Gregory C. Delzer, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 35
Organic compounds in Elm Fork Trinity River water used for public supply near Carrollton, Texas, 2002–05 Organic compounds in Elm Fork Trinity River water used for public supply near Carrollton, Texas, 2002–05
Organic compounds studied in this U.S. Geological Survey (USGS) assessment generally are man-made, including pesticides, solvents, gasoline hydrocarbons, personal-care and domestic-use products, refrigerants, and propellants. A total of 103 of 277 compounds were detected at least once among the 30 samples of source water for a community water system on the Elm Fork Trinity River near...
Authors
Patricia B. Ging, Gregory C. Delzer, Pixie A. Hamilton
Organic compounds in Potomac River water used for public supply near Washington, D.C., 2003-05 Organic compounds in Potomac River water used for public supply near Washington, D.C., 2003-05
Organic compounds studied in this U.S. Geological Survey (USGS) assessment generally are man-made, including, in part, pesticides, solvents, gasoline hydrocarbons, personal care and domestic-use products, and refrigerants and propellants. A total of 85 of 277 compounds were detected at least once among the 25 samples collected approximately monthly during 2003-05 at the intake of the...
Authors
Michael J. Brayton, Judith M. Denver, Gregory C. Delzer, Pixie A. Hamilton
Anthropogenic organic compounds in source water of nine community water systems that withdraw from streams, 2002-05 Anthropogenic organic compounds in source water of nine community water systems that withdraw from streams, 2002-05
Source water, herein defined as stream water collected at a water-system intake prior to water treatment, was sampled at nine community water systems, ranging in size from a system serving about 3,000 people to one that serves about 2 million people. As many as 17 source-water samples were collected at each site over about a 12-month period between 2002 and 2004 for analysis of 258...
Authors
James A. Kingsbury, Gregory C. Delzer, Jessica A. Hopple
Man-made organic compounds in source water of nine community water systems that withdraw from streams, 2002-05 Man-made organic compounds in source water of nine community water systems that withdraw from streams, 2002-05
Initial findings from a national study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) characterize the occurrence of about 250 anthropogenic organic compounds in source water (defined as water collected at a surface-water intake prior to water treatment) at nine community water systems in nine States in the Nation. The organic compounds...
Authors
James A. Kingsbury, Gregory C. Delzer, Pixie A. Hamilton
Study design and percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve water samples containing free chlorine, 2004-06 Study design and percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve water samples containing free chlorine, 2004-06
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) began implementing Source Water-Quality Assessments (SWQAs) in 2002 that focus on characterizing the quality of source water and finished water of aquifers and major rivers used by some of the larger community water systems in the United States. As used for SWQA studies, source water is the raw...
Authors
Joshua F. Valder, Gregory C. Delzer, Curtis V. Price, Mark W. Sandstrom
National Water-Quality Assessment Program - Source Water-Quality Assessments National Water-Quality Assessment Program - Source Water-Quality Assessments
In 2002, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) implemented Source Water-Quality Assessments (SWQAs) to characterize the quality of selected rivers and aquifers used as a source of supply to community water systems in the United States. These assessments are intended to complement drinking-water monitoring required by Federal, State...
Authors
Gregory C. Delzer, Pixie A. Hamilton
Anthropogenic Organic Compounds in Ground Water and Finished Water of Community Water Systems in the Northern Tampa Bay Area, Florida, 2002-04 Anthropogenic Organic Compounds in Ground Water and Finished Water of Community Water Systems in the Northern Tampa Bay Area, Florida, 2002-04
As part of the U.S. Geological Survey's (USGS's) National Water-Quality Assessment (NAWQA) Program, a Source Water-Quality Assessment (SWQA) was conducted in the unconfined and semiconfined portions of the Upper Floridan aquifer system during 2002-04. SWQAs are two-phased sampling activities, wherein phase 1 was designed to evaluate the occurrence of 258 anthropogenic organic compounds...
Authors
Patricia A. Metz, Gregory C. Delzer, Marian P. Berndt, Christy A. Crandall, Patricia L. Toccalino
Concentration data for anthropogenic organic compounds in ground water, surface water, and finished water of selected community water systems in the United States, 2002-05 Concentration data for anthropogenic organic compounds in ground water, surface water, and finished water of selected community water systems in the United States, 2002-05
The National Water-Quality Assessment Program of the U.S. Geological Survey began implementing Source Water-Quality Assessments (SWQAs) in 2001 that focus on characterizing the quality of source water and finished water of aquifers and major rivers used by some of the larger community water systems (CWSs) in the United States. As used for SWQA studies, source water is the raw (ambient)...
