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7.0 EXCAVATION OPERATIONS REQUIREMENTS <br /> 7.1 PRELIMINARY REQUIRFAlENTS <br /> Certain government agencies (e.g. California) require a permit to perform excavation <br /> operations. <br /> Before digging, the tank removal subcontractor will determine if underground utilities such <br /> as sewer, water, fuel, AM tower radials or electrical lines will be encountered, and if so, <br /> determine the exact locations of the lines. Information can be obtained by contacting an <br /> underground utility location service (consult local telephone directory for toll-free numbers), <br /> local utility companies, and the owner of the property on which excavating operations are <br /> planned. <br /> Trees, boulders, and other surface encumbrances, located so as to pose a potential hazard <br /> to employees must be removed or made safe before the operation begins. <br /> 7.2 PLACEMENT OF EXCAVATED MATERIALS <br /> Excavated materials will be placed at least two feet back from the edge of the excavation and <br /> precautions will be taken to prevent the materials from falling back into the excavation. <br /> 7.3 WORKING IN EXCAVATIONS <br /> 7.3.1 Shoring and Sloping <br /> Trenches in which personnel are required to work must be shored or sloped if the <br /> depth of the excavation is five (5) feet or more. When a shoring system is used, it shall <br /> consist of hydraulic shores or the equivalent, with sheathing or sheet piling as needed. <br /> Trench boxes are also permitted. OSHA uses a soil classification system to determine the <br /> allowable slopes for trenches. The shoring system must be properly designed and installed <br /> 80300000 HAMALTH�FNLHSP APni 21. 1993 <br /> FEMA USTc Fuel Gcouic HSP 22 <br />