3) to measure near-bottom and near-surface dissolved oxygen concentrations and 

 vertical profiles of temperature and salinity at the CLIS-90 buoy location and 

 reference areas to evaluate the potential role of dissolved oxygen for 

 explaining observed differences in organism-sediment properties between the 

 disposal site and the three CLIS reference areas; and 



4) to collect additional PAH baseline information at the three reference areas. 

 The 1991 monitoring program at CLIS tested the following predictions: 



• Sediment disposed since September 1990 would result in the formation of a 

 mound with a radius of 200-250 m. 



• Benthic recolonization at CLIS would be mostly in Stage I on the recently 

 capped CS-90-1 mound and CLIS-90 buoy mound. The inactive mounds were 

 predicted to be mainly in a Stage m condition. 



• Near-bottom dissolved oxygen concentrations would be high (and comparable) 

 at both the disposal site and the three reference areas. 



Monitoring Cruise at the Central Long Island Sound Disposal Site, June 1991 



