1 cruises. This is the April cruise, the later cruise, and this is the 



2 March cruise. 



3 This is at the well site and these levels are comparable. This is 



4 around 5,000 parts per million which is comparable to what we see at 



5 exploratory drilling well sites; it is what we saw at the Mid-Atlantic 



6 and what we have seen elsewhere. 



7 As always, these levels drop rapidly with down current distance, 



8 so somewhere, 1 to 1 1/2 kilometers from the rig, these sediment barium 



9 concentrations are back to background. 



10 Again, had we analyzed the fine fraction as Mike did in the 



11 Georges Bank study, I am sure these levels would have extended further 



12 out and we would have been able to detect higher levels further along. 



13 As you move into the canyon, the silt fraction becomes greater and 



14 so it is not as sensitive as it was on Georges Bank where you had such a 



15 small clay/silt fraction. Anyway, this was certainly in agreement with 



16 what we had seen in the past. 



17 (Slide) 



18 Now, I want to talk a little bit about the sediment traps. The 



19 sedimentation rates in milligrams per square meter per day were 



20 comparable to what we had seen in the literature, ranging from 30 to 350 



21 in the upper water column, a 100, a 1,000, in the lower water column, 



22 and in the canyon itself, higher yet. We had one with this real high 



23 rate, that outlyer, which I guess part of the canyon collapsed on our 



24 sediment trap or something. 



25 Anyway, we had the metals concentration in the traps, of course, 



26 much higher than in the sediment. Again, the upper water column, which 



27 is the closest to the rig, had the highest barium levels. That is a 



28 high of 67,000 parts per million. Then, as you move further away, the 



29 concentrations went down until you got into the canyon. As you, of 



30 course, increase the mass in the trap, you saw less and less effect of 



31 the rig. 



32 Chromium levels were clearly elevated here, probably here, 



33 probably not in the--chromium levels were not elevated in those in the 



34 traps. 



162 



