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PLATINUM GROUP METALS LTD

For the period ended Aug 31, 2024. Filed Oct 9, 2024.

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Aug 31, 2024 · Filed Oct 9, 2024

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Contents

EX-99.1 · Table 16-86: Estimated Average Daily Potable Water Usage by Complex

Table 16-86: Estimated Average Daily Potable Water Usage by Complex

Facility DescriptionNorth Complex Average FlowL/dCentral Complex Average FlowL/dSouth Complex Average FlowL/d
Refuge Station Sinks / Bottle Fills9,7929,7927,344
Main Workshop Sinks9,7929,7929,792
Latrine Sinks61,20061,20058,752
Leakage (10%)8,0788,0787,589
Total88,86288,86283,477

16.7.7.4 Compressed Air

Plant compressed air from surface will be supplied to the main workshop areas and permanent refuge stations via 50-mm piping routed through the main service decline. Compressed air from surface will only be provided to the main underground workshops and as a source of emergency breathing air to two permanent refuge stations in each Complex. There will not be a mine-wide compressed-air reticulation system. The underground compressed air requirements from the surface plant are limited to an average of 1.3 m 3/min for each Complex.

The development and production drills will be electric-hydraulic and compressed air requirements will be supplied by on-board compressors or portable compressors. Operating equipment requiring compressed air will have fit-for-purpose onboard air compressors or portable compressors.

Underground satellite workshops will have stationary electric air compressor units.

16.7.8 Personnel and Material Movement

All personnel and materials will be transported to / from the underground workings via mobile equipment traveling in the main service decline.

Waterberg Technical Report

16.7.8.1 Personnel Movement

Personnel carriers will be used to move workers to / from underground workplaces at the start and end of each shift. There will be 30-person bus-style carriers and smaller 8-person carriers. Workers that operate equipment that travels to surface at the start and end of each shift will not require bussing.

16.7.8.2 Material Movement

Consumable materials, equipment, and maintenance parts will be delivered to designated underground storage locations using cassette trucks and flatbed boom trucks. Service LHDs that can be equipped with forks will be used to move larger pieces of equipment.

16.7.9 Electrical Infrastructure

The underground electrical distribution system and associated substations will originate at the connection to the surface power distribution system at each of the three portals and include distribution to all underground equipment and related services. Mine power distribution riser diagrams were prepared for each Complex.

16.7.9.1 Power Distribution and Redundancy

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