Abstract: At approximately 11:09 a.m. on November 17, 2008, Employee #1 was working as a concrete laborer at a street walkway in Chino Hills, CA. He was a regular employee of his employer. His employer was installing an underground conduit for low-voltage communication lines. Employee #1 was breaking a concrete slab walkway with an APT Model Number 180 pneumatic jackhammer when a 2-foot-long bit broke. The bit shank struck the work boot on his left foot, piercing the boot and causing a serious crushing injury to his foot. He was taken to the Loma Linda University Medical Center in Loma Linda, California, for treatment. Surgery was performed, and he was hospitalized for two days.