TRANSURANIC AND TRACER SIMULANT RESUSPENSION 275 



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Truck driven 

 through tracer 



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Car driven 

 through tracer 



10 100 



TRUCK SPEED, mph 



1000 



Fig. 25 Rates of tracer particle resuspension caused by vehicle passage over an asphalt 

 road 4 days after particle deposition. 



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Truck, cheat grass road 



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10 

 VEHICLE SPEED, mph 



50 



Fig. 26 Rate of tracer particle resuspension caused by vehicle passage over asphalt and 

 cheat grass roads. 



