3.09
FINAL CLEANING AND DECONTAMINATION
This Subsection applies to the final cleaning of all work areas where asbestos has been
removed. After all Asbestos-Containing (or contaminated) Materials have been
removed, the Contractor shall remove all wastes and perform a thorough multi-stage
final cleanup and decontamination of each Work Area. Final cleaning shall be
performed only after all waste is packaged and removed, but prior to dismantling any
barrier, Decontamination Facility, or protective coverings. Work Area must be Certified
Clean by the Engineer as described herein based on a visual inspection and air testing.
Substrate cleanliness may also be confirmed via collection of bulk samples for analysis
via Polarized Light Microscopy and / or Transmission Electron Microscopy, 1f required
by the Engineer (see also Subsection 1.03.A.12). All HEPA Filtered Exhaust Units shall
operate continuously throughout the cleaning and air testing processes until the Engineer
agrees to their shutdown and removal from the site. The Contractor shall notify the
Engineer in writing at least 12 hours in advance of the expected completion time of site
cleaning in order to allow the Engineer to schedule air clearance testing.
Methods and Approvals: Cleaning methods shall be specified in the Contractor’s Plan
of Action & Standard Operating Procedures. Approvals and sequencing shall consist of
the following:
1. Remove all visible accumulations of debris on the protective coverings on floors,
walls, and other surfaces, and then HEPA vacuum all surfaces to pick up excess
water and gross saturated debris.
2. After HEPA-vacuuming, the Work Area air shall be lightly misted, and then all
protective coverings on ceilings, walls, floors, and other items in the Work Area
shall be wiped thoroughly clean.
3. After the Contractor has completed the above steps (1) and (2), Contractor shall
request the Engineer to inspect the site.
4. If the Engineer observes any debris within the Work Area during the inspection,
the Contractor shall perform additional cleanup and decontamination, as
necessary, until the Engineer accepts the work (acceptance of the cleanliness of
the work area is based solely on industry standards). However, the critical barrier
walls, Decontamination Facilities, HEPA Filtered Exhaust Units, and primary
isolation seals shall remain in place and in use.
5. After the Engineer accepts the cleaning, the Contractor shall apply penetrating
Encapsulant to all surfaces within the Work Area. The Encapsulant shall then be
allowed to dry and after the Engineer's review, slowly remove the upper layer of
all protective poly coverings on walls and other surfaces and package them in
Disposal Bags. These Disposal Bags shall then be removed from the Work Area
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