Abstract: On June 12, 2012, Employee #1, of Harber Co., Inc., North Las Vegas, NV, was operating a jackhammer at a construction project for a new WINCO Foods. He was working on the north side of the parking lot. He was lifting the jack hammer when he felt a pain on his left arm. He took a 10-minute break, after which Employee #2, his supervisor, gave him water and asked how he was feeling. Employee #1 asked for a second 10-minute break and went to his truck to rest. At approximately 11:45 a.m., Employee #1 was found lying unresponsive in his truck. His coworkers called 911 and performed CPR until the emergency medical services arrived. Employee #1 was transported to a hospital. He was pronounced dead on arrival. It was determined that he had suffered a heart attack.