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Across 3. If it is necessary to work without shoring, operations should be conducted with extreme caution, under direct supervision, and after obtaining a survival profile of the _____. 5. All other personnel should remain in a _____ Area outside the Hazard Zone. 7. The Safety Officer is responsible for digging operations and for the _____ of shoring. 9. The ____ and effective management of these operations requires special considerations. 11. A _____ Zone should be established to control at least 50 feet around the perimeter of the cave in area. 12. Due to the exhausting nature of trench rescue work the Extrication Sector must be prepared to rotate personnel at the first sign of _____. 13. The Safety Officer must keep in mind the safety of the _____ and the need to take action very deliberately. 14. Trench rescue operations present a significant _____ to fire department personnel

Down 1. The temporary _____ at any point in an operation may be disturbed by removing soil or debris, by adding weight near the edge of an open cut, by vibration (such as vehicle movement), rain, or simply by the passage of time. 2. Cave ins and collapses generally occur because of unstable soil conditions combined with improper and/or inadequate _____. 3. _____ should not approach within 50 feet of the open trench during rescue operations. 4. The potential for additional _____ must always be considered as a primary hazard and personnel must be aware that any action may disturb the temporary stability and cause an additional collapse. 6. The Extrication Sector Officer must maintain a constant awareness of the position and function of all personnel directly involved in the _____ effort. 8. All traffic should be stopped or rerouted for at least 300 feet around the excavation to minimize _____. 10. _____ to provide access into and out of the trench should be placed on both sides, at not more than 6 foot intervals.