Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 22, 2002.
NYC-WTC_000177792–000177793
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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 M IPE SAMPLE RESULTS (2, 3, 7, 8 TCDD EQUIVALENTS) February 22, 2002 DIOXIN CONCENTRATION LOCATION/SAMPLF NUMBER
1st Floor Hallway - east end/DXl 0.00029
1 st Floor Hallway - west end/DX? 0.000081
Blank/DX3 0.00
The concentrations on indoor surfaces were 0.000081 and 0.00029 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 ASSOCIATES r.
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CONFIDENTIAL, CITY_21MC100_0 03444432 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177793
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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 0.998
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machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.997
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177779
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 ↗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 0.997
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.997
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 ↗12 shared non-person entities · 1 shared topics · similarity 0.995
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000178040
ATC Associates report on polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 150M in April 2002.
12 shared non-person entities · 1 shared topics · similarity 0.995
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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 0.996 (not a probability)
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machine-extracted · confidence unavailable · Check page ↗Similarity score 0.995 (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 0.995 (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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Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M in March 2002.
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