EP 1110-1-22
15 Sep 00
heating vent) is likely to suffer surface erosion. In addition, fibers released into an airstream may
be transported to other parts of the building, possibly exposing more people. Any planned
changes in building use should also be considered when assessing future potential fiber release.
B-6
Exposure Analysis
a.
An exposure analysis should be conducted prior to selecting an abatement
method. This analysis considers all descriptive and quantitative factors (related to material
condition, extent, etc.) compiled during the building asbestos survey and relates them to the
potential for occupant exposure to ACM. Prior to the conduct of an exposure analysis, the
Asbestos Management Team (AMT) should establish a written protocol that includes the
following:
(1)
A procedure for ranking, prioritizing, or rating the visual assessment
factors described previously in paragraph B-4.
(2)
Definitions of qualitative judgments, such as high exposure potential or
moderate damage.
(3)
The relative importance of quantitative data, such as bulk sampling results
or air sampling results described in PWTB 420-70-8, Chapter 8.
(4)
Assignments of exposure analysis responsibilities to members of the
AMT.
b.
Some AMTs may find it useful to use an algorithm to provide a quasi-quantitative
basis to an otherwise subjective assessment. The recommended assessment method is easy to
understand and use; is quantitative enough to provide a measure of hazard severity to allow the
prioritization of facilities in terms of the need for corrective action; and provides a listing of
factors not readily amenable to quantification, but which should be considered by the IC in final
corrective action decision making.
(1)
The assessment algorithm presented and discussed here is self-contained
and simple to use. The algorithm consists of a checklist (see appendix C), an assessment index
matrix, and a table of recommended management actions. In accordance with Army policy, the
checklist must be completed by an AHERA certified management planner. The management
planner may use the checklist either in concert with a survey inspection of a functional space or
in a separate evaluation of the ACM in a functional space at a later date, following a survey
inspection.
(2)
The assessment algorithm discussed is a modified US Air Force system
that must have the conditions specified in PWTB 420-70-8, Paragraph 5-8 b and is more
applicable to small Army installations. The assessment algorithm for large Army installations is
found in PWTB 420-70-8, Appendix D. The Army ACM checklist Part I and Part II
B-10
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