exposed to BRH Wetland sediment would not accumulate 2,3,7,8- 

 tetra-CDD concentrations above the FDA "Levels of Concern" for 

 this compound. This is, however, a highly speculative estimate. 



Black Rock Harbor sediment could probably be considered 

 to be moderately contaminated with PCDDs and PCDFs compared to 

 the few reported literature concentrations of these compounds in 

 sediments. Because the BRH Original Composite is a homogenized 

 sample, it is possible that higher concentrations of these 

 compounds exist in some areas of Black Rock Harbor. The levels 

 measured in the present study may be high enough to warrant 

 studies of the spatial and vertical distributions of these 

 compounds in the sediments of Black Rock Harbor. 



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