groundwater resource News
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Groundwater Discharge to Upper Colorado River Basin Varies in Response to Drought
Groundwater discharge that flows into the Upper Colorado River Basin varies in response to drought, which is likely due to aquifer systems that contain relatively young groundwater, according to a new U.S. Geological Survey study published in Hydrogeology Journal. The Colorado River and its tributaries provide water to more than 40 million people in seven states, irrigate more than 5.5 million ...
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EPA approves plan for cleanup of US landfill superfund site
Installations of a multi-layered engineered cover and a system of new monitoring wells are among a series of key remedial actions that will best serve to protect groundwater resources and human health at the West Lake Landfill Superfund Site in Bridgeton, Mo., according to a plan formally approved by EPA. EPA's Record of Decision document on the West Lake Landfill site also includes public ...
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Ultra-fine coatings on sediment grains influence nitrate and sulfate storage in soil
Tiny sediment grains are covered with a very fine-grained, complex mixture of minerals in an open fabric that results in a large surface area in contact with water between the grains. Scientists at the U.S. Geological Survey (USGS) are studying this microscopic layer and finding that the mineral composition of these coatings on sediment grains in the unsaturated zone (i.e., between land surface ...
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EPA settles with Flint Hills Resources Alaska, LLC, for hazardous waste violations at its North Pole Facility
The U.S. Environmental Protection Agency has reached a settlement with Flint Hills Resources, which owns and operated a petroleum refinery in North Pole, Alaska, for alleged mishandling of hazardous waste generated during groundwater cleanup actions at the refinery. On June 19, 2013, Flint Hills Resources (FHR) conducted groundwater cleanup activities at its North Pole refinery that generated ...
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