Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
NYC-WTC_000145695–000145868Folder label: “NO INFO”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
collected. Lead was detected in all three micro vacuum samples at concentrations above (approximately four to six times) the comparison value of 25 pg/ft^. Two of the three wipe samples had detectable concentrations of lead above the primary clearance criterion of 25 pg/ft^ while the third was below the primary clearance criterion.
Post Cleaning Samples - Two air samples, three micro vacuum samples and four wipe samples were collected after the first cleaning. The two air samples were below the primary clearance criterion of 1.0 pg/m’. However, at the time the results were received, the primary clearance criterion that was being used for comparison was the background clearance criterion of 0.1 pg/m’, not the health-based clearance criterion of 1.0 pg/m’ which was developed during the execution of this project. Therefore, additional air samples were collected after the second cleaning.
All three micro vacuum samples were below the detection limit. This indicates that the cleaning techniques used were able to reduce the elevated pre-cleaning lead concentrations that were observed in the settled dust in the areas where the samples were collected.
The results of three of the four wipe samples were below the primary clearance criterion (one sample was broken and not analyzed). The results from the first cleaning indicate that the cleaning technique was effective in removing the elevated concentrations of lead that were observed prior to the first cleaning. Since the primary clearance criterion was met for lead after the first cleaning, no additional samples were collected for the analysis of lead, with the exception of the air samples discussed above.
Post Cleaning - Two air samples were collected after the second cleaning. The results of both indicate that the samples were below the primary clearance criterion of 1.0 pg/m’. Since the primary clearance criterion was met for lead after the first cleaning, no additional samples were collected.
Alpha-Quartz Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post Cleaning Samples - Two air samples were collected after the first cleaning. Both were below the detection limit.
Cdcite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - Two air samples were collected after the first cleaning. Both samples were below the detection limit.
Cristobalite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post Cleaning Samples - Two air samples were collected after the first cleaning. Both samples were below the detection limit.
75
NYC-WTC_000145773
OCR can misread numbers and units. Confirm readings against the page image before using them.
Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
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 · Same agency, volume and box · similarity 0.960
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.
28 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.960
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 0.964
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 0.961
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · similarity 0.961
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 0.960
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 ↗NYC-WTC_000151524
EPA Region II letter confirming that primary and secondary clearance levels for asbestos and other contaminants were met at 114 Liberty Street.
10 shared non-person entities · 1 shared topics · similarity 0.959
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154940
EPA confirms that primary and secondary clearance levels for contaminants at 114 Liberty Street have been met.
10 shared non-person entities · 1 shared topics · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154998
EPA confirms that primary and secondary clearance levels for contaminants at 114 Liberty Street have been met.
10 shared non-person entities · 1 shared topics · similarity 0.956
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · similarity 0.956
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
Page similarity is temporarily unavailable or this page has no indexed vector.
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.
Archival folder label for September 11 news clippings from the Office of the Mayor, identified as Folder 0123.
Cited alongside this record in an Ask answer
Updated memorandum defining the Red Zone boundaries and listing authorized agencies for entry into the restricted area.
Cited alongside this record in an Ask answer
NYC-WTC_000142373
Directory of organizations providing financial aid, job placement, and space assistance to businesses affected by the disaster.
Cited alongside this record in an Ask answer
NYC-WTC_000145027
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
Cited alongside this record in an Ask answer
Policy document outlining NYPD access requirements for building owners and contractors at the site in October 2001.
Cited alongside this record in an Ask answer