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r � �r � � �t��-s �',� � + u .�'. » I � N Inti 's � ! .�• N � ; <br /> i <br /> shift, or as often as necessary to ensure safety, a competent <br /> person shall conduct an area survey to locate potential hazards <br /> and determine appropriate safety control measures. <br /> 4.9.4.2 Excavation Safety Procedures <br /> If excavation of contaminated soil to a depth greater than five <br /> feet occurs and entry by workers is needed, then safety <br /> precautions must be adhered to as specified in OSHA regulations <br /> 29 CFR 1926.650. The Supervisor shall question the real need to <br /> enter a trench greater than three feet deep. Remote sampling <br /> and/or excavation equipment should be used where possible. As a <br /> minimum, the following rules shall be strictly observed: <br /> Excavations into which employees may be required to <br /> descend shall be sloped (1-to-1) , benched, or shored, <br /> if they are more than five feet in depth. <br /> Excavation spoils shall be placed no closer to the edge <br /> of the excavation than one excavation depth away. <br /> No employee will work adjacent to any excavation until <br /> a reasonable examination of same has been made to <br /> r determine that no conditions exist exposing them to <br /> injury from moving ground. <br /> Trees, boulders, overhead lines or cables, and other <br /> surface encumbrances located so as to create a hazard <br /> to employees involved in excavation or in the vicinity <br /> thereof at any time during operations will be removed <br /> or made safe before excavating is begun. <br /> Excavations shall be inspected by an IT-qualified <br /> person after every rainstorm or other hazard-increasing <br /> occurrence, and the protection against slides and cave- <br /> ins will be increased if necessary. <br /> Appropriate access methods, such as ladders, shall be <br /> used to enter or exit the excavation. Under no <br /> circumstances is it permitted to ride backhoe buckets, <br /> 4-26 <br />