87 



consistent with the "harder" returns collected by the remote sensor. The "softer" returns 

 from the southwestern quadrant of the NHAV 93 mound were also representative of the 

 percentage of fine-grained material in the sediment as well as the unconsolidated nature of 

 the fresh CDM deposit. 



The acoustic sensors employed during the July 1994 survey at CLIS demonstrated 

 their value as survey instruments by collecting surface and subbottom sediment 

 characterization data. The results of both systems were merged with standard bathymetric, 

 REMOTS®, grab sampling, and geotechnical coring data to develop conclusions 

 concerning the cap thickness, grain size, and topography of the NHAV 93 and MQR 

 mounds. 



Monitoring Cruise at the Central Long Island Sound Disposal Site, July 1994 



