Iable D-3. Heavy Metal Concentrations (ppm) in Modiolus tmiQLUS from Halfway Rock 



DEPLOYED at BoSTON FoUL GrOUND DISPOSAL SITE (NORTHERN NeW EnGLAND). 



Date Udcation Cd Cr Cu- Hg Pb Zn Fe 



8-21-77 



Halfway Rock 



X 



10.78 



2.82 



50.51 



0.274 



23.39 



317 



166 







S.D. 



1.78 



0.49 



6.95 



0.047 



5.76 



97 



71 



S-21-78 





X 



8.77 



5.22 



41.17 



0.218 



11.81 



332 



147 







S.D. 



3.31 



0.88 



10.31 



o.n?5 



1.11 



91 



5 



8-8-78 





X 



9.1? 



2.72 



31.98 



0.315 



15.77 



310 



88 







S.D. 



1.13 



0.09 



1.32 



0.078 



3.01 



72 



2 



S-22-78 Boston Foul x 6.63 2.07 23.21 0.280 6.52 232 122 

 Ground S.D. 0.19 0.57 0.51 0.035 1.12 7-9 



