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- By CategoryMixed GasesGas Comp 3HELIUMGas Comp Amount235.0000000 99.9725000 99.9550000 22.0000000 79.2000000 83.0000000 66.0000000 99.8000000 99.8900000 99.9200000Gas Comp 2PPB FORMALDEHYDE CYCLOHEXENE NITROGEN AIR PPM HYDROGEN SULFIDE