- All excavated materials, spoils, loose dirt, stones, tools, etc. must be kept back at least 2 ft. from the edge of an excavation or adequate retaining shields or blocking devices must be used to ensure that materials cannot fall onto employees in the excavation.
- Type-C soils must be sloped to an incline of at least 1:1; that is, for every 1 ft. depth you must have top of slope back 1 ft. from toe of slope or 1 ft. horizontal for every 1 ft. vertical.
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