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Sampling gas at Kelseyville, California's Gas Hill

By California Volcano Observatory
Two USGS scientists wearing USGS shirts and baseball caps stand next to a rusting wellhead pipe and concrete well casing on a gravel field. One holds a gas analyzer with tubing; the other takes notes on a yellow clipboard. A green valley and low mountain ridges rise in the background under a clear blue sky.
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Detailed Description

USGS scientists Deb Bergfeld and Laura Clor collect samples of the gas from the old Gas Hill wellhead in Kelseyville, CA. USGS photo by Jen Lewicki.

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Public Domain.

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