Documents Show Early Worries About Safety of Rig - NYTimes.com

Documents Show Early Worries About Safety of Rig - NYTimes.com: "“After further consideration,” Mr. Trocquet wrote, “an extension is approved to delay the B.O.P. test until the lower cement plug is set.”
When the blowout preventer was eventually tested again, it was tested at a lower pressure — 6,500 pounds per square inch — than the 10,000-pounds-per-square-inch tests used on the device before the delay. It tested at this lower pressure until the explosion."