1 / 22

Air Monitoring

Air Monitoring. Presented By: Etech Environmental & Safety Solutions, Inc. Field Air Monitoring Instruments. Collection of “Real Time” data to aid in the decisions concerning Hazards & Risks to Public & Personnel Selection of Personal Protective Equipment Site Work Zones

tyra
Download Presentation

Air Monitoring

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Air Monitoring Presented By: Etech Environmental & Safety Solutions, Inc.

  2. Field Air Monitoring Instruments • Collection of “Real Time” data to aid in the decisions concerning • Hazards & Risks to Public & Personnel • Selection of Personal Protective Equipment • Site Work Zones • Effects on Environment • Mitigative Actions

  3. Field InstrumentsDesired Characteristics • Portable & Rugged • Easy to Operate • Inherently Safe • Reliable & Useful Results

  4. Reliable & Useful Results • Response Time • Sensitivity • Selectivity • Accuracy • Precision

  5. Hazardous Atmospheres (NEC) • Concentration between the Lower Explosive Limit and Upper Explosive Limit (LEL – UEL) • Presence of an Ignition Source • Exothermic Reaction

  6. Definitions • Intrinsically Safe - Designed so that parts are not exposed to explosive atmosphere or, if so, there is insufficient energy for ignition • Explosion Proof – Designed to contain an explosion and cool gases to prevent spread • Purged System – Inert gas filled system; positive pressure to prevent explosive gases or vapors from entering

  7. Instrument Protection Criteria • Class I, Division 1, Group A,B,C, & D • Intrinsically Safe • Explosion-Proof • Purged System • Class I, Division 2, Groups A,B,C, & D • Non-Incendive • Class II, Division 1 & 2, Groups E,FD, & G • Dust-Ignition Proof

  8. Typical Instruments Used • Oxygen Indicators • Combustible Gas Indicators • Toxic Atmosphere Monitors • Radiation Survey Meters

  9. Oxygen Indicators • Exterior Sensor • Interior Sensor • Manual Pump • Automatic Pump • Combination Units

  10. Oxygen Indicators (cont.) • Limitations & Precautions • Atmospheric Pressure (Altitude) • Interfering Gases • Operating Temperature

  11. Combustible Gas Indicators • Manual vs. Automatic • Super-Sensitive Unit • Combination Units (CGI-O2)

  12. Combustible Gas Indicators (cont.) • Limitations & Precautions • Temperature • Oxygen Requirements • Interfering Gases • Lead • Sulphur • Silicone • Hydrogen Chloride • Hydrogen Fluoride • Relative Response

  13. Combustible Gas Indicators (cont.) Always monitor for Oxygen levels before checking for combustible gases

  14. Toxic Atmosphere Monitors • Detector Tube Systems • Specific Agent • H2S • CO • Total Vapor Analyzers • Photoionization Detectors (PIDs) • Flameionization Detectors (FIDs)

  15. Detector Tube Systems • Pump • Bellows • Piston • Tubes • Specific Chemicals • General Chemicals • Concentration Ranges

  16. Detector Tube Systems (cont.) • Limitations & Precautions • Accuracy • Temperature, Humidity, Pressure • Expiration Date • Lot Numbers • Color Change Endpoint • Pump Strokes, Volume • Interferences • Reusable

  17. Toxic Vapor AnalyzersPIDs • Uses • Analyze for a broad range of contaminants • Can be calibrated to analyze for specific chemicals • Sensitivity

  18. Toxic Vapor AnalyzersPIDs (cont.) • Considerations • Lamp Energy & Chemical IP • Dust & Humidity • High Methane • Electromagnetic Radiation • Lamp Aging • Relative Response • High Concentrations

  19. Toxic Vapor AnalyzersFIDs • Uses • Accuracy to specific hydrocarbons • Data is usually very accurate

  20. Toxic Vapor AnalyzersFIDs (cont.) • Considerations • Detects only organics • Sensitive to methane • Relative response • Hydrogen gas needed • Electromagnetic Radiation

  21. Toxic Vapor AnalyzersChemical Specific • Uses • Good for personal monitors in known atmospheres • Accuracy

  22. Toxic Vapor AnalyzersChemical Specific (cont.) • Considerations • Sensor Wear • Dust & Humidity • Unknowns • Calibration • Electromagnetic Radiation

More Related