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NYC-WTC_000196571
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NYC 9/11 Public Portal Document
Mr Bernard P Orlan November 25, 2002 Wipe Samples for Dioxins Page 2 P S 124 Manhattan ATC Protect No 15-19125-0350
Each sample was analyzed for sixteen (16) PCDD/PCDF isomers The results for each isomer were then converted to 2, 3, 7, 8 tetra'chloro-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-) September 12,2002
Lobby-Main Entrance / DX-1 0 00
2nd Floor Hallway by Room 222 / 0 000035 DX-2 Srd Floor Hallway by Room 307 / 0 00 ___________ DX-3___________ Blank / DX-4 0.00
The New York State Department of Health (NYSDOH) established guidelines for dioxm for the re-occupancy of the Binghamton State Office Building following a PCB fire. The NYSDOH guideline for dioxm on surfaces is 25 nanograms per square meter (25 ng/m^)
The concentrations on indoor surfaces ranged from 0 00 to 0.000035 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 these samples was deposited. Dioxin samples were not collected from these locations prior to these samples therefore a background sample is not available for comparison purposes.
It is our pleasure to provide these indoor environmental services to the NYC Department of Education If you have any questions about this report, please call (212) 353-8280, extension 212
Sincerely, ATC Associates, Inc.
James R Cohn, CIH, CSP Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC100_003041818
NYC-WTC_000196572
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NYC-WTC_000196572Source: NYC Law Department, mirrored locally
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Memo reporting results of wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at P.S. 124M on September 12, 2002.
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