This dataset presents analytical results for laboratory and field tests conducted during 2015–19 as part of a bioremediation study in the wetland study area at Standard Chlorine of Delaware, Inc. Superfund site. Included in the dataset are (1) volatile organic compound and metal concentrations from field sampling in the wetland area, (2) results from in situ microcosms in the reactive barriers and control areas, and (3) volatile organic compound concentrations from laboratory experiments to test reactive mixtures for a barrier.

This metadata record contains 15 tables with results from field and laboratory tests used to assess bioremediation in wetland areas at the Standard Chlorine of Delaware, Inc. Superfund site, New Castle County, Delaware, during 2019-2021. Included in the dataset are (1) polychlorinated biphenyl (PCB) concentrations in wetland sediment from sediment microcosm laboratory experiments, (2) chlorobenzene concentrations in wetland sediment from sediment microcosm laboratory experiments, (3) polychlorinated biphenyl concentrations from PCB microcosm laboratory experiments using polyethylene strips, (4) chlorobenzene concentrations from PCB microcosm laboratory experiments using polyethylene strips, (5) total iron and ferrous iron concentrations from compost microcosm laboratory experiments, (6) methane (aqueous phase) concentrations from compost microcosm laboratory experiments, (7) volatile organic compound concentrations from compost microcosm laboratory experiments, (8) methane concentrations from polyethylene passive diffusion bag samplers collected during field sampling in the wetland area, (9) volatile organic compound concentrations from polyethylene passive diffusion bag samplers from field sampling, (10) chlorobenzene concentrations in water from field sampling using low density polyethylene sheet passive samplers, (11) polychlorinated biphenyl concentrations in water from field sampling using low density polyethylene sheet passive samplers in the wetland study area, (12) volatile organic compound concentrations for water samples collected from compost microcosm experiments with and without granular activated carbon, (13) volatile organic compound concentrations in sediment, extracted from methanol aliquots collected from compost microcosm experiments with and without granular activated carbon, (14) total iron concentrations for samples collected from compost microcosm experiments with and without granular activated carbon, and (15) methane (aqueous phase) concentrations for samples collected from compost microcosm experiments with and without granular activated carbon.

This metadata record contains 15 tables with results from field and laboratory tests used to assess bioremediation in wetland areas at the Standard Chlorine of Delaware, Inc. Superfund site, New Castle County, Delaware, during 2019-2021. Included in the dataset are (1) polychlorinated biphenyl (PCB) concentrations in wetland sediment from sediment microcosm laboratory experiments, (2) chlorobenzene concentrations in wetland sediment from sediment microcosm laboratory experiments, (3) polychlorinated biphenyl concentrations from PCB microcosm laboratory experiments using polyethylene strips, (4) chlorobenzene concentrations from PCB microcosm laboratory experiments using polyethylene strips, (5) total iron and ferrous iron concentrations from compost microcosm laboratory experiments, (6) methane (aqueous phase) concentrations from compost microcosm laboratory experiments, (7) volatile organic compound concentrations from compost microcosm laboratory experiments, (8) methane concentrations from polyethylene passive diffusion bag samplers collected during field sampling in the wetland area, (9) volatile organic compound concentrations from polyethylene passive diffusion bag samplers from field sampling, (10) chlorobenzene concentrations in water from field sampling using low density polyethylene sheet passive samplers, (11) polychlorinated biphenyl concentrations in water from field sampling using low density polyethylene sheet passive samplers in the wetland study area, (12) volatile organic compound concentrations for water samples collected from compost microcosm experiments with and without granular activated carbon, (13) volatile organic compound concentrations in sediment, extracted from methanol aliquots collected from compost microcosm experiments with and without granular activated carbon, (14) total iron concentrations for samples collected from compost microcosm experiments with and without granular activated carbon, and (15) methane (aqueous phase) concentrations for samples collected from compost microcosm experiments with and without granular activated carbon.

This metadata record contains 14 tables of biogeochemical data collected to evaluate the fate and transport of chlorinated ethenes in Area B groundwater, Fort Detrick, Frederick, Maryland collected during 2018-2020. Included in the dataset are (1) FtD_All_Constituents_NA_2019: concentrations of all non-VOC constituents analyzed as part of the natural attenuation sampling event in 2019, (2) FtD_All_Constituents_NA_2020: concentrations of all non-VOC constituents analyzed as part of the natural attenuation sampling event in 2020, (3) FtD_All_Constituents_PW_2019: concentrations of all non-VOC constituents analyzed as part of the porewater-surface water sampling event in 2019, (4) FtD_All_Constituents_PW_2020: concentrations of all non-VOC constituents analyzed as part of the porewater-surface water sampling event in 2020, (5) FtD_Concentrations_in_Rock_Matrix_VOC_2020: calculated concentrations of VOCs detected in rock matrix cores, extracted in 2020, (6) FtD_ISM_QuantArray_2020: abundance of microbial communities analyzed as part of the in situ microcosm event in 2020, (7) FtD_ISM_VOC_2020: concentrations of VOCs from the in situ microcosm event in 2020, (8) FtD_ISM_Redox_2020: concentrations of oxidation-reduction (redox) constituents from the in situ microcosm event in 2020, (9) FtD_MeOH_Extract_VOC_2020: concentrations of VOCs in methanol extracts of rock cores, extracted in 2020, (10) FtD_NA_VOC_2019: concentrations of VOCs analyzed as part of the natural attenuation sampling event in 2019, (11) FtD_NA_VOC_2020: concentrations of VOCs analyzed as part of the natural attenuation sampling event in 2020, (12) FtD_PW_VOC_2019: concentrations of VOCs analyzed as part of the porewater-surface water sampling event in 2019, (13) FtD_PW_VOC_2020: concentrations of VOCs analyzed as part of the porewater-surface water sampling event in 2020, and (14) FtD_USGS_Laboratory_evaluation_samples_VOC_2020: concentrations of VOCs analyzed as part of laboratory comparison in 2020.

