(Adds further company comment)
HOUSTON Dec 15 Valero Energy Corp (VLO.N) said
a gas oil hydrotreater was shut after a steam header failed on
Monday morning at its 135,000 barrel per day (bpd) Los
Angeles-area refinery in Wilmington, California.
Valero began restarting the hydrotreater on Monday
afternoon, but does not expect to know how production will be
affected at the refinery until Tuesday, said spokesman Bill
"We don't expect the upset to have a serious impact on
production at this point, but we won't know until tomorrow,"
Day said in a statement.
(Reporting by Erwin Seba; Editing by Marguerita Choy)