Saturday, September 26, 2026
MiningNewsTerminal
Saturday, September 26, 2026 Admin

RCK.V ·

Rock Tech Receives Results of Initial Leach Test from Georgia Lake Lithium Project

Metallurgy & Processing

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB

Rock Tech Receives Results of Initial Leach Test from Georgia Lake Lithium Project

Vancouver, BC, Canada – June 25, 2019 – Rock Tech Lithium Inc. (the "Company" or

“Rock Tech”) (TSX-V: RCK; Frankfurt: RJIB) is pleased to announce the results from an initial

leach test of ore from the Company’s 100%-owned Georgia Lake lithium project in Ontario,

Canada.

The results of analyses on samples from the Georgia Lake lithium project show that disulphide

could not be found within the rock samples, the detection limit being 0.01% of the total mass.

The results of the laboratory analyses support the review of geological materials which did not

result in any apparent indication of sulphidic minerals potentially producing acid when being

oxidized and the rock analyses performed to date did not include sulphur.

In summary, the laboratory results and the geological characterization confirmed that the

materials are essentially free of sulphidic materials and do not indicate any Acid Rock Drainage

(“ARD”) risk.

“Of particular attention in mining projects are potential impacts on surface waters and

groundwater from ore, waste rock and tailings during and after the life of a mine,” said Dirk

Harbecke, Rock Tech’s chairman. “While additional testing will be conducted in the future, we

can reasonably conclude from these initial tests that waste rock materials and ore handled at

Georgia Lake will not release leachates which could harm the chemical quality of receiving

waters.”

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB

The test results suggest that all mine waste and tailings can be classified as inert waste.

Accordingly, the Company does not anticipate any adverse environmental impacts from placing

waste rock on designated outside dumps or as backfill into open pits. The Company is

contemplating the co-disposal of tailings and waste rock underground or as backfill, thus

reducing the project footprint by eliminating the need for a separate tailings facility.

The Company cautions that while the results have not indicated any potential for ARD, the

results do not provide conclusive evidence that there is no ARD risk and additional testing needs

to be performed on representative samples of waste rock, ore and tailings.

All scientific and technical information in this news release concerning the Georgia Lake lithium

property was reviewed and approved by Karl-Stephan Peters, EurGeol 787, a qualified person

(QP) as defined under National Instrument 43-101.

About the Georgia Lake Lithium Project

Figure 1 - walking along a recently discovered lithium-

bearing pegmatite (not yet included in current

resource estimate)

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB

The Georgia Lake project is a lithium-rich pegmatite vein deposit with measured and indicated

resources of 6.57 million tonnes grading 1.01% Li2O in addition to inferred resources of 6.72

million tonnes grading 1.16% Li2O. The first PEA for the project, focused exclusively on the

main resource area hosting less than 80% of total defined resources, was published in October

2018. Highlights from the PEA included an NPV of $312 million and an IRR of 62.2%.

On behalf of the Board of Directors,

"Martin Stephan"

Martin Stephan

Director, Chief Executive Officer

For further information, please contact:

Brad Barnett

Chief Financial Officer

Rock Tech Lithium Inc.

777 Hornby Street, Suite 600

Vancouver, B.C., V6Z 1S4

Telephone: (778) 358-5200

Facsimile: (604) 670-0033

Email: [email protected]

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policie s of the TSX Venture

Exchange) accepts responsibility for the adequacy or accuracy of this release.

Statements included in this announcement, including statements concerning our plans, intentions and expectations, which are not

historical in nature are int ended to be, and are hereby identified as, "forward ‐looking statements". Forward‐looking statements

may be identified by words including "anticipates", "believes", "i ntends", "estimates", "expects" and similar e xpressions. The

Company cautions readers that forward‐looking statements, including without li mitation those relating to the Company's future

operations and business prospects, are subject to certain risks and uncertainties that could cause actual results to differ materially

from those indicated in the forward‐looking statements.