NYC-WTC_000180110
Report of air sampling for metals conducted at the referenced school on June 22, 2002.
14 shared non-person entities · 1 shared topics · similarity 0.990
machine-extracted · confidence unavailable · Check page ↗Document / 2 pages
NYC-WTC_000227070
Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000227070–000227071Page image
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OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan June 19,2002 Air Sampling for Metals Page 2 H.S. of Economics & Finance (833M) ATC Project No. 15-19125-0291
Results
Chromium (Cr) and aluminum (Al) were detected in all four samples and in the blank. Blank- correcting the Cr and Al concentrations lowers them to below or just above the limit of detection.
The Environmental Protection Agency (EPA) has set a screening level for hexavalent chromium (the more toxic form) in air of 0.6 ug/m\ this assumes a continuous exposure for one year. The samples here were analyzed for total chromium (trivalent and hexavalent).
The EPA has no screening level or standard for aluminum in ambient air.
ATC appreciates the opportunity to provide this indoor air quality service to the BOE. Please call me at (212) 353-8280 extension 212 if you have any questions.
Sincerely, ATC Associates, Inc.
Reviewed By
jAmel Jav/^ James R. Cohn, CIH, CSP Senior Project Manager Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC100_002923988
NYC-WTC_000227071
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NYC-WTC_000227071Source: NYC Law Department, mirrored locally
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NYC-WTC_000175558
Letter report detailing air sampling for metals conducted on June 22, 2002, at the School of Economics and Finance.
14 shared non-person entities · 1 shared topics · similarity 0.990
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.988
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.987
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.985
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.984
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175577
Letter report detailing air sampling for metals conducted on March 15, 22, and 29, 2002, at the referenced school.
12 shared non-person entities · 1 shared topics · similarity 0.984
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.983
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175567
Letter report detailing air sampling for metals conducted on multiple dates between May and June 2002 at the referenced school.
12 shared non-person entities · 1 shared topics · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗Filed elsewhere
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NYC-WTC_000175558
Letter report detailing air sampling for metals conducted on June 22, 2002, at the School of Economics and Finance.
Similarity score 0.987 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000180110
Report of air sampling for metals conducted at the referenced school on June 22, 2002.
Similarity score 0.987 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.985 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.982 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.982 (not a probability)
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