Hi Anna,

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As discussed, I’ve attached PUC’s estimate of the required true-up adjustment to RSVA account 1588 related to 2015 RPP settlement variances. Once confirmed, the actual adjustment amount will be settled with the IESO and reduce the credit balance in the account to an immaterial amount.

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Disposing of the current balance of this account, before the 2015 true-up adjustment is applied, will result in PUC requesting to dispose of the adjustment in a future application.

Given that the actual adjustment amount is unknown at this time, in order to eliminate the timing issue with respect to disposition, PUC proposes to apply an adjustment for the full balance of RSVA account 1588, effectively removing it from its claim in the 2017 IRM application.

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PUC believes that all of its other Group 1 RSVA balances are final. Given that the aggregate balance of these accounts results in a credit back its customers, PUC maintains its requests to dispose of these balances.

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Please let me know if you have any further questions or comments.

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Thank you,

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Andrew Belsito, CPA, CMA

Rates and Regulatory Affairs Officer

PUC Services Inc.

Tel (705) 759-3009

HYPERLINK "mailto:andrew.belsito@ssmpuc.com"andrew.belsito@ssmpuc.com

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