Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
NYC-WTC_000175606–000175607
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
tSficrc 104 East 25th St., 10th Floor New York, New York 10010 www.atc-enviro.com 212,353.8280 Fax 212.353.8306 ASSOCIATES INC.
April 17, 2002
Mr. Bernard P. Orlan Director, Environmental Health & Safety New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101-4008
Re: Wipe Samples for Dioxins High School for Leadership and Public Service (M894) ATC Proj ect No. 15-19125-0290
Dear Mr. Orlar:
ATC Associates Inc. (ATC) is pleased to provide this report of the results of the wipe samples for polychlorinated dibenzo-p-dioxins (PCDDs)and dibenzofurans (PCDFs) collected on March 8, 2002, at the referenced location. The New York City Board of Education (BOE) requested these samples to e\'aluate possible contamination in the school building.
SCOPE OF WORK
The samples were collected using gauze pads and hexane as a solvent. The pads and solvent were provided and samples were analyzed by Pace Analytical Services, Inc. (Pace) of Minneapolis, MN, a laboratory experienced in dioxin analysis. The analysis was performed by modified EPA Method 8290 using combined capillary column gas chromatography/high resolution mass spectrometry.
Wagdi Abdelshahid, Industrial Hygienist of ATC’s New York City office, collected the samples consistent with generally accepted industrial hygiene practices. There were inherent limitations created by constraints of time, operational and work practice variability, variations in contaminant concentrations, and sampling and analytical accuracy. The results of the sampling represent conditions found on the dates the samples were collected..
WIPE SAMPLING RESULTS
ATC submitted three (3) wipe samples for PCDDs/PCDFs to Pace for analysis. A copy of the laboratory analysis report is provided in the Attachment. Samples were taken from areas in various parts of the building. The sample area was one square meter (1 m2).
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.
CONFIDENTIAL, CITY_21MC100_003431997 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175606
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NYC-WTC_000175642
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
11 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175638
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
11 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175604
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175608
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
11 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175640
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
11 shared non-person entities · 1 shared topics · similarity 0.995
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Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175604
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175642
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.998 (not a probability)
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NYC-WTC_000175642
Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
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