Slope Stabilization

Drawings, or just depth, wall length and a few photos of the lot.

Part of a designed system. Shotcrete on a slope is one part of a system. Your geotechnical engineer decides what the slope needs, for example shotcrete facing, soil nails, anchors or drainage, and specifies the details.
Reference guidance. The U.S. Federal Highway Administration's Geotechnical Engineering Circular No. 7, Soil Nail Walls Reference Manual (FHWA-NHI-14-007, 2015), describes top-down construction. The ground is dug out in lifts, soil nails and an initial shotcrete facing go in at each lift, and a final facing is added afterwards.
Know its limits. GEC 7 is U.S. highway guidance, not a Canadian code. It covers permanent soil nail walls and does not specifically address temporary soil nail support or landslide stabilization. Your engineer decides which standards apply to your slope.
Shotcrete practice. For the shotcrete itself, ACI PRC-506-22, Shotcrete—Guide, covers materials, equipment, application and crew responsibilities.
Who decides. Your geotechnical engineer sets the design, and the authority having jurisdiction approves it. Enviro Shield places the shotcrete to the approved drawings and specifications.