*
Suncor Energy issued all clear after a boilerfeedwaterleak and was shutting down the unit at its Sarnia, Ontariorefinery, according to a community alert message.
* "Earlier this morning the Suncor Sarniarefinery experienceda water leak in one of our unit heaters… there are nohazardous materials involved," Suncor said in an email response.
* The company had earlier issued an alert on theSarnia-Lambtonalert site for a unit upset causing high flaring, steam, andnoise.
* Suncor operates a 85,000 barrel-per-day (bpd) refinery inSarnia, according to the company website.
(Reporting by Swati Verma in Bengaluru)