NGTL encloses its Commitment Tracking Table No. 1. This submission is in response to both Section 52 Condition 6 and Section 58 Condition 7 located in Appendices II and III of the Report.

In accordance with Certificate Condition 6 and Order Condition 7, NGTL encloses Commitment Tracking Table No. 8 for the Project. The reporting period for this submission is September 1, 2017 to 28, 2017.

In accordance with Certificate Condition 6 and Order Condition 7, NGTL encloses Commitment Tracking Table No. 7 for the Project. The reporting period for this submission is July 29, 2017 to August 31, 2017.

This report describes the Commitment Tracking Table No. 4 dated from September 2, 2015 to May 31, 2017 for the Towerbirch Expansion Project.

TransCanada Pipelines Ltd — Second Quarter (Q2) Report — 2020