PORTSALL 23-3-78 



FPD 





1/ --sj 



% 



AW 22-11-78 



irf**4 



n~r 



AW 20 6 -79 



'■si 



FPD 



"vm 



FID 



AW 17-1-80 



SK J 



-». ~t\ 



AW 24-6-80 



STATION 8 



FIGURE 16. Evolution of aromatic hydrocarbons. 

 128 



