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Plumbing License - CPCPDR4011B - Design & size sanitary drainage systems

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Uploaded on Oct 16, 2011From, this video covers some of the hazards workers can be exposed to when working in trenching or excavating operations as well as precautions to take that will help ensure a safe working environment. Topics covered include soil conditions, proper sloping, shoring and shielding systems, atmospheric hazards, underground utilities, water accumulation, and access & egress

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