Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M in March 2002.
NYC-WTC_000177779–000177780
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan April 17, 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 - ng/m^ COKCEN1KATIO.N ..OMCiSNIMAlM . Mard.8 ■ Marchis*”' - 1st Floor Hallway - east end/DXl 0.0029 0.0010
1 St Floor Hallway - west end/DX2 0.00032 0.00031
The concentrations on indoor surfaces ranged from 0.00031 to 0.0029 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 ASSOC/A TES INC.
James R. Cohn, CIH, CSP Regional Manager Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_003444374 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177780
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NYC-WTC_000177794
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 14, 2002.
10 shared non-person entities · 1 shared topics · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗12 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.
12 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177792
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 22, 2002.
12 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.996
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NYC-WTC_000177794
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 14, 2002.
Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.998 (not a probability)
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Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M in March 2002.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.997 (not a probability)
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NYC-WTC_000177794
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 14, 2002.
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