EXECUTIVE SUMMARY (cont.) 



Both bathymetric and modelled dredged material thickness estimates were consistent 

 with the presence of a thick (1.5 m) New Haven cap on the surface of MQR. The cap 

 sediments contained relatively high PAH concentrations, indicating that the material dredged 

 from New Haven Harbor for the MQR cap contained these contaminants at the time of 

 disposal. PAHs have been included as part of the regional testing protocol since 1989, so 

 that at the time of disposal (1982), the presence of PAHs would have been overlooked by 

 routine chemical testing. New Haven Harbor material has been used successfully as cap 

 material at other CLIS capped mounds. In the case of MQR, material may have been 

 dredged from inner New Haven Harbor, which is influenced by the input of both Mill and 

 Quinnipiac River sediments. 



