Second volume of ambient air sampling and visual observation results for 105 Duane Street after the WTC collapse.
NYC-WTC_000104321–000104551Folder label: “105 DUANE ST 1001650, 151/1”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
v!ATC ASSOCIATES I N C. Ambient Air Sampling
Subject: Tribeca Towers 105 Duane Street Re: Ambient Air Sampling Location: 10 Floor common hallway, 2nd floor Mechanical Room From: Fred Burkhardt Date: December 19, 2001
On December 12, 2001, ATC collected a total of ten ambient air samples, five from within the 10th floor. common hallway and five within the 2nd floor mechanical room to
t ascertain the presence or absence of airborne asbestos. The samples were collected at the request of the New York City Department of Environmental Protection (NYCDEP) in response to a tenant complaint regarding hallway duct cleaning operations. Samples I were analyzed in accordance with the more stringent AHERA Transmission Electron Microscopy (TEM) method as set forth at 40 CFR Part 763, Subpart E, Appendix A. In the absence of a specific ambient air standard for asbestos, regulatory agencies have I been using the AHERA re-occupancy requirement following an asbestos abatement action. This standard of an average of less than 70 asbestos structures per square millimeter (<70 s/mm2) per sample set is the most stringent reoccupancy requirement I available, and has been designed to be protective of children following an asbestos project.
Based upon the analytical results from both the 10th floor hallway and 2nd floor mechanical room of no asbestos structures detected, which is below the AHERA clearance requirement. It is ATC's opinion that duct-cleaning activities did not result in elevated asbestos levels within those spaces, and the ambient conditions sampled at the time of testing meet an acceptable criterion for occupancy. If you have any 'I questions or require additional explaination of the information presented please do not hesitate to call me at 212-353-8280 extension 343.
Thank You.
NYC-WTC 000104497
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Summary of ambient air sampling and visual observations at 105 Duane Street following the WTC collapse.
27 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.991
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Cover letter and summary of ambient air sampling and cleanup activities at 400 Chambers Street from 2002.
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Chain of custody documentation for background sampling including asbestos and lead at 250 Broadway in September 2001.
11 shared non-person entities · 1 shared topics · similarity 0.981
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Summary of transmission electron microscopy results for asbestos samples from 250 Broadway dated September 16, 2001.
6 shared non-person entities · 1 shared topics · similarity 0.977
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Cover page for a report containing TEM results and chain of custody documents for airborne asbestos monitoring.
11 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · 1 shared topics · similarity 0.968
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Custody form documenting the transfer and analysis of air samples collected at 125 Water Street in September 2002.
11 shared non-person entities · similarity 0.965
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000105988
Laboratory report on asbestos fiber analysis by transmission electron microscopy for 250 Broadway dated October 1, 2001.
5 shared non-person entities · 1 shared topics · similarity 0.963
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Laboratory report from ATC Associates detailing transmission electron microscopy results for air samples collected at a WTC cleanup site.
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Cover page for an air monitoring and bulk sampling report for Building #200 at 375 South End Avenue.
17 shared non-person entities · similarity 0.960
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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