Liberty Lake Portal Building
23403 E Mission Ave
Mica Peak Room #209
Liberty Lake, WA 99019
OSHA standards for trenching and excavation require that every jobsite have a “competent person” present at all times, who has knowledge of the OSHA standard and adequate field experience. Class Instruction Topics include: General Requirements, Soil Classification Methods, Tabulated Data, Site Evaluation, Shoring requirements and equipment