Is it against the law to work in an environment with hazardous chemicals alone during the grave yard shift?

Question Details:

I just wanted to know if I have a valid case going for me and If I should go ahead and seek legal advice from an employment lawyer? First, I have been working alone by myself in a semiconductor industry for the past 3-4 years. I work 12 hours and usually work alone for most of my shift during graveyard. I also handle very hazardous chemicals without a valid certification. I could have been seriously injured on the job due to a chemical spill or leak and since I work alone in my department, I would have no one to contact or help should I have passed out unconscious. In Alameda County, CA. Important Notice