May 8 (Reuters) - Royal Dutch Shell Plc reportedthe shutdown of a unit after a leak from an isolation valve atits 156,400 barrel-per-day refinery in Martinez, California, onMay 6, according to a filing with the Contra Costa HealthDepartment Hazardous Materials Program.
There was no flaring, and the leak was of a "pitch-likematerial," the filing said.
(For refinery outages in the Reuters Oil Fundamentals Databasesee http://bond.views.session.rservices.com/CE/ or go to )
(Reporting by Naveen Arul in Bangalore; Editing by Gerald E.McCormick)