Table B-3. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Selected UN Numbers: 2002
Monday, July 2, 2012
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]
| 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.