Category Archives: Groundwater

More Action By EPA on PFAS; The Bad News Keeps Piling Up.

The news about PFAS keeps piling up, and the trend is pretty clear – none of it is good for manufacturers and significant users.  There were two important items this week.

First, EPA published its human health toxicity assessment for “GenX chemicals,” also known as hexafluoropropylene oxide (“HFPO”) dimer acid (and don’t forget its ammonium salt!).  EPA has pegged HFPO’s toxicity at 7-100 times higher than that of other PFAS compounds for which assessments already exist,… More

The Law Is An Ass, RCRA Edition

Late last month, the 9th Circuit Court of Appeals ruled that a public water supplier could be liable in a citizens’ suit brought under the imminent and substantial endangerment provisions of RCRA, where the plaintiff alleged that the groundwater used by the supplier had been contaminated by the disposal of hexavalent chromium by a wood treatment facility upgradient of the supplier’s well field.

Blaming the victim doesn’t quite cover this. … More

Implementing Maui Remains a Case-by-Case Affair, at Least for Now

Last week, EPA withdrew guidance issued in the waning days of the Trump Administration interpreting the Supreme Court decision in County of Maui v. Hawaii Wildlife FundAs the masochists who follow the torturous case law we call Clean Water Act jurisprudence are well aware, SCOTUS ruled in Maui that discharges from point sources to groundwater that are the “functional equivalent” of a direct discharge to surface water are required to obtain NPDES permits.… More