< 



cr 



O 



o 

 o i-| 



N C,C, CjP C,C 2 C 3 D C,C ? C 3 

 NNN PPPBDDD 



T B B B 

 T T T 



n 



FLASK 

 TIME 

 SITE 7 



a. 



rmd] 



rT"rfTTtf^ 



J 



II 12 13 14 IS 16 w PR 18 PM 19 20 21 7 2 23 24 25 26 2 7 28 



FIGURE 6. (Left column) Changes in the relative concentrations of aromatic 



hydrocarbons in flow-through experiment with sediment from site 6, 



FIGURE 7. (Right column) Changes in the relative concentrations of aliphatic 

 hydrocarbons in flask experiment with sediment from site 7. 



22 



