Air Monitoring Presented By: Etech Environmental & Safety Solutions, Inc.
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Transcript of Air Monitoring Presented By: Etech Environmental & Safety Solutions, Inc.
Air MonitoringAir Monitoring
Presented By: Etech Environmental & Safety Solutions, Inc.Presented By: Etech Environmental & Safety Solutions, Inc.
Field Air Monitoring Field Air Monitoring InstrumentsInstruments Collection of “Real Time” data to aid Collection of “Real Time” data to aid
in the decisions concerningin the decisions concerning
– Hazards & Risks to Public & PersonnelHazards & Risks to Public & Personnel
– Selection of Personal Protective Selection of Personal Protective EquipmentEquipment
– Site Work ZonesSite Work Zones
– Effects on EnvironmentEffects on Environment
– Mitigative ActionsMitigative Actions
Field InstrumentsField InstrumentsDesired CharacteristicsDesired Characteristics Portable & RuggedPortable & Rugged
Easy to OperateEasy to Operate
Inherently SafeInherently Safe
Reliable & Useful ResultsReliable & Useful Results
Reliable & Useful Reliable & Useful ResultsResults Response TimeResponse Time
SensitivitySensitivity
SelectivitySelectivity
AccuracyAccuracy
PrecisionPrecision
Hazardous Hazardous Atmospheres (NEC)Atmospheres (NEC) Concentration between the Lower Concentration between the Lower
Explosive Limit and Upper Explosive Limit and Upper Explosive Limit (LEL – UEL)Explosive Limit (LEL – UEL)
Presence of an Ignition SourcePresence of an Ignition Source
Exothermic ReactionExothermic Reaction
DefinitionsDefinitions
Intrinsically SafeIntrinsically Safe - Designed so that parts - Designed so that parts are not exposed to explosive atmosphere are not exposed to explosive atmosphere or, if so, there is insufficient energy for or, if so, there is insufficient energy for ignitionignition
Explosion ProofExplosion Proof – Designed to contain an – Designed to contain an explosion and cool gases to prevent explosion and cool gases to prevent spreadspread
Purged SystemPurged System – Inert gas filled system; – Inert gas filled system; positive pressure to prevent explosive positive pressure to prevent explosive gases or vapors from enteringgases or vapors from entering
Instrument Protection Instrument Protection CriteriaCriteria Class I, Division 1, Group A,B,C, & DClass I, Division 1, Group A,B,C, & D
– Intrinsically SafeIntrinsically Safe– Explosion-ProofExplosion-Proof– Purged SystemPurged System
Class I, Division 2, Groups A,B,C, & DClass I, Division 2, Groups A,B,C, & D– Non-IncendiveNon-Incendive
Class II, Division 1 & 2, Groups E,FD, & GClass II, Division 1 & 2, Groups E,FD, & G– Dust-Ignition ProofDust-Ignition Proof
Typical Instruments Typical Instruments UsedUsed Oxygen IndicatorsOxygen Indicators
Combustible Gas IndicatorsCombustible Gas Indicators
Toxic Atmosphere MonitorsToxic Atmosphere Monitors
Radiation Survey MetersRadiation Survey Meters
Oxygen IndicatorsOxygen Indicators
Exterior SensorExterior Sensor
Interior SensorInterior Sensor– Manual PumpManual Pump– Automatic PumpAutomatic Pump
Combination Combination UnitsUnits
Oxygen Indicators Oxygen Indicators (cont.)(cont.) Limitations & PrecautionsLimitations & Precautions
– Atmospheric Pressure (Altitude)Atmospheric Pressure (Altitude)
– Interfering GasesInterfering Gases
– Operating TemperatureOperating Temperature
Combustible Gas Combustible Gas IndicatorsIndicators Manual vs. Manual vs.
AutomaticAutomatic
Super-Sensitive Super-Sensitive UnitUnit
Combination Combination Units (CGI-OUnits (CGI-O22))
Combustible Gas Combustible Gas Indicators (cont.)Indicators (cont.) Limitations & PrecautionsLimitations & Precautions
– TemperatureTemperature
– Oxygen RequirementsOxygen Requirements
– Interfering GasesInterfering Gases LeadLead SulphurSulphur SiliconeSilicone Hydrogen ChlorideHydrogen Chloride Hydrogen FluorideHydrogen Fluoride
– Relative ResponseRelative Response
Combustible Gas Combustible Gas Indicators (cont.)Indicators (cont.)
Always monitor for Oxygen levels Always monitor for Oxygen levels before checking for combustible before checking for combustible
gasesgases
Toxic Atmosphere Toxic Atmosphere MonitorsMonitors Detector Tube SystemsDetector Tube Systems
Specific AgentSpecific Agent– HH22SS
– COCO
Total Vapor AnalyzersTotal Vapor Analyzers– Photoionization Detectors (PIDs)Photoionization Detectors (PIDs)– Flameionization Detectors (FIDs)Flameionization Detectors (FIDs)
Detector Tube SystemsDetector Tube Systems
PumpPump– BellowsBellows– PistonPiston
TubesTubes– Specific ChemicalsSpecific Chemicals– General ChemicalsGeneral Chemicals– Concentration Concentration
RangesRanges
Detector Tube SystemsDetector Tube Systems (cont.) (cont.)
Limitations & PrecautionsLimitations & Precautions– AccuracyAccuracy– Temperature, Humidity, PressureTemperature, Humidity, Pressure– Expiration DateExpiration Date– Lot NumbersLot Numbers– Color Change EndpointColor Change Endpoint– Pump Strokes, VolumePump Strokes, Volume– InterferencesInterferences– ReusableReusable
Toxic Vapor AnalyzersToxic Vapor AnalyzersPIDsPIDs UsesUses
– Analyze for a Analyze for a broad range of broad range of contaminantscontaminants
– Can be calibrated Can be calibrated to analyze for to analyze for specific specific chemicalschemicals
– SensitivitySensitivity
Toxic Vapor AnalyzersToxic Vapor AnalyzersPIDs (cont.)PIDs (cont.)
ConsiderationsConsiderations– Lamp Energy & Chemical IPLamp Energy & Chemical IP– Dust & HumidityDust & Humidity– High MethaneHigh Methane– Electromagnetic RadiationElectromagnetic Radiation– Lamp AgingLamp Aging– Relative ResponseRelative Response– High ConcentrationsHigh Concentrations
Toxic Vapor AnalyzersToxic Vapor AnalyzersFIDsFIDs
UsesUses
– Accuracy to Accuracy to specific specific hydrocarbonshydrocarbons
– Data is usually Data is usually very accuratevery accurate
Toxic Vapor AnalyzersToxic Vapor AnalyzersFIDs (cont.)FIDs (cont.) ConsiderationsConsiderations
– Detects only organicsDetects only organics
– Sensitive to methaneSensitive to methane
– Relative responseRelative response
– Hydrogen gas neededHydrogen gas needed
– Electromagnetic RadiationElectromagnetic Radiation
Toxic Vapor AnalyzersToxic Vapor AnalyzersChemical SpecificChemical Specific UsesUses
– Good for personal Good for personal monitors in monitors in known known atmospheresatmospheres
– AccuracyAccuracy
Toxic Vapor AnalyzersToxic Vapor AnalyzersChemical Specific Chemical Specific (cont.)(cont.) ConsiderationsConsiderations
– Sensor WearSensor Wear
– Dust & HumidityDust & Humidity
– UnknownsUnknowns
– CalibrationCalibration
– Electromagnetic RadiationElectromagnetic Radiation