Gregory C. Delzer, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 35
Volatile organic compound matrix spike recoveries for ground- and surface-water samples, 1997-2001 Volatile organic compound matrix spike recoveries for ground- and surface-water samples, 1997-2001
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program used field matrix spikes (FMSs), field matrix spike replicates (FMSRs), laboratory matrix spikes (LMSs), and laboratory reagent spikes (LRSs), in part, to assess the quality of volatile organic compound (VOC) data from water samples collected and analyzed in more than 50 of the Nation's largest river basins...
Authors
Barbara L. Rowe, Gregory C. Delzer, David A. Bender, John S. Zogorski
Occurrence and temporal variability of methyl tert-butyl ether (MTBE) and other volatile organic compounds in select sources of drinking water : results of the focused survey Occurrence and temporal variability of methyl tert-butyl ether (MTBE) and other volatile organic compounds in select sources of drinking water : results of the focused survey
The large-scale use of the gasoline oxygenate methyl tert-butyl ether (MTBE), and its high solubility, low soil adsorption, and low biodegradability, has resulted in its detection in ground water and surface water in many places throughout the United States. Studies by numerous researchers, as well as many State and local environmental agencies, have discovered high levels of MTBE in...
Authors
Gregory C. Delzer, Tamara Ivahnenko
Chapter A7. Section 7.0. Five-Day Biochemical Oxygen Demand Chapter A7. Section 7.0. Five-Day Biochemical Oxygen Demand
The presence of a sufficient concentration of dissolved oxygen is critical to maintaining the aquatic life and aesthetic quality of streams and lakes. Determinng how organic matter affects the concentration of dissolved oxygen (DO) in a stream or lake is integral to water-quality management. The decay of organic matter in water is measured as biochemical or chemical oxygen demand. This...
Authors
Gregory C. Delzer, Stuart W. McKenzie
Design of a national survey of methyl tert-butyl ether and other volatile organic compounds in drinking water sources Design of a national survey of methyl tert-butyl ether and other volatile organic compounds in drinking water sources
No abstract available.
Authors
Tamara Ivahnenko, S. J. Grady, G.C. Delzer
Study design and analytical results used to evaluate carry-over contamination by volatile organic compounds in surface- and ground-water sampling procedures Study design and analytical results used to evaluate carry-over contamination by volatile organic compounds in surface- and ground-water sampling procedures
No abstract available.
Authors
Brandon L. Taglioli, Gregory C. Delzer, John S. Zogorski
A review of literature for methyl tert-butyl ether (MTBE) in sources of drinking water in the United States A review of literature for methyl tert-butyl ether (MTBE) in sources of drinking water in the United States
No abstract available.
Authors
Gregory C. Delzer, Tamara Ivahnenko
Study design and analytical results used to evaluate stability of volatile organic compounds in water matrices Study design and analytical results used to evaluate stability of volatile organic compounds in water matrices
No abstract available.
Authors
Jason T. Love, G.C. Delzer, Sonja R. Abney, John S. Zogorski
Study design and analytical results used to evaluate a surface-water point sampler for volatile organic compounds Study design and analytical results used to evaluate a surface-water point sampler for volatile organic compounds
No abstract available.
Authors
Michael J. Halde, Gregory C. Delzer, John S. Zogorski
Quality of methyl tert-butyl ether (MTBE) data for ground-water samples collected during 1993-95 as part of the National Water-Quality Assessment Program Quality of methyl tert-butyl ether (MTBE) data for ground-water samples collected during 1993-95 as part of the National Water-Quality Assessment Program
No abstract available.
Authors
Gregory C. Delzer, J. G. Setmire
Occurrence of the gasoline oxygenate MTBE and BTEX compounds in municipal stormwater in the United States, 1991-95 Occurrence of the gasoline oxygenate MTBE and BTEX compounds in municipal stormwater in the United States, 1991-95
The U.S. Geological Survey (USGS) sampled stormwater in 16 cities and metropolitan areas that are required to obtain permits to discharge stormwater from their municipal storm-sewer system into surface water. Concentrations of 62 volatile organic compounds (VOCs), including methyl tert-butyl ether (MTBE) and BTEX (benzene, toluene, ethylbenzene, and total xylene) compounds, were measured...
Authors
G.C. Delzer, J.S. Zogorski, T. J. Lopes
Occurrence of the gasoline oxygenate MTBE and BTEX compounds in urban stormwater in the United States, 1991-95 Occurrence of the gasoline oxygenate MTBE and BTEX compounds in urban stormwater in the United States, 1991-95
Methyl tert-butyl ether (MTBE) is a gasoline oxygenate. Oxygenates such as MTBE, when added to gasoline, increase the gasoline's oxygen level and decrease vehicular carbon monoxide emissions and ozone levels in the atmosphere. MTBE disperses rapidly in water, was the second most frequently detected volatile organic compound (VOC) in a study of shallow urban ground water, and is less...
