NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan April 5, 2002
Wipe Sampling 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 are shown in the following table:
DIOXIN WIPE SAMPLE RESULT
(2, 3, 7, 8 TCDD EQUIVALENTS)
March 1,2002
ist Floor Main Entrance- Lobby/DXl 0.0015 ng/m-
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,
James R. Cohn, CIH, CSP
Regional Manager
Industrial Hygiene Division
Attachment
CITY_21MC100_002871441
NYC-WTC_000215000
OCR can misread numbers and units. Confirm readings against the page image before using them.