Marathon Petroleum’s 561,000 b/d Galveston Bay refnery in Texas City, Texas, experienced an ultracracker unit upset last week. Refnery crews discovered a pinhole leak in piping leading to a slop tank on 11 January, according to a fling to state environmental regulators. The pipe was isolated, and the leak stopped the same day. Marathon Petroleum does not comment on refnery operations.
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