NYC 9/11 Public Portal Document
Mr Bernard P Orlan November 25 2002
Wipe Samples for Dioxins Page 2
P S 1 (Manhattan) ATCProiectNo 15 19125 0340
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 m the following table
DIOXIN WIPE SAMPLE RESULTS
2 3 7 8 TCDD EQUIVALENTS Nanograms per square meter (ng/m^)
August 27 2002
LOCATION /SAMPLE ID DIOXIN CONCENTRATION
Mam Lobby /DXl 0 000083
Hallway by Room 215 /DX2 0 00018
Hallway by Room 403 / DX3 0 000045
1
The New York State Department of Health (NYSDOH) established guidelines for dioxin for the 5
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 from 0 000045 to 0 00018 nanograms per square
meter (ng/m^) The levels found m 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 m these samples
was deposited Dioxin samples were not collected from these locations prior to these samples
therefore a background sample is not available for companson 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
CONFIDENTIAL, CITY_21MC100_003431180
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175475
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