This is a collection of drill stem test observations - compiled by the Illinois State Geological Survey and published as a Web feature service for the National Geothermal Data System by the AZGS. Fields in the data table include: ObservationURI, WellHeaderURI, WellName , APINo, OtherID, DSTName, Description, TestType, DSTOperator, DSTDateTime, DTNumber, Field, County, State, PLSS_Meridians, TWP, RGE, Section, SectionPart, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, DSTTargetFormation, TargetFeatureURI, DepthTopOpenZone, ElevationOpenZone_msl, DepthBottomOpenZone, UnitsOfMeasure, DepthReferencePoint, FormationTD, HoleDiameter_in, CasingThickness_in, DrillPipeLength, DrillPipeInternalDiameter_in, FlowHistory, PressureInitialShutIn, PreferredPressure, PressureFinalShutIn, ShutInPressureMethod, Units_Pressure, HydrostaticPressure, HydrostaticPressureMethod, FlowPressureMin, FlowPressureMax, FlowPressureMethod, TimeInitialShutIn_min, TimeFinalShutIn_min, FormationTemperature, TemperatureCorrection, TemperatureFlowing, Units_Temperature, RelatedResource and InformationSource.