Decontamination
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Decontamination. Instructional Goal understand the purpose and principles of decon see the potential for work-related exposure during decon demonstrate decon principle is the field. Decontamination is . . .

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Decontamination

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Decontamination

Decontamination

Instructional Goal

  • understand the purpose and principles of decon

  • see the potential for work-related exposure during decon

  • demonstrate decon principle is the field


Decontamination is

Decontamination is . . .

process of removing or neutralizing contaminants that have accumulated on personnel and equipment


Why decon

Why Decon?

  • Protect personnel by reducing the transfer of harmful materials into clean areas;

  • Helps prevent mixing of incompatible chemicals;

  • Protects the community by preventing uncontrolled transportation of contaminants from the site.


Decontamination plan

Decontamination Plan

  • Establish methods and procedures

  • Determine appropriate decon methods

  • Determine number and layout of decon stations

  • Establish procedures to prevent contamination of clean areas

  • Determine decon equipment needed

  • Establish methods for disposing of clothing and equipment


S o ps for decontamination

S O Ps for Decontamination

Minimize contact with waste

  • Stay out of the contaminant

  • Use remote sampling

  • Protect equipment

  • Wear disposable outer garments

  • Use disposable equipment when possible

  • Encase contaminant sources


S o ps for decontamination maximize worker protection

S O Ps for DecontaminationMaximize Worker Protection

  • Check PPE before use

  • Proper dressout procedures

  • Training and retraining


Decontamination1

Decontamination

Maximize Worker Protection

Fasten all fasteners

&

Seal all gaps


Levels of contamination

Levels of Contamination

  • Surface - easy to detect and remove

  • Permeation

    • Contact time

    • Concentration

    • Temperature

    • Size of molecules and pore space

    • Physical state of waste


Key questions

Key Questions

Is the decon method effective for the specific substances present?

Does the method itself pose any health or safety hazards?


Decontamination methods isolation dry decon

Hazardous

Waste

Decontamination Methods Isolation-Dry Decon

Contaminants end up in the Bag

“Bag and Stash”


Decontamination methods physical removal

Decontamination Methods Physical Removal

  • Loose contaminants

  • Adhering contaminants

    • Solidification

    • Rinsing

  • Volatile Liquids


Decontamination methods chemical removal

Decontamination Methods Chemical Removal

  • Dissolving Contaminants

  • Surfactants

  • Neutralizers

  • Disinfection / Sterilization


Testing for effectiveness

Testing for Effectiveness

  • Visual Observation

    • Natural & UV Light

  • Wipe Sampling

  • Cleaning Solution Analysis

  • Testing for Permeation


Health and safety hazards of decontamination

Health and Safety Hazards of Decontamination

  • Consider compatibility of decon solutions or other decon materials BEFORE use

  • Consider the effect of the decon method on decon personnel and workers BEFORE use


Decon facility design

Decon Facility Design

  • Depends on site-specific factors

  • Provides an organized process to reduce levels of contamination

  • Flow patterns and separate stations


Decontamination disposal methods

DecontaminationDisposal Methods

All equipment and materials used for decontamination must be decontaminated or disposed of properly


Decontamination personal protection

DecontaminationPersonal Protection

Decon workers stationed closest to the Exclusion Zone need more PPE than decon workers stationed near the Support Zone


Basic 6 step decon line

Basic 6 - Step Decon Line

1) Equipment Drop

2) Gross Decon - wash / rinse boots & gloves

3)Air Tank Change

4)Boots, gloves, & outer garment off

5)SCBA Facepiece Removal

6)Field Wash


Decontamination

ENTER

EQUIPMENT

DROP

1

HOT ZONE

SHOWER

STALL

Field wash

boots and

CPC

2

5 GAL

PAIL WITH

WASHWATER

SPARE

AIR

TANKS

Get full air tank

and return

3

RETURN

WITH

NEW AIR

TANK

Bag for

SCBA

OR

Drop SCBA

Leave SCBA facepiece on

Bag

55-85

gallon

4

Step into

bag and

peel CPC off

and into bag

Drum for

bagged

CPC

DIRTY

SIDE

CLEAN

SIDE

Tub for

SCBA

facepiece

Remove SCBA

facepiece and

inner gloves

5

Wash face

and hands

6

SUPPORT ZONE

Tub with washwater

and towel


Decontamination emergency decontamination

Decontamination Emergency Decontamination

  • Procedures must be established

  • Stabilize first or decon first???

  • Protect medical personnel

  • Dispose of contaminated stuff


Decontamination

Accident or Injury

Life-saving

Procedures

Required?

Yes

Contaminants Hazardous?

Yes

No

No

Grossly Decontaminate

or Cover

or Wrap

Contaminated Areas!

Perform Life-Saving

Procedures!

Decontaminate as

much as possible!

Additional

Emergency Care

Needed?

No

Further Medical

Attention or

Surveillance

Needed?

Yes

No

Report to

Safety Officer!

Yes

Transport to

Medical facility!


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