sediment samples for a unique chemical marker of the dredged 

 material from the Saugus and Mystic River projects indicated that 

 the most promising signature was the ratio of arsenic to mercury. 

 Use of this ratio, however, at the disposal site was limited by 

 the low levels of mercury at some locations. 



Overall, the existing data do not show that the Saugus 

 River/General Electric and Mystic River/Blue Circle Atlantic 

 sediments can be detected chemically at the FADS; there are many 

 possible reasons for this. Likely explanations could include 

 inadequate characterization of the material from the dredge site 

 and/or imprecise location information on where these materials 

 were deposited. Given the fact that the total volume of these 

 projects was less than 15% of the entire amount disposed at the 

 "DGD" buoy since its deployment in November 1985, it is not very 

 surprising that a unique chemical signature for these two 

 maintenance projects cannot be found at the disposal site. 



6 . REFERENCES 



Plumb, R.H. 1981. Procedures for Handling and Chemical Analysis 

 of Sediment and Water Samples. Technical Report 

 EPA/Ce-81-1. 



SAIC. 1986a. Seasonal Monitoring Cruise at the New London 

 Disposal Site, July 1986. SAIC Report #86/7540&C60, US Army 

 Corps of Engineers, New England Division, Waltham, MA. 

 DAMOS Contribution #60. 



SAIC. 1986b. Environmental Information in Support of Site 

 Designation Documents for the Foul Area Disposal Site. 

 Submitted to U.S Army Corps of Engineers, New England 

 Division, Waltham, MA, SAIC Report No. SAIC-85/7528&93 . 



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