Showing 1 - 20 results of 22 for search '"Environmental Protection Agency"', query time: 0.12s Refine Results
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    Groundwaters in Northeastern Pennsylvania near intense hydraulic fracturing activities exhibit few organic chemical impacts by Xiong, Boya, Soriano, Mario A., Gutchess, Kristina M., Hoffman, Nicholas, Clark, Cassandra J., Siegel, Helen G., De Vera, Glen Andrew D, Li, Yunpo, Brenneis, Rebecca J., Cox, Austin J., Ryan, Emma C., Sumner, Andrew J., Deziel, Nicole C., Saiers, James E., Plata, Desiree L.

    Published 2022
    “…All analyzed volatile and semi-volatile compounds were below recommended United States Environmental Protection Agency maximum contaminant levels, and integrated concentrations across two volatility ranges, gasoline range organic compounds (GRO) and diesel range organic compounds (DRO), were low (0.13 ± 0.06 to 2.2 ± 0.7 ppb and 5.2–101.6 ppb, respectively). …”
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  13. 13

    Assessing Unconventional Oil and Gas Exposure in the Appalachian Basin: Comparison of Exposure Surrogates and Residential Drinking Water Measurements by Clark, Cassandra J, Xiong, Boya, Soriano, Mario A, Gutchess, Kristina, Siegel, Helen G, Ryan, Emma C, Johnson, Nicholaus P, Cassell, Kelsie, Elliott, Elise G, Li, Yunpo, Cox, Austin J, Bugher, Nicolette, Glist, Lukas, Brenneis, Rebecca J, Sorrentino, Keli M, Plano, Julie, Ma, Xiaomei, Warren, Joshua L, Plata, Desiree L, Saiers, James E, Deziel, Nicole C

    Published 2023
    “…Twenty-seven chemicals were detected in ≥20% of water samples at concentrations generally below U.S. Environmental Protection Agency standards. In Pennsylvania, two organic chemicals/groups had reduced odds of detection with increasing distance to the nearest well: 1,2-dichloroethene and benzene (Odds Ratio [OR]: 0.46, 95% confidence interval [CI]: 0.23-0.93) and m- and p-xylene (OR: 0.28, 95% CI: 0.10-0.80); results were consistent across metrics. …”
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    How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks by Val Martin, M., Lamarque, Jean-Francois, Tilmes, S., Emmons, L. K., Schichtel, B. A., Heald, Colette L.

    Published 2015
    “…Under the RCP4.5 scenario, surface O[subscript 3] is substantially reduced (about 5 ppb), with daily maximum 8 h averages below the primary US Environmental Protection Agency (EPA) National Ambient Air Quality Standards (NAAQS) of 75 ppb (and even 65 ppb) in all the NPs. …”
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