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NYC-WTC_000224764
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan May 22, 2002 Wipe Samples for Dioxin Page 2 P. S. 150 (Manhattan) ATC Project No. 15-19125-0289
The 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 of the samples on each day are shown in the following table:
DIOXIN WIPE SAMPLE RESULT (2, 3, 7, 8 TCDD EQUIVALENTS) - Nanograms per square meter (iig/ni2)
April 1, 2002 LOCATION/SAMPLE NUMBER DIOXIN CONCENTRATION ist Floor Main Entrance- Lobby/DXl 0.00093
Blank 0.UUU032
April 15, 2002 LOCATION/SAMPLE NUMBER DIOXIN CONCENTRATION u.oo()022 Blank TJDUJO
April 22, 2002 LOCATION/SAMPLE NUMBER DIOXIN CONfENTRATIGN 1st Floor Main Entrance- Lobby/DXl 0.000055
Blank (JAH)
April 29, 2002 LOCATION/SAMPLE NUMBER DIOXIN CONCENTRATION 1st Floor Main Entrance- Lobby/DXl Blank 0.00U36
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^).
On each day, the dioxin concentrations in each sample is below the NYSDOH guideline.
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 this location prior to December 13, 2001.
CITY_21MC1OO_OO2894488
NYC-WTC_000224765
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NYC-WTC_000224765Source: NYC Law Department, mirrored locally
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