Authors
Gregory C. Delzer, John S. Zogorski, Thomas J. Lopes, Robin L. Bosshart
Science and Products
Filter Total Items: 35
Volatile organic compound matrix spike recoveries for ground- and surface-water samples, 1997-2001 Volatile organic compound matrix spike recoveries for ground- and surface-water samples, 1997-2001
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program used field matrix spikes (FMSs), field matrix spike replicates (FMSRs), laboratory matrix spikes (LMSs), and laboratory reagent spikes (LRSs), in part, to assess the quality of volatile organic compound (VOC) data from water samples collected and analyzed in more than 50 of the Nation's largest river basins...
Authors
Barbara L. Rowe, Gregory C. Delzer, David A. Bender, John S. Zogorski
Occurrence and temporal variability of methyl tert-butyl ether (MTBE) and other volatile organic compounds in select sources of drinking water : results of the focused survey Occurrence and temporal variability of methyl tert-butyl ether (MTBE) and other volatile organic compounds in select sources of drinking water : results of the focused survey
The large-scale use of the gasoline oxygenate methyl tert-butyl ether (MTBE), and its high solubility, low soil adsorption, and low biodegradability, has resulted in its detection in ground water and surface water in many places throughout the United States. Studies by numerous researchers, as well as many State and local environmental agencies, have discovered high levels of MTBE in...
Authors
Gregory C. Delzer, Tamara Ivahnenko
Chapter A7. Section 7.0. Five-Day Biochemical Oxygen Demand Chapter A7. Section 7.0. Five-Day Biochemical Oxygen Demand
The presence of a sufficient concentration of dissolved oxygen is critical to maintaining the aquatic life and aesthetic quality of streams and lakes. Determinng how organic matter affects the concentration of dissolved oxygen (DO) in a stream or lake is integral to water-quality management. The decay of organic matter in water is measured as biochemical or chemical oxygen demand. This...
Authors
Gregory C. Delzer, Stuart W. McKenzie
Design of a national survey of methyl tert-butyl ether and other volatile organic compounds in drinking water sources Design of a national survey of methyl tert-butyl ether and other volatile organic compounds in drinking water sources
No abstract available.
Authors
Tamara Ivahnenko, S. J. Grady, G.C. Delzer
Study design and analytical results used to evaluate carry-over contamination by volatile organic compounds in surface- and ground-water sampling procedures Study design and analytical results used to evaluate carry-over contamination by volatile organic compounds in surface- and ground-water sampling procedures
No abstract available.
Authors
Brandon L. Taglioli, Gregory C. Delzer, John S. Zogorski
A review of literature for methyl tert-butyl ether (MTBE) in sources of drinking water in the United States A review of literature for methyl tert-butyl ether (MTBE) in sources of drinking water in the United States
No abstract available.
Authors
Gregory C. Delzer, Tamara Ivahnenko
Study design and analytical results used to evaluate stability of volatile organic compounds in water matrices Study design and analytical results used to evaluate stability of volatile organic compounds in water matrices
No abstract available.
Authors
Jason T. Love, G.C. Delzer, Sonja R. Abney, John S. Zogorski
Study design and analytical results used to evaluate a surface-water point sampler for volatile organic compounds Study design and analytical results used to evaluate a surface-water point sampler for volatile organic compounds
No abstract available.
Authors
Michael J. Halde, Gregory C. Delzer, John S. Zogorski
Quality of methyl tert-butyl ether (MTBE) data for ground-water samples collected during 1993-95 as part of the National Water-Quality Assessment Program Quality of methyl tert-butyl ether (MTBE) data for ground-water samples collected during 1993-95 as part of the National Water-Quality Assessment Program
No abstract available.
Authors
Gregory C. Delzer, J. G. Setmire
Occurrence of the gasoline oxygenate MTBE and BTEX compounds in municipal stormwater in the United States, 1991-95 Occurrence of the gasoline oxygenate MTBE and BTEX compounds in municipal stormwater in the United States, 1991-95
The U.S. Geological Survey (USGS) sampled stormwater in 16 cities and metropolitan areas that are required to obtain permits to discharge stormwater from their municipal storm-sewer system into surface water. Concentrations of 62 volatile organic compounds (VOCs), including methyl tert-butyl ether (MTBE) and BTEX (benzene, toluene, ethylbenzene, and total xylene) compounds, were measured...
Authors
G.C. Delzer, J.S. Zogorski, T. J. Lopes
Occurrence of the gasoline oxygenate MTBE and BTEX compounds in urban stormwater in the United States, 1991-95 Occurrence of the gasoline oxygenate MTBE and BTEX compounds in urban stormwater in the United States, 1991-95
Methyl tert-butyl ether (MTBE) is a gasoline oxygenate. Oxygenates such as MTBE, when added to gasoline, increase the gasoline's oxygen level and decrease vehicular carbon monoxide emissions and ozone levels in the atmosphere. MTBE disperses rapidly in water, was the second most frequently detected volatile organic compound (VOC) in a study of shallow urban ground water, and is less...
Authors
Gregory C. Delzer, John S. Zogorski, Thomas J. Lopes, Robin L. Bosshart