•Figure 20, - - - Three stages of the removal of oil slick f rom the 

 surface of the water . ~~ 



1» Cmde oil floats and spreads over the surface of 

 sea water* 



2* Oil slick is treated with carbonized sand* 



3* After agitating the surface, large lumps of 

 oarbonleed sand with absorbed crude oil sink 

 to the bottom* The surface of the water is 

 clear* 



