It happened last night, before the evening meal and before the briefing by the Scholars Jolienne and Imas. The experimental refinement unit in Snaketail Grotto has suffered a stress fracture in its base. The foundation split, causing a large amount of waste to spill into the underground lake beneath. This lake feeds right into the Snaketail River. I don't believe there is any cause for concern, but I shall keep informed of any developments.