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NYC-WTC_000199344
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NYC 9/11 Public Portal Document
Mr, Bernard P. Orlan September 13, 2002 Air Sampling for Hydrocarbons Page 2 P. S. 42 (Manhattan) ATC Proiect No. 15-19125-0342
The sampling locations were as follows:
Floor Mam Lobby, 2"'* Floor Hallway by Room 207 and 3*^ Floor Hallway by Room 309.
Results
The hydrocarbons detected in the analyte panel were A-Hydrocarbons and B-Hydrocarbons. A- Hydrocarbons were detected at concentration of 0.064 parts per million (ppm) in the sample collected from the 2"^ Floor Hallway by Room 207. B-Hydrocarbons were detected at concentration of 0.053 ppm and 0.062 ppm in the samples collected from the Floor Main Lobby and 3"^ Floor Hallway by Room 309 respectively.
The presence of these two analytes in the samples cannot be linked to any specific activity in the building, it may be trace contaminants from outdoors. No specific source has been identified.
No other HCs in the panel were present in the samples above the limits of detection for the •f analyses.
ATC appreciates the opportunity to provide this indoor 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:
T^ftim N amgyal James R. Cohn, CIH, CSP mdustrial Hygienist Regional Manager Industrial Hygiene Division
Attachment
CITY_21MC100_003049216
NYC-WTC_000199345
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NYC-WTC_000199345Source: NYC Law Department, mirrored locally
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