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NYC-WTC_000199335
Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000199335–000199336Page image
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan September 16, 2002 Air Sampling for Metals Page 2 Beniamin Altman School fP.S. 42M) ATC Project No. 15-19125-0342
The established regulatory values for metals are intended for industrial workplace exposures and are not generally applicable to office/school settings. There are no standards for these mstals in indoor air in non-industrial situations.
Results
Chromium was detecied in all of the samples obtained (including the blank). Copper was also detected in two samples and blank Blank-correcting the samples lowers Cr and Copper concentrations to below the limits of detection for the analyses. Aluminum and Iron were detected only in the Main Lobby sample and not detected in the blanks.
The En\'ironmental Protection Agency (EPA) has set a screening level for hexavalent chromium in air of ( .6 ug/m\ this assumes a continuous exposure for one year. The samples here were analyzed for total chromium (trivalent and hexavalent). The concentrations are well below the EPA level. •! The EPA has set no screening levels for Al, Cu or Iron in ambient air. I
ATC appreciates the opportunity to provide this indoor air quality service to the DOE. Please call me at (212) 353-8280 extension 298 if you have any questions.
Sincerely, ATC Associates, Inc.
- 7 Z-z Reviewed by:
Wagdi Abdelshahid Mr. Michael G.TJonovan, CIH Industrial Hygienist Manager of Industrial Hygiene Division
Attachment
CITY_21MC100_003049194
NYC-WTC_000199336
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NYC-WTC_000199336Source: NYC Law Department, mirrored locally
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