That's a major gap, there's no third party oversight, and they have all kinds of incentives to fudge the testing in their favor, including how they collect the samples, what's done in the labs, etc.

If criminal investigative agencies have been caught faking DNA results in criminal cases (SBI lab in NC) because there was a conflict of interest between prosecuting cases and the defendent, you certainly can't trust corporations.

Address your complaints to the Congress. This is not something that is fixable with one weird trick.

Conservatives have gutted enforcement agency regulations and replaced them with corporate self enforcement/self governance. Don't like it? Push for tougher corporate regulation and rewriting the statutes to give power back to the enforcement agencies (that were originally created as a response to events like this happening over and over and over).

The EPA levies millions of dollars in fines against auto shops that do as much as list a few unapproved parts on eBay. They don’t investigate squat.

The idea the EPA needs to follow some vetted and lengthy process with responsible experts is completely false. They have chosen to downplay this on purpose and the actions they are taking are are 100% political.