"...A subsequent investigation by PFBC law enforcement officers and DEP determined that the contaminate material was Airfoam HB, a chemical wetting agent, and that the source was a PGE Marcellus gas well site situated above the spring discharge, on the mountainside approximately 2,000 feet away. ...

PFBC investigators determined that the surfactant was pumped down the well during the drilling process and, in all probability, accumulated in a void in the sedimentary rock layers. The surfactant was then flushed laterally through the underground rock strata by heavy rain runoff before emerging as a soapy discharge at the spring. ..."

http://www.strausnews.com/articles/2011/03/25/pike_county_courier/n...