Oh boy. 50+ years ago I was going to Merritt College up by the north Oakland city limit, and worked a few hours a week in a Wilshire, then Gulf, station on Telegraph around 53rd. Shortly after I quit for a better job I read that the attendant at another Gulf station down on San Pablo Blvd, also near the north Oakland city limit, was shot to death at night. No bullet proof glass at either. You were supposed to run out, pump the gas unless the owner chose to, wash the windshield, and try to make an oil sale.
But I never had a safety issue, just silly stuff you see in retail. A scammer made $20, confusing a co-worker by swapping bills - four fives for a 20 then 'oops changed my mind' etc. I saw what was happening but didn't get over there soon enough to convince the co-worker to keep the last $20 bill. Of course we were short $20 at closing. Another co-worker was stealing by using trading stamps he stole, for gas purchases on my shift, so my stamps on hand/cash in the till didn't balance. I had to log his purchases and explain to the owner how that scam worked, to show the owner that my cash at the end of the shift was in fact correct. Then I got the explanation that the owner couldn't fire the idiot because his father was a prominent local minister and we would lose business. I decided that working in a factory in west Berkeley that manufactured o-rings was preferable for a college part time job.