Table 1 continued. 



Re gion Cd £r Cu Hg Ni Pb Zn tPCB tDDT tPAH 



W. Raritan Bay(I) ** *** *** nd * *** *** nd nd nd 



C. Raritan Bay(II) * ** ** nd * *** *** nd nd nd 



N. Raritan Bay(III) * ** * nd * ** ** nd nd nd 



S. Raritan Bay(IV) - ** * nd * ** ** nd nd nd 



Lower Bay ** * * ** nd * nd ** * * 



Jamaica BaydD ** * ^ ^ * ** * * 



*** Average concentration > ERM value; 



** Only maximum concentration > ERM value; 



* ERL value < maximum concentration < ERM value; 



- maximum concentration <ERL value; 

 nd - no data. 



Based upon the multiplicity and degree of exceedances of the effects range values in Table 1 , it appears 

 that sediments in some regions of the estuary have a very high potential for causing toxicity. Also, 

 based upon the number and degree of exceedances of the effects values, it appears that the potential for 

 toxicity differs among the regions. The regions evaluated by Squibb et al. (1991) are hypothesized to 

 have the following relative potentials for toxicant-associated effects: 



•Extremely high potential for toxicity: 



• Newark Bay; 



• Arthur Kill. 

 •High potential for toxicity: 



• East River bays; 



• vicinity of Ward's Island; 



• Upper Bay; 



• Gowanus Canal; 



• lower Hackensack River; 



• lower Jamaica Bay. 

 •Moderate potential for toxicity: 



• East River; 



• Hudson River; 



• Kill van Kull; 



• lower Passaic River; 



• western Raritan Bay; 



• central Raritan Bay; 



• Lower Bay; 



• upper Jamaica Bay. 

 •Lowest potential for toxicity: 



• Harlem River; 



• northern Raritan Bay; 



• southern Raritan Bay. 



