So, the petroleum industry is fighting disclosure because they’re afraid that they will have to tell us about all of the harmless grocery store products they use?
I call shenanigans
One driller does not want to give away proprietary information to another driller.
They aren’t all harmless, but they’re common. You don’t want soap or antifreeze in your drinking water. But the point of fracking is that you put the chemicals down multiple layers of cemented steel pipe into oil and gas zones, not freshwater zones, that are located thousands of feet beneath freshwater.
Disposal of recovered fluids can be a problem, but no more so than from any other industrial facility that is required to treat water for discharge. Options include deep well injection (which in some areas may cause mini-quakes), re-injection for fracking, or processing to remove contaminants. The water cannot be discharged into rivers and streams without cleaning nor disposed in above-ground pits where seepage may contaminate freshwater. Here in the SW oil patch most frac water is injected into the same wells used for disposal of brine water from oil production wells. The latter has been ongoing since the 1950’s with no problems with mini-quakes.