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that act as chronic sources to the aquatic environment. If this 

 is not done, recontamination will occur and the short-term 

 solution will have to remain in effect. 



Should additional federal resources be spent in this 

 area? 



ANSWER Dr. Engler: In the near-term, probably the most cost- 

 effective return on any federal investment in this area would be 

 in developing efficient and innovative treatment technologies for 

 isolated source "hot spots" of contaminated sediments. Extensive 

 treatment of the typically large volumes of marginally 

 contaminated sediment would probably not be cost-effective for 

 the foreseeable future. 



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