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

Table B-9d. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Water 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 12.5 14.3 12.0 S
1010 Butadienes, stabilized S S S S 41.4 0.5 S
1114 Benzene 41.9 2.1 39.8 0.8 36.8 0.5 27.8
1145 Cyclohexane S S S S S S 34.9
1202 Gas oil, diesel fuel, heating oil, light S S S S S S S
1203 Gasoline 24.3 6.1 24.6 5.7 19.0 5.3 S
1223 Kerosene 45.7 0.6 41.1 0.7 40.6 0.5 30.4
1230 Methanol S S S S S S S
1268 Petroleum distillates, n.o.s. 41.5 0.4 45.6 0.5 S S S
1270 Petroleum oil. S S S S S S 31.6
1307 Xylenes 37.2 0.5 38.0 0.4 S S S
1824 Sodium hydroxide solution 24.7 0.2 24.6 0.6 42.0 1.2 32.8
1830 Sulfuric acid S S 38.8 0.4 43.4 0.3 34.9
1863 Fuel, aviation, turbine engine 31.0 1.1 34.0 1.2 34.4 1.6 22.8
1964 Hydrocarbon gas mixture, compressed, n.o.s. S S S S S S 46.7
1993 Flammable liquids, n.o.s. 16.6 4.9 14.3 4.7 16.5 2.2 S
1999 Tars, liquid S S S S S S S
2398 Methyl tert– butyl ether S S S S S S 30.4
2448 Sulfur, molten 44.1 49.9 0.2 S S 30.1
3082 Environmentally hazardous substances, liquid, n.o.s. 48.3 1.8 47.7 1.0 S S 30.0
3257 Elevated temperature liquid, n.o.s. S S 46.7 1.2 S S 28.1
All other 14.2 2.0 12.9 1.4 18.5 2.6 22.7

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.