This dataset presents the results of 475 unique organic compounds collected from 54 wadeable streams within the Southeastern, USA, collected within 10 weeks during 2014. Maximum and median exposure conditions were evaluated in relation to watershed characteristics and for potential biological effects. This dataset contains the summary statistics (maximum and median concentrations)of detected compounds, as well as a summary of quality-assurance (blanks and replicates) samples. Also included are the statistical summaries as related to analyte specific contaminant detection/concentration data and site-specific land-use matrices, spearman-rank correlations, and ToxCast evaluations.

This dataset presents the results of 475 unique organic compounds collected from 54 wadeable streams within the Southeastern, USA, collected within 10 weeks during 2014. Maximum and median exposure conditions were evaluated in relation to watershed characteristics and for potential biological effects. This dataset contains the summary statistics (maximum and median concentrations)of detected compounds, as well as a summary of quality-assurance (blanks and replicates) samples. Also included are the statistical summaries as related to analyte specific contaminant detection/concentration data and site-specific land-use matrices, spearman-rank correlations, and ToxCast evaluations.

Human-use pharmaceutical, pesticide, and wastewater indicator compounds were analyzed at the U.S. Geological Survey, National Water Quality Laboratory, Denver, Colorado, in wadeable streams in 4 Regional Stream Quality Assessments: Northeast (NESQA), Southeast (SESQA), Pacific Northwest (PNSQA) and California (CSQA). Multiple (with few exceptions) samplings occurred at each site, during base flow, between 2014 and 2017. Sites were located in the headwaters of perennial, wadeable streams in urban and agricultural watersheds. Site selection and methodology for each assessment can be found in Van Meter and others (2015), Sheibley and others (2015), Van Meter and others (2017), Coles and others (2016), Van Meter and others (2016), Journey and others (2015), and Van Meter and others (2014). Additional results for this study can be found in Bradley and others, 2020 and Mahler and others, 2020. See cross-reference section for full citation information.

Human-use pharmaceutical, pesticide, and wastewater indicator compounds were analyzed at the U.S. Geological Survey, National Water Quality Laboratory, Denver, Colorado, in wadeable streams in 4 Regional Stream Quality Assessments: Northeast (NESQA), Southeast (SESQA), Pacific Northwest (PNSQA) and California (CSQA). Multiple (with few exceptions) samplings occurred at each site, during base flow, between 2014 and 2017. Sites were located in the headwaters of perennial, wadeable streams in urban and agricultural watersheds. Site selection and methodology for each assessment can be found in Van Meter and others (2015), Sheibley and others (2015), Van Meter and others (2017), Coles and others (2016), Van Meter and others (2016), Journey and others (2015), and Van Meter and others (2014). Additional results for this study can be found in Bradley and others, 2020 and Mahler and others, 2020. See cross-reference section for full citation information.

The Garland Creosoting Superfund Site in Longview, Texas is an abandoned wood treatment facility that used creosote to preserve wood products between 1960 and 1997. Previous remediation activities at the contaminated site included excavation of creosote-contaminated soil and the installation of an interceptor collector trench and groundwater treatment system to prevent the movement of contaminated groundwater into an intermittent stream, hereinafter referred to as the "unnamed tributary". The unnamed tributary drains into the Iron Bridge Creek after flowing along the southern boundary of the Garland Creosoting Superfund Site, and Iron Bridge Creek eventually drains into the Sabine River, a source of drinking water for thousands of Texas residents. The U.S. Environmental Protection Agency (EPA) is concerned with potential risks to human health from contaminated groundwater that may be flowing off-site either beneath or within the unnamed tributary. To evaluate the status of volatile organic compound (VOC) and semivolatile organic compound (SVOC) contamination, in November 2023 and January 2024, the U.S. Geological Survey (USGS), in the cooperation with the EPA, collected paired surface water and porewater samples from sampling locations along an unnamed tributary, and groundwater samples from monitoring wells at the Garland Creosoting Site. In total, nine paired porewater and surface water samples (along with one additional surface water sample) were collected from the unnamed tributary. Groundwater-quality samples were collected from five monitoring wells at the Site.

The Garland Creosoting Superfund Site in Longview, Texas is an abandoned wood treatment facility that used creosote to preserve wood products between 1960 and 1997. Previous remediation activities at the contaminated site included excavation of creosote-contaminated soil and the installation of an interceptor collector trench and groundwater treatment system to prevent the movement of contaminated groundwater into an intermittent stream, hereinafter referred to as the "unnamed tributary". The unnamed tributary drains into the Iron Bridge Creek after flowing along the southern boundary of the Garland Creosoting Superfund Site, and Iron Bridge Creek eventually drains into the Sabine River, a source of drinking water for thousands of Texas residents. The U.S. Environmental Protection Agency (EPA) is concerned with potential risks to human health from contaminated groundwater that may be flowing off-site either beneath or within the unnamed tributary. To evaluate the status of volatile organic compound (VOC) and semivolatile organic compound (SVOC) contamination, in November 2023 and January 2024, the U.S. Geological Survey (USGS), in the cooperation with the EPA, collected paired surface water and porewater samples from sampling locations along an unnamed tributary, and groundwater samples from monitoring wells at the Garland Creosoting Site. In total, nine paired porewater and surface water samples (along with one additional surface water sample) were collected from the unnamed tributary. Groundwater-quality samples were collected from five monitoring wells at the Site.