17 



Table 2-3 

 Pre-Dredge Cap Material Bulk Sediment Characteristics 



Dredge Location: 

 Sample ID*: 



Year Collected: 



New Haven 



GE-1 to 

 GE-3 



1978 



New Haven 



FD-5, FD-7 



1979 



Norwalk 

 (Cap) 



PE6 

 1979 



Quinnipiac 

 River 



PE-3, PE-4, 

 PE-10 



1980 



Liquid Limit 



112- 117 



139, Non- 

 Plastic (NP) 



108 



96 - 148 



Plastic Limit 



42-46 



52, NP 



46 



43 -60 



Plastic Index 



69-71 



87, NP 



62 



53 - 88 



% Solids 



30-34.16 



20.87-71.40 



38 



38.17 -45.6 



Sediment pH 



7.3 -7.5 



6.8-7.0 



7.4 



6.4-7.2 



% Volatile Solids 



5.5 - 6.49 



0.8-7.7 



5.2 



7.56- 13 



ppm Oil & Grease 



1750 - 3235 



340 - 7740 



2240 



2100 - 2410 



ppm Mercury 



0.6-0.7 



0.25 - 0.74 



1.7 



1.8-2.9 



ppm Lead 



107 - 131 



38 - 210 



61 



180 - 270 



ppm Zinc 



234 - 250 



41 - 472 



190 



307 - 995 



ppm Arsenic 



5.4-7.6 



2.0- 11.6 



4.8 



2-7 



ppm Cadmium 



2.3 -4.8 



0.1 -7.0 



4.0 



330 - 490 



ppm Chromium 



NA 



NA 



94 



NA 



ppm Copper 



154 - 192 



59 - 367 



188 



410 - 530 



ppm Nickel 



26-60 



25 -87 



39 



85 -94 



ppm Vanadium 



58-66 



9-70 



16 



50-80 



* Samples collected prior to dredging; station locations are shown in Figures 2-3, 2-4, 2-6. 

 NA = Not available 



Sediment Capping of Subaqueous Dredged Material Disposal Mounds 



