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Page 506, results 12626 - 12650

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Reconnaissance data for selected herbicides, two atrazine metabolities, and nitrate in surface water of the Midwestern United States, 1989-90
E.A. Scribner, E.M. Thurman, D. A. Goolsby, M. T. Meyer, M. S. Mills, M.L. Pomes
1993, Open-File Report 93-457
Water-quality data were collected from 147 rivers and streams during 1989-90 to assess selected preemergent herbicides, two atrazine metabolites, and nitrate in 10 Midwestern States. This report includes a description of the sampling design, data collection techniques, laboratory and analytical methods, and a compilation of constituent concentrations and quality-assurance data....
Water resources activities of the USGS, 1992
E. T. Smith (compiler)
1993, Open-File Report 92-117
The Water Resources Division (WRD) of the U.S. Geological Survey has the principal responsibility within the Federal Government for providing hydrologic information and appraising the Nation's water resources. The USGS is unique among government organizations because it has neither regulatory nor developmental authority. Information that is made available equally to...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of inorganic and organic constituents in water and fluvial sediments
M. J. Fishman, editor(s)
1993, Open-File Report 93-125
Methods to be used to analyze samples of water, suspended sediment and bottom material for their content of inorganic and organic constituents are presented. Technology continually changes, and so this laboratory manual includes new and revised methods for determining the concentration of dissolved constituents in water, whole water recoverable constituents...
Surface- and ground-water quality data at selected landfill sites in Mecklenburg County, North Carolina, 1979-92
D.G. Smith
1993, Open-File Report 93-437
The U.S. Geological Survey initiated an urban water-quality study in 1979 in cooperation with the City of Charlotte and Mecklenburg County, North Carolina. As part of this study, a water-quality monitoring network was established at selected landfill sites in Mecklenburg County. Water-quality samples were collected at 27 surface-water sites and...
Hydrogeologic data collected from a crude-oil spill site near Bemidji, Minnesota, 1983-91
S. E. Smith, M. F. Hult
1993, Open-File Report 93-496
The U.S. Geological Survey began a research project at the site of a crude oil spill near Bemidji, Minnesota in 1983. The project is part of the U.S. Geological Survey's Toxic Substances Hydrology Program. The objectives of research at this site are to obtain an understanding of the mobilization, transport,...
Evaluation of nonpoint-source contamination, Wisconsin: Selected data for 1992 water year
D.J. Graczyk, J.F. Walker, S.R. Greb, Steven R. Corsi, D.W. Owens
1993, Open-File Report 93-630
This report presents the annual results of the U.S. Geological Survey's (USGS) watershed-management evaluation monitoring program in Wisconsin. The overall objective of each individual project in the program is to determine if the water chemistry in the receiving stream has changed as a result of the implementation of land-management practices...
Agricultural chemical interchange between ground water and surface water, Cedar River basin, Iowa and Minnesota: A study description
P. J. Squillace, M. J. Liszewski, E.M. Thurman
1993, Open-File Report 92-85
A review of the data collected in the Cedar River basin, Iowa and Minnesota, indicates that atrazine is consistently detected in the main-stem river at concentrations greater than 0.10 microgram per liter even during periods of extended base flow. The primary source of atrazine in the river during these periods...
Water wells on St. Thomas, U.S. Virgin Islands
J.I. Steiger, Richard Kessler
1993, Open-File Report 91-504
This report is a compilation of well-inventory data collected from December 1989 to December 1990 on St. Thomas, U.S. Virgin Islands from 367 wells. The report includes well locations on 1982, 7.5 minute series, USGS topographic maps, which are published to scale, and tables of selected well data. The report...