A letter confirming that DEP has completed all specified clean-up and monitoring activities for 114 Liberty Street.
NYC-WTC_000151379–000151391Folder label: “WTC DC TO RC LETTERS CALLEHAN WHITMAN ETC. WARD DOCTOROFF KENNY”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document f z .
COPC document, which was adopted as a secondary clearance value for this project, is 1 gg/m’. Although the value chosen for this project was 1 the analytical detection limit available for analyzing crystalline silica in indoor air samples is higher than this value, therefore a result that is below the detection limit is considered to be protective of public health. Four out of eleven samples (36%) were above the detection limit of 11 gg/m’, ranging from 17.2 to 22.1 gg/m’. These values are also above the secondary clearance value.
Although these values are above the clearance value, they are similar to concentrations detected in a background study conducted by USEPA. In the USEPA background study, there was a frequency of detection of 25%, with a range of 4 to 259 gg/m’. Further, the values from the background study without the maximum value of 259 gg/m\ provide a range of 4 to 28 This indicates that the range of values observed in 114 Liberty Street are similar to those observed in the background study. Based on this, it has been determined that the crystalline silica results are similar to background values and therefore additional cleaning is not necessary.
NYC-WTC_000151384
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NYC-WTC_000151361
A letter defending the validity of DEP and contractor data used to clear residential units at 114 Liberty Street for re-occupancy.
20 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.996
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.
19 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155002
Federal agencies respond to resident concerns regarding the validity of environmental clearance data for 114 Liberty Street.
20 shared non-person entities · 1 shared topics · similarity 0.997
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.
20 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000100730
Chain of custody document tracking the collection and transport of asbestos bulk samples for analysis.
19 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000100789
Laboratory analysis results for asbestos content in beige bulk samples collected from a pizzeria on one of the building floors.
15 shared non-person entities · 1 shared topics · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000100796
Laboratory analysis results for asbestos content in beige bulk samples collected from a pizzeria on one of the building floors.
16 shared non-person entities · 1 shared topics · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149432
DEP asbestos project notification form and inspection report dated December 12, 2002.
14 shared non-person entities · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000100784
Cover page for a fax transmission from the DEP Asbestos Laboratory regarding samples from 114 Liberty Street.
7 shared non-person entities · 1 shared topics · similarity 0.970
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.
12 shared non-person entities · similarity 0.969
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.
13 shared non-person entities · similarity 0.967
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000112085
Header page identifying records related to environmental work at 20 Vesey Street.
8 shared non-person entities · similarity 0.967
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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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_000151341
Administrative notice requiring preservation of original World Trade Center documents as evidence for potential future legal proceedings.
Filed in the same folder
NYC-WTC_000151342
Letter reporting DEP air monitoring results for particulate and fiber at a specific agency office showing levels below detection.
Filed in the same folder
NYC-WTC_000151345
A memorandum outlining required procedures for building owners to follow when cleaning up debris and dust affected by the WTC attack.
Filed in the same folder
NYC-WTC_000151348
A memorandum outlining required procedures for building owners to follow when cleaning up debris and dust affected by the WTC attack.
Filed in the same folder
NYC-WTC_000151350
A DEP letter describing joint agency efforts to sample air, dust, and water in Lower Manhattan following the September 11 attacks.
Filed in the same folder