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Daniel J. Gefell

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Chemicals of Emerging Concern in Water and Bottom Sediment in Great Lakes Areas of Concern, 2013—Analytical Methods, Collection Methods, Environmental Data, and Quality Assurance
The U.S. Geological Survey (USGS), in cooperation with the U.S. Fish and Wildlife Service (USFWS) and the U.S. Environmental Protection Agency (EPA), identified the occurrence of contaminants of emerging concern (CECs) in water and bottom sediment collected in 2013 at 57 sites throughout the Great Lakes Basin. The 2013 effort is part of a long-term study that began in 2010. Included in this directory are references to or descriptions of analytical methods used, collection methods, environmental data, and associated quality-assurance data for samples collected in 2013. Samples were collected from April through October 2013 by USGS, USFWS, and/or EPA personnel. Study sites include tributaries to the Great Lakes...
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Chemicals of Emerging Concern in Water and Bottom Sediment in the Great Lakes Basin, 2014 - Analytical Methods, Collection Methods,Quality-Assurance Analyses, and Data
The U.S. Geological Survey (USGS), in cooperation with the U.S. Fish and Wildlife Service (USFWS) and St. Cloud State University (SCSU), identified the occurrence of chemicals of emerging concern (CECs) in water and bottom sediment collected in 2014 at 65 sites throughout the Great Lakes Basin. The 2014 effort is part of a long-term study that began in 2010. Included in this directory are collection methods, references to or descriptions of analytical methods used, data for samples collected in 2014, and associated quality-assurance data. Samples were collected during the periods of April to May and August to September by USGS, USFWS, and (or) SCSU personnel. Study sites include tributaries to the Great Lakes located...
Several quality-control measures were implemented both in the field and at the laboratory to evaluate the integrity of the data being generated. Sample replicates and blank samples were collected in the field. Surrogate standards, isotope dilution standards, matrix spikes, reagent blank-water spikes, and reagent blank-sediment samples were prepared in the laboratory. Quality control measures used in 2013 were similar to those used in previous years of the study. Detailed descriptions and how the quality-assurance data are used can be found in Lee and others (2012) for data collected in 2010-11 and in Lee and others (2015) for data collected in 2012 for the same study. References: Lee, K.E., Langer,...
Categories: Data
This directory provides analytical results for wastewater compounds, steroid hormones, sterols, and bisphenol A, and pharmaceuticals in water and wastewater compounds, steroid hormones, sterols, and bisphenol A, pharmaceuticals, and antidepressants in bottom-sediment samples collected during 2013. In addition, a comparison of data obtained for compounds determined by pharmaceutical methods 8244 and 2440 is provided. Data provided are as reported by the laboratory, unless otherwise noted, and listed by sample. "2013Data_by_Result.xlsx" provides all environmental data included in "2013WaterData" and "2013SedimentData", listed by compound. Discussion of number of detections does not include results that were 'v' or...
Categories: Data
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Several quality-control measures were implemented in the field and at the Environmental Sampling Technologies Laboratory and the U.S. Geological Survey National Water Quality Laboratory to evaluate the integrity of the data being generated. Sample replicates and blank samples were collected in the field. Surrogate standards, isotope dilution standards, matrix spikes, reagent blank-water spikes, reagent blank-sand samples, polar organic chemical integrative sampler (POCIS) method blank samples, and POCIS method spikes were prepared in the laboratory. Quality-control measures used in 2014 were similar to those used in previous years of the study. Detailed descriptions and how the quality-control data are used can...
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