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NYC-WTC_000199346
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan September 9, 2002 Air Sampling for Hydrocarbons Page 2 P. S. 1 fManhattan! ATCProectNo. 15-19125-0340
The sampling locations were as follows:
Floor Mam Lobby, 2"*^ Floor Hallway by Room 213 and 4* Floor Hallway by Room 403.
Results
The only hydrocarbons in the analyte panel detected m the samples were acetone and Xylene. Acetone was found in the sample collected from the 4" floor hallway by room 403 and Xylene was found in the sample collected from the main lobby. The concentrations are shown in the table.
ACETONE CONCENTRATIONS March 13, 2002 LOCATION ACETONE XYLENE SAMPLE NO. (ppm)* (ppm)* Hallway by Room 403 0.088 BDL*"*^ VOC3 I Main Lobby BDL 0.18 VOCl * parts per million ** Below Detection Limit
Acetone is a common solvent m a variety of industrial processes and is ihe principal component nail polish remover. It has occasionally been detected in indoor samples, however a specific source has not been identified in this case.
Xylene is another solvent frequently found in paints and coatings. Its presence in the Main Lobby sample cannot be linked to any specific activity in the building, it may be a trace contaminant from outdoors.
No other HCs in the panel were present in the samples above the limits of detection for the analyses.
ATC appreciates the opportunity to provide this air quality service to the DOE. Please call (212) 353-8280 extension 370 or 212 if you have any questions.
Sincerely, ATC Associates, Inc. Reviewed by:
Tenzin Namgyal \ James R. Cohn, (3IH, CSP Industrial Hygienist Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC100_003033412
NYC-WTC_000199347
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NYC-WTC_000199347Source: NYC Law Department, mirrored locally
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