3.4 Sediment Cores (Ward, Montana State University) 



An extensive series of sediment cores was obtained and analyzed by 

 GC and selected samples analyzed by GC/MS for detailed aromatic hydro- 

 carbon profiles. Samples were analyzed in support of anaerobic petro- 

 leum biodegradation experiments (e.g. Winfrey et al . , 1981). Three 

 impacted sites and three control sites representative of beach, aber 

 (estuarine) and marsh environments were selected (Table 15, Fig. 

 3.39). 



TABLE 15. AMOCO CADIZ chemistry program, inter- 

 tidal cores (Ward) . 



Frequency: 



December 1978 16 



March 1979 28 



August 1979 16 



November 1979 10 



May 1980 12 



Total 82 



Locations : 



Oiled : 



AMC-4 (Portsall) - beach 



L'Aber Wrac'h - estuary 



He Grande (South-Oiled) - 

 marsh 



Unoiled: 



He Grande (North-Control) 

 marsh 



Trez Hir - beach 



Aber Ildut - estuary 



Other Stations: 

 Station 11 

 Station 12 

 Baie de Morlaix 

 Port de Concarneau 



GC/MS: 



Several selected cores 



70 



