Donna Francy (Former Employee)
Science and Products
Filter Total Items: 46
Occurrence and distribution of microbiological indicators in groundwater and stream water
A total of 136 stream water and 143 groundwater samples collected in five important hydrologic systems of the United States were analyzed for microbiological indicators to test monitoring concepts in a nationally consistent program. Total coliforms were found in 99%, Escherichia coli in 97%, and Clostridium perfringens in 73% of stream water samples analyzed for each bacterium. Total coliforms wer
Authors
Donna S. Francy, Dennis R. Helsel, Rebecca A. Nally
Comparison of methods for determining Escherichia coli concentrations in recreational waters
Seventy water samples were collected from three Lake Erie beaches to compare recoveries of Escherichia coli (E. coli) using the USEPA-recommended method for recreational waters (mTEC) to recoveries using three alternative methods (MI, modified mTEC, and Colilert). Statistical tests showed no differences in recoveries of E. coli between MI and mTEC; however, statistically-significant differences we
Authors
D.S. Francy, R.A. Darner
Factors affecting Escherichia coli concentrations at Lake Erie public bathing beaches
The environmental and water-quality factors that affect concentrations of Escherichia coli (E. coli) in water and sediment were investigated at three public bathing beachesEdgewater Park, Villa Angela, and Sims Parkin the Cleveland, Ohio metropolitan area. This study was done to aid in the determination of safe recreational use and to help water- resource managers assess more quickly and accuratel
Authors
Donna S. Francy, Robert A. Darner
Quality-Assurance/Quality-Control Manual for Collection and Analysis of Water-Quality Data in the Ohio District, US Geological Survey
The U.S. Geological Survey (USGS), Water Resources Division (WRD), requires that quality-assurance/quality-control (QA/QC) activities be included in any sampling and analysis program. Operational QA/QC procedures address local needs while incorporating national policies. Therefore, specific technical policies were established for all activities associated with water-quality project being done by t
Authors
D.S. Francy, A.L. Jones, Donna N. Myers, G.L. Rowe, Michael Eberle, K.M. Sarver
Effects of hydrologic, biological, and environmental processes on sources and concentrations of fecal bacteria in the Cuyahoga River, with implications for management of recreational waters in Summit and Cuyahoga Counties, Ohio
Discharges of fecal bacteria (fecal coliform bacteria and Escherichia coli ) to the middle main stem of the Cuyahoga River from storm water, combined sewers, and incompletely disinfected wastewater have resulted in frequent exceedances of bacteriological water-quality standards in a 23-mile reach of the river that flows through the Cuyahoga Valley National Recreation Area. Contamination of the mid
Authors
Donna N. Myers, G. F. Koltun, Donna S. Francy
How do we determine when the beaches are safe for swimming?
The use of Lake Erie and other public waters for swimming is a valuable recreational resource for the people of Ohio and elsewhere in the United States. Water-resource managers and the scientific community have recognized the need for rapid methods to determine the quality of these recreational waters to adequately protect public health.Fecal-indicator bacteria, such as Escherichia coli (E. coli)
Authors
Ronald J. Veley, Donna S. Francy, Robert A. Darner
Effects of receiving-water quality and wastewater treatment on injury, survival, and regrowth of fecal-indicator bacteria and implications for assessment of recreational water quality
Bacterial injury, survival, and regrowth were investigated by use of replicate flow-through incubation chambers placed in the Cuyahoga River or Lake Erie in the greater Cleveland metropolitan area during seven 4-day field studies. The chambers contained wastewater or combined-sewer-overflow (CSO) effluents treated three ways-unchlorinated, chlorinated, and dechlorinated. At timestep intervals, the
Authors
D.S. Francy, T.L. Hart, C.M. Virosteck
Geologic setting and water quality of selected basins in the active coal-mining areas of Ohio, 1989-91, with a summary of water quality for 1985-91
This report presents streamwater- and ground-water-quality data collected to characterize the baseline water quality for 21 drainage basins in the coal-mining region of eastern Ohio. The study area is mostly within the unglaciated part of eastern Ohio along the western edge of the Appalachian Plateaus Physiographic Province. The data collected from 1989-91 and presented in this report represent th
Authors
A. C. Sedam, D.S. Francy
Escherichia coli and fecal-coliform bacteria as indicators of recreational water quality
In 1986, the U.S. Environmental Protection Agency (USEPA) recommended that Escherichia coli (E. coli) be used in place of fecal-coliform bacteria in State recreational water-quality standards as an indicator of fecal contamination. This announcement followed an epidemiological study in which E. coli concentration was shown to be a better predictor of swimming-associated gastrointestinal illness th
Authors
D.S. Francy, Donna N. Myers, K.D. Metzker
Emulsification of hydrocarbons by subsurface bacteria
Biosurfactants have potential for use in enhancement of in situ biorestoration by increasing the bioavailability of contaminants. Microorganisms isolated from biostimulated, contaminated and uncontaminated zones at the site of an aviation fuel spill and hydrocarbon-degrading microorganisms isolated from sites contaminated with unleaded gasoline were examined for their abilities to emulsify petrole
Authors
D.S. Francy, J. M. Thomas, R.L. Raymond, C.H. Ward
