FBOs and local airports across Canada have been affected by a quarantine of avgas following a quality control problem at the only refinery that makes 100LL in Canada. Imperial Oil's Strathcona refinery in Edmonton issued a directive Wednesday to its wholesale customers saying any avgas they obtained from the refinery from Dec. 28, 2017, shouldn't be used or distributed because it "may cause interference with onboard fuel gauge sensors." Jet fuel is not affected. The problem apparently relates to the conductivity of the fuel and was discovered in the quality control process, according to the Canadian Owners and Pilots Association.
This is a companion discussion topic for the original entry at https://www.avweb.com/ownership/avgas-quarantine-disrupts-ga-in-canada