Table 7,,,,,,
Hazardous Material Shipment by Hazard Class and Mode of Transportation: 2002,,,,,,
(Commodity Flow Survey data only),,,,,,
Hazard class,Transportation mode,"Tons 
(thousands)","Tons 
(Percent)",,,
"Class 1, Explosives


",Pipeline (2), -   , -   ,,,
,Rail, 352 , 7.0 ,,,
,Truck (1)," 4,631 ", 92.6 ,,,
,Water, -   , -   ,,,
"Class 2, Gases


",Pipeline (2)," 78,857 ", 37.0 ,,,
,Rail," 29,230 ", 13.7 ,,,
,Truck (1)," 96,865 ", 45.4 ,,,
,Water," 7,133 ", 3.3 ,,,
"Class 3, Flammable liquids


",Pipeline (2)," 576,739 ", 32.2 ,,,
,Rail," 36,083 ", 2.0 ,,,
,Truck (1)," 948,619 ", 53.0 ,,,
,Water," 199,304 ", 11.1 ,,,
"Class 4, Flammable solids


",Pipeline (2), -   , -   
,Rail," 3,157 ", 27.9 
,Truck (1)," 6,711 ", 59.4 
,Water," 1,263 ", 11.2 
"Class 5, Oxidizers and organic peroxides


",Pipeline (2), -   , -   
,Rail," 2,430 ", 19.2 
,Truck (1)," 9,870 ", 77.9 
,Water, -   , -   
"Class 6, Toxic (poison)


",Pipeline (2)," 1,753 ", 20.7 
,Rail," 1,908 ", 22.6 
,Truck (1)," 2,255 ", 26.7 
,Water," 2,325 ", 27.5 
"Class 7, Radioactive materials


",Pipeline (2), -   , -   
,Rail, -   , -   
,Truck (1), 52 , 91.0 
,Water, -   , -   
"Class 8, Corrosive materials


",Pipeline (2)," 3,959 ", 4.4 
,Rail," 23,949 ", 26.4 
,Truck (1)," 51,385 ", 56.7 
,Water," 9,552 ", 10.5 
"Class 9, Miscellaneous dangerous goods


",Pipeline (2), -   , -   
,Rail," 12,260 ", 20.1 
,Truck (1)," 39,126 ", 64.1 
,Water," 8,619 ", 14.1 
"
KEY: – Represents and 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.   ",,,
"(1) ""Truck"" as a single mode includes shipments that were made by only private truck, only for-hire truck, or a combination of private and for-hire truck. 
(2) Estimates for pipeline exclude shipments of crude petroleum.     ",,,
"SOURCE: Bureau of Transportation Statistics (USDOT), Research and Innovative Technology Administration, Bureau of Transportation Statistics, and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, table 6a. December 2004. ",,,