Table B-9c. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Rail for Selected UN Numbers: 2002
Monday, July 2, 2012
Table B-9c. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Rail for Selected UN Numbers: 2002
[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]
| 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.