NYC-WTC_000196589

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan September 9, 2002 Air Sampling for Hydrocarbons Page 2 P. S. 2 (Manhattan) ATC Project No. 15-19125-0341

The sampling locations were as follows;

r* Floor Main Lobby, 2"'’ Floor Hallway by Room 213 and 4* Floor Hallway by Room 403.

Results

The only hydrocarbon in the analyte panel detected was B-Hydrocarbons at concentration of 0.25 parts per million (ppm) n the sample collected from the 2"“^ Floor Hallway by Exit 2&3. B- Hydrocarbons include mineral spirits and naphtha which are ingredients of many paints and coatings. Its presence in the 2"‘‘ Floor Hallway sample cannot be linked to any specific activity in the building, it may be a trace contaminant 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 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:

O'' 6 Tenzin Namgyal James R. Cohn, CIH, CSP Industrial'Hygienist Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_003041989

NYC-WTC_000196590