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NYC-WTC_000218496
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan March 1,2002 V/ipe Samples for Dioxins Page 2 P. S. 234 (Manhattan) ATC Proiect 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 -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: DIOXIxN WIPE SAMPLE RESULTS (2,3, 7,8 TCDD EQUIVALENTS) DIO™ CONCENTRATION :ATION/SAMTLE NUMBER Y (ng/m2) 1 1^1 Floor Hallway - east end/DXl Oliblo 1 st Floor Hallway -- west end/DX2 0.00043 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, A TC ASSOCIA TES INC.
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
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CITY_21MC100_002879143
NYC-WTC_000218497
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NYC-WTC_000218497Source: 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 5, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177806
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 29, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.993
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177811
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 22, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗13 shared non-person entities · 1 shared topics · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177713
ATC Associates report on dioxin wipe samples collected at P.S. 89M on January 31, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.991
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.990
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177801
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 5, 2002.
Similarity score 0.996 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177806
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 29, 2002.
Similarity score 0.986 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.986 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177811
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 22, 2002.
Similarity score 0.986 (not a probability)
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