Table 1-1 

 Time series of Bathymetric Surveys over the Seawolf Mound 



Survey Date 



Description 



Conducted by: 



October 1995 



Baseline 



Gahagan and Bryant, Inc. 



December 1995 



Precap (UDM) 



Gahagan and Bryant, Inc. 



February 1996 



Postcap (CDM) 



Gahagan and Bryant, Inc. 



September 1997 



1.5 yr. after Postcap 



SAIC 



July 1998 



2.4 yr. after Postcap 



SAIC 



1.3 Monitoring Activity 



1.3.1 September 1997 Monitoring Survey 



The September 1997 field effort consisted of a 1000 x 1000 m bathymetric survey, 

 Remote Ecological Monitoring of the Seafloor (REMOTS®) sediment-profile photography, 

 benthic grab sampling, and sediment coring over the Seawolf Mound. The specific 

 objectives of the 1997 monitoring survey over the New London Disposal Site and the 

 Seawolf Mound were to: 



• Use sediment profile photography to assess the benthic recolonization status of the 

 Seawolf Mound relative to the three reference areas surrounding NLDS; 



• Collect cores along cross-sections of the Seawolf Disposal Mound to characterize 

 the physical and chemical composition of the sediments and to verify the presence 

 of at least 50 cm of cap material; 



• Examine the benthic infaunal species diversity and relative abundance over the 

 surface of the Seawolf Mound through analysis of six sediment grab samples; 



• Perform a detailed master bathymetric survey of the region surrounding NLDS as 

 defined by the 1982 FPEIS; and 



• Document and delineate any changes in bottom topography (accumulation and 

 consolidation) in the areas of concentrated disposal since August 1995. 



Analyses of data collected during the September 1997 field effort at NLDS were used to 

 test several hypotheses consistent with the DAMOS Tiered Monitoring Protocols (Germano et 

 al. 1994). First, it was hypothesized that the past two years of disposal activity at NLDS had 



Monitoring Cruise at the New London Disposal Site, Seawolf Mound 1995 - 1998 



