A person buried under only a couple of feet of soil can experience enough pressure to the chest to prevent the lungs from expanding and cause suffocation. Heavier soil and boulders can crush us in an instant. Of course, we must remember that the average cave-in can drop five yards of soil or more. That's 13,500 pounds of dirt! How quickly can your co-workers dig through five or more yards of dirt to find you? Survival is unlikely. REMEMBER: WHILE WORKING IN TRENCHES AND EXCAVATIONS, THERE IS ABSOLUTELY NO ROOM FOR RISK-TAKING. ANY CONDITION YOU IGNORE OR OVERLOOK CAN BE FATAL! Topics included in this safety video are competent person, inspections, soil classification, and manual testing.