NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan November 25, 2002
Wipe Samples for Dioxins Page 2
Stuyvesant High School iM477) ATC ProiectNo. 15-19125-0246
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 6,2002
LOCATION'SAMPLE ID DIOXIN CONCENTRATION
____________________________________
P' Floor Lobby
Main Entrance / DXl 0.00
2’^° Floor Lobby
Bridge Entrance /DX2 0.000026
H VAC 7 2/0X3 0.000040
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/m2).
The concentrations on indoor surfaces ranged from 0.00 to 0.000026 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 this sample
was deposited. Dioxin samples were not collected from these locations prior to November 8,
2001, and 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_003273046
NYC-WTC_000202499
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