HAAT TECHNICIAN DETECTION DEVICES

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This Hazmat Technician Level presentation discusses the different types of detection devices used on the scene by the responder. Reviews why monitoring is needed, types of detection devices, basic operations, calibration and accuracy, advantages and disadvantages of each type of detector, and problems encountered with each type of detector. Meets OSHA, NFPA, & EPA Training requirements. Presentation is over 90 slides in length.

Education

PREVIEW OF
HAZARDOUS MATERIALS
TECHNICIAN
DETECTION DEVICES-
INSTRUMENTATION
Brave Training Solutions
Copyright 2018
www.bravetraining.com
H15 V2

OBJECTIVES
You will be able to demonstrate
knowledge & the ability to identify,
classify, & verify known & unknown
compounds by using field survey
instruments

PERFORMANCE
OBJECTIVES
Know the DOT Hazard Classes
Know the types of direct reading
instruments & demonstrate their use

MONITORING WILL
Determine the density of the release
Determine the product involved
Provide real time data
Determine health & safety effects
Determine mitigation actions
Determine direction of dispersion

SAMPLING
In closed atmospheres some gases will
rise (natural gas) & some will sink
(propane)
Sampling tube needs to be raised or
lowered based upon the gas
Allow 1-2 seconds per foot of sample
tube for pumps to draw up sample
(up to 20 seconds)

TYPES OF INSTRUMENTS
Corrosive gas
Oxygen
Flammability
Toxic
Radiological
Specialized

CORROSIVE GAS
Simple as pH paper held over source
Photo by Fredrico Abranches Qunitaro

OXYGEN METERS
Based upon % oxygen in
atmosphere
Normally reads from 0 to
25% oxygen
Remember the oxygen level
for safe breathing
(20.9% normal &
19.5% is deficient)

OXYGEN METER
Certain gases, vapors, & oxidizers can
affect readings
CO2 levels above .5% can cause
damage to sensor

OXYGEN MONITORING
LEVELS
LEVEL AGENCY ACTION
<19.5% EPA Monitor with SCBA, CGI values are not
valid
19.5-25% EPA Continue monitoring with caution, SCBA
not needed based on oxygen content only
19.5-23.5% OSHA Continue to monitor
>25% EPA Explosion hazard, withdraw immediately
>23.5% OSHA Explosion hazard, withdraw immediately

DETECTOR TUBES
Consist of glass tube with an indicating
chemical
Can detect the presence
of a single gas or a
specific group of
gases
Some can detect the amount of a gas
Photo by Pete Southwood

FOR FURTHER INFORMATION
GO TO LINK BELOW
DETECTION DEVICES
FOR COMPLETE HAZMAT TECH SERIES
FOR SPANISH VERSION
FOR COMPLETE SPANISH HAZMAT
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