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Page 2517, results 62901 - 62925

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Field tests of nylon-screen diffusion samplers and pushpoint samplers for detection of metals in sediment pore water, Ashland and Clinton, Massachusetts, 2003
Marc J. Zimmerman, Don A. Vroblesky, Kimberly W. Campo, Andrew J. Massey, Walter Scheible
2005, Scientific Investigations Report 2005-5155
Efficient and economical screening methods are needed to detect and to determine the approximate concentrations of potentially toxic trace-element metals in shallow groundwater- discharge areas (pore water) where the metals may pose threats to aquatic organisms; such areas are likely to be near hazardous-waste sites. Pushpoint and nylon-screen diffusion samplers...
Estimates of ground-water recharge based on streamflow-hydrograph methods: Pennsylvania
Dennis W. Risser, Randall W. Conger, James E. Ulrich, Michael P. Asmussen
2005, Open-File Report 2005-1333
This study, completed by the U.S. Geological Survey (USGS) in cooperation with the Pennsylvania Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey (T&GS), provides estimates of ground-water recharge for watersheds throughout Pennsylvania computed by use of two automated streamflow-hydrograph-analysis methods--PART and RORA. The PART computer program...
Geochemical assessment of metals and dioxin in sediment from the San Carlos Reservoir and the Gila, San Carlos, and San Francisco Rivers, Arizona
Stan E. Church, LaDonna M. Choate, Marci E. Marot, David L. Fey, Monique Adams, Paul H. Briggs, Zoe Ann Brown
2005, Scientific Investigations Report 2005-5086
In October 2004, we sampled stream-bed sediment, terrace sediment, and sediment from the San Carlos Reservoir to determine the spatial and chronological variation of six potentially toxic metals-Cu, Pb, Zn, Cd, As, and Hg. Water levels in the San Carlos Reservoir were at a 20-year low at an elevation of...
Use of discrete-zone monitoring systems for hydraulic characterization of a fractured-rock aquifer at the University of Connecticut Landfill, Storrs, Connecticut, 1999 to 2002
Carole D. Johnson, Christopher S. Kochiss, C. B. Dawson
2005, Water-Resources Investigations Report 2003-4338
The U.S. Geological Survey, in cooperation with the University of Connecticut, used a suite of hydraulic methods to characterize the hydrogeology of a fractured-rock aquifer near the former landfill and chemical-waste disposal pits at the University of Connecticut, Storrs, Connecticut. Multiple methods were used to determine head, driving potential, and...
Quaternary Geologic Map of Connecticut and Long Island Sound Basin
Janet Radway Stone, John P. Schafer, Elizabeth Haley London, Mary L. DiGiacomo-Cohen, Ralph S. Lewis, Woodrow B. Thompson
2005, Scientific Investigations Map 2784
The Quaternary geologic map (sheet 1) and explanatory figures and cross sections (sheet 2) portray the geologic features formed in Connecticut during the Quaternary Period, which includes the Pleistocene (glacial) and Holocene (postglacial) Epochs. The Quaternary Period has been a time of development of many details of the landscape and...
Geology of the proposed Yucca Mountain repository site, Nevada
John H. Peck, David C. Buesch
2005, Conference Paper
Yucca Mountain, located about 100 miles northwest of Las Vegas, Nevada, has been recommended by the President for a mined geologic repository for high-level radioactive waste. This field trip will examine the geologic and hydrologic setting for Yucca Mountain, as well as specific results of the site characterization program. The...
Nebraska, Kansas, and Oklahoma aeromagnetic and gravity maps and data: A web site for distribution of data
Ronald E. Sweeney, Patricia L. Hill
2005, Data Series 138
The Nebraska, Kansas, and Oklahoma aeromagnetic grid is constructed from grids that combine information collected in 28 separate aeromagnetic surveys conducted between 1954 and 1985. The data from these surveys are of varying quality. The design and specifications (terrain clearance, sampling rates, line spacing, and reduction procedures) varied from survey...
Effects of spray-irrigated treated effluent on water quantity and quality, and the fate and transport of nitrogen in a small watershed, New Garden Township, Chester County, Pennsylvania
Curtis L. Schreffler, Daniel G. Galeone, John M. Veneziale, Leif E. Olson, David L. O’Brien
2005, Scientific Investigations Report 2005-5043
An increasing number of communities in Pennsylvania are implementing land-treatment systems to dispose of treated sewage effluent. Disposal of treated effluent by spraying onto the land surface, instead of discharging to streams, may recharge the ground-water system and reduce degradation of stream-water quality. The U.S. Geological Survey (USGS), in cooperation...
Iowa magnetic and gravity maps and data: A web site for distribution of data
Robert P. Kucks, Patricia L. Hill
2005, Data Series 135
Magnetic anomalies are due to variations in the Earth's magnetic field caused by the uneven distribution of magnetic minerals (primarily magnetite) in the rocks that make up the upper part of the Earth's crust. The features and patterns of the magnetic anomalies can be used to delineate details of subsurface...
Quality of nutrient data from streams and ground water sampled during water years 1992-2001
David K. Mueller, Cindy J. Titus
2005, Scientific Investigations Report 2005-5106
Proper interpretation of water-quality data requires consideration of the effects that bias and variability might have on measured constituent concentrations. In this report, methods are described to estimate the bias due to contamination of samples in the field or laboratory and the variability due to sample collection, processing, shipment, and...
Trends in surface-water quality at selected National Stream Quality Accounting Network (NASQAN) stations, in Michigan
Atiq U. Syed, Lisa R. Fogarty
2005, Scientific Investigations Report 2005-5158
To demonstrate the value of long-term, water-quality monitoring, the Michigan Department of Environmental Quality (MDEQ), in cooperation with the U.S. Geological Survey (USGS), initiated a study to evaluate potential trends in water-quality constituents for selected National Stream Quality Accounting Network (NASQAN) stations in Michigan. The goal of this study is...
Questa baseline and pre-mining ground-water quality investigation. 12. Geochemical and reactive-transport modeling based on tracer injection-synoptic sampling studies for the Red River, New Mexico, 2001-2002
James W. Ball, Robert L. Runkel, D. Kirk Nordstrom
2005, Scientific Investigations Report 2005-5149
Reactive-transport processes in the Red River, downstream from the town of Red River in north-central New Mexico, were simulated using the OTEQ reactive-transport model. The simulations were calibrated using physical and chemical data from synoptic studies conducted during low-flow conditions in August 2001 and during March/April 2002. Discharge over the 20-km reach...
Mining Claim Activity on Federal Land for the Period 1976 through 2003
J. Douglas Causey
2005, Data Series 124
Previous reports on mining claim records provided information and statistics (number of claims) using data from the U.S. Bureau of Land Management's (BLM) Mining Claim Recordation System. Since that time, BLM converted their mining claim data to the Legacy Repost 2000 system (LR2000). This report describes a process to extract...
Zero-headspace coal-core gas desorption canister, revised desorption data analysis spreadsheets and a dry canister heating system
Charles E. Barker, Todd A. Dallegge
2005, Open-File Report 2005-1177
Coal desorption techniques typically use the U.S. Bureau of Mines (USBM) canister-desorption method as described by Diamond and Levine (1981), Close and Erwin (1989), Ryan and Dawson (1993), McLennan and others (1994), Mavor and Nelson (1997) and Diamond and Schatzel (1998). However, the coal desorption canister designs historically used with...