Poor management. I don't say that as a disgruntled employee either. In my year of work, three managers came and went-one of which was fired for sexual harassment, and stealing from the company. There was little to no accountability for them, which shouldn't be necessary, unless the managers hired are not of great quality.
Compensation is minimum, and benefits are rare.
The Safety Attendant position is definitely the worst, with very little off-time, and unsafe conditions. I would highly recommend reconsidering before accepting that position.