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Pittsburgh metropolitan area / Bucks County / Pennsylvania / Marcellus Formation / Washington County / Pennsylvania / Shale gas / Delaware River / Allegheny County / Pennsylvania / Pennsylvania Department of Environmental Protection / Riverkeeper / Geography of Pennsylvania / Geography of the United States / United States


Microsoft Word - J-127A-D-2012oajc[1]
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Document Date: 2013-12-21 09:19:36

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File Size: 740,56 KB

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