Sentences with phrase «of groundwater wells»

At least 140 million people in Asia are drinking arsenic - contaminated water, and the ever - expanding use of groundwater wells — a growing population needs water to drink, and farmers need it to grow crops to feed them — has been making the situation worse.

Developed project specifications, such as placement of wells at site, design and selection of groundwater well construction materials, and analytical sampling plans.

Not exact matches

They should instead re-examine their practices that might have led to traces of, for example, diesel turning up in the Wyoming groundwater and come up with standards that would make leaks along the well bore impossible before less appropriate and more costly rules are thrust upon them at a time when natural gas prices are hitting 10 - year lows.

One study out of Duke University found a higher - than - average presence of methane in water wells located close to fracking operations, but methane in groundwater can come from a variety of sources, including organic decomposition near the surface.

Most of the potential causes of groundwater contamination, such as fluid or gases travelling along well bores, are avoidable and there are ways to conserve fresh water.

Yet we who live in Chilliwack know that the pipeline route runs through two school yards, crosses our city's protected groundwater zone and passes within capture zones of city wells.

The group discovered that the dump contained toxic materials that were contaminating the groundwater of Billerica and the Concord River, as well as creating other threats to human health.

Human groundwater contamination can be related to waste disposal (private sewage disposal systems, land disposal of solid waste, municipal wastewater, wastewater impoundments, land spreading of sludge, brine disposal from the petroleum industry, mine wastes, deep - well disposal of liquid wastes, animal feedlot wastes, radioactive wastes) or not directly related to waste disposal (accidents, certain agricultural activities, mining, highway deicing, acid rain, improper well construction and maintenance, road salt).

Cabazon's AWS Gold certification is reflective of the facility's meeting of advanced - level criteria, including the site's positive contribution to the local groundwater system, best practice of the site's water balance, best practice of the site's water quality, and implementation of a water education program, among others.

Elevated levels of radium have been found in groundwater samples from shallow monitoring wells on the Bethpage High School campus and the state DEC plans to take more samples and scan field and soil areas there for more radioactive elements.

«Our results show that even among baseline groundwater samples collected near existing gas wells, there is no evidence of systematic increased dissolved methane concentrations closer to oil / gas wells.

Combined, the results of all four statistical approaches yield a defensible, compelling argument that there is no significant correlation between dissolved methane concentrations in groundwater and proximity to nearby oil / gas wells.»

The well - drilling unit played a key role in the county's groundwater investigation that forced the U.S. Navy to step up efforts to clean up a groundwater plume contaminated with high concentrations of «volatile organic compounds» beneath the former Grumman weapons facility in Calverton.

The proposed budget also includes funding to fast - track construction of wells to contain and treat groundwater contamination traced to a site where the U.S. Navy and what is now Northrop Grumman ran manufacturing, research and testing operations in Bethpage decades ago.

Foes of a New York City plan to study reopening dozens of dormant groundwater wells in Southeastern Queens urged the plan's postponement to make sure Long Island's water supply wouldn't be jeopardized.

This was based on results from samples from Entergy's groundwater monitoring program taken January 26 that identified elevated levels of tritium in three monitoring wells out of several dozen.

Testing wells have revealed a not especially dangerous but still unsettling tritium spill into the groundwater beneath Indian Point, the three - reactor nuclear - power plant 35 miles north of New York City.

Its own water tests, done as a result of Hickey's discovery, included results that showed levels of PFOA at 18,000 ppt in the groundwater under its McCaffrey Street plant — several hundred yards from the village's well fields.

Being a good steward of groundwater just makes sense.

Across the nation, concern over contamination has risen in places like Seattle, where the city recently sued the agribusiness giant Monsanto over chemical pollution in the Duwamish River, and in Minnesota, where a state report issued last week found that up to 60 percent of groundwater samples from wells in the central part of the state had unsafe levels of nitrates.

Comparing the relative abundance of these carbon isotopes in the various wells, the researchers discovered that over half of wells more than 250 meters deep yielded mostly groundwater at least 12,000 years old.

Scientists typically monitor groundwater reserves using wells, but this method fails to provide the global picture of how water levels are changing.

DEEP WATER Deep groundwater wells, such as this hand - pumped well in Uganda being operated by water resources scientist Scott Jasechko, can contain mixes of old and young water and traces of pollution.

The deeper the well, the more likely it is to contain a larger share of «fossil» groundwater that's at least 12,000 years old.

