OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
5.12 Complexities
The interpretation of results from this study is complicated by several factors. This was a non controlled, field study. The WTC dust material is not homogeneous; in EPA’s ambient WTC settled dust bulk sampling only 35 percent of the samples contained greater than one percent w asbestos. The number of completely or partially uncleaned buildings available and willing to participate in the study was very limited. Thus, in the selected building, units varied in the amount of baseline contamination, and results of baseline testing were not available prior to the assignment and initiation of the first set of cleaning protocols. Therefore, some cleaning methods * (Scope A, IB and 2B) were only tested on units with lower levels of contamination. Therefore, it is difficult to draw conclusions about the ability of these methods to remove heavy contamination. It was not possible to make every comparison between methods and the level of contamination. In addition, a large number of cleaning methods were tested, given the number of units available for pilot cleaning. This limited the number of times each method could be tested, and makes the w overall results more susceptible to fluctuations due to extreme data points that may represent rare, unusual conditions. Variation in the types of sampling conducted pre- and post-cleaning events make it difficult to compare certain indices of contamination to different cleaning methods.
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CITY_21MC100_011105349
NYC-WTC_000195315
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NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
45 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145027
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
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155174
Chain of custody documentation for cleanup and monitoring samples at 114 Liberty distributed among project team members.
12 shared non-person entities · similarity 0.965
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138897
Internal DEP coordination regarding comments on 114 Liberty procedures and preparation of a response.
12 shared non-person entities · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000176247
Comprehensive environmental assessment report prepared by TRC Engineers for the New York City Law Department.
17 shared non-person entities · 1 shared topics · similarity 0.963
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155286
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 0.962 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154948
Federal agencies respond to resident concerns regarding the validity of environmental clearance data for 114 Liberty Street.
Similarity score 0.957 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145345
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
Similarity score 0.956 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151379
A letter confirming that DEP has completed all specified clean-up and monitoring activities for 114 Liberty Street.
Similarity score 0.956 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000102633
A Department of Environmental Protection letter dated April 24, 2003, confirming the completion of clean-up activities and clearance levels at 114 Liberty Street.
Similarity score 0.955 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Machine-extracted building matches; verify each source. Buildings, never households.
Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.
NYC-WTC_000145695
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