72°52.64 I W (GHOST-2, Figure 1-1). A Klein Side Scan Sonar System 

 also was used to survey these two sites. The side scan survey 

 lanes were run at 150 meter spacing over a 900 by 900 meter area 

 centered around the same points as the bathymetric surveys. The 

 side scan system was set to a 100 meter sweep on both sides of the 

 towed sensor array to provide complete coverage of the bottom in 

 the two areas of interest. 



2.3 REMOTS® Sediment-Profile Photographic Surveys 



To better delineate the distribution of dredged material 

 and assess benthic recolonization at each mound, the results of the 

 July 1986 REMOTS® surveys were compared to previous surveys at the 

 various mounds. All of the ten mounds within the CLIS disposal 

 site have been surveyed in the past with REMOTS® photography, 

 although the length of these histories as well as the survey format 

 used and number of stations sampled varied (summarized in Table 2- 

 1) . The 1986 results at the disposal mounds were also compared 

 with those at the new CLIS reference station, where twenty 

 replicate REMOTS® photographs were obtained in a random pattern. 

 A brief history and a summary of the methods employed at the 

 individual disposal mounds follow. 



At the FVP mound, numerous REMOTS® surveys were conducted 

 prior to and following disposal in 1983. The results from the most 

 recent surveys in June and October 1985 (Table 2-1) were compared 

 to the present results. The July 1986 survey was conducted 31 

 months after disposal of contaminated Black Rock Harbor sediment 

 at FVP and 10 months after the passage of Hurricane Gloria over 

 Long Island Sound (September 27, 1985). As documented in DAMOS 

 Contribution #57, Hurricane Gloria was an extremely high energy 

 event which caused physical disturbance of the top few centimeters 

 of the seafloor at the FVP mound (SAIC, 1989a) . However, even 

 prior to the hurricane there were indications that the region was 

 experiencing stress factors during much of 1985. Chief among these 

 stress indicators was a relatively shallow apparent RPD depth at 

 stations throughout the FVP mound and exisiting CLIS reference 

 station and the dominance of low-order successional infauna. 



In the July 1986 survey at the FVP mound, twelve central 

 stations were considered to be located on the main dredged material 

 mound or mound flanks based on REMOTS® and bathymetric surveys 

 conducted immediately after the FVP disposal operation (Figure 3- 

 18) . The remaining nine stations located off the dredged material 

 mound were classified as edge and ambient. An attempt was made to 

 obtain three replicate REMOTS® photographs at each station. 



The 1986 surveys of STNH-N and STNH-S intersect at the 

 approximate topographic centers of each disposal mound (station 

 Center) . Stations were located at 200 meters in each quadrant of 

 these sampling grids. Both the STNH-N and STNH-S mounds originally 



