Regenera Insights — Proxy Solicitation & Information Statement 2023

Jun 27, 2023

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DELTA CLEANTECH INC.

002, 2305 Victoria Avenue Regina, Saskatchewan, S4P 0S7

ALBERTA SECURITIES COMMISSION 250 5 St SW #600 Calgary, AB T2P 0R6

CSE CANADIAN SECURITES EXCHANGE INC.

First Canadian Place 100 King Street West, Suite 7210 Toronto, ON M5X 1E1

BRITISH COLUMBIA SECURITIES P.O. Box 10142, Pacific Centre 701 West Georgia Street Vancouver, BC, V7Y 1L2

ONTARIO SECURITIES COMMISSION

20 Queen Street West 20th Floor Toronto ON, M5H 3S8

FINANCIAL AND CONSUMERS AFFAIRS AUTHORITY OF SASKATCHEWAN 6[th] Floor, 1919 Saskatchewan Drive Regina, SK, S4P 4H2

June 27, 2023

Dear Sirs/Mesdames:

Re: Confirmation of mailing – Delta CleanTech Inc. (DELT: CSE) (FRA:66C) (OTCQB:DCTIF) Proxy-related Material

We confirm that on June 26, 2023 , we sent by mail to all Shareholders the Corporation’s proxy-related material for the July 25, 2023 Annual Meeting of Shareholders. The material included:

• ✓ Notice of Meeting;

• ✓ Management Information Circular;

• ✓ Instrument of Proxy;

• ✓ Interim Report Reply Card; and

• ✓ Proxy return envelope.

We further confirm that the record date was published in the Globe and Mail on May 22, 2023.

Sincerely,

“Michelle Westerman”

Michelle Westerman BLC LLB

Legal Affairs Executive