Assessment of ground-water contamination by coal-tar derivatives, St. Louis Park area, Minnesota

Hult, Marc F.

doi:10.3133/ofr84867

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…(See figure 48.) Coal-tar derivatives migrated northward in the Prairie du Chien-Jordan aquifer because of local reversals in the regional gradient caused by groundwater withdrawals and the flow of water into the aquifer from other aquifers through wells that tap several aquifers (multiaquifer wells) (Hult, 1984). Aided by computer simulations of ground-water flow (Stark and Hult, 1985a,b), Federal, State, and local agency personnel and representatives of the former plant have designed a system to control hydraulic gradients and, thereby, the direction of contaminant transport in the Prairie du Chien-Jordan aquifer and to treat and use contaminated water from the wells.…”

Section: Discussionmentioning

confidence: 99%

National water summary 1986: Hydrologic events and ground-water quality

Moody¹,

Carr²,

Chase³

et al. 1988

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National Water Summary 1986 Hydrologic Events and Ground-Water Quality is the fourth in a series of annual reports that describe the conditions, trends, availability, quality, and use of the Nation's water resources. This year's report continues a discussion, begun in the 1984 National Water Summary, of principal aquifers in each State by assembling available information about the existing water quality of each aquifer, the location of major areas of known contamination and potential sources of contamination, and steps being taken by the States to manage their ground water. This subject is particularly timely because of the growing national awareness and concern that this important source of water supply is vulnerable to contamination by toxic industrial, domestic, and agricultural wastes.The U.S. Geological Survey has been engaged in the study of the quantity and quality of ground-water resources of the United States for more than a century. Survey geologists early noted the importance of hydrogeologic information to the search for ground-water supplies in the plains country around Denver, Colo. S.F. Emmons, Geologist-in-Charge of the Division of the Rocky Mountains, included the following observation in his 1884 annual report to Director John Wesley Powell:The practical bearing of this study [of the Denver water supply] is not confined to Denver, but extends to the whole region of the great plains. While the existence of a synclinal basin has long been known to us from the hasty observations one makes in simply passing over the country, accurate and reliable maps and profiles are an indispensible basis for the observations which shall determine the true source of the water supply, the amount and quality that may be expected from different geologic horizons, and the most favorable points for sinking artesian wells; it is in large degree owing to the want of this accurate preliminary knowledge that the money already appropriated by Congress and spent in sinking artesian wells upon the plains of Colorado has been so barren of practical and definite results. (U.

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Section: Discussionmentioning

confidence: 99%

National water summary 1986: Hydrologic events and ground-water quality

Moody¹,

Carr²,

Chase³

et al. 1988

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“…Hult and Schoenberg (1984) present an overview of the problem. Hult (1984) and Stark and Hult (1985) discuss contamination of the Prairie du Chien-Jordan aquifer and document the construction and calibration of a three-dimensional ground-water-flow model used to evaluate pumping strategies to control ground-water movement in the Prairie du Chien-Jordan aquifer. This report evaluates various pumping strategies to control ground-water movement in the St. Peter aquifer.…”

mentioning

confidence: 99%

“…Ground-water flow in the St. Peteriaquife:: moves in a general west to east direction near the plant site (Hult, 1984 ment into the St. Peter aquifer has been influenced by flow in a multiaquifer well located on the plant site, by othei: nearby multiaquifer wells, by stresses from production wells and by downward grounl-water flow in bedrock valleys. Hult (1984) and Ehrlich and others (1982) presented data that showed that the concentrations of several inorganic constituents, resulting from activities at (Trace of section shown in Figure 4) (Hydrogeology from Hult, 1984, p. 19) the plant site decreased downgradient in the glacial-drift aquifers. The data also showed that the concentrations of the constituents were elevated near a bedrock valley.…”

mentioning

confidence: 99%

Simulation of ground-water flow in the St Peter aquifer in an area contaminated by coal-tar derivatives, St Louis Park, Minnesota

Lorenz¹,

Stark²

1990

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A model constructed to simulate ground-water flow in part of the Prairie du Chien-Jordan and St. Peter aquifers, St. Louis Park, Minnesota, was used to test hypotheses about the movement of ground water contaminated with coal-tar derivatives and to simulate alternatives for reducing the downgradient movement of contamination in the St. Peter aquifer. The model, constructed for a previous study, was applied to simulate the effects of current ground-water withdrawals on the potentiometric surface of the St. Peter aquifer. Multiaquifer wells served as conduits for vertical exchange of water from the St. Peter aquifer to the Prairie du Chien-Jordan aquifer. Model simulations predict that the multiaquifer wells have the potential to limit downgradient migration of contaminants in the St. Peter aquifer caused by cones of depression created around the multiaquifer wells. Differences in vertical leakage to the St. Peter aquifer may exist in areas of bedrock valleys. Model simulations indicate that these differences are not likely to affect significantly the general patterns of ground-water flow.Model simulations also indicated that drawdown caused by pumping two wells, each pumping at 75 gallons per minute and located about 1 mile southeast of the source of contamination, would be effective in controlling movement and volume of contaminated ground water in the immediate area of the source of contamination. Some contamination may already have moved beyond the influence of these wells, however, because of a complex set of hydraulic conditions.

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Assessment of ground-water contamination by coal-tar derivatives, St. Louis Park area, Minnesota

Cited by 2 publications

References 5 publications

National water summary 1986: Hydrologic events and ground-water quality

National water summary 1986: Hydrologic events and ground-water quality

Simulation of ground-water flow in the St Peter aquifer in an area contaminated by coal-tar derivatives, St Louis Park, Minnesota

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