Uptake and depuration by organisms have been the subjects of many 

 laboratory experiments (e.g. Neff et al., 1976; Roesijadi et al., 1978) 

 but relatively few real spill scenarios (e.g. Boehm et al., 1982; 

 Grahl-Nielsen et al., 1978). 



This report is intended to present an overview of the chemistry 

 program along with enough supporting data and interpretations for each 

 program element to make this a self contained document. After a 

 methods section, a summary of the general findings is presented. 

 Discussions of the analytical chemical and biogeochemical findings of 

 each of the six specific investigations follow; the last section draws 

 conclusions from the study as a whole. Much of the raw analytical data 

 has been omitted here for brevity. Tabulations of analytical data are 

 available either from the individual principal investigators or 

 from the chemistry group. This data has formed the basis of several 

 publications to date (Calder and Boehm, 1981, Boehm et al., 1981, Atlas 

 et al., 1981, Winfrey et al. 1981) as well as several manuscripts in 

 preparation. Additional interpretative details are found in these 

 manuscripts. 



METHODS AND MATERIALS 



As part of the NOAA/CNEXO research program to examine the long- 

 term fates and effects of the spill, we obtained samples of frozen 

 intertidal surface sediment, benthic sediment, sediment cores, oysters, 

 flatfish and macroalgae from a number of U.S. and French investigators 

 (Table 1) . 



TABLE 1. Summary of AMOCO CADIZ chemistry program. 



1 - Chemical Composition, Weathering, and Concentrations in 



Surface Intertidal Sediments (Atlas; Calder): 1978-1981 



2 - Chemical Composition, Weathering, and Concentrations in 



Subtidal Sediment (Marchand, Courtot) : 1978-1979 



3 - Chemical Composition, Weathering, and Concentrations in 

 v Intertidal Cores (Ward): 1978-1980 



4 - Chemical Concentrations and Composition of Oil in Oysters 



and Flatfish from Abers (Neff) : 1978-1980 



5 - Chemical Concentrations and Composition of Oil in Variety of 



Fish and Oyster Tissues (Michel): 1978-1979 



6 - Chemical Concentrations and Composition of Oil Associated 



with Seaweeds (Topinka) : 1978-1980 



37 



