1 seen was seven-fold, and that's pretty high exposures in laboratory 



2 experiments to get that. 



3 DR. GRASSLE: So, we should try to re-do the calculation now? 



4 DR. TEAL: Yes, of course, but Jerry said yesterday in experiments 



5 with lobsters, unclean and heavily contaminated sediments, where they 



6 had layered the drill mud on top of the sediments, no chromium 



7 accumulation, but barium accumulated on contaminated sediment. I wrote 



8 that down when he was talking yesterday. 



9 MR. VILD: If some animals are accumulating chromium, then that 



10 means it is available in some form. 



11 DR. TEAL: He said no chromium accumulation. 



12 MR. VILD: Yes, I know, but you just said, Jim, in the experiments 



13 that you were just referring to that there was as much as a seven-fold 



14 increase of chromium in the animals. 



15 DR. RAY: With high levels of exposure, there has been, in some of 



16 the laboratory stuff, they've been able to pick up some increase. In 



17 the field stuff, there has been hardly any significant uptake of any of 



18 the metals, but it is in the laboratory stuff where we've been able to 



19 induce some of that. 



20 MR. VILD: Then I guess that goes along with what Jerry was saying 



21 about--I guess it's the hexavalent species of chromium that's taken up 



22 by organisms. Jerry was saying that just about as soon as any 



23 hexavalent chromium hits the sea water, it binds up with organic 



24 material and is immediately reduced to the trivalent form, which 



25 apparently is not available. That would corroborate what you are saying 



26 and what he is saying, too, that in the laboratory, you do see the 



27 accumulation but not in the field, so it's not a problem. 



28 DR. COOPER: We measured chromium and the surficial sediments in 



29 the tissues and organs of lobsters, crabs, and scallops in Georges Bank 



30 just downstream of block 310 at the head of Lydonia. 



31 The sediments ranged from 1 up to about 11 micrograms per gram of 



32 weight; in the animals, it was all the way from nondetectable to 1.5. 



33 We were finding those levels in animals that seemed to be very healthy 



34 and vigorous. 



298 



