Peter B McMahon (Former Employee)
Science and Products
Filter Total Items: 14
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Filter Total Items: 118
Sampling and analysis plan for the characterization of groundwater quality in two monitoring wells near Pavillion, Wyoming Sampling and analysis plan for the characterization of groundwater quality in two monitoring wells near Pavillion, Wyoming
In June 2010, the U.S. Environmental Protection Agency installed two deep monitoring wells (MW01 and MW02) near Pavillion, Wyoming to study groundwater quality. The U.S Geological Survey, in cooperation with the Wyoming Department of Environmental Quality, designed a plan to collect groundwater data from these monitoring wells. This sampling and analysis plan describes the sampling...
Authors
Peter R. Wright, Peter McMahon
Groundwater-quality and quality-control data for two monitoring wells near Pavillion, Wyoming, April and May 2012 Groundwater-quality and quality-control data for two monitoring wells near Pavillion, Wyoming, April and May 2012
In June 2010, the U.S. Environmental Protection Agency installed two deep monitoring wells (MW01 and MW02) near Pavillion, Wyoming, to study groundwater quality. During April and May 2012, the U.S Geological Survey, in cooperation with the Wyoming Department of Environmental Quality, collected groundwater-quality data and quality-control data from monitoring well MW01 and, following well
Authors
Peter R. Wright, Peter McMahon, David Mueller, Melanie Clark
Dissolved oxygen as an indicator of bioavailable dissolved organic carbon in groundwater Dissolved oxygen as an indicator of bioavailable dissolved organic carbon in groundwater
Concentrations of dissolved oxygen (DO) plotted vs. dissolved organic carbon (DOC) in groundwater samples taken from a coastal plain aquifer of South Carolina (SC) showed a statistically significant hyperbolic relationship. In contrast, DO-DOC plots of groundwater samples taken from the eastern San Joaquin Valley of California (CA) showed a random scatter. It was hypothesized that...
Authors
Francis Chapelle, Paul Bradley, Peter McMahon, Karl Kaiser, Ron Benner
Evolution of redox processes in groundwater Evolution of redox processes in groundwater
No abstract available.
Authors
Peter McMahon, Francis Chapelle, Paul Bradley
Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009 Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009
Previous water-quality assessments reported elevated concentrations of nitrate and methane in water from domestic wells screened in shallow zones of the Wasatch Formation, Garfield County, Colorado. In 2009, the U.S. Geological Survey, in cooperation with the Colorado Department of Public Health and Environment, analyzed samples collected from 26 domestic wells for a diverse set of...
Authors
P.B. McMahon, J.C. Thomas, A.G. Hunt
A comparison of recharge rates in aquifers of the United States based on groundwater-age data A comparison of recharge rates in aquifers of the United States based on groundwater-age data
An overview is presented of existing groundwater-age data and their implications for assessing rates and timescales of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions in aquifers determined from chlorofluorocarbon, sulfur hexafluoride, tritium/helium-3, and radiocarbon measurements from 565 wells in 45 networks were used to calculate...
Authors
P.B. McMahon, Niel Plummer, J.K. Böhlke, S.D. Shapiro, S.R. Hinkle
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 118
Sampling and analysis plan for the characterization of groundwater quality in two monitoring wells near Pavillion, Wyoming Sampling and analysis plan for the characterization of groundwater quality in two monitoring wells near Pavillion, Wyoming
In June 2010, the U.S. Environmental Protection Agency installed two deep monitoring wells (MW01 and MW02) near Pavillion, Wyoming to study groundwater quality. The U.S Geological Survey, in cooperation with the Wyoming Department of Environmental Quality, designed a plan to collect groundwater data from these monitoring wells. This sampling and analysis plan describes the sampling...
Authors
Peter R. Wright, Peter McMahon
Groundwater-quality and quality-control data for two monitoring wells near Pavillion, Wyoming, April and May 2012 Groundwater-quality and quality-control data for two monitoring wells near Pavillion, Wyoming, April and May 2012
In June 2010, the U.S. Environmental Protection Agency installed two deep monitoring wells (MW01 and MW02) near Pavillion, Wyoming, to study groundwater quality. During April and May 2012, the U.S Geological Survey, in cooperation with the Wyoming Department of Environmental Quality, collected groundwater-quality data and quality-control data from monitoring well MW01 and, following well
Authors
Peter R. Wright, Peter McMahon, David Mueller, Melanie Clark
Dissolved oxygen as an indicator of bioavailable dissolved organic carbon in groundwater Dissolved oxygen as an indicator of bioavailable dissolved organic carbon in groundwater
Concentrations of dissolved oxygen (DO) plotted vs. dissolved organic carbon (DOC) in groundwater samples taken from a coastal plain aquifer of South Carolina (SC) showed a statistically significant hyperbolic relationship. In contrast, DO-DOC plots of groundwater samples taken from the eastern San Joaquin Valley of California (CA) showed a random scatter. It was hypothesized that...
Authors
Francis Chapelle, Paul Bradley, Peter McMahon, Karl Kaiser, Ron Benner
Evolution of redox processes in groundwater Evolution of redox processes in groundwater
No abstract available.
Authors
Peter McMahon, Francis Chapelle, Paul Bradley
Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009 Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009
Previous water-quality assessments reported elevated concentrations of nitrate and methane in water from domestic wells screened in shallow zones of the Wasatch Formation, Garfield County, Colorado. In 2009, the U.S. Geological Survey, in cooperation with the Colorado Department of Public Health and Environment, analyzed samples collected from 26 domestic wells for a diverse set of...
Authors
P.B. McMahon, J.C. Thomas, A.G. Hunt
A comparison of recharge rates in aquifers of the United States based on groundwater-age data A comparison of recharge rates in aquifers of the United States based on groundwater-age data
An overview is presented of existing groundwater-age data and their implications for assessing rates and timescales of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions in aquifers determined from chlorofluorocarbon, sulfur hexafluoride, tritium/helium-3, and radiocarbon measurements from 565 wells in 45 networks were used to calculate...
Authors
P.B. McMahon, Niel Plummer, J.K. Böhlke, S.D. Shapiro, S.R. Hinkle