OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
6. Summary
This complex study was able to identify a cleaning method that is able to reduce levels of the multiple contaminants that are associated with WTC-related dust and able to reduce those contaminants below health-based benchmarks. The specific cleaning method includes vacuuming porous and hard surfaces and wet wiping hard surfaces. The results also indicate that the cleaning method may need to be repeated several times, especially in heavily impacted apartments, to bring concentrations below health-based benchmarks. In addition, the results from this study indicate that using asbestos air sampling to determine if additional cleaning is necessary is an approach that should generally determine if an area has been cleaned effectively. The data also indicates that buildings that had significant amounts of WTC-related dust are likely to have had more contamination than those buildings that did not have significant amounts of dust deposited.
In conclusion, this study shows that while there were impacts to the indoor environment in this building from the collapse of the WTC, these types of impacts can be mitigated if the cleaning method identified is followed, perhaps several times, and should result in an indoor environment that is similar to those found prior to the collapse.
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NYC-WTC_000195316
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NYC-WTC_000145695
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Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
28 shared non-person entities · similarity 0.970
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Chain of custody documentation for cleanup and monitoring samples at 114 Liberty distributed among project team members.
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Internal DEP coordination regarding comments on 114 Liberty procedures and preparation of a response.
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17 shared non-person entities · 1 shared topics · similarity 0.963
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Formal letter criticizing the EPA and DEP for alleged failures in cleaning asbestos and silica from 114 Liberty Street.
13 shared non-person entities · 1 shared topics · similarity 0.962
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149899
Proposal for sampling and assessing building interiors in the vicinity of the World Trade Center site.
21 shared non-person entities · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
27 shared non-person entities · 1 shared topics · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155394
Transmission of cleanup and environmental monitoring documentation for 114 Liberty post-WTC dust remediation project.
11 shared non-person entities · similarity 0.960
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000102521
EPA letter confirming that primary and secondary clearance levels for asbestos and other contaminants were met at 114 Liberty Street.
9 shared non-person entities · 1 shared topics · similarity 0.960
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
Similarity score 0.999 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
Similarity score 0.964 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147982
A project proposal outlining the timeline, methods, and justification for cleaning HVAC systems in residential units affected by World Trade Center dust.
Similarity score 0.963 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000112085
Header page identifying records related to environmental work at 20 Vesey Street.
Similarity score 0.961 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
Similarity score 0.961 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151654
An EPA memorandum discussing asbestos wipe sampling, projected airborne levels from settled dust, and estimated cancer risks for World Trade Center cleanup scenarios.
Similarity score 0.961 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Machine-extracted building matches; verify each source. Buildings, never households.
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