When I started here the first thing they sent me to a mandatory class: 2 hours to say (in different ways) "All the drains outside go directly to the river, so if you see a chemical going towards a drain you are to find the cover near to the drain (a sticker) and block that drain, then call maintenance to figure out what it is".
The above happens several times a year, and you never hear of it because we clean up our own mess. (almost all the mess is the brake line on a delivery truck breaking)
It's useful to remember, though, what the world looked like before climate regulation. Rivers in industrialized cities were once choked with toxic effluent from tanneries and heavy industry. Even in Silicon Valley semiconductor manufacturers dumped heavy metals down the drain, contaminating groundwater and causing many billions of dollars of damage to be cleaned up by the taxpayer.
I do know the EPA fines are a cost of doing business to some. A few of them have decided that the public relations problems were getting too bad and cleaned up their act.
Minimum wage laws, like employer healthcare mandates, are a feudal solution (specifically, viewing employers as feudal lords responsible for the minimal upkeep of their employer-subjects) to a capitalist problem. They are better than nothing, but worse than making minimal upkeep a public function, taxing appropriately to support it, and doing less to impose additional costs or barriers to mutually beneficial employment.
We have already tried the "markets will fix things, markets will regulate themselves" blah blah strategy - it doesn't seem to work. When was the last time a big company voluntarily cleaned up its own oil spill or other environmental disasters?
There has to be minimum wage laws (and environmental laws etc etc) and they have to be sensible. It boggles my mind that you'd argue against this. If you want to encourage small businesses to start, there are other ways to help them - interest free loans, tax free zones etc