3.9.5
Preabatement Environmental Air Monitoring
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NOTE: The designer shall research the state,
regional and local laws, regulations, statutes,
etc., to determine air monitoring requirements.
Demolition projects may not require clearance
monitoring.
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Preabatement environmental air monitoring shall be established [1 day]
[_____] prior to the masking and sealing operations for each regulated area
to determine background concentrations before abatement work begins. As a
minimum, preabatement air samples shall be collected using NIOSH 94-113
Method 7400, PCM at these locations: outside the building; inside the
building, but outside the regulated area perimeter; and inside each
regulated work area. One sample shall be collected for every 185 square
meters 2000 square feet of floor space. At least 2 samples shall be
collected outside the building: at the exhaust of the HEPA unit; and
downwind from the abatement site. The PCM samples shall be analyzed within
24 hours; and if any result in fiber concentration greater than 0.01 f/cc,
asbestos fiber concentration shall be confirmed using NIOSH 94-113 Method
7402 (TEM).
3.9.6
Environmental Air Monitoring During Abatement
Until an exposure assessment is provided to the CO, environmental air
monitoring shall be conducted at locations and frequencies that will
accurately characterize any evolving airborne asbestos fiber
concentrations. The assessment shall demonstrate that the product or
material containing asbestos minerals, or the abatement involving such
product or material, cannot release airborne asbestos fibers in
concentrations exceeding 0.01 f/cc as a TWA under those work conditions
having the greatest potential for releasing asbestos. The monitoring shall
be at least once per shift at locations including, but not limited to,
close to the work inside a regulated area; preabatement sampling locations;
outside entrances to a regulated area; close to glovebag operations;
representative locations outside of the perimeter of a regulated area;
inside clean room; and at the exhaust discharge point of local exhaust
system ducted to the outside of a containment (if used). If the sampling
outside regulated area shows airborne fiber levels have exceeded background
or 0.01 f/cc, whichever is greater, work shall be stopped immediately, and
the Contracting Officer notified. The condition causing the increase shall
be corrected. Work shall not restart until authorized by the CO.
3.9.7
Final Clearance Air Monitoring
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NOTE: The designer will research the state,
regional and local laws, regulations, statutes,
etc., and consult with the customers to determine
final air clearance monitoring requirements.
(Demolition projects may not require clearance
sampling). Remove and/or edit the subparagraphs
accordingly.
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[The Contractor's Designated IH shall] [The CO's IH will] conduct final
clearance air monitoring using aggressive air sampling techniques as
SECTION 13280A
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