Laboratory report from ATC Associates providing results of wipe samples for dioxins and furans collected at a NYC school in February 2002.
NYC-WTC_000175678–000175679
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NYC 9/11 Public Portal Document
Mr. Bernard P Orlan .March 21. .2002 Wipe Samples for Dioxins Page 2 Stupes: Uli JhhJiJchppnManhattanl ATC Project No. 15-19125-0246
Each sample was analyzed for sixteen (16) PCDD/PCDF isomers. The results for each isomer wei-e then conveded to 2, 3, 7, 8 tetrachloro-dibenzo-p-dioxin (2. 3, 7, 8-TCDD) equivalents by multiplying by- an established equivalency factor. This provides a single value (in nanograms) for the analytical results for each sample. Copies of the draft analysis reports are attached. The results are shown in the following table.
DIOXIN WIPE S.AMPLE RESULTS 2, 3, 7. 8 TCDD EQUIVALENTS - Nanograms per square meter (ng in-)
LOCATION /SAMPLE DIOXIN CONCENTRATION ID 1 ’' Floor Lobby Mam Entrance / DXl 0.000028 11Floor Lobby Bri.ige Entrance /DX2 0.000064 ______
Mixed Air Plenum/ DX3 0.0020
field Blank/DX4 0.0043
The Nev. York 5.l ate Department of Health (NYSDOH) established guidelines for dioxin for the re-occupancy of the Binghamton State Office Building following a PCB fire. The NA’SDOH guideline for dicxin on surfaces is 25 nanograms per square meter (25 ng/m-). The New York State Departmert of Environmental Conservation (Nh'SDEC) has set 0.0005 parts per million (ppm) as the allowable concentration of dioxin in soil, fhe ETA has established a residential clean-up goa of 1 part per billion (ppb).
The concentratic-ns on indoor surfaces ranged from 0.00002S to 0.0020 nanograms per square meter (ng/m-). The levels found in all of these samples are below the NYSDOH guideline of 25 ng/m-.
It is not possible to determine when the 2, 3, 7, 8 - TCDD equivalents detected in this sample was deposited. Dioxin samples were not collected from these locations prior to November 8. 2001, and the ref ire a background sample is not available for comparison purposes.
Il is our pleasure to provide these indoor environmental services to the NYC Board of Education. If you have any questions about this report, please call (212) 353-S2S0, extension 212.
Sincerely, ATC .Associates. Inc,
James R. Cohn. CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_003432362 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175679
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NYC-WTC_000175676
Laboratory report from ATC Associates providing results of wipe samples for dioxins and furans collected at a NYC school in February 2002.
11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175680
Laboratory report from ATC Associates providing results of wipe samples for dioxins and furans collected at a NYC school in February 2002.
11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175051
ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on February 14, 2002.
11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175058
ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on March 8, 2002.
11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175721
Laboratory report detailing polychlorinated dibenzo-p-dioxins and furans (PCDDs/PCDFs) wipe sample analysis from a New York City Board of Education school collected in March 2002.
11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175694
Laboratory report detailing polychlorinated dibenzo-p-dioxins and furans (PCDDs/PCDFs) wipe sample analysis from a New York City Board of Education school collected in March 2002.
11 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175045
ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on January 30, 2002.
11 shared non-person entities · 1 shared topics · similarity 0.993
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NYC-WTC_000175676
Laboratory report from ATC Associates providing results of wipe samples for dioxins and furans collected at a NYC school in February 2002.
Similarity score 0.994 (not a probability)
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machine-extracted · confidence unavailable · Check page ↗Similarity score 0.993 (not a probability)
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175252
Memo reporting results of wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at P.S. 126M on August 29, 2002.
Similarity score 0.993 (not a probability)
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Laboratory report from ATC Associates providing results of wipe samples for dioxins and furans collected at a NYC school in February 2002.
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