Alberta regulator says Imperial Oil faces more water problems at Kearl oilsands mine

Imperial Oil is facing more wastewater problems at its Kearl oilsands mine in northern Alberta.
The Alberta Energy Regulator has issued a notice of non-compliance to the company after chemicals associated with oilsands tailings  were found at an off-site well at levels that exceed provincial guidelines.
Sulphates have been detected at a well that is 100 metres from the Muskeg River, a tributary of the Athabasca River. 
The chemicals are not particularly harmful in themselves, but are t