Suncor finds benzene in ditch water near Sarnia, Ontario, refinery

Tue Aug 13, 2013 7:04pm EDT
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CALGARY, Alberta (Reuters) - Suncor Energy Inc, Canada's largest integrated oil company, said on Tuesday it was treating water from a roadside ditch near its refinery in Sarnia, Ontario, after the chemical benzene was found in two water samples.

The contaminated water samples, taken during a recent storm, were drawn from the ditch located behind the refinery, near an existing remediation site that was established in 2006 after benzene was found in the soil.

Suncor said the sampling was done to better understand the potential impact surface water run-off has on ditch water during prolonged rain.

Company spokeswoman Nicole Fisher said the company closed the ditch sluice gate and installed clay berms around the area to contain the contaminated water. It used pumps and vacuum trucks to help process the water through the refinery's wastewater treatment facility.

The company is continuing to monitor water in the ditch.

Production at the 85,000 barrel per day Sarnia refinery has not been affected.

"Samples drawn from ditch water upstream and downstream of the remediation site did not indicate any benzene levels, so there was no contaminated water that was running off the Suncor site," Fisher said in an email.

Benzene is a highly flammable, organic chemical that forms a natural part of crude oil.

People who drink water with exposure to benzene in excess of the maximum contaminant level of 0.005 milligram per liter for many years may have an increased risk of developing cancer, according to the U.S. Environmental Protection Agency website.   Continued...