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MojpQ- a method of excavation whereby the faces of an excavation or trench are laid <br /> back to provide protection from moving ground. <br /> >'o.- the earth material that is removed in the formation of an excavation. <br /> - the horizontal members of the shoring system whose sides bear against the <br /> uprights. Stringers are sometimes called whalers. <br /> Mal- a structural member designed to resist forces, either tensional or compressional. <br /> Trench - an excavation made below the surface of the ground. In general, the depth is <br /> greater that the width at the bottom, but the width of a trench at the bottom is not greater <br /> than 15 feet. <br /> Trench Shield - a protective device which shields workers from the effect of ground <br /> movement and which can be moved along as work progresses. <br /> s - the vertical members of the shoring system. <br /> Whaler - a structural member in a horizontal or nearly horizontal position used for <br /> stiffening or securing other components of concrete forms, excavation sheeting,or similar <br /> temporary structures. <br /> EXCAVATION PROCEDURES <br /> (also trenches, shafts, and other earthwork) <br /> 1. Prior to beginning an excavation, the location of all underground utilities and other <br /> underground hazards shall be determined. <br /> 2. A hazard assessment shall be conducted by a qualified person to evaluate the <br /> potential exposure to employees who may work in or around the excavation. <br /> 3. The excavation shall also be inspected by a qualified person after each rain or <br /> other hazard-increasing event to evaluate the potential hazards from slides or cave- <br /> ins. <br /> 4. Anytime an employee enters an excavation 5 feet or greater in depth, that <br /> employee must be protected by a system of shoring, sloping, benching, or <br /> alternative means addressed in *15 below. <br /> S. The conditions in *4 above, will also require Groundwater Technology to obtain <br /> the necessary excavation permit and/or notification procedures with Cal-OSHA. <br /> EX&TRNCH.POL/MG #F2 <br />