NYC 9/11 Public Portal Document
By the next Working Group meeting, a draft SOW and a “Pros vs Cons” chart of
sampling methods will be developed.
Total dust will be incorporated into the study.
2. EPA Cleaning Effort
• Six scenarios of cleaning techniques are being tested.
- The HEPA vacuum that was distributed by FEMA should be included as a
scenario.
• All attempts are being made to keep analytical and sampling methods consistent
with those of the background study.
• A proposed list of buildings has been received from NYC.
3. NYC Exterior Cleaning
• The legal issues are being resolved concerning entry into the buildings.
• After the building owners are notified that their building exterior is scheduled to
be cleaned, approximately five days are allotted to receive the signed release
forms from them.
• Cleaning and air monitoring contractors are in place.
• The list of buildings to be exterior-cleaned will be shared with the Working
Group.
• EPA stated that asbestos debris was found at 150 Franklin Street and it was
identified as previously cleaned.
4. Potential Indicator Chemicals (PIC)
• PAHs and dioxins have been taken off the air sampling list.
• The group is working on clearance levels for silica.
• It has been decided that‘K’ factors for correlation will not be used.
• Samples will be compared to both background levels and risk levels.
• Loading and concentrations will be determined on all PICs during the pilot study.
5. FEMA Submission
• There is a meeting scheduled with FEMA on the afternoon of April 25th.
6. Peer Review
• Informal peer review is ongoing and encouraged. Final concensus on the formal
peer review process has not been reached.
7. Recommendations for Air Conditioners
• A draft fact sheet has been developed and will be shared with the Working Group.
8. NYC Database
• NYC expects to have a draft of the database ready for the federal agencies to
review on April 26th.
Next meeting: May 2nd at 10:00 AM - 12:00 PM @ 290 Broadway.
NYC-WTC_000140674
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