Publications

VOC’s are carbon-containing chemicals that readily evaporate at normal air temperature and pressure. They are contained in many commercial products such as gasoline, paints, adhesives, solvents, wood preservatives, dry-cleaning agents, pesticides, cosmetics, correction fluid, and refrigerants. Approximately 15 million pounds of VOC’s were released to the atmosphere in the focused study...

A numerical model was developed to simulate ground-water flow in the Tri-County region, which consists of Clinton, Eaton, and Ingham Counties, Michigan. This region includes a nine-township area surrounding Lansing, Michigan. The model simulates the regional response of the Saginaw aquifer to major groundwater withdrawals associated with public-supply wells. The Saginaw aquifer, which is...

Among the duties of the water managers of the Leech Lake Indian Reservation in north-central Minnesota are the development and protection of the water resources of the Reservation. The U.S. Geological Survey, in cooperation with the Leech Lake Indian Reservation Business Committee, conducted a three and one half-year study (1988-91) of the ground-water resources of the Leech Lake Indian

North Fish Creek is underused as a trout and salmon hatchery despite its excellent water quality. The shifting-sand streambed in the lower 9 miles of the stream inhibits successful spawning and is a poor habitat for macroinvertebrates, the primary food for juvenile trout and salmon. To provide data necessary for evaluation of potential sand-loading-control practices, the U.S. Geological...

Laboratory and quality assurance procedures for the analysis of ground-water samples for herbicides at the Management Systems Evaluation Area near Princeton, Minnesota are described. The target herbicides include atrazine, de-ethylatrazine, de-isopropylatrazine, metribuzin, alachlor, 2,6-diethylaniline, and metolachlor. The analytical techniques used are solid-phase extraction, and...

A numerical model of ground-water flow in the Twin Cities metropolitan area was converted from the TrescottLarson computer code to the McDonald-Harbaugh computer code to facilitate current and future use of the model using up-to-date computer software and hardware. Differences exist between the two computer codes in how headdependent source-sink functions, including leaky rivers, springs...

No abstract available.

No abstract available.

A leaking underground storage tank was removed from the Michigan Department of Transportation maintenance garage area in Kalamazoo County., Mich., in 1985. The tank had been leaking unleaded gasoline. Although a remediation system was operational at the site for several years after the tank was removed, ground-water samples collected from monitoring wells in the area consistently showed...

In 1992, the Wisconsin Department of Natural Resources (WDNR) in cooperation with the U.S. Geological Survey initiated a land-use inventory to identify sources of pollutants and track the land-management changes for eight evaluation monitoring watersheds established as part of the WDNR's Nonpoint Source Program. Each evaluation monitoring watershed is within a WDNR priority watershed...

The U.S. Geological Survey collected Stormwater samples from eight Lake Superior Basin cities to determine the quality of urban runoff entering Lake Superior from urban areas. The samples were collected during July 1993-September 1994 from storm sewers in Ishpeming, Negaunee, Sault Ste. Marie, and Houghton, Michigan; Virginia and Ribbing, Minnesota; and Ashland and Hurley, Wisconsin...

Section 402(P) of the Water Quality Control Act of 1987 requires that municipalities with a population of 100,000 or more obtain permits to discharge stormwater runoff and to control its quality. Monitoring and sampling of stormwater runoff from seven drainage basins in Madison, Wis., was performed from April 1993 through November 1994 by the U.S. Geological Survey and the city of...