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  • Groundwater

    Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formationsA unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table...

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  • Rare Earth Elements in Groundwater Flow Systems

    Rare Earth Elements in Groundwater Flow Systems is the first volume of its kind entirely focused on the geochemistry of the lanthanide series elements in groundwater/aquifer environments Consisting of ten chapters, each of which is an original, peer-reviewed contribution by some of the leading researchers in the study of the low-temperature geochemistry of rare earth elements, the volume ....

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  • Metals and Other Trace Elements

    Trace elements and radon in groundwater across the United States, 1992-2003 Trace-element concentrations in groundwater were evaluated for samples collected between 1992 and 2003 from aquifers across the United States as part of the US Geological Survey National Water-Quality Assessment Program...

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  • Groundwater Chemistry

    Michael R Burkart, Jeffrey D Stoner, in Nitrogen in the Environment: Sources, Problems and Management, 2001 11 Groundwater and Well Water Selection of groundwater chemistry information is critical to understanding whether the aquifer is contaminated or whether wells used for drinking water have intercepted some contaminated ground or surface water adjacent to the well...

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  • Water sources: groundwater

    Much of the earth's fresh water is found in these spac At greater depths, because of the weight of overlying rock, these openings are much smaller, and therefore hold considerably smaller quantities of water Groundwater flows slowly through water-bearing formations (aquifers) at different rat...

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  • Environmental elements

    Regulations & Permits >Environmental review >State Environmental Policy Act (SEPA) >SEPA guidance >SEPA checklist guidance >SEPA Checklist - Section B: Environmental elements >Environmental elements - 3 Water >Environmental elements - 3b Groundwater...

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  • Environmental elements

    We provide guidance to help applicants complete the Water section, Surface water subsection, and the Groundwater subsection section of the SEPA Section B: Environmental elements checklist In Part B of the SEPA environmental checklist, applicants are required to address whether surface waters or ....

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  • Basic Elements of Ground

    Basic Elements of Ground-Water Hydrology With Reference to Conditions in North Carolina By Ralph C Heath US Geological Survey Water-Resources Investigations Open-File Report 80-44 Prepared in cooperation with the North Carolina Department of Natural^ Resources and Community Development Raleigh, North Carolina 1980...

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  • Rare Earth Elements: Potential Natural Tracers for In

    This is an abstract of a proposed presentation and does not necessarily reflect EPA policy The Rare Earth Elements (REEs; lanthanum to lutetium, excluding promethium) have increasingly been used as natural tracers in studies of groundwater flow and groundwater-surface water interactions...

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