Table 3-10 



Trace Metal Concentrations in Samples 



Collected from the Seawolf Mound Cores, July 1998 



95 



CORE/ZONE 



Depth 



Radius 



Core 



As 



Cd 



Cr 



Cu 



Pb 



Hg 



Ni 



Zn 





(m) 



(m) 



Type 



ppm 



ppm 



ppm 



ppm 



ppm 



ppm 



ppm 



ppm 



Inner zone 

























22A 



0-0.5 



0-200 



Short 



9.0 



0.18 



38 



18 



21 



<0.10 



22 



67 



24A 



0-0.5 



0-200 



Short 



5.1 



0.14 



33 



13 



17 



<0.10 



20 



57 



25A 



0-0.5 



0-200 



Short 



7.2 



0.15 



37 



15 



21 



<0.10 



22 



65 ! 



Mean 









7.1 



0.16 



36 



15 



20 



<0.10 



21 



63 



Middle zone 

























18A 



0-0.5 



200-400 



Short 



7.9 



0.21 



40 



23 



26 



0.21 



22 



74 



20B 



0-0.5 



200-400 



Short 



8.8 



0.25 



39 



22 



29 



0.11 



23 



76 



21A 



0-0.5 



200-400 



Short 



4.1 



0.16 



23 



11 



17 



<0.10 



12 



40 



Mean 









6.9 



0.21 



34 



19 



24 



0.16 



19 



63 



Outer zone 

























14B 



0-0.5 



400-600 



Short 



6.6 



0.16 



51 



120 



88 



<0.10 



71 



340 



15A 



0-0.5 



400-600 



Short 



9.4 



0.12 



34 



14 



21 



<0.10 



21 



61 



16A 



0-0.5 



400-600 



Short 



6.6 



0.18 



31 



20 



21 



<0.10 



18 



59 



Mean 









7.5 



0.15 



39 



51 



43 



<0.10 



37 



153 



Mean, short cores 







7.2 



0.17 



36 



28 



29 



0.07 



26 



93 



All zones, long cores 























23A 



0.50-0.75 



0-200 



Long 

















58 j 



23A 



0.75-1.00 



0-200 



Long 

















72 



23A 



1.00-2.00 



0-200 



Long 

















130 



19A 



0.50-0.75 



200-400 



Long 

















65 



19A 



0.75-1.00 



200-400 



Long 

















73 



19A 



1.00-2.00 



200-400 



Long 

















62 



17A 



0.50-0.75 



400-600 



Long 

















95 



17A 



0.75-1.00 



400-600 



Long 

















70 



17A 



1.00-1.70 



400-600 



Long 

















78 



Mean 























78 



All Data Summary 























Mean 









7.2 



0.17 



36 



28 



29 



0.07 



26 



86 



Std. Dev. 









1.8 



0.04 



8 



35 



22 



0.05 



17 



93 



Maximum 









9.4 



0.25 



51 



120 



88 



0.21 



71 



340 



Minimum 









4.1 



0.12 



23 



11 



17 



0.05 



12 



40 



All Data, except 14A (and 23A 1.0-2.0 m 



for Zn) 



















Mean 









7.3 



0.17 



34.38 



17.00 



21.63 



0.07 



20.00 



66.46 



Std. Dev. 









1.9 



0.04 



5.55 



4.41 



4.10 



0.05 



3.59 



12.64 



Maximum 









9.4 



0.25 



40 



23 



29 



0.21 



23 



95 



1997 Data Summary Mean 







7.5 



0.32 



39 



29 



25 



0.12 



22 



95 



References 

























WEST REF 



26A 







4.0 



0.08 



14 



8.5 



11 



<0.10 



6.9 



35 



Pre-dredge 



UDM Mean (1992) 





12.6 



2.90 



108 



139 



126 



0.40 



65 



235 



Pre-dredge 



UDM Mean (1990, 94) 





7.8 



1.20 



40 



32 



44 



0.20 



17 



79 



Pre-dredge 



CDMMean( 1990,94) 





6.3 



0.70 



39 



22 



27 



0.09 



18 



68 



Units are mg/kg dry weight. 



For data below detection, one half of the reported detection limit was used for statistical calculations. 



Monitoring Cruise at the New London Disposal Site, Seawolf Mound 1995 - 1998 



