Lewis was the sole bidder on the Olmos Block, named after the geologic formation straddling the border.

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During gasification, the carbon dioxide generated from the coal or other feedstock, like biofuels, is captured and then used to inject deep into the earth as part of oil recovery or otherwise sequestered in a geologic formation.

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Chevron determined the best place would be the Dupuy Formation, a geologic layer a mile beneath Barrow that contains a saline aquifer.

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