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wetland animals appear to contain contaminants. The level of 

 contamination of animals is being evaluated and will be 

 interpreted for the need for controls and restrictions as deemed 

 necessary. 



Is this a viable technology? What types of constraints 

 exist for this technology? 



ANSWER Dr. Engler: The use of marginally contaminated dredged 

 material for wetland creation appears to be a viable technology. 

 However, the level and type of contamination that can be 

 considered marginally contaminated needs to be defined. 

 Depending upon results of the studies noted above, creation of 

 wetlands on contaminated dredged material similar to that 

 referenced for Times Beach CDF at Buffalo, NY or the FVP site at 

 Bridgeport, CT may or may not be a viable technology, if 

 contaminant uptake is found to be a problem. If this is the 

 case, some control or restrictions such as capping the 

 contaminated material with cleaner material may be necessary. 

 This should isolate the contaminated material from wetland animal 

 contact and exposure. While this may be a viable technology, it 

 should be demonstrated further prior to widespread application. 



What potential problems exist? 



ANSWER Dr. Engler: Potential problems include: contamination of 

 food chain organisms associated with wetland animals colonizing 

 contaminated or marginally contaminated dredged material; erosion 

 of the cap of clean material, exposing the contaminated material 



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