Abstract: At approximately 08:00 a.m. on April 9, 2012, Employee #1, a 32-year-old male with Wolfe Roofing was cleaning roof surface with air blower. Employee #1 then fell through the roof, from approximately ten-feet to the concrete floor below. Employee #1 was transported to Northridge Hospital and was treated for two weeks for unspecified contusion injuries. Employee had been working for company for ten-years and the Employer was a roofing contractor. At the time of the incident, Employee #1 was performing his daily duties and was working with company's other employees and on site supervisor. Interviews were conducted with the supervisor, Employee #1 and coworkers. The investigation concluded that violation of CCR Title 8 Sec:1730(a) was the cause of this incident. The employee was commencing roofing operations, without being trained and instructed in the hazards and methods of roofing operations. As a result, the Division issued citation to the employer according to CCR Title 8 Sec:1730(a).