personal samplers instructional goal the participants will see the various methods used to collect...
TRANSCRIPT
Personal SamplersPersonal Samplers
Instructional Goal The participants will see the various methods used to collect personal samples and how that may impact them on the job.
Personal Sampling SystemsPersonal Sampling Systems
Active samplers
Passive samplers
Sampling TechniquesSampling Techniques
integrated samples are collected when the sensitivity of an analytical
method requires minimum sample periods or volumes,
when comparison must be made to an 8-hour, time-weighted average
threshold limit value (TLV) an OSHA permissible exposure limit
(PEL).
Active SamplersActive Samplers
Samplers mechanically collect samples on or into a selected medium. The medium is then analyzed in the laboratory to identify and quantify the contaminant(s) collected.
Active sampler systemActive sampler system Consists of the Following Components:
An electrically powered pump to move the contaminated air.
A sampler consisting of an appropriate sampling medium and a container designed for that medium.
Flexible, nonporous, inert tubing to link the sampler to the pump.
Passive SamplersPassive Samplers
Advantages of passive samplers is their simplicity calibration and maintenance are
reduced or eliminated Disadvantage
If direct read, errors may occur in observer interpretations.
Diffusion SamplersDiffusion Samplers
some can be read directly
example, colorimetric length-of-stain tubes
Others require laboratory analysis
Permeation SamplersPermeation Samplers can identify a single contaminant
within a mixture of airborne contaminants.
uses selective permeation of chemicals through a membrane
some are the direct reading type others require laboratory analysis.
Personal Sampler Personal Sampler ExamplesExamples
Radiation Dosimeters
Thermoluminescent Thermoluminescent DosimeterDosimeter
The TLD (Thermoluminescent Dosimeter) badges provide a permanent record of an individual's dose equivalent of beta, gamma, and x-ray radiation.
Direct-Reading Direct-Reading DosimetersDosimeters are pencil-type devices
that allow personnel to read and evaluate their exposures between TLD readings.
the Chirpy, which is a device that emits "chirps" based on the strength of the radiation field
The Digital DosimeterThe Digital Dosimeter
a battery-powered direct-reading instrument with a digital read-out in mR
Personal Sampling PlanPersonal Sampling Plan
must decide what to sample workers move around on the
work area workers perform a variety of
tasks must design efficient data
tracking system
DIFFICULTIESDIFFICULTIES
PELs ExceededPELs Exceeded
Sample workers who are known to be in the most highly exposed locations.
If the most hazardous locations have not been determined, sample all workers for a week.
Group workers by exposure levels.
Sample some members of each group every week.
Personal Monitoring is required and the following guidelines may be used.