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event that work occurs near a trip hazard, such as debris, the area will be clearly cordoned off <br /> with caution tape and all on-site personnel will be made aware of the hazard. <br /> 2.2.7 Excavations and Trenches <br /> Prior to excavating or trenching, a utility clearance of the site will be performed. During this <br /> activity, confined spaces may be created. Although the excavation depths are preset to 4 feet <br /> bgs, it is a possibility that the excavations may be trenched deeper if TPH impacted soil is found <br /> above the action level of 50 ppm at 4 feet bgs. Confined spaces have limited or restricted means <br /> for entry/exit and will generally pertain to trenches/excavations that exceed 4 feet in depth. Tetra <br /> Tech employees and subcontractors will not enter any trench or excavation greater than 4 feet in <br /> depth. All excavations and trenches will be protected before the end of the workday. <br /> 2.2.8 Train Traffic <br /> Tetra Tech will coordinate with the DLA Project Manager, Jim Peck, and the Navy Base prior to <br /> commencing field activities to stop all traffic during the work. In addition, barriers such as <br /> orange cones will be placed 300 feet north and south of the excavations to prevent any unknown <br /> train traffic from entering the area. <br /> 2.3 Activity Hazard Analysis <br /> Table 2-1 lists the activity hazard analysis and specific hazard control procedures, which have <br /> been prepared for each known activity or operation, anticipated at the site. Additional activities <br /> or operations that may be identified, but not included in this analysis will be reviewed on an "as <br /> needed basis"and inserted into this document as an addendum when required. <br /> Rough&Ready Island 8 Tetra Tech,Inc. <br /> Revised Draft HSP November 18, 1998 <br />