A few years ago, The RAD Group did a significant study related to workplace safety. They found that only 2 in 5 employees felt comfortable reporting unsafe behavior. The observation study also showed that the average employee performs three unsafe acts per week.
The interviewer would like to know that he/she can trust you to report unsafe work or unsavory behavior in the workplace. The oil and gas industry has incredibly stringent safety regulations and Chevron Corporation must make sure that they are hiring someone who honors their commitment to safety.
Talk to the interviewer about the steps you would take if you witnessed unsafe behavior in the field. If you have personally seen some dangerous behavior, discuss the specifics.