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Federal News

President Declares Disaster for New York State

FEMA Press Releases - Mon, 12/22/2014 - 16:20

WASHINGTON, D.C. – The U.S. Department of Homeland Security's Federal Emergency Management Agency announced that federal disaster aid has been made available to the state of New York to supplement state, local and tribal recovery efforts in the area affected by a severe winter storm, snowstorm, and flooding during the period of November 17-26, 2014.

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Categories: Federal News

Disaster Assistance Tops $30 Million for South Napa Earthquake

FEMA Press Releases - Mon, 12/22/2014 - 15:46

SACRAMENTO, Calif. – State and federal disaster assistance now totals more than $30 million for people and businesses affected by the South Napa Earthquake. The current total includes $8.8 million in grants from the Federal Emergency Management Agency (FEMA) and the California Governor’s Office of Emergency Services (Cal OES), as well as $21.2 million in low-interest disaster loans from the U.S. Small Business Administration (SBA).

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Categories: Federal News

One Week Left to Apply for South Napa Earthquake Disaster Assistance

FEMA Press Releases - Mon, 12/22/2014 - 15:09

SACRAMENTO, Calif. – Individuals and business owners in Napa and Solano counties who had damages or losses as a result of the South Napa Earthquake have one week left to register for disaster assistance with the Federal Emergency Management Agency (FEMA).

Officials with FEMA and the California Governor’s Office of Emergency Services (Cal OES) urge anyone who still needs help to register before the deadline – Dec. 29, 2014.

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Categories: Federal News

Advances in Dating Groundwater

USGS Newsroom Technical - Fri, 12/19/2014 - 10:40
Summary: Groundwater chemists and hydrologists are keenly interested in expanding the knowledge of environmental tracers that can be used to determine groundwater age. The age of groundwater is a valuable parameter that serves to inform many types of groundwater availability studies.

Contact Information:

Jon Campbell ( Phone: 703-648-4180 ); Karl Haase ( Phone: 703-648-5818 );



Groundwater chemists and hydrologists are keenly interested in expanding the knowledge of environmental tracers that can be used to determine groundwater age. The age of groundwater is a valuable parameter that serves to inform many types of groundwater availability studies.

Many environmental tracers — such as chlorofluorocarbons (CFCs), SF6, and tritium — are of atmospheric origin. However, there are several classes of atmospheric trace gases whose application as groundwater age tracers have not been fully explored. Hydrofluorocarbons and hydrochlorofluorocarbons (HFCs and HCFCs) are among them.

USGS scientists have recently developed a high-sensitivity technique to measure two of these compounds (HCFC-22 and HFC-134a) in groundwater and the unsaturated zone.

The investigators found that, contrary to many simpler laboratory studies, these compounds can be degraded by bacteria in the environment. Consequently, both classes of compound (HFCs and HCFCs) are not likely to be useful for dating groundwater. Since they are depleted in the unsaturated zone, this reduction implies a weak environmental sink (a few percent or less) that has not been previously discussed.

The study by USGS hydrologists Haase, Busenberg, Plummer, Casile, and Sanford has been published in the journal Chemical Geology.

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Professional paper

USGS Groundwater Dating Lab

USGS Groundwater Information