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Ohio Hazmat & WMD Technician

Ohio Hazmat & WMD Technician. Module 1 Unit 2 Field Survey Instruments. Learning Objectives. At the end of this training each student will demonstrate knowledge and the ability to classify, identify, and verify known and unknown chemicals by using field survey instruments.

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Ohio Hazmat & WMD Technician

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  1. OhioHazmat & WMD Technician Module 1 Unit 2 Field Survey Instruments

  2. Learning Objectives At the end of this training each student will demonstrate knowledge and the ability to classify, identify, and verify known and unknown chemicals by using field survey instruments.

  3. Student Performance Objectives • Know the 9 DOT Hazard Classes • Know the 3 classes and 2 divisions of inherent safety tested instruments • Know the 6 types of direct reading instruments and give examples of each type.

  4. Student Performance Objectives (cont.) • Demonstrate their ability to operate at least 4 different direct reading instruments • Must be able to successfully complete competency evaluations 005, 006, 007, 008, 009, 010, 011, 014, 016, 017, and/or 018

  5. DOT Hazard Classes 1 Explosives 2 Compressed gasses 3 Flammable liquids 4 Flam solids, spontaneous combustible, dangerous when wet 5 Oxidizers and organic peroxides

  6. DOT Hazard Classes (cont.) 6 Toxic, biological 7 Radiological 8 Corrosives 9 Misc. (ORM)

  7. Real Time Air Monitors • Assessing health risks • PPE • Work zones • Dispersion • Mitigation actions

  8. Characteristics of Air Monitoring Instruments • Portable and rugged • Easy to operate • Inherently safe • Reliable and useful results

  9. Inherently Safe • Class I, II and III • Division 1 and 2

  10. Characteristics of Air Monitoring Instruments (cont.) • Reliable and useful results • Response time • Sensitivity • Amplification • Accuracy • Precision • Selectivity • Calibration and relative response

  11. Types of Direct reading instruments • Corrosive gas • Oxygen • Flammability • Toxic • Radiological • Specialized

  12. Corrosive Gas • pH paper

  13. Oxygen • Normal air–20.9% oxygen • Oxygen levels less than 19.5% • Oxygen levels above 23.5% • Some instruments require sufficient oxygen for operation

  14. (-) Schematic of Oxygen Sensor O2 O2 O2 O2 Membrane (+) Electrode Meter Face Electrolyte Solution (KCL or KOH)

  15. Limitations and Considerations • Atmospheric pressure • Temperature

  16. Combustible-Atmosphere Indicators • Combustible Gas Indicators (CGI) • Concentration of a flammable vapor or gas in the air • Percentage of the LEL

  17. Flammable Range

  18. WHEATSTONE BRIDGE Principle of Operation • Wheatstone Bridge

  19. Limitations • Temperature • Lack of oxygen • Lead vapors and silicon compounds • Response factors

  20. Relative Response for a Combustible Gas

  21. Toxic-Atmosphere Monitors • Identify airborne concentrations • Evaluate risk • Determine the need and type of PPE • Establish work zones • PPM

  22. Radiological • Survey meters • Contamination • Dose & Rate • Max dose for: • Life safety - 50,000mrem • Protecting critical property - 10,000mrem • Emergency worker - 5000mrem

  23. Specialized Monitoring Devices 1) Biological immunoassay indicators 2) Chemical Agent Monitors 3) Colorimetric indicators 4) Combustible Gas Indicators 5) DNA Fluoroscopy 6) Electro chemical cells 7) Flame Ionizing detector 8) Gas chromatograph/mass spectrometer 9) Infrared Spectroscopy 10) Ion mobility spectroscopy 11) Mass channel analyzer 12) Metal oxide sensor 13) Photo ionization detector 14) Polymerase chain reaction 15) Radiation detection and measurement instruments 16) Raman spectroscopy 17) Surface acoustical wave 18) Wet chemistry • NFPA’s list of 18

  24. Colorimetric Tubes • Glass tube with an indicating chemical • Tube is connected to a pump • Contaminant reacts with the indicator • Chemical-specific

  25. Limitations and Considerations (cont.) • Poor accuracy and precision • Affected by temperature • Store tubes at moderate temperatures • Humidity • Shelf life

  26. Limitations and Considerations (cont.) • Interfering compounds • Difficult to read • Sampling times

  27. Photoionization Detector (PID) • Detect concentrations of gases and vapors in PPM • Fan or pump draws the air into the detector • Contaminants are exposed to a high-frequency radiation light source

  28. Chemical Ionization Potential (eV) Hydrogen cyanide Carbon dioxide Methane Hydrogen chloride Water Oxygen Chlorine Propane Hydrogen sulfide Hexane Ammonia Vinyl chloride Acetone Benzene Phenol Ethyl amine 13.9 13.8 13.0 12.5 12.6 12.1 11.5 11.1 10.5 10.2 10.1 10.0 9.7 9.2 8.5 8.0 Ionization Potential

  29. M8 M9 M256A1 ICAM APD2000 SAW Mincad GC/MS Biological detection and ID Specialized for WMD

  30. Exercise Module 1 Unit 2Air Monitors Time Allotted: 60 minutes Equipment needed: (2) 4 gas air monitors P.I.D. pH paper Calibration gas Supplies needed: Acetone Acetic Acid (vinegar) Hydrochloric Acid (The Works toilet bowl cleaner) Ammonia (window cleaner) 4 small containers with lids or covers Calibration Gas Methodology: The instructor will give you a scenario that is based on the student performance objectives in this unit.

  31. Unit 2 Quiz

  32. Questions

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