Air monitoring data summary, NYC DOH, Sep 2001

NYC 9/11 Public Portal Document

DRAFT

Personal air monitoring

Agency Date Location (see Activity N N above Maximum Comment notes on page samples TWA (fibers per 3) OSHA cc) PEL* ConEd 9/21/01- Inside Splicing 7 0 0.026 f/cc Max value was taken at Rector and 9/23/01 Controlled PCM Washington, No TEM given. Zone Unknown Walking 2 All were less than detection limit; highest detection limit was <0.011 by PCM method Inside No Stated 8 0 0.02 f/cc Max value was taken at Rector and Controlled Activity PCM Washington. No TEM given. Zone US Public 9/19/01 Inside Unknown 7 2 0.2777 by Location is ‘ground zero.’ Result Health Controlled TEM needs to be verified with PHS b/c Service Zone PCM result was only 0.046f/cc. 9/18/01- Fresh Kills Unknown 21 7 0.175 by (No analysis done by TEM for this 9/19/01 Landfill PCM location.) Union of 9/21/01 Unknown Operating 2 0 0.0373 by Operating location engineers TEM Engineers

*0.1 fibers per cc by PCM method; US-OSHA permissible exposure limit for 8 hour time weighted average.

Interpretation: Dusty work in control zone continues to have the potential to generate elevated levels of asbestos fibers. Continued use of appropriate respiratory protection for workers in or near potentially dusty locations or tasks is indicated. Dust suppression measures should be n enlianced. Additional personal monitoring underway.

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