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Mohammad Tahir, Afghanistan Geological Survey, collects a ground-water sample for CFC age interpretation from Afghanistan, August 2004. (Use of plastic tubing for CFC sampling is not recommended).
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U.S. Geological Survey Hydrologist samples water from the Rio Grande, near Albuquerque, NM for chlorofluorocarbons January, 1997
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U.S. Geological Survey Hydrologists sample submerged well in Florida Bay, Florida, November 1997.
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Hydrologist with the Denmark Geological Survey collects a water sample for CFC analysis.
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U.S. Geological Survey Hydrologists sample a spring for CFCs in the Sandia Mountains East of Albuquerque, NM, July 1996.
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Connection to discharge from a domestic well shows splitting of water sample to 1/4" copper for CFCs (left) and teflon tubing for water chemistry (right)
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U.S. Geological Survey Hydrologists prepare to sample a spring in Shenandoah National Park, September, 1997.
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U.S. Geological Survey Hydrologist seals an ampoule for CFC analysis, in Shenandoah National Park, September, 1997.
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Photo showing CFC sampling apparatus and sealing of water sample in borosilicate ampoule. Sample is pumped from a submarine well in the Atlantic Shelf near Key Largo, Florida, November, 1997.
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U.S. Geological Survey hydrologist prepares to sample chlorofluorocarbons from a monitoring well in Albuquerque, NM
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Flame sealing a borosilicate ampoule for CFC Analysis
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U.S. Geological Survey Hydrologist collects water sample for CFC analysis, Shenandoah National Park, Virginia, April, 1996
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Tank of ultra pure nitrogen gas, regulator, and molecular sieve trap (aluminum foil)
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Bennett pump in peristaltic mode sampling backup from spring
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U.S. Geological Survey Hydrologist collects the first USGS water sample for CFC dating. Delmarva peninsula , May, 1989
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Unsaturated zone air is sampled from anlus of blowing domestic well, Southern Idaho. Pictured is pump (center) battery (right) pressurized canister (left)
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800 ft reel, air compressor, and generator used to sample deep wells in New Mexico
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The back of the sampling apparatus showing connection of valve to well using 1/4" aluminum tubing, and connection to ultra-pure nitrogen through 1/8" copper tubing.
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U.S. Geological Survey Hydrologist samples a production well in the Florida Aquifer near Valdosta, Georgia, 1991
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Front of apparatus and ampoule being sealed
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U.S. Geological Survey Hydrologist seals CFC ampoule from domestic well, Southern Idaho, July, 1996
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