Authors
Janet M. Carter, Gregory C. Delzer, James A. Kingsbury, Jessica A. Hopple
Anthropogenic Organic Compounds in Source and Finished Water from Community Water System Wells in Western and Central Connecticut, 2002-2004 Anthropogenic Organic Compounds in Source and Finished Water from Community Water System Wells in Western and Central Connecticut, 2002-2004
A water-quality assessment by the U.S. Geological Survey (USGS) determined the occurrence of anthropogenic (manmade) organic compounds (AOCs) in water from 15 community water system (CWS) wells and associated finished drinking water. The study, which focused on water from the unconfined glacial stratified aquifer in western and central Connecticut, was conducted as part of the USGS...
Authors
Thoams J. Trombley, Craig J. Brown, Gregory C. Delzer
Occurrence of anthropogenic organic compounds in ground water and finished water of community water systems in Eagle and Spanish Springs Valleys, Nevada, 2002-2004 Occurrence of anthropogenic organic compounds in ground water and finished water of community water systems in Eagle and Spanish Springs Valleys, Nevada, 2002-2004
As a part of the U.S. Geological Survey's National Water-Quality Assessment Program, an effort to characterize the quality of major rivers and aquifers used as a source of supply to some of the largest community water systems (CWSs) in the United States has been initiated. These studies, termed Source Water-Quality Assessments (SWQAs), consist of two sampling phases. Phase 1 was designed...
Authors
Michael R. Rosen, Donald H. Shaefer, Patricia A. Toccalino, Gregory C. Delzer
Occurrence of MTBE and other gasoline oxygenates in CWS source waters Occurrence of MTBE and other gasoline oxygenates in CWS source waters
Results from two national surveys indicate that the gasoline oxygenate methyl tertiary butyl ether (MTBE) is one of the most frequently detected volatile organic compounds in source waters used by community water systems in the United States. Three other ether oxygenates were detected infrequently but almost always co-occurred with MTBE. A random sampling of source waters across the...
Authors
Janet M. Carter, Stephen J. Grady, Gregory C. Delzer, Bart Koch, John S. Zogorski
Contamination of ground water by PCE - A national perspective Contamination of ground water by PCE - A national perspective
Perchloroethylene (PCE) has physical and chemical properties that make it likely to persist in groundwater if released to the environment. The US Geological Survey has collected or compiled data on the occurrence of PCE in groundwater from major aquifers around the US. These data represent the occurrence of PCE in the groundwater resource as a whole and not occurrence at specific release...
Authors
M.J. Moran, G.C. Delzer
Science and Products
Filter Total Items: 35
Organic compounds in Elm Fork Trinity River water used for public supply near Carrollton, Texas, 2002–05 Organic compounds in Elm Fork Trinity River water used for public supply near Carrollton, Texas, 2002–05
Organic compounds studied in this U.S. Geological Survey (USGS) assessment generally are man-made, including pesticides, solvents, gasoline hydrocarbons, personal-care and domestic-use products, refrigerants, and propellants. A total of 103 of 277 compounds were detected at least once among the 30 samples of source water for a community water system on the Elm Fork Trinity River near...
Authors
Patricia B. Ging, Gregory C. Delzer, Pixie A. Hamilton
Organic compounds in Potomac River water used for public supply near Washington, D.C., 2003-05 Organic compounds in Potomac River water used for public supply near Washington, D.C., 2003-05
Organic compounds studied in this U.S. Geological Survey (USGS) assessment generally are man-made, including, in part, pesticides, solvents, gasoline hydrocarbons, personal care and domestic-use products, and refrigerants and propellants. A total of 85 of 277 compounds were detected at least once among the 25 samples collected approximately monthly during 2003-05 at the intake of the...
Authors
Michael J. Brayton, Judith M. Denver, Gregory C. Delzer, Pixie A. Hamilton
Anthropogenic organic compounds in source water of nine community water systems that withdraw from streams, 2002-05 Anthropogenic organic compounds in source water of nine community water systems that withdraw from streams, 2002-05
Source water, herein defined as stream water collected at a water-system intake prior to water treatment, was sampled at nine community water systems, ranging in size from a system serving about 3,000 people to one that serves about 2 million people. As many as 17 source-water samples were collected at each site over about a 12-month period between 2002 and 2004 for analysis of 258...
Authors
James A. Kingsbury, Gregory C. Delzer, Jessica A. Hopple
Man-made organic compounds in source water of nine community water systems that withdraw from streams, 2002-05 Man-made organic compounds in source water of nine community water systems that withdraw from streams, 2002-05
Initial findings from a national study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) characterize the occurrence of about 250 anthropogenic organic compounds in source water (defined as water collected at a surface-water intake prior to water treatment) at nine community water systems in nine States in the Nation. The organic compounds...
