establishing similar exposure groups n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Establishing Similar Exposure Groups PowerPoint Presentation
Download Presentation
Establishing Similar Exposure Groups

Loading in 2 Seconds...

play fullscreen
1 / 19

Establishing Similar Exposure Groups - PowerPoint PPT Presentation


  • 152 Views
  • Uploaded on

Establishing Similar Exposure Groups. Lecture 4 . Why?. Not needed for OSHA compliance sampling So why do it? Represents best practice . The goal…. To assess the exposures and occupational health risks for all workers to all environmental agents on all days. The challenge…….

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Establishing Similar Exposure Groups' - nathan


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
establishing similar exposure groups

Establishing Similar Exposure Groups

Lecture 4

IH&S 725 Dr. Myers, C.I.H.

slide2
Why?
  • Not needed for OSHA compliance sampling
  • So why do it?
  • Represents best practice

IH&S 725 Dr. Myers C.I.H.

the goal
The goal…..
  • To assess the exposures and occupational health risks for all workers to all environmental agents on all days

IH&S 725 Dr. Myers C.I.H.

the challenge
The challenge……
  • Is to do it accurately and efficiently, despite the diversity of exposures across workers and across time.

IH&S 725 Dr. Myers C.I.H.

the how to
The how to…..
  • One strategy for meeting these challenges is to assemble workers, thought to have similar exposures, into a group
  • Qualitative or quantitative characterization of the exposure of one or a few in the group is then considered "representative" of the exposures of everyone in the group

IH&S 725 Dr. Myers C.I.H.

the benefit
The benefit….
  • Stratification of workers into "similar exposure groups" (SEGs) allows limited resources to be better used to characterize the many exposures that may be present in a particular workplace over different periods of time.

IH&S 725 Dr. Myers C.I.H.

the definition
The definition…..
  • Similar exposure group (SEG) are groups of workers having the same general exposure profile because of the similarity and frequency of the tasks that they perform, the materials and processes with which they work, and the similarity of the way that they perform the tasks

IH&S 725 Dr. Myers C.I.H.

two general methodologies for defining a seg
Two general methodologies for defining a SEG
  • Observational approach

IH&S 725 Dr. Myers C.I.H.

two general methodologies for defining a seg1
Two general methodologies for defining a SEG
  • Operational and sampling approach

IH&S 725 Dr. Myers C.I.H.

a workable approach to develop and use segs
A “workable approach” to develop and use SEGs
  • Use the observational approach as the primary, default approach to defining SEGs
  • Assess exposures for the SEGs formed by observation

IH&S 725 Dr. Myers C.I.H.

a workable approach to develop and use segs1
A “workable approach” to develop and use SEGs
  • Identify critical SEGs for which the consequences of misclassifying an individual worker's exposure are very severe
  • Use exposure monitoring and statistical analysis to check and refine critical SEGs using the sampling approach

IH&S 725 Dr. Myers C.I.H.

establishing similar exposure groups by observation
Establishing Similar Exposure Groups by Observation
  • Established by using the information gathered during the basic characterization of the workplace, workforce and exposure agent(s)
  • Observational approach allows the IH to make initial judgments about exposures to form SEGs and prioritize them for further action

IH&S 725 Dr. Myers C.I.H.

establishing similar exposure groups by observation1
Establishing Similar Exposure Groups by Observation
  • SEGs established by observation are generally described by…..

IH&S 725 Dr. Myers C.I.H.

hierarchical strategies for establishing segs by observation
Hierarchical strategies for establishing SEGs by observation
  • Classifying by process and exposure agent
  • Classifying by process, exposure agent, and job and/or task
  • Classifying work teams
  • Classifying non‑repetitive work

IH&S 725 Dr. Myers C.I.H.

establishing similar exposure groups by sampling
Establishing Similar Exposure Groups by Sampling
  • Measured exposure values are used to classify workers into SEGs
  • Workers grouped with a given amount of similarity and a given amount of confidence
  • Has the advantage of objectivity
  • Can be more accurate than classification by observation

IH&S 725 Dr. Myers C.I.H.

establishing similar exposure groups by sampling1
Establishing Similar Exposure Groups by Sampling
  • Good idea but……

IH&S 725 Dr. Myers C.I.H.

some summary thoughts
Some summary thoughts…..
  • SEGs are needed to efficiently assess the exposures for each and every worker, each and every day
  • SEGs are generally described by the following determinants

IH&S 725 Dr. Myers C.I.H.

some summary thoughts1
Some summary thoughts…..
  • An exposure assessment program will be forced by problem scope and limited resources to group workers into SEGs and prioritizing those SEGs for further information gathering or health hazard control
  • In doing so the industrial hygienist will accept the risk of possibly miss classifying some workers.

IH&S 725 Dr. Myers C.I.H.

some summary thoughts2
Some summary thoughts…..
  • As the exposure assessment and management system matures the IH can identify those SEGs where the risk posed by individual misclassification is a concern
  • Those critical SEGs can then be targeted for more extensive exposure monitoring using statistical analysis of the monitoring data to check the SEGs and re‑assign individuals as necessary.

IH&S 725 Dr. Myers C.I.H.