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 TIMELINE OF THE DISCOVERY OF THE SPILL ACCORDING TO HUSKY ENERGY AND THE PROVINCIAL GOVERNMENT

 DATE  HUSKY ENERGY GOVERNMENT OF SASKATCHEWAN
   JULY 20  - At approximately 8 p.m. the pipeline monitoring system indicated pressure anomalies as several segments of the pipeline system were being returned to service. As a precaution, crews were dispatched along the gathering system and did not identify a leak (on July 20)  - As a further precaution, aerial surveillance was also organized overnight to fly the length of the pipeline at the first available daytime opportunity.   - Based on an analysis of the operating data, the investigators have concluded that the leak began on July 20, the day before the discovery of the spill. 
    JULY 21  - We decided as a further precaution to start safe shutdown procedures at about 6 a.m- The valves on either side of the river shut in automatically as a part of the shutdown procedures.- Subsequently, on Thursday morning (July 21) we received reports regarding a sheen on the river.   

  Based on a comparison of Govt of Sasktachewan and Husky Energy public communications.