2012 Economic Census: Transportation: 2012 Commodity Flow Survey: United States: 2012: Hazardous Materials

2012 Economic Census: Transportation: 2012 Commodity Flow Survey: United States: 2012: Hazardous Materials

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  • Alternative Title:
    2012 Economic Census. Transportation. 2012 Commodity Flow Survey. Hazardous Materials
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  • Abstract:
    The Commodity Flow Survey (CFS) is a joint effort by the Bureau of Transportation Statistics (BTS) and the U.S. Census Bureau, U.S. Department of Commerce. The survey is the primary source of national and state-level data on domestic freight shipments by establishments in mining, manufacturing, wholesale, auxiliaries, and selected retail and services trade industries located in the 50 states and the District of Columbia. Data are provided on the type, origin and destination, value, weight, modes of transportation, distance shipped, and ton-miles of commodities shipped. The U.S. Department of Transportation defines hazardous materials as belonging to one of nine hazard classes: Class 1—Explosives, Class 2—Gases, Class 3—Flammable Liquids, Class 4—Flammable Solids, Class 5—Oxidizing Substances and Organic Peroxides, Class 6—Toxic Substances and Infectious Substances, Class 7—Radioactive Materials, Class 8—Corrosive Substances, Class 9—Miscellaneous Hazardous Materials. As part of the shipment characteristics collected in the 2012 CFS, respondents were asked to provide the four-digit United Nations (UN) or North American (NA) identification number. For the 2012 CFS data, the UN/NA codes were used to: (1) identify the shipment as hazardous material, and (2) assign the shipment to one of the nine hazardous material classes for purposes of producing summary tabulations. The data from the 2012 CFS for hazardous material shipments are aggregated to these nine classes, as well as their subcategories known as divisions. Data are also shown for selected UN/NA codes. For the 2012 CFS, 26 Standard Classification of Transported Goods (SCTG) codes were identified as always being hazardous materials. Even if the respondent left the UN/ NA code blank, we assigned the shipment to the appropriate UN/NA code. For example, every shipment of gasoline (SCTG 17110) was assigned a UN/NA code of 1203 either by the respondent or during our tabulation process. When an SCTG could have translated to more than one UN/NA code, the shipment was reviewed and the appropriate UN/ NA code was chosen. Please note that because of the industry coverage and shipment definitions of the CFS, certain hazardous materials such as infectious substances or radioactive wastes were not well represented in the CFS data. The UN classification system has been adopted for worldwide use by the United Nations Committee of Experts on the Transport of Dangerous Goods. The UN system was incorporated into the Federal Code of Regulations by the U.S. Department of Transportation for domestic transportation in 1980. The NA system is a parallel hazard identification system used in North America when transporting hazardous materials that are not assigned a UN number or when transporting under specific North American exceptions.
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