NYC-WTC_000209190

NYC 9/11 Public Portal Document

DRAFT

Environmental Monitoring Update Data reported to NYC DOH 9/21/01 as of 4 pra (EPA & ConEd)

Asbestos Ambient air monitoring

Agency Date Location (see notes on N N above N above Maximum Comment page 3) samples 0.01 OSHA (fibers/cc) fibers/cc * pel@ USEPA (round 9/18/01- New Jersey 8 0 0 All were less than detection 10?, not specified) 9/19/01 limit; highest detection limit was <0.0048 by TEM. 9/19/01- Inside controlled 15 0 0 0.010 by Highest was located at West and 9/20/01 zone PCM Vesey. TEM was <0.0073. 9/19/01- Perimeter of 8 0 0 0.012 by Highest was located at West and 9/20/01 controlled zone PCM Warren. TEM was <0.0084. 9/19/01- Neighborhood near 6 0 0 0.017 by Highest was located at Liberty 9/20/01 controlled zone PCM and South End. TEM was <0.0064. 9/19/01- Fresh Kills Landfill 27 1 0 0.0299 by Highest was located at Location 9/20/01 TEM #9. PCM was 0.010. NYC-DEP 9/20/01 5 schools, distant 12 0 0 0.003 by from controlled zone PCM

o * Approximately equivalent to indoor clearance level for residences or schools. EPA results by TEM method, NYC-DEP by PCM H @ 0.1 fibers per cc by PCM method; US-OSHA permissible exposure limit for 8 hour time weighted average.

I o o I o o to co Draft: 9/23/01 \EnvironmentalMonitoringUpdate_9_2l co Page:I of 3 co co

NYC-WTC_000209190