Motiva Enterprises reported emissions at its refinery in Port Arthur, Texas.
A statement sent to the Texas Commission on Environmental Quality said the refinery "experienced a loss of primary containment that resulted in air emissions to the atmosphere."
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The emissions began Sunday morning and last about 11 hours, the statement said.
The 600,000-barrel-a-day refinery is located east of Houston. Motiva is a joint venture between Shell and Saudi Aramco.
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The story "Motiva Reports Emissions at Refinery in Port Arthur, Texas" at about 7:05 a.m. ET incorrectly stated that Motiva Enterprises is a joint venture between Shell and Saudi Aramco. Shell divested from Motiva in a split announced May 1, and Saudi Aramco assumed full ownership.
(END) Dow Jones Newswires
June 19, 2017 08:34 ET (12:34 GMT)