Table B-9f. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Pipeline for Selected UN Numbers: 2002

Table B-9f. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Pipeline for Selected UN Numbers: 2002

[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]

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UN number Description Value Tons Ton-miles CV of average miles
per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
  Total 6.6 7.0 14.8 36.7
1005 Ammonia, anhydrous S S S S S S 34.8
1011 Butane 40.6 0.2 45.9 0.2 S S 47.9
1013 Carbon dioxide S S S S S S S
1066 Nitrogen, compressed S S S S S S 29.0
1072 Oxygen, compressed S S S S S S 31.6
1075 Petroleum gases 21.5 0.5 20.7 0.4 35.9 0.8 S
1077 Propylene 45.7 0.4 43.0 0.3 41.0 S
1114 Benzene S S S S S S S
1202 Gas oil, diesel fuel, heating oil, light 22.8 1.3 20.2 1.4 23.8 0.9 27.3
1203 Gasoline 8.1 3.3 8.0 3.4 24.9 7.9 15.4
1223 Kerosene S S S S S S S
1230 Methanol S S S S S S 26.2
1830 Sulfuric acid S S 33.7 0.1 29.1 19.6
1863 Fuel, aviation, turbine engine 17.6 1.5 18.9 1.6 34.1 2.4 S
1962 Ethylene 32.0 1.0 33.7 0.6 45.0 0.5 40.9
1964 Hydrocarbon gas mixture, compressed, n.o.s. 45.7 0.8 44.2 0.5 S S S
1965 Hydrocarbon gas mixture, liquefied, n.o.s. 43.3 0.1 S S S S 23.6
1993 Flammable liquids, n.o.s. 16.1 1.8 17.1 2.2 17.4 3.9 35.8
2398 Methyl tert-butyl ether 41.2 0.2 41.2 0.1 41.2 25.8
3295 Hydrocarbons, liquid, n.o.s. S S S S S S 31.6
All other 19.6 0.4 19.4 0.4 S S 34.0

KEY:
– Represents an estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of highly sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.