site. The second survey in May, 1978 (Fig..c-3 (a-g) was relocated eastward 

 to examinethis location and it was found that the area would be an excellent 

 location for a disposal site as the lithology would be similar to spoils 

 dredged from the Portsmouth harbor. The most likely location for a disposal 

 point would be in a small valley between two outcrops at a depth of 78 m. The 

 presence of the outcrops would discourage dragging and the criteria of similar 

 lithologies would be satisfied. Further work to define this disposal site 

 will be accomplished in the near future. 



Currents 



No current measurements have been made at the Isles of Shoals site since 

 the actual disposal area has not been defined. 



Sediments 



Heavy metal analysis of sediments from the Isles of Shoals site and the 

 Pescataqua River are presented in Table C-l . These data fit the iron/metal 

 model reasonably well. The samples from the disposal site are typical of un- 

 spoiled areas while those from the river are enriched in metals relative to 

 iron. Such a situation would contribute to the monitoring of spoils should 

 disposal occur. 



Biochemi cal Studi es 



A mussel cage has not been placed in the disposal area because no specific 

 site has yet been determined, however, a reference station was established on 

 the eastern side of Smuttynose Island and was sampled beginning on August 21, 

 1977. M. modiolus from this station appear to show the greatest quantitative 

 changes compared to baseline data of all the northern New England sites. As 



