1 percent up to maybe 1 or 2 percent, except for this one, which is the 20 



2 meters deep, 1,500 meters from the rig. It actually got to around 10 



3 percent at that one location on the last sampling interval when more of 



4 the barite was being discharged. 



5 The mud solids make up a very--they are certainly detectible, but 



6 they make up a very small fraction of the solids in the trap and the mud 



7 solids deposition rate is small compared to the natural sedimentation 



8 rate. 



9 (Slide) 



10 This shows it again and it shows that the discharge — this is 



11 discharge rate versus mud sedimentation rate. This is in thousands of 



12 pounds per day, so it ranges from to 30,000 pounds a day of what is 



13 being discharged at the rig, the mud solids. 



14 You can see there is a general increase of the mud solids 



15 sedimentation rate with the amount of solids, so it does correlate, but 

 15 again, I think probably the most important thing is that the natural 



17 sedimentation rate is a good deal greater than the sedimentation rate 



18 from the mud deposition. 



19 (Slide) 



20 Finally, my last conclusion slide is that mud solids were 



21 transported to the canyon, but not in sufficient quantities to affect 



22 the natural sedimentation rate or to be detected in canyon sediments. 



23 Barium levels were elevated in sediments out to a 1,000 to 1,500 meters; 



24 chromium and vanadium were not elevated at all even at the well site. 



25 This is sort of unrelated to the other, but canyon sediments were 

 25 generally less sand even than shell sediments and they were even more 



27 variable in their composition. There are a lot of other conclusions, 



28 but on the graphics, they would only let me get three in one slide. I 



29 will stop right there. 



30 DR. RAY: Why did you all measure vanadium? 



31 DR. AYERS: We got it for free in neutron activation analysis. 



32 Actually, there is, as you know, some interest in vanadium from 



33 petroleum silt. We thought we would measure it, but mainly because it 



34 is free and is another trace. 



164 



