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Mysterious odor evacuations

Shown is a command center as officials search for the cause of an odor that instigated the neighborhood's voluntary evacuation, Monday, July 14, 2014, in Skippack, Pa. Residents of 150 suburban Philadelphia homes are being allowed to return as their houses are tested after a voluntary evacuation overnight due to a mysterious odor. Officials are awaiting lab results to try to identify the substance responsible for Sunday evening’s problem in the neighborhood in Skippack. (AP Photo/Matt Rourke)

Mysterious odor evacuations

Yahoo NewsJuly 14, 2014

Residents of 150 suburban Philadelphia homes are being allowed to return home as their houses are tested after a voluntary evacuation overnight due to a mysterious odor.

Officials are awaiting lab results to try to identify the substance responsible for Sunday evening's problem in the neighborhood in Skippack. Officials have identified basement sump pumps as the origin but have not been able to pinpoint the cause.

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