Science and Products
Filter Total Items: 46
Occurrence and distribution of microbiological indicators in groundwater and stream water
A total of 136 stream water and 143 groundwater samples collected in five important hydrologic systems of the United States were analyzed for microbiological indicators to test monitoring concepts in a nationally consistent program. Total coliforms were found in 99%, Escherichia coli in 97%, and Clostridium perfringens in 73% of stream water samples analyzed for each bacterium. Total coliforms wer
Authors
Donna S. Francy, Dennis R. Helsel, Rebecca A. Nally
Comparison of methods for determining Escherichia coli concentrations in recreational waters
Seventy water samples were collected from three Lake Erie beaches to compare recoveries of Escherichia coli (E. coli) using the USEPA-recommended method for recreational waters (mTEC) to recoveries using three alternative methods (MI, modified mTEC, and Colilert). Statistical tests showed no differences in recoveries of E. coli between MI and mTEC; however, statistically-significant differences we
Authors
D.S. Francy, R.A. Darner
Factors affecting Escherichia coli concentrations at Lake Erie public bathing beaches
The environmental and water-quality factors that affect concentrations of Escherichia coli (E. coli) in water and sediment were investigated at three public bathing beachesEdgewater Park, Villa Angela, and Sims Parkin the Cleveland, Ohio metropolitan area. This study was done to aid in the determination of safe recreational use and to help water- resource managers assess more quickly and accuratel
Authors
Donna S. Francy, Robert A. Darner
Quality-Assurance/Quality-Control Manual for Collection and Analysis of Water-Quality Data in the Ohio District, US Geological Survey
The U.S. Geological Survey (USGS), Water Resources Division (WRD), requires that quality-assurance/quality-control (QA/QC) activities be included in any sampling and analysis program. Operational QA/QC procedures address local needs while incorporating national policies. Therefore, specific technical policies were established for all activities associated with water-quality project being done by t
Authors
D.S. Francy, A.L. Jones, Donna N. Myers, G.L. Rowe, Michael Eberle, K.M. Sarver
Effects of hydrologic, biological, and environmental processes on sources and concentrations of fecal bacteria in the Cuyahoga River, with implications for management of recreational waters in Summit and Cuyahoga Counties, Ohio
Discharges of fecal bacteria (fecal coliform bacteria and Escherichia coli ) to the middle main stem of the Cuyahoga River from storm water, combined sewers, and incompletely disinfected wastewater have resulted in frequent exceedances of bacteriological water-quality standards in a 23-mile reach of the river that flows through the Cuyahoga Valley National Recreation Area. Contamination of the mid
Authors
Donna N. Myers, G. F. Koltun, Donna S. Francy
How do we determine when the beaches are safe for swimming?
The use of Lake Erie and other public waters for swimming is a valuable recreational resource for the people of Ohio and elsewhere in the United States. Water-resource managers and the scientific community have recognized the need for rapid methods to determine the quality of these recreational waters to adequately protect public health.Fecal-indicator bacteria, such as Escherichia coli (E. coli)
Authors
Ronald J. Veley, Donna S. Francy, Robert A. Darner
Effects of receiving-water quality and wastewater treatment on injury, survival, and regrowth of fecal-indicator bacteria and implications for assessment of recreational water quality
Bacterial injury, survival, and regrowth were investigated by use of replicate flow-through incubation chambers placed in the Cuyahoga River or Lake Erie in the greater Cleveland metropolitan area during seven 4-day field studies. The chambers contained wastewater or combined-sewer-overflow (CSO) effluents treated three ways-unchlorinated, chlorinated, and dechlorinated. At timestep intervals, the
Authors
D.S. Francy, T.L. Hart, C.M. Virosteck
Geologic setting and water quality of selected basins in the active coal-mining areas of Ohio, 1989-91, with a summary of water quality for 1985-91
This report presents streamwater- and ground-water-quality data collected to characterize the baseline water quality for 21 drainage basins in the coal-mining region of eastern Ohio. The study area is mostly within the unglaciated part of eastern Ohio along the western edge of the Appalachian Plateaus Physiographic Province. The data collected from 1989-91 and presented in this report represent th
Authors
A. C. Sedam, D.S. Francy
Escherichia coli and fecal-coliform bacteria as indicators of recreational water quality
In 1986, the U.S. Environmental Protection Agency (USEPA) recommended that Escherichia coli (E. coli) be used in place of fecal-coliform bacteria in State recreational water-quality standards as an indicator of fecal contamination. This announcement followed an epidemiological study in which E. coli concentration was shown to be a better predictor of swimming-associated gastrointestinal illness th
Authors
D.S. Francy, Donna N. Myers, K.D. Metzker
Emulsification of hydrocarbons by subsurface bacteria
Biosurfactants have potential for use in enhancement of in situ biorestoration by increasing the bioavailability of contaminants. Microorganisms isolated from biostimulated, contaminated and uncontaminated zones at the site of an aviation fuel spill and hydrocarbon-degrading microorganisms isolated from sites contaminated with unleaded gasoline were examined for their abilities to emulsify petrole
Authors
D.S. Francy, J. M. Thomas, R.L. Raymond, C.H. Ward