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Dundee Sustainable Technologies Inc.NEWS RELEASEDST ANNOUNCES POSITIVE GOLD EXTRACTION RESULTS USING ITS CLEVR PROCESSTMMONTREAL, QUEBEC, April 28, 2020–Dundee Sustainable Technologies Inc. (“DST” or the “Corporation”) (CSE: DST) is pleased to announce positive results from a metallurgical test program utilising DST’s CLEVR ProcessTM(the “CLEVR Process” or “Technology”) on two distinct mineralised samples from a Gold Mining Company (the “Gold Miner”). DST was mandated by the Gold Miner to conduct a metallurgical test program at its facilities in Thetford Mines, Canada. The Corporation received two (2) distinct lots of ~50-kilogram and ~30-kilogram samples of representative material from the Gold Miner’s operating project located in the Asia-Pacific region. The objective of this work was to demonstrate the amenability of the CLEVR Processto extract the gold content from the provided material.InMarch 2020, DST completed the laboratory metallurgical test program and is pleased to announce that the direct application of the CLEVR Process on oxidised samples achieved gold extraction yields of 93.5% and 94.2%respectively for the distinct lots tested. Mr. David Lemieux, President and CEO commented, “Management of DST is very excited of the results obtained with our CLEVR Process with the Gold Miner. This is great news to see major gold miners interested in assessing the benefits and applicability of CLEVR Process on existing gold assets. Our team will continue working with the client to further develop this promising opportunity for DST.” In addition, the solid residues, produced as a result of the CLEVR Process were tested successfully against the U.S. Environmental Protection Agency’s (“EPA”) Toxicity Characterisation Leaching Procedure (“TCLP”, Method 1311) thusconfirmingthey canbe considered as non-hazardous waste. The inert nature of the tailings produced by the CLEVR processrepresent a major advantage in terms of tailings disposal configuration.About Dundee Sustainable Technologies, a corporation controlled by Dundee Corporation The Corporation is engaged in the development and commercialisation of environment-friendly technologies for the treatment of materials in the mining industry. Through the development of patented, proprietary processes, DST extracts precious and base metals from mineralised material, concentrates and tailings, while stabilising contaminants such as arsenic, which could not otherwise be extracted or stabilised with conventional processes because of metallurgical issues or environmental considerations.
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