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SECTION 5 <br /> 5-1 TRENCH AND EXCAVATION SAFETY PROTECTION SYSTEM.--Attention <br /> is directed to Section 5-1.02A, "Trench Excavation Safety Plans", <br /> of the Standard Specifications , to the provisions of Section 6707 <br /> of the Labor Code of the State of California and these special <br /> provisions . <br /> The walls and faces of all excavations and trenches 5 feet <br /> or more in depth in which employees shall enter shall be effec- <br /> tively guarded by a shoring system, sloping of the ground, or <br /> other equivalent means. Excavations and trenches less than 5 <br /> feet in depth shall also be so guarded when examinations indicate <br /> hazardous ground movement may be expected. <br /> III 5-1 <br />