As a precautionary safety measure, the City of Leduc is continuing to advise residents and visitors to refrain from entering Telford Lake.
Initial tests indicated that ethylene glycol was present in water near a storm sewer outfall, but the chemical was non-detectable elsewhere in the lake. The city flushed the affected line and the remaining fluid was moved out. As a result, a second test determined the presence of ethylene glycol near the outfall.
The line will be flushed again to ensure any remaining contaminants are removed, and the surrounding water will be retested next week. This plan was approved by Alberta Environment and Sustainable Resource Development.
Due to the rapid deterioration of the diluted chemical, ethylene glycol levels near the outfall are expected to be much lower by the end of next week.
The City of Leduc will provide an update next week, and it is anticipated that Telford Lake will be re-opened.