47 



Table 4-1 



Metal Concentrations (ppm Dry Weight) in Sediments 

 Collected at NLON, CLIS, and WLIS in 1986 and 1987 



Metals 



Cd 



Zn 



(ppm dry weight) 







NLON-REF 







1986 



<3 



45 ±27 



1987 



ND 



NA 



CLIS-REF 







1986 



ND 



110±4 



1987 



ND 



121±9 



2500W 







1987 



ND 



153+7 



4500E 







1987 



ND 



148±10 



WLIS-REF 







1986 



<3 



141 ±52 



1987 



ND 



135±9 



2000S 







1987 



ND 



99±18 



2000W 







1987 



ND 



215±2 



Reference areas in Long Island Sound 



NLON: New London Disposal Site: SAIC 1989; SAIC 1990c 



CLIS: Central Long Island Sound Disposal Site: SAIC 1990d; SAIC 1990e 



WLIS: Western Long Island Sound Disposal Site: SAIC 1987; SAIC 1990f 



All samples were 0-2 cm in depth. 



NA = Not Analyzed ND=Not Detected 



Monitoring Cruise at the New London Disposal Site, June 1991 



