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PCDD/PCDF wipe sample report, PS 234M, Mar 2002
Machine-extracted title · confidence 95%Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 5, 2002.
NYC-WTC_000177801–000177802Page image
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OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan March 1, 2002 Wipe Samples for Dioxins Page 2 P. S. 234 (’Manhattan) ATC Project No. 15-19125-0279
The New York State Department of Environmental Conservation (NYSDEC) has set 0.0006 parts per million (ppm) as the allowable concentration of dioxin in soil. The EPA has established a residential clean-up goal of 1 part per billion (ppb).
Each sample was analyzed for sixteen (16) PCDD/PCDF isomers. The results for each isomer were then converted to 2, 3, 7, 8 Aetrachloro-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. The sample locations and the results are shown in the table: DIOXIN WIPE SAMPLE RESULTS (2,3, 7, 8 TCDD EQUIVALENTS)
LOCATION/SAMPLE NUMBER 1 st Floor Hallway - east end/DXl OTTO 1 st Floor Hallway - west end/DX2 0.0UU43 Blank/DX3 0.00
The concentrations on indoor surfaces were 0.0012 and 0.00043 ng/m^. These levels are well below the NYSDOH guideline.
It is not possible to determine when the 2, 3, 7, 8 - TCDD equivalents detected in these samples were deposited. Dioxin wipe samples were not collected from this school prior to December 6, 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, /I TC ASSOCIA TES INC.
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_003444467 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177802
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NYC-WTC_000177802Source: NYC Law Department, mirrored locally
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