colusa's responsibility to negative test. do you agree? >> i think that is the right statement from the bp perspective. >> mr. bly, do you agreed that pressure test is the only one that tested the cement in the wealth that's correct yes. >> yes, sir? >> i should along animation this morning. i think you were probably watching. did you see anything incorrect but that animation that we went through, showing how pressure went up and down, how decisions were made? >> the negative test? >> i could not track every step of the way. >> but nothing jumped out at you? i just want to make sure that we got it right. >> that was quite a lot of detail you showed. >> mr ambrose? >> there was lots of -- there was a lot of detail. i could not tell and alignment. >> it does bp have a policy where its people can call back when there aren't these types of thesenomaliesa -- reare types of data anomalies? >> it is an interpretation issue. absolutely, it is not policy. that is to behavior we expect from people. >> there is no clear policy saying, this is a need

colusa went back to make a call. that is an open issue in our investigation right now. >> bp decided to use for thousands gallons of displacer in the negative pressure test. circulation materials were still up on the reagan -- rig. is that correct? >> that is correct. that is what we have got in our report. 450 barrels. >> decision was it? >> i cannot remember the specifics of how the decision was made. i suspect that the wellside leader was involved. >> dino if anybody -- do you know if anybody had used the combination of these materials as a spacer before? >> i do not know. >> did your team to an analysis about whether these materials could be combined? >> we look that what that material would be cave like, yes. >> what was your conclusion? >> we did not make that conclusion. we looked at what the material be paid like when combined. it was resistant and heavy. >> so i think one of your conclusions or hypotheses about why there was zero pressure in the fuel line was perhaps that spacer actually leaked and clogged t