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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 14, 2002.
NYC-WTC_000177794–000177795Page image
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan March 8, 2002 Wipe Samples for Dioxins Page 2 P. S. 234 /Manhattan') ATC Project No. 15-19125-0279
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. The sample locations and the results are shown in the table: DIOXIN WIPE SAMPLE RESULTS (2,3, 7, 8 TCDD EQUIVALENTS) February 14, 2002 DIOXINCONCENTRATION LOCATION/SAMPLE NUMBER .(ng/m2)
1st Floor Hallway - east end/DXl 0.00055
1 st Floor Hallway - west end/DX2 0.00011
Blank/DX3 0.000075
The concentrations on indoor surfaces were 0.00011 and 0.00055 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, ATC ASSOCIATE^JN^___
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_0 03444442 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177795
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NYC-WTC_000177795Source: NYC Law Department, mirrored locally
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Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 22, 2002.
10 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177770
Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M in March 2002.
10 shared non-person entities · 1 shared topics · similarity 0.998
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