Program Objectives
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Transcript of Program Objectives
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Program Objectives
Define “Decontamination”.
Identify the steps in the decon process.
Demonstrate, by building, a decontamination reduction zone.
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DecontaminationDecontamination
The process of removing or neutralizing contaminants that have accumulated on personnel or equipment.
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Exposure versus Contamination
Exposure:
The subjection of a person to a toxic substance or harmful physical agent through any route of entry.
Common cold, TB
Contamination:
The transfer of a hazardous material to persons, equipment, and the environment in greater than acceptable quantities.
Alpha particle, splash
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Types of Contamination
2. Permeation
1. Surface contaminates
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Five Factors which affect the extent of permeationFive Factors which affect the extent of permeation
Contact TimeConcentrationTemperatureSize of contaminant vs. pore spacePhysical State of Waste or Haz-Mat
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Prevention of ContaminationPrevention of Contamination
Establish Standard Operation Procedures (SOPs) to minimize contact with hazardous materials. Stress “Clean” work practices.
Use disposable outer garments when appropriate.Use remote sampling, handling, and container opening techniques.Protect monitoring instruments with bags
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Emergency Decontamination
The physical process of immediately removing dangerous contaminates from individuals.
Very rapid, gross decon. Remove clothes, wash with available water, cover, treatment/transport.
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Decontamination PlanDecontamination Plan
Determine the number and layout of the Decon stations.Determine equipment and materials needed to effectively remove contaminants
Determine the appropriate Decon solution(s).Establish procedures to prevent contamination of clean areas.
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Decontamination Plan (cont’d.)Decontamination Plan (cont’d.)
Minimize worker contact with contaminants during removal of PPE.Establish proper disposal of contaminated materials.
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DECONTAMINATION METHODS ABSORPTION ADSORPTION CHEMICAL DEGRADATION DILUTION DISPOSAL ISOLATION NEUTRALIZATION SOLIDIFICATION
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Testing the Effectiveness of the Decontamination ProcessTesting the Effectiveness of the Decontamination Process
Visual Observation
Wipe Sampling
Cleaning Solution Analysis
Testing for Permeation
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Decontamination Facility Design Decontamination Facility Design
The level and type of Decon depends on several site-specific factors:
The physical, chemical, and toxicological properties of the contaminantThe amount, location, and containment of the released contaminantThe movement of personnel and equipment among different zones
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Exclusion
Decontamination ZonesDecontamination Zones
CRZ
Support
Exclusion
There should be three zones when responding to chemical emergencies.
Exclusion, Contamination Reduction, and Support
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HazMat Zones
Hot
Wind/Grade
Warm
Cold
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Contamination ReductionZone
Wind/Grade
Entry
PoolPool
ToolDrop
DrumDrum
Exit
SuitRemoval
Medcheck
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