-I — i i i i i i i i — i — i — I t ! t — r—r 



1 i i i i i 



ABCDEFGHIJKIMNOPQRSTUVWXYZ 



J L 



77ng ^ 



i i i i — i — i— i — i — i — i — i — i i i — r— i — i — I — r 



ABCOEFGH I J K L M N P R S T Li V w « I Z 



t t I I I 



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5346 4 ng g 



* t i * » i — i — i t t t t I f I — i t r I — i — i — i — i — i — r . 



• BCOEFGH IJKLMNOPQRSTUVWXTZM 



J L 



FIGURE 3.18. (Top) Aromatic hydrocarbons, station 3, March 1980; normal- 

 ized to C3DBT. 



FIGURE 3.19. (Middle) Aromatic hydrocarbons, station 3, June 1981; nor- 

 malized to C3DBT. 



FIGURE 3.20. (Bottom) Aromatic hydrocarbons, station 5, April 1978; nor- 

 malized to C3DBT. 



(See Figure 3.14 for key.) 



56 



