NEW YORK, July 6 (Reuters) - Royal Dutch Shell shutdown a fluid catalytic cracker at its 70,000 barrel-per-dayrefinery in Sarnia, Ontario on Monday for a week of maintenance,according to a source familiar with the plant's operations.
The company is replacing the exchanger in the catalyticcracker - a main gasoline producer - and the unit is expectedto restart by the end of the week, the source said.
The company did not immediately respond to requests forcomment. (Reporting By Jarrett Renshaw; Editing by Chizu Nomiyama)