RALEIGH, N.C. (AP) — State officials say Duke Energy has plugged a second pipe running under a huge coal ash dump that was leaking arsenic-laced groundwater into the Dan River, which is already polluted from a massive Feb. 2 spill.

The state Department of Environment and Natural Resources said Friday the contamination from the pipe at Duke’s Eden plant was fully contained, four days after the company was ordered to plug it. Water coming from the pipe contains arsenic at levels 14 times more than considered safe for human contact.