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George Buck, chief operating officer for Chevron's Brazilian division, said then that the spill occurred because Chevron underestimated the pressure in an underwater reservoir. He said that caused crude oil to rush up a bore hole and eventually escape into the surrounding seabed. The oil leaked through at least seven narrow fissures on the ocean floor, all within 160 feet (50 meters) of the wellhead. The work at the Frade field in the Campos Basin where the leaks occurred is among Chevron's "biggest capital investments," according to the company's website, which didn't provide details. The company was criticized by officials at the ministry and the regulatory agency for not fully sharing information about the spill in its early days, and of not having proper emergency equipment to handle the spill.
[Associated
Press;
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