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PCDD/PCDF wipe sample results, NYC Board of Education school, May
Machine-extracted title · confidence 95%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 May 2002.
NYC-WTC_000175719–000175720Page image
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan May 22, 2002 Wipe Samples for Dioxins Page 2 Stuyvesant High School (M4771 ATC Project No. 15-19125-0246 If' Each sample was analyzed for sixteen (16) PCDD/PCDF isomers. The results for each isomer were then converted 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. A copy of the laboratory analysis report is attached. The results are shown in the following table.
DIOXIN WIPE SAMPLE RESULTS 2,3, 7,8 TCDD EQUIVALENTS - Nanograms per square meter (ng/m^)
May 1, 2002 LOCATION /SAMPLE ID DIOXIN CONCENTRATION
1^ Floor Lobby 0.000043 Main Entrance / DXl 2^° Floor Lobby 0.000036 Bridge Entrance /DX2 HVAC#I/DX3 0.017
The New York State Department of Health (NYSDOH) established guidelines for dioxin for the re-occupancy of the Binghamton State Office Building following a PCB fire. The NYSDOH guideline for dioxin on surfaces is 25 nanograms per square meter (25 ng/m^).
The concentrations on indoor surfaces ranged Irom 0.000036 to 0.017 nanograms per square meter (ng/m^). The levels found in all of these samples are below the NYSDOH guideline of 25 ng/m2.
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 therefore a background sample is not available for comparison purposes.
It 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) 353-8280, extension 212.
Sincerely, ATC Associates, Inc.
Reviewed by:
James R. Cota, CIHJ3SP Woject Manager Regional Manager Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_0 03432651 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175720
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NYC-WTC_000175720Source: NYC Law Department, mirrored locally
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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 May 2002.
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