Table B-3. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Selected UN Numbers: 2002

Table B-3. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics 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 1 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 3.0 4.2 4.4 7.1
1005 Ammonia, anhydrous 27.2 27.1 0.1 27.8 0.2 S
1013 Carbon dioxide 33.9 S S S S 33.1
1017 Chlorine 35.2 0.1 27.4 0.1 18.2 0.1 13.9
1066 Nitrogen, compressed 33.9 0.1 42.1 0.3 S S 20.8
1072 Oxygen, compressed 38.2 0.2 S S S S S
1075 Petroleum gases 12.9 0.4 14.0 0.4 26.0 0.8 43.5
1114 Benzene 40.2 0.2 39.6 0.2 29.0 0.1 30.4
1202 Gas oil, diesel fuel, heating oil, light 11.3 0.4 11.1 0.5 21.5 0.8 16.0
1203 Gasoline 3.6 1.5 3.8 1.7 11.1 2.6 10.7
1223 Kerosene 19.9 21.6 0.1 18.5 28.0
1230 Methanol S S S S S S 27.6
1268 Petroleum distillates, n.o.s. 7.7 16.1 18.7 0.1 34.5
1824 Sodium hydroxide solution 20.2 0.1 15.3 0.2 15.9 0.4 19.7
1830 Sulfuric acid 24.4 15.8 0.1 37.2 0.3 33.6
1863 Fuel, aviation, turbine engine 11.7 0.3 12.3 0.4 19.3 0.6 14.6
1962 Ethylene 32.8 0.2 34.9 0.2 45.7 S
1964 Hydrocarbon gas mixture, compressed, n.o.s. 33.9 0.2 36.3 0.3 32.1 0.4 15.1
1993 Flammable liquids, n.o.s. 8.7 1.0 8.4 1.1 9.6 1.4 19.2
1999 Tars, liquid 35.8 0.1 41.3 0.3 27.7 0.4 15.9
3257 Elevated temperature liquid, n.o.s 25.4 0.3 25.6 0.5 17.8 0.7 22.9
All other 6.5 1.4 9.8 1.0 7.2 2.1 11.4

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.