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NYC-WTC_000189380
Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000189380–000189381Page image
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan April 5, 2002 Air Sampling for Hydrocarbons Page 2 H. S. for Leadership & Pub. Service tM894') ATC Project No. 15-19125-0290
Results
March 22
The only hydrocarbon found above the limit of detection was acetone. Acetone was detected at 0.42 parts per million (ppm) in the Main Lobby sample (VOCl) and at 0.16 ppm in the Roof sample (VOC4). It was not detected in the other two samples or in the blank.
March 29
Acetone was detected in all four samples and in the blank. Blank-correcting the acetone concentrations lowers them to below the limit of detection. No other hydrocarbons were detected.
April 5
None of the hydrocarbons in the panel were found at levels above the limits of detection for the analyses in any of the samples.
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.
James R. Cohn, CIH, CSP Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC100_003086498
NYC-WTC_000189381
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NYC-WTC_000189381Source: NYC Law Department, mirrored locally
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