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NYC-WTC_000214995
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan March 8, 2002 Wipe Sampling for Dioxin Page 2 P. S. 150 (Manhattan) ATC Project No. 15-19125-0289
RESULTS
ATC submitted one wipe sample for PCDDs/PCDFs (plus one blank) to Pace for analysis. The sample area was 1 square meter (Im^). The location sampled was the Main Entrance - Lobby.
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. Copies of the draft laboratory analysis results arc attached. The results of the samples are shown in the following table:
DIOXIN WIPE SAMPLE RESULTS (2,3, 7, 8 TCDD EQUIVALENTS) February 16,2002 If
MAIN ENTRANCE - LOBBY/DXl 0.00013 ng/m2
FIELD BLANKT3X2 0.00 ng/sample
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 dioxin concentration in this 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.
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, Ii
James R. Cohn, CIH, CSP Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC1OO_OO2871417
NYC-WTC_000214996
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NYC-WTC_000214996Source: NYC Law Department, mirrored locally
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ATC Associates report on polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 150M in March 2002.
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