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
Post Cleaning - Four air samples were collected for asbestos. The samples could not be analyzed due to overloading of particulate matter on the filters. Therefore, a third cleaning was conducted using a more aggressive cleaning method: a commercial HEPA vacuum and an AFD.
Post Cleaning - Six air samples were collected for asbestos after the third cleaning. The samples were analyzed for PCM, TEM AHERA, and PCMe. The results of the PCM analysis indicate that three of the six samples were belov' the detection limit. The remaining three samples were above the detection limit but below the secondary numeric criterion of 0.01 ficc. The TEM AHERA results indicate that all six samples were below the detection limit. The PCMe results also indicate that all six samples were below the detection limit. This suggests that the cleaning techniques used for the third cleaning were effective at reducing the particulate matter to levels that permitted valid air samples to be collected and analyzed, with the results indicating that all six samples were below the primary clearance criterion of 0.0009 S/cc.
Dioxin Before Cleaning Samples - Three pre-cleaning wipe samples were collected and analyzed for dioxin. The results indicate that dioxin was present find that the TEQ concentration for one of the three samples was above the primary clear ance criterion of 4 ng/m^.
Post Cleaning Samples - Four post-cleaning samples were collected and analyzed for dioxin. The results indicate that dioxin was present; hov/ever, the TEQ concentrations were below the primary clearance criterion of 4 ng/m^. This indicates that the cleaning techniques used were effective at reducing the pre-cleaning concentrations of dioxin.
Gypsum Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - Two air samples were collected after the first cleaning. Gypsum was not detected above the detection limit in the air samples.
Lead Before Cleaning Samples - Four micro vacuum samples and three wipe samples were collected. Lead was detected in all four micro vacuum samples at concentrations above the comparison value. Two of the three wipe samples d etected concentrations above the primary clearance criterion of 25 pg/ft^. The micro vacuum samples exceeded the comparison value in a range of 39.4 pg/ft^ to 135 pg/ft^ and the two wipe samples exceeded the primary clearance criterion at 48.7 pg/ft^ and 750 pg/ft^. This indicates that lead was present prior to cleaning.
Post Cleaning Samples - Two air samples, four micro vacuum samples, and four wipe samples were collected after the first cleaning. The two air samples were below the primary clearance criterion. The results of the micro vacuum and wipe samples show that all but one micro vacuum sample (26.9 pg/ft^) met the comparison value or primary clearance criterion for lead.
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NYC-WTC_000145750
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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
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Archival folder label for September 11 news clippings from the Office of the Mayor, identified as Folder 0123.
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Updated memorandum defining the Red Zone boundaries and listing authorized agencies for entry into the restricted area.
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NYC-WTC_000142373
Directory of organizations providing financial aid, job placement, and space assistance to businesses affected by the disaster.
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NYC-WTC_000145027
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
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Policy document outlining NYPD access requirements for building owners and contractors at the site in October 2001.
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