I mean the a public school employees dozens to hundreds of people with degrees in education and specialty fields. Why do they need to outsource their curriculum?
1) a problem with the pipe further up near the surface. When you have an oil well (even a regular old one) you get all sorts of stuff that comes up water, the gases we call "natural gas", nasty deadly gases and "oil".
2) some other source of contamination completely unrelated to drilling which given their measurement of the concentration at parts per trillion seems likely..
Even if the problem is the first one I imagine there would be nastier compounds I would be more worried about.