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APChevron: Oil in Utah leaked from quarter-size hole
By PAUL FOY (AP)
SALT LAKE CITY — Chevron Corp. said Monday it believes an electrical arc from a power line torched a quarter-size hole in a pipeline that spilled thousands of gallons of crude oil into a Salt Lake City creek over the weekend.
Rocky Mountain Power said the chain of events began with a tree limb that fell onto a power line late Friday, but the utility said it would be highly unusual for an arc to drill a hole in a buried pipeline by traveling through a metal fence post.
Chevron officials said the fence post was anchored within inches of the 3-foot-deep pipeline and could have acted like an electric torch, puncturing a hole in the pipe's metal casing.
"We think of this as a one-in-a-million event," Mark Sullivan, manager of Chevron's oil refinery, said Monday at an oil-coated city pond. He said the systems in place for detecting pipeline leaks never imagined "this very unusual circumstance."
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