V 



Although these surveys show the depression described by Ityte there 

 is no indication of a spoil pile present in the trough. The location of 

 the disposal buoy would mean deposition of spoils east of the trough, and 

 although there is no indication of a spoil mound in that area, sediment 

 samples from that location have contained spoils, building materials, 

 pipes etc. Another location where samples have indicated spoil disposal 

 was found by Ityte south of the disposal site (Figure A-5). Further work 

 to define the distribution of spoils in this site will continue since 

 there is no obvious pile present at this time. 



A large outcrop of bedrock, as verified by side scan sonar occurs 

 in the southwest corner of the disposal site. This and the north-south 

 trending trough are the only topographic features of significance in the 

 disposal site. 



Currents 



No current measurements have been made in the vicinity of the 

 Rockland disposal site. 



Sediment 



Sediments in the Rockland site are almost entirely composed of soft 



black mud overlying a basement of glacial material. Heavy metal analysis 



of samples taken from the Rockland area are presented in Table A-l . All 



five surface sediment samples taken from the dump site, reference location 



and harbor were metal enriched compared to cleaner areas such as Isle of 



