. >> reporter: corey woodruff works at the facility and would have been working right where the fire but just happened to have the day off. >> the refining industry everything is based around safety. >> reporter: woodruff says accidents happen, but says he's not concerned about his health. he adds employees have strict procedures to follow, permits to obtain for certain jobs, and says the air is being continuously monitored. >> they were pretty safe, right? unless you are in the line of fire as far as the smoke going right on you it wouldn't affect you at all. of course there are a lot of things involved in that smoke, hydrocarbons and other chemicals . not much different from a construction fire. >> reporter: it is expected to provide another report in a few days. contra costa health is working with its own toxicologist to see if there will be long-term health impacts to soil and water. there is also ongoing independent investigation to figure out how the fire started to prevent it from happening again. >>> first alert weather powered by kia. learn more at kia.com. movement that ins