Air sampling for hydrocarbons, P.S. 124, Sept 2002

NYC 9/11 Public Portal Document

Mr. Bernard P Orlan September 9, 2002 Air Sampling for Hydrocarbons Page 2 PSI (Manhattan) ATCProiectNo 15-19125-0340

The sampling locations were as follows.

Floor Main 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 mam lobby The concentrations are shown in the table

ACETONE CONCENTRATIONS March 13, 2002 . ' /s.,IjOCATION, six

Hallway by Room 403 0.088 BDL** 3 __________ VOC3________ Mam Lobby BDL 0.18 VOCl * parts per million ** Below Detection Limit

Acetone is a common solvent in a variety of mdustnal processes and is the 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 James R. Cohn, CIH, CSP Industl Regional Manager Industnal Hygiene Division

Attachment

CONFIDENTIAL, CITY_21MC1OO_OO3431332 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175519