11 OOOng g 



t— i — i — i t I i — I » I I i t 



, i t i — i i t r i i » r t i t f 



ABCDEFQHIJKLMNOPORSTUVWXrZM 



FIGURE 3.15. (Top) Aromatic hydrocarbons, station 3, March 1979; normal- 

 ized to C 3 DBT. 



FIGURE 3.16. (Middle) Aromatic hydrocarbons, station 3, July 1979; nor- 

 malized to C 3 DBT. 



FIGURE 3.17. (Bottom) Aromatic hydrocarbons, station 3, November 1979; 

 normalized to C 3 DBT. 



(See Figure 3.14 for key.) 



55 



