HAZMAT Table B–9c,,,,,,,,
"Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Rail for Selected UN Numbers: 2002
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"[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,7.7,—,6.6,—,5.8,—,2.6
1010,"Butadienes, stabilized",S,S,S,S,S,S,17.4
1017,Chlorine,11.8,0.2,12.8,0.4,15.7,0.4,14.3
1055,"Isobutylene see also Petroleum gases, liquefied",S,S,S,S,S,S,30.0
1075,Petroleum gases,32.4,3.7,29.3,2.9,28.4,2.3,6.0
1086,"Vinyl chloride, stabilized",17.2,0.3,17.1,0.3,16.0,0.3,12.6
1203,Gasoline,23.9,0.8,34.9,1.9,43.3,1.4,18.3
1230,Methanol,S,S,S,S,S,S,25.0
1268,"Petroleum distillates, n.o.s. ",24.0,0.4,29.0,0.5,28.5,0.5,11.0
1805,"Phosphoric acid, liquid",30.4,0.7,35.3,0.6,41.5,1.1,6.5
1824,Sodium hydroxide solution,24.9,0.5,14.4,0.7,15.9,0.8,5.4
1830,Sulfuric acid,37.9,0.1,S,S,S,S,29.2
1863,"Fuel, aviation, turbine engine",39.4,1.1,39.1,1.6,40.4,1.0,23.5
1910,Calcium oxide,S,S,S,S,S,S,29.8
1964,"Hydrocarbon gas mixture, compressed, n.o.s.",19.4,0.5,31.4,0.7,30.9,1.1,8.6
1987,"Alcohols, n.o.s.",25.3,1.5,26.1,1.1,28.9,1.3,15.5
1993,"Flammable liquids, n.o.s.",21.8,0.8,21.1,1.1,25.8,1.3,10.0
1999,"Tars, liquid",41.6,0.3,41.9,0.7,S,S,23.5
2448,"Sulfur, molten",S,S,30.2,0.8,23.4,0.5,15.9
3082,"Environmentally hazardous substances, liquid, n.o.s.",31.1,1.2,23.7,0.4,22.9,0.5,7.7
3257,"Elevated temperature liquid, n.o.s.",19.9,1.0,25.9,2.0,21.2,2.3,6.3
—,All other,12.5,4.4,10.9,3.4,8.3,2.8,6.1
"
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.",,,,,,,,