No matter where the young water comes from, the new technique for identifying the percentage of fossil groundwater in a well could be an important tool for communities, says Audrey Sawyer, a hydrogeologist at Ohio State University in Columbus.

A two - year study of fracking wells in Los Angeles, conducted by consultants Cardno Entrix and funded by the oil industry, monitored 15 environmental factors before and after fracking, including groundwater chemistry, vibration at the surface and at depth, and methane release.

EnCana bought many of the wells in 2004, after the first problems with groundwater contamination had been reported.

Because of such concerns the U.S. Department of Energy has convened a special task force to improve the safety and environmental impacts of such fracking for natural gas, including how best to dispose of the voluminous wastewater as well as ensuring proper sealing of wells to prevent such groundwater contamination.

Year after year, as the rivers and streams have dwindled, the state's Department of Water Resources, which requires permits, has continued to issue them, allowing new groundwater wells, and not counting their withdrawals as part of a single system.

For example, Las Vegas and a smattering of rural and tribal communities draw groundwater from wells and springs northeast of the city.

The pumping of groundwater, by contrast, has been left largely unregulated for the better part of the past century across California and parts of Arizona.

He estimates that the wells in Needles draw an average of about 700 million gallons of groundwater annually that, in truth, ultimately comes from the Colorado River.

David Roberts oversees water rights and policy for the Salt River Project, one of the state's largest public water and power utilities, which is suing landowners over their groundwater wells.

«Sociological studies are imperative for understanding the mindsets of well owners, who are a distinct group of Kansans who will continue to influence the availability of groundwater,» Ternes said.

Kansans who own water wells show more awareness of state water policy issues than those who rely on municipal water supplies, according to a study that could have implications for groundwater management and environmental policies.

A new study links elevated levels of methane and other gases in groundwater to nearby hydraulic fracturing wells on the Marcellus shale, and suggests the problem lies in poorly designed well casings

Over the lifespan of a gas station, Hilpert says, concrete pads underneath the pumps can accumulate significant amounts of gasoline, which can eventually penetrate the concrete and escape into underlying soil and groundwater, potentially impacting the health of those who use wells as a water source.

Overall, pesticides were less common in so - called groundwater, such as that in wells, although 33 percent of deep wells that tap aquifers contained one or more of the chemicals.

For example, Jakarta's consumption of groundwater for industry and domestic use has been so high that sea water has infiltrated shallow wells as far as 10 kilometres inland.

«The groundwater - based water was not as well liked as IDR or bottled water,» said Mary Gauvain, a professor of psychology at UC Riverside and co-author of the study.

«It's fair to assume that there's going to be another drought, and fair to assume that there will be usage of groundwater in that drought too; the wells are already there,» Lettenmaier said.

Pere Masqué, also co-author of the study, adds that, «in addition to nutrients, SGD can play a crucial role as a source of other dissolved compounds flowing into the Mediterranean Sea, as well as in all the oceans worldwide, such as carbon, iron and other micronutrients, given the magnitude of the calculated fluxes and the high concentration of these compounds in groundwater.»

Ewing's Russian colleagues, led by Alexander Novikov of the Russian Academy of Sciences, sampled the groundwater taken from wells up to four kilometers from the scene of original contamination, where radioactivity levels reach roughly 1,000 becquerels (nuclei decaying per second) per liter.

As part of a search for the cause, geologic tests revealed large deposits of arsenic - rich minerals steadily leaching into groundwater, causing levels in many wells to top 500 ppb.

In northern India, tens of millions of bore wells are depleting groundwater much faster than it can replenish, just as in China.

The companies inject this wastewater into wells to dispose of it, which raises the groundwater pressure and can stress geologic faults.

With more than 17 million Americans now living within one mile of an oil and gas well, there is concern about the possible contamination of surface and groundwater by trace metals, radioactive isotopes and other inorganic compounds released in these areas, they point out.

They will require drilling companies to encase their wells in cement through vulnerable areas where they could leak into groundwater, and will require testing of that cement to ensure it is properly in place.

Yet in addition to extinctions there are many dramatic, well - documented effects of introduced species, such as shifts in regional climate, reduced groundwater levels, altered nutrient cycling, and reduced oxygen levels in aquatic systems, which affect the abundance and distribution of native species.

Gido, Perkin and their colleagues at the U.S. Geological Survey, Colorado State University, Colorado Parks and Wildlife, Westar Energy and The Nature Conservancy used groundwater well data from the 1950s to 2010 to track the rate of change in the water table of the High Plains Aquifer.