You mentioning the EPA reminds me of a true story. I have had my 1969 Barracuda Fastback for about 34 years now. I bought it while I was still in the Air Force stationed at Little Rock AFB in Arkansas. There was an excellent machine shop about ten miles north of the base. I took the 340 to them for machine work. They were off the main road, and there shop was only a few yards from a decent sized stream. They used to hang the blocks on a cherry picker, wheel it out practically to the stream bank and steam clean the grease and oil off of it right into the stream. I wonder if the EPA ever found out. This would have been about 1992.
I got one similar. About 1995, I was working at a Ford dealership in Forsyth, just a little up the road from us. The service department was about a mile or so down the road from the main dealership.
Like your situation, there was some woods with a stream running behind the shop. Like many shops, there was an iron grate for drainage running down the middle of the shop, from the front roll up door to the rear one.
One day, I found a dead hummingbird in the shop. Not just a hummingbird. A Ruby Throated hummingbird. So time rocked on. Over the next few weeks, we continued to find multitudes of dead hummingbirds. Now this dealership was still very new to the area. In fact, Kirk and I were the only two techs they had and the first two to occupy this particular shop in probably five or six years. But the building We were in was several decades old.
We KNEW how to safely drain and dispose of fluids and were doing just that with the oil and antifreeze bulk containers in the shop. We never once used the grate in the floor to drain anything........but the businesses before us was another thing altogether.
Now Forsyth AIN'T the place to be breakin any laws. It's a home base for the Georgia State Patrol, plus has a training compound for every branch of LEOs in the state. I think last I counted there's NINE branches of law enforcement in Forsyth. You really gotta be some kinda stupid to be a criminal in Forsyth, and they got plenty of um.
Anyway, one mornin bright and early Kirk and I get there and there's an officer chick from the DNR there nosin around outside the shop. She starts askin us about the dead birds. I tell her "yeah, they're ruby throated hummingbirds". Shes says "I know, but how did you know?" I tell her Daddy was an avid birdwatcher when I was a kid and a lot of it wore off on me.
This is when she tells us the exciting news. Ruby throated hummingbirds are federally protected. Next thing we know, there's like four cars worth of DNR folks there shuttin the service department down. We got a 10 day vacation.....and the dealership was required to keep paying us.
So they did an investigation and find out that the pollution is not from the active present service department, but a gas station up the road whose drainage was getting into a runoff culvert that was connected to OUR shop drain system. That business got closed. For good. So don't MESS with ruby throated hummingbirds.