Don't get me wrong, I am outraged; just not sure what we are trying to achieve. If yu employ the homeless - that's great in a way - but make sure they know what they are doing; this is dangerous chemcals, not soup.
I would prefer unemployed rather than homeless. I am not calloused some homeless are homeless because of unemployment. However, we would be extremely naive to think that all homeless are there due to unemployment. Some are homeless because of their own volition and bad choices they made in life. I will also not deny that once homeless, it is very difficult to get out of that rut, especially with the stigma society has attached to the homeless.
OTOH would I want a homeless individual working in a chemical plant where safety to the consumer is the primary interest? I would have to say no even if the individual was a chemist. What is he doing on the street? Without further investigation into the individuals background, he would not be hired, and should he proved credible, would have to prove without a shadow of a doubt he could function in my operation. If hired, he/she would be under the normal probational period and closely monitored. Moving up the chain would be commensurate with having gained trust in the individual. Business is business!