
CO 22.57 23.22 21.92 22.34 22.21 22.59 22.99 16.92 17.09 16.79 12.50 10.81
HC 5.30 5.44 5.10 5.19 5.17 5.23 5.31 7.00 7.07 4.64 4.17 4.13
PM 2.60 2.67 2.52 2.57 2.55 2.59 2.63 5.13 4.24 2.90 3.81 3.37
SOx 5.14 5.28 4.99 5.08 5.06 5.14 5.22 4.41 5.21 5.04 2.00 0.57
Freight Operations Emissions Intensity lb per 1,000 RTM
NOx 1.37 1.19 1.11 1.05 1.13 1.19 1.05 1.03 0.99 0.95 0.86 0.87
CO 0.26 0.23 0.21 0.20 0.20 0.21 0.21 0.14 0.13 0.14 0.10 0.09
HC 0.06 0.05 0.05 0.05 0.05 0.05 0.05 0.06 0.06 0.04 0.03 0.03
PM 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.04 0.03 0.02 0.03 0.03
SOx 0.06 0.05 0.05 0.05 0.05 0.05 0.05 0.04 0.04 0.04 0.02 0.00
Note 1: 2007 CAC masses revised to reflect Audited Tier-level locomotive numbers in fleet
Note 2: For 2008, SOx values calculated for a diesel fuel sulphur content of 147 ppm
56 LEM 2008