samples taken at the center of each reference area and at the disposal point (Table 3- 

 1). Dissolved oxygen concentrations ranged from 4.1 mgl" 1 to 4.5 mgl 1 (2000W and 

 2000S reference areas, respectively). The near-bottom dissolved oxygen 

 concentration at the disposal point was 4.3 mgl" 1 . Surface oxygen measurements 

 made with a YSI DO meter were significantly higher than near-bottom 

 concentrations and ranged from 9.2 mgl 1 (2000W) to 11.8 mgl 1 (WLIS-REF) (Table 3- 

 1). 



Depth gradients of temperature, salinity, and density (as sigma-t) for each 

 reference area and five selected disposal site REMOTS® stations are given in the 

 Appendix. Surface salinity was approximately 27.5 ppt at each of the reference and 

 disposal site stations, increasing slightly (ca. 0.5 ppt) at 20 - 25 m depth. Surface 

 temperatures ranged from 19.5°C (2000W) to 21°C (disposal site stations). Each 

 station exhibited a two-tiered thermocline at approximately 2 - 5 m and 15 - 20 m 

 depth, with bottom temperatures averaging approximately 16.5°C. 



Monitoring Cruise at the Western Long Island Sound Disposal Site 



