REMOTS® stations, arranged in a cross-shaped pattern and spaced 100 m apart. Three 

 replicate photographs were collected at each reference station. 



2.3 Sediment Sampling and Analysis 



A Smith-Mclntyre grab sampler (0.1 m^) was used to collect triplicate sediment 

 samples at the center of the three reference areas: CLIS-REF, 4500E, and 2500W (Figure 2- 

 1). At each station, four polycarbonate plastic core liners (6.5 cm ID) were pushed into the 

 grab sample, extracting a minimum of 10 cm of sediment. Three of these cores were 

 combined and placed into a sealed plastic bag for chemical analysis. The remaining cores 

 from each of the triplicate grab samples were combined and sealed in plastic bags for grain 

 size analysis. The samples were packed in ice and delivered to the NED laboratory for 

 analysis. Analytical results were incomplete at the time of report preparation and will be 

 included in a future report. 



2.4 CTD and Dissolved Oxygen Sampling 



Conductivity, temperature, and depth and DO information characterized depth 

 gradients and assessed near-bottom dissolved oxygen concentrations relative to REMOTS® 

 benthic analyses on and near the disposal site. CTD casts collected salinity and temperature 

 profiles at the center of the three reference areas (2500W, 4500E, and CLIS-REF), at the 

 CLIS-89 buoy location, and at four points 300 m north; south, east, and west of the buoy. 

 Niskin casts at CLIS-89, CLIS-REF, 4500E, and 2500W collected water samples 

 approximately 1 m above the bottom for dissolved oxygen analysis. A 300 ml subsample 

 from the Niskin bottle was analyzed immediately following retrieval using a modification of 

 the standard Winkler titration method (Strickland and Parsons 1972, Parsons et al. 1984). 



Monitoring Cruise at the Central Long Island Sound Disposal Site, July 1990 



