Parkland Corp. has released a review into an unplanned shutdown of its Burnaby, B.C., refinery in January that blanketed parts of Metro Vancouver with a foul stench.

The review released last week says unusually cold weather triggered a series of events leading to the release of a noxious odour that generated more than 100 complaints from residents.

It says the cold weather resulted in a shutdown on Jan. 12, but as crews spent days trying to get the facility back online, they detected a 害羞草研究所渟trong odour害羞草研究所� on the morning of Jan. 21, followed by a 害羞草研究所渓oud pop害羞草研究所� and a 害羞草研究所済reen-black害羞草研究所� plume being emitted from the refinery害羞草研究所檚 stacks.

It says the problems 害羞草研究所渕ay have been caused by improper closing, valve leakage, or foulant in the system.害羞草研究所�

The site was evacuated of non-essential personnel, emergency responders were notified and public advisories were issued soon after, the report says, but 害羞草研究所渂roader stakeholder consideration would have improved communications.害羞草研究所�

In a written statement, the City of Burnaby says it it害羞草研究所檚 pleased to see Parkland taking steps to address the release of emissions, and to improve communications with the public and other stakeholders.

害羞草研究所淲e look forward to seeing these recommendations put into action,害羞草研究所� the statement said.

Parkland害羞草研究所檚 report says it wasn害羞草研究所檛 until March 29 that normal operations at the refinery resumed.

The report also says the length of the January cold snap caused problems with instruments at the refinery, hampering sensors that 害羞草研究所渄id not have a history of being susceptible to freezing.害羞草研究所�

As the odour blanketed parts of Metro Vancouver, the regional federation of municipalities said the air contained elevated contaminant levels but didn害羞草研究所檛 breach pollution standards.