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 Date: 2013-09-08 08:46:13Air pollution United States Environmental Protection Agency Clean Air Act High-altitude platform National Emissions Standards for Hazardous Air Pollutants Risk assessment Benzene Volatile organic compound Hydraulic fracturing Pollution Environment Atmosphere |
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P I T TS B U R GH R E GIO NAL ENVIRONMENTAL THREATS ANALYSIS (PRETA) R E PO RT Preta Air: HAZARDOUS AIR POLLUTANTS