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expect those to be followed. there are some activities that we don't have procedures. >> and how do you make that distinction? >> i'm not involved in that detail. it's the judgment of the people involved with the operations, and when i say the people involved, not only the people directly involved, but also our technical authorities, et cete cetera. >> but if you to the extent you have a role in overseeing or assessing safety management, if you detect situations where there is uncertainty on the part of the people performing those operations, would you agree with me that one of the w...

the buildings, and we're a long way down that journey on that. there was an issue around blow down stacks, particularly with hydrocarbons that are heavier than hair. fortunately, in our onshore business, we don't have any heavier than air blow down stacks, but what we did do is we said, well, but what about hydrocarbons that are lighter than air, so we did make some modifications to some of our blow down stacks and dryers, so i think there was a lot we learned from texas city that we've applied and i can speak pourfully to the busy know, but i believe other parts of our business have...