3.12
The laboratory shall be successfully participating in the AIHA/NIOSH Proficiency
Analytical Testing (PAT) program and be Certified by the State of New Hampshire.
Numbers and frequencies of personal air sampling shall be as required by OSHA
regulations but not less than one (1) sample per eight (8) hour work shift during times of
asbestos removal and related work.
Results of sample analysis shall be provided to the Engineer within twenty-four (24)
hours of collection.
The Contractor shall provide a pre-approved "chain-of-custody" form for all personal air
samples collected.
FINAL WORK AREA CLEARANCE
The final air clearance testing shall take place using aggressive air sampling techniques.
The Contractor shall supply and operate circulating fans and leaf blowers as directed by
the Engineer during this final testing to ensure effective air circulation. The final test
shall consist of taking air samples in the Work Area to establish that contamination
levels do not exceed 0.01 f/cc or the established baseline as determined by NIOSH
Method 7400 (Phase Contrast Microscopy).
The Department may require final air clearance testing by the method specified in 40
CFR Part 763, Subpart E, Appendix A (Transmission Electron Microscopy).
Surface wipes and/or bulk samples may also be taken and analyzed at the option of the
Engineer to confirm that all microscopically detectable asbestos has been removed.
Analysis will be performed using approved EPA methods, including but not limited to,
Method 600/M4-82-920 for bulk asbestos sample analysis.
If the results of any of the final testing as described herein are not satisfactory, thorough
wet cleaning and/or HEPA vacuuming shall be repeated until the required
decontamination levels are achieved. The Contractor shall bear all costs for additional
cleaning until the area passes final Work Area clearance.
After achieving the level of cleanliness and decontamination, as specified herein and as
confirmed by the final inspections and testing, the Contractor will be notified of Work
Area clearance.
After successful completion of the final air clearance testing, the Contractor shall
carefully remove the Decontamination Facilities and any temporary barrier walls or
tunnels. The HEPA-exhaust systems shall be removed only after all other items are
removed. A sufficient number of HEPA-vacuum shall be kept on-site during this final
disassembly work to cleanup any dust or debris.
END OF SECTION
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