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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Table B-9d. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Water for Selected UN Number (1) for the United States: 2012

Monday, July 13, 2015

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(Estimates are based on data from the 2012 Commodity Flow Survey)

UN number UN description Value Tons Ton-miles (2) Average miles per shipment—
coefficient of variation of number
Coefficient of variation of number Standard error of percent of total Coefficient of variation of number Standard error of percent of total Coefficient of variation of number Standard error of percent of total
  Total 24.3 2.0 28.2 2.6 17.4 2.6 15.6
1005 Ammonia, anhydrous 36.6 9.6 44.4 10.5 S S S
1011 Butane, see also petroleum gases, liquefied 46.4 35.8 46.4 38.1 46.4 5.1 0.0
1114 Benzene, or benzol S S S S S S 36.5
1202 Diesel fuel, including gas oil or heating oil, light S S S S 32.4 6.0 S
1203 Gasoline, includes gasoline mixed with ethyl alcohol 28.3 1.2 26.9 1.1 44.6 7.4 30.0
1267 Petroleum crude oil 19.7 9.1 19.8 9.3 19.8 25.9 Z
1268 Petroleum distillates, n.o.s. or petroleum products, n.o.s. 31.3 8.4 26.6 8.6 S S 26.8
1270 Petroleum oil S S 48.6 14.2 48.6 25.6 0.0
1307 Xylenes S S S S S S 37.7
1824 Sodium hydroxide solution 21.4 1.8 22.5 2.8 31.2 5.3 23.7
1830 Sulfuric acid with more than 51 percent acid S S S S 38.3 7.8 S
1831 Sulfuric acid, fuming with 30 percent or more free sulfur trioxide S S S S S S S
1863 Fuel, aviation, turbine engine 46.6 11.3 47.1 10.8 47.6 19.8 S
1918 Isopropylbenzene 35.6 0.3 33.7 0.2 43.8 Z 20.7
1964 Hydrocarbon gas mixture, compressed, n.o.s. 29.6 10.0 26.6 7.7 23.3 10.2 27.8
1972 Methane, refrigerated liquid (cryogenic liquid) or natural gas 5.1 62.7 8.2 18.8 8.2 31.0 0.0
1993 Flammable liquids, n.o.s 45.5 3.9 49.2 4.8 43.0 6.1 S
1999 Tars, liquid including road oils and cutback bitumens, including road asphalt S S S S S S 34.6
2055 Styrene monomer, stabilized 15.5 17.1 17.2 18.2 15.6 4.3 9.9
2398 Methyl tert-butyl ether 26.1 1.0 32.2 0.4 32.2 2.0 0.0

KEY: S = Withheld because estimate did not meet publication standards.

Z = Rounds to zero.

(1) UN numbers shown had the highest estimated weight without considering sampling variability. Since an “All other UN numbers” line is not shown, estimates do not add to total.

(2) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.

NOTES: 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/econ/cfs>.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.