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GML Projects at Grifton, North Carolina

Parameter	Formula	First Sample Date	Status
Carbon Dioxide	CO₂	1992-07-30	Terminated - 1999-06-09
Methane	CH₄	1992-07-30	Terminated - 1999-06-09
Carbon Monoxide	CO	1992-07-30	Terminated - 1999-06-09
Molecular Hydrogen	H₂	1992-07-30	Terminated - 1999-06-09
Nitrous Oxide	N₂O	1996-03-06	Terminated - 1999-06-09
Sulfur Hexafluoride	SF₆	1996-03-06	Terminated - 1999-06-09
Carbon-13/Carbon-12 in Carbon Dioxide	d¹³C (CO₂)	1992-07-30	Terminated - 1999-06-09
Oxygen-18/Oxygen-16 in Carbon Dioxide	d¹⁸O (CO₂)	1992-07-30	Terminated - 1999-06-09