tert-Butyl AlcoholMethyl EthersGasolineBiodegradation, EnvironmentalAtmosphere Exposure ChambersWater Pollutants, ChemicalEthersPropaneBetaproteobacteriaHydroxybutyratesEthyl EthersGroundwaterBenzeneXylenesBenzene DerivativesPetroleum PollutionAir PollutantsSphingomonasBiotransformationBacteria, AerobicSolventsToxicity Tests, ChronicTolueneNontuberculous MycobacteriaCarboxylic AcidsCarbonAlkanesEnvironmental MonitoringSoil PollutantsHalf-LifeFresh WaterInhalation ExposureSkin AbsorptionGeologic SedimentsAerobiosisBreath TestsRNA, Ribosomal, 16SGallstonesCulture MediaBacteriaCholangiographyAdministration, InhalationMycobacteriumCarcinogensGas Chromatography-Mass SpectrometryWater SupplyWater MicrobiologyAnaerobiosisDNA, BacterialChromatography, GasGenes, rRNACalibrationCarbon IsotopesCarbohydrate MetabolismCaliforniaOxidation-ReductionSoil MicrobiologyGene Expression Regulation, BacterialRats, Inbred F344WaterRNA, BacterialDNA, Ribosomal