3.5 Oysters and Plaice (Neff, Battelle) 



Samples of oysters and plaice from several impacted regions 

 (L'Aber Wrac'h, L'Aber Benoit and Baie de Morlaix) and two supposedly 

 unimpacted locations (Brest and Loctudy) were analyzed (Table 17, 

 Figure 3.65) . 



The results of the oyster time series analyses are summarized in 

 Table 18. Both the "gross" hydrocarbon parameters as well as the 

 petroleum-associated aromatic hydrocarbons are presented. Though not 

 "clean", the control (Brest) oysters are several times lower in gross 

 concentration throughout the time period and an order of magnitude 

 lower in aromatic hydrocarbon content than either of the impacted 

 sites. It is not apparent if the levels have decreased substantially 

 in either of the Abers, though aromatic levels are 3 to 4 times lower a 

 year and a half after the spill. For comparison, levels of several 

 of the non-petrogenic PAH components (i.e. m/e 252) are presented. 



TABLE 17. AMOCO CADIZ chemistry program; oysters and plaice (Neff) 



Total 37 



Location: 



L'Aber Benoit - Oysters; 

 Plaice Muscle/Liver 



L'Aber Wrac'h - Oysters; 

 Plaice Muscle/Liver 



Loctudy - Plaice Muscle/Liver; 

 Oysters (7/79 only) 



Brest - Oysters 



Baie de Morlaix - Oysters 

 (7/79 only) 



GC/MS 



L'Aber Benoit Oysters 

 L'Aber Wrac'h Oysters 

 Control Oysters 



80 



