RE: IAAC Request for Input, Designation Request of the Summit Mine 14 Project - Due September 8, 2022

Hi Jennifer,

Please find attached an updated ECCC’s FAAR response for the Summit Mine 14 Project. Our original response was updated following a review of addition information received from you on the 9^th of September 2022. The sentence “Selenium is of particular concern for coal projects” on page 4 of our original submission has been updated in this version and now reads as: “There is not enough information to substantiate the claim that selenium is not of concern, notably with regards to groundwater interaction.” For your convenience, I highlighted the change in red in the document.

Our experts reviewed the new information and determined that no actual hydrology or water balance data was provided. The information put forward were limited to conclusions from reports that we cannot analyse. They equally made an observation in relation to a statement on page 10 of the Appendix A Summit Report (section 3.4.2) indicating that Mine contact water pond is sized for a 10-yr precipitation event, with any flows above that to be released. From our experts perspectives, typically, mine contact water is retained in ponds sized for 100-yr events.

Don’t hesitate to contact me if you have any questions.

Thank you and have a nice day.