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Figure F49. Headspace methane concentration, ethane concentration, and the ratios of methane to ethane (C1/C2), Holes C0012C, C0012D, C0012E, and C0012G. Methane and ethane are set at 0.0 when below detection. C1/C2 is set at 100,000 when ethane concentration is below detection. ppmv = parts per million by volume.

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