Authors
James A. Kingsbury, Gregory C. Delzer, Pixie A. Hamilton
Study design and percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve water samples containing free chlorine, 2004-06 Study design and percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve water samples containing free chlorine, 2004-06
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) began implementing Source Water-Quality Assessments (SWQAs) in 2002 that focus on characterizing the quality of source water and finished water of aquifers and major rivers used by some of the larger community water systems in the United States. As used for SWQA studies, source water is the raw...
Authors
Joshua F. Valder, Gregory C. Delzer, Curtis V. Price, Mark W. Sandstrom
National Water-Quality Assessment Program - Source Water-Quality Assessments National Water-Quality Assessment Program - Source Water-Quality Assessments
In 2002, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) implemented Source Water-Quality Assessments (SWQAs) to characterize the quality of selected rivers and aquifers used as a source of supply to community water systems in the United States. These assessments are intended to complement drinking-water monitoring required by Federal, State...
Authors
Gregory C. Delzer, Pixie A. Hamilton
Anthropogenic Organic Compounds in Ground Water and Finished Water of Community Water Systems in the Northern Tampa Bay Area, Florida, 2002-04 Anthropogenic Organic Compounds in Ground Water and Finished Water of Community Water Systems in the Northern Tampa Bay Area, Florida, 2002-04
As part of the U.S. Geological Survey's (USGS's) National Water-Quality Assessment (NAWQA) Program, a Source Water-Quality Assessment (SWQA) was conducted in the unconfined and semiconfined portions of the Upper Floridan aquifer system during 2002-04. SWQAs are two-phased sampling activities, wherein phase 1 was designed to evaluate the occurrence of 258 anthropogenic organic compounds...
Authors
Patricia A. Metz, Gregory C. Delzer, Marian P. Berndt, Christy A. Crandall, Patricia L. Toccalino
Concentration data for anthropogenic organic compounds in ground water, surface water, and finished water of selected community water systems in the United States, 2002-05 Concentration data for anthropogenic organic compounds in ground water, surface water, and finished water of selected community water systems in the United States, 2002-05
The National Water-Quality Assessment Program of the U.S. Geological Survey began implementing Source Water-Quality Assessments (SWQAs) in 2001 that focus on characterizing the quality of source water and finished water of aquifers and major rivers used by some of the larger community water systems (CWSs) in the United States. As used for SWQA studies, source water is the raw (ambient)...
Authors
Janet M. Carter, Gregory C. Delzer, James A. Kingsbury, Jessica A. Hopple
Anthropogenic Organic Compounds in Source and Finished Water from Community Water System Wells in Western and Central Connecticut, 2002-2004 Anthropogenic Organic Compounds in Source and Finished Water from Community Water System Wells in Western and Central Connecticut, 2002-2004
A water-quality assessment by the U.S. Geological Survey (USGS) determined the occurrence of anthropogenic (manmade) organic compounds (AOCs) in water from 15 community water system (CWS) wells and associated finished drinking water. The study, which focused on water from the unconfined glacial stratified aquifer in western and central Connecticut, was conducted as part of the USGS...
Authors
Thoams J. Trombley, Craig J. Brown, Gregory C. Delzer
Occurrence of anthropogenic organic compounds in ground water and finished water of community water systems in Eagle and Spanish Springs Valleys, Nevada, 2002-2004 Occurrence of anthropogenic organic compounds in ground water and finished water of community water systems in Eagle and Spanish Springs Valleys, Nevada, 2002-2004
As a part of the U.S. Geological Survey's National Water-Quality Assessment Program, an effort to characterize the quality of major rivers and aquifers used as a source of supply to some of the largest community water systems (CWSs) in the United States has been initiated. These studies, termed Source Water-Quality Assessments (SWQAs), consist of two sampling phases. Phase 1 was designed...
Authors
Michael R. Rosen, Donald H. Shaefer, Patricia A. Toccalino, Gregory C. Delzer
Occurrence of MTBE and other gasoline oxygenates in CWS source waters Occurrence of MTBE and other gasoline oxygenates in CWS source waters
Results from two national surveys indicate that the gasoline oxygenate methyl tertiary butyl ether (MTBE) is one of the most frequently detected volatile organic compounds in source waters used by community water systems in the United States. Three other ether oxygenates were detected infrequently but almost always co-occurred with MTBE. A random sampling of source waters across the...
Authors
Janet M. Carter, Stephen J. Grady, Gregory C. Delzer, Bart Koch, John S. Zogorski
Contamination of ground water by PCE - A national perspective Contamination of ground water by PCE - A national perspective
Perchloroethylene (PCE) has physical and chemical properties that make it likely to persist in groundwater if released to the environment. The US Geological Survey has collected or compiled data on the occurrence of PCE in groundwater from major aquifers around the US. These data represent the occurrence of PCE in the groundwater resource as a whole and not occurrence at specific release...
Authors
M.J. Moran, G.